15 results on '"Mathieu Nsenga Kumwimba"'
Search Results
2. An updated review of the efficacy of buffer zones in warm/temperate and cold climates: Insights into processes and drivers of nutrient retention
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Mathieu Nsenga Kumwimba, Jinlou Huang, Mawuli Dzakpasu, Koshila De Silva, Okugbe Ebiotubo Ohore, Fidelis Odedishemi Ajibade, Xuyong Li, Su Jingjun, Diana Kavidia Muyembe, and Huang Kaixuan
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Environmental Engineering ,General Medicine ,Management, Monitoring, Policy and Law ,Waste Management and Disposal - Published
- 2023
3. Vegetated urban streams have sufficient purification ability but high internal nutrient loadings: Microbial communities and nutrient release dynamics
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Mathieu Nsenga, Kumwimba, Mawuli, Dzakpasu, Xuyong, Li, Jinlou, Huang, Fidelis Odedishemi, Ajibade, Diana Kavidia, Muyembe, and H K M, Mihiranga
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Environmental Engineering ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Abstract
The release of nutrients back into the water column due to macrophyte litter decay could offset the benefits of nutrient removal by hydrophytes within urban streams. However, the influence of this internal nutrient cycling on the overlying water quality and bacterial community structure is still an open question. Hence, litter decomposition trials using six hydrophytes, Typha latifolia (TL), Phragmites australis (PAU), Hydrilla verticillata (HV), Oenanthe javanica (OJ), Myriophyllum aquaticum (MA), and Potamogeton crispus (PC), were performed using the litterbag approach to mimic a 150-day plant litter decay in sediment-water systems. Field assessment using simple in/out mass balances and uptake by plant species was carried out to show the potential for phytoremediation and its mechanisms. Results from two years of monitoring (2020-2021) indicated mean total nitrogen (TN) retention efficiencies of 7.2-60.14 % and 9.5-55.6 % for total phosphorus (TP) in the studied vegetated urban streams. Nutrient retention efficiencies showed temporal variations, which depended on seasonal temperature. Mass balance analysis indicated that macrophyte assimilation, sediment adsorption, and microbial transformation accounted for 10.31-41.74 %, 0.84-3.00 %, and 6.92-48.24 % removal of the inlet TN loading, respectively. Hydrophyte detritus decay induced alterations in physicochemical parameters while significantly increasing the N and P levels in the overlying water and sediment. Decay rates varied among macrophytes in the order of HV (0.00436 g day
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- 2023
4. Impact of biochar amendment on antibiotic removal and ARGs accumulation in constructed wetlands for low C/N wastewater treatment
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Fidelis Odedishemi Ajibade, Wan-Xin Yin, Awoke Guadie, Temitope Fausat Ajibade, Ying Liu, Mathieu Nsenga Kumwimba, Wen-Zong Liu, Jing-Long Han, Hong-Cheng Wang, and Ai-Jie Wang
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2023
5. Impact of Biochar Amended on Antibiotic Removal and Resistant Genes Accumulation in Constructed Wetlands for Low C/N Wastewater Treatment: Performance and Mechanism
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Fidelis Odedishemi Ajibade, Wanxin Yin, Awoke Guadie, Temitope Fausat Ajibade, Ying Liu, Mathieu Nsenga Kumwimba, Wen-Zong Liu, Jinglong Han, Hongcheng Wang, and Ai-Jie Wang
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
6. Performance of various fillers in ecological floating beds planted with Myriophyllum aquaticum treating municipal wastewater
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Mathieu Nsenga Kumwimba, Xuyong Li, Jinlou Huang, Diana Kavidia Muyembe, Mawuli Dzakpasu, and Edmond Sanganyado
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Environmental Engineering ,Nitrogen ,Environmental Chemistry ,Phosphorus ,Nutrients ,Wastewater ,Saxifragales ,Waste Disposal, Fluid ,Pollution ,Waste Management and Disposal ,Water Purification - Abstract
The performance of different suspended fillers (zeolite, drinking water treatment residual, biochar, woodchip and stereo-elastic packing) and their combinations in treating municipal wastewater in ecological floating beds (Eco-FBs) planted with Myriophyllum aquaticum was assessed. Six sets of enhanced Eco-FBs were developed to assess the individual and synergistic effects of combinations of the various fillers and microorganisms on nutrient elimination. The results demonstrated mean TN, NH
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- 2022
7. Roles of ammonia-oxidizing bacteria in improving metabolism and cometabolism of trace organic chemicals in biological wastewater treatment processes: A review
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Mathieu Nsenga Kumwimba and Fangang Meng
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Environmental Engineering ,010504 meteorology & atmospheric sciences ,Microorganism ,Heterotroph ,Cometabolism ,Wastewater ,010501 environmental sciences ,Waste Disposal, Fluid ,01 natural sciences ,chemistry.chemical_compound ,Ammonia ,Environmental Chemistry ,Organic Chemicals ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Pollutant ,Bacteria ,Chemistry ,Metabolism ,Biodegradation ,Pollution ,Biodegradation, Environmental ,Activated sludge ,Environmental chemistry ,Sewage treatment ,Oxidation-Reduction ,Water Pollutants, Chemical - Abstract
While there has been a significant recent improvement in the removal of pollutants in natural and engineered systems, trace organic chemicals (TrOCs) are posing a major threat to aquatic environments and human health. There is a critical need for developing potential strategies that aim at enhancing metabolism and/or cometabolism of these compounds. Recently, knowledge regarding biodegradation of TrOCs by ammonia-oxidizing bacteria (AOB) has been widely developed. This review aims to delineate an up-to-date version of the ecophysiology of AOB and outline current knowledge related to biodegradation efficiencies of the frequently reported TrOCs by AOB. The paper also provides an insight into biodegradation pathways by AOB and transformation products of these compounds and makes recommendations for future research of AOB. In brief, nitrifying WWTFs (wastewater treatment facilities) were superior in degrading most TrOCs than non-nitrifying WWTFs due to cometabolic biodegradation by the AOB. To fully understand and/or enhance the cometabolic biodegradation of TrOCs by AOB, recent molecular research has focused on numerous crucial factors including availability of the compounds to AOB, presence of growth substrate (NH4-N), redox potentials, microorganism diversity (AOB and heterotrophs), physicochemical properties and operational parameters of the WWTFs, molecular structure of target TrOCs and membrane-based technologies, may all significantly impact the cometabolic biodegradation of TrOCs. Still, further exploration is required to elucidate the mechanisms involved in biodegradation of TrOCs by AOB and the toxicity levels of formed products.
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- 2019
8. Nutrients retention of a series of small dam-impacted urban rivers in northern China
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Mathieu Nsenga Kumwimba, Linlin Bao, Zhishi Jie, Xuyong Li, Jinlou Huang, Wei wang, Xinzhu Li, Jingjun Su, Diana Kavidia Muyembe, Awoke Guide, and Mawuli Dzakpasu
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Process Chemistry and Technology ,Chemical Engineering (miscellaneous) ,Pollution ,Waste Management and Disposal - Published
- 2022
9. Removal of non-point source pollutants from domestic sewage and agricultural runoff by vegetated drainage ditches (VDDs): Design, mechanism, management strategies, and future directions
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Lunda Ilunga, Fangang Meng, Matthew T. Moore, Mathieu Nsenga Kumwimba, Wang Tao, Bo Zhu, Tang Jia Liang, and Oluwayinka Iseyemi
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Environmental Engineering ,Ditch ,Sewage ,Environment ,010501 environmental sciences ,Waste Disposal, Fluid ,01 natural sciences ,Environmental protection ,Environmental Chemistry ,Pesticides ,Drainage ,Waste Management and Disposal ,Nonpoint source pollution ,0105 earth and related environmental sciences ,Pollutant ,geography ,geography.geographical_feature_category ,business.industry ,Agriculture ,Phosphorus ,04 agricultural and veterinary sciences ,Pollution ,Wastewater ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Terrestrial ecosystem ,Water quality ,business ,Water Pollutants, Chemical - Abstract
Domestic wastewater and agricultural runoff are increasingly viewed as major threats to both aquatic and terrestrial ecosystems due to the introduction of non-point source inorganic (e.g., nitrogen, phosphorus and metals) and organic (e.g., pesticides and pharmaceutical residues) pollutants. With rapid economic growth and social change in rural regions, it is important to examine the treatment systems in rural and remote areas for high efficiency, low running costs, and minimal maintenance in order to minimize its influence on water bodies and biodiversity. Recently, the use of vegetated drainage ditches (VDDs) has been employed in treatment of domestic sewage and agricultural runoff, but information on the performance of VDDs for treating these pollutants with various new management practices is still not sufficiently summarized. This paper aims to outline and review current knowledge related to the use of VDDs in mitigating these pollutants from domestic sewage and agricultural runoff. Literature analysis has suggested that further research should be carried out to improve ditch characteristics and management strategies inside ditches in order to ensure their effectiveness. Firstly, the reported major ditch characteristics with the most effect on pollutant removal processes (e.g., plant species, weirs, biofilms, and substrates selection) were summarized. The second focus concerns the function of ditch characteristics in VDDs for pollutant removal and identification of possible removal mechanisms involved. Thirdly, we examined factors to consider for establishing appropriate management strategies within ditches and how these could influence the whole ditch design process. The current review promotes areas where future research is needed and highlights clear and sufficient evidence regarding performance and application of this overlooked ditch system to reduce pollutants.
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- 2018
10. Nitrogen/phosphorus behavior traits and implications during storm events in a semi-arid mountainous watershed
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Mathieu Nsenga Kumwimba, H.K.M. Mihiranga, Wei Wang, Yan Jiang, Xin Bao, Koshila De Silva, S. P. Nissanka, and Xuyong Li
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Hydrology ,geography ,Environmental Engineering ,Watershed ,geography.geographical_feature_category ,Nitrogen ,Drainage basin ,Sediment ,Phosphorus ,Storm ,Structural basin ,Pollution ,Rivers ,Environmental Chemistry ,Environmental science ,Subsurface flow ,Surface runoff ,Waste Management and Disposal ,Water Pollutants, Chemical ,Environmental Monitoring ,Total suspended solids - Abstract
Seasonal rainfall events reinforce the link between terrestrial and fluvial domains and are crucial for assessing hydrological control over riverine nutrient dynamics and pollutant source behaviors, especially in a semi-arid watershed. Taking the Qingshuihe river basin, a semi-arid mountainous basin in China, as an example, this paper investigated storm effects on riverine nitrogen (N) and phosphorus (P) dynamics (i.e. concentration, load, and composition changes) through continuous sampling of four storm events of the 2019 rainy season, including one small storm, two moderate storms, and a large storm. Pollutant sources and transport pathways were then examined over the storm sequence via hysteresis analysis. The results revealed a strong linkage between N/P dynamics and hydrological processes. Storm runoff caused a 6-fold increase in particulate-P (PP) and a 4-fold increase in ammonia-N (NH4-N) fluxes through four storms (most sensitive nutrients to storms). On average, PP shared 86% of P exports, and nitrate-N (NO3-N) contributed 79% of N exports. PP and NH4-N were delivered primarily from overland sources and transported by surface runoff. Nonetheless, mobilization of channel sediment reserves was also an important way of PP supply during storms. The results suggested groundwater as the principal NO3-N source in the watershed, and subsurface flow was important for NO3-N and total dissolved-P (TDP) delivery during storms. The large storm (>20 mm) often registered the highest N/P load exports. However, there were other influencing factors/processes on stormflow N/P dynamics in the semi-arid watershed, which complicate/override the effects of different storm magnitudes. Total suspended solids (TSS)/PP source availability and inter- and intra-storm export trends influenced P behaviors through storms. Moreover, impacts of mobilization processes on NO3-N behavior appeared over the storm sequence. These findings enhance our understanding of storm events induced N/P exports in water-scarce regions and provide references for water quality predictions and control in flood seasons.
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- 2021
11. Can vegetated drainage ditches be effective in a similar way as constructed wetlands? Heavy metal and nutrient standing stock by ditch plant species
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Tao Wang, Matthew T. Moore, Mathieu Nsenga Kumwimba, Bo Zhu, and Xuyong Li
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geography ,Biomass (ecology) ,Environmental Engineering ,geography.geographical_feature_category ,business.industry ,Ditch ,Sewage ,Wetland ,04 agricultural and veterinary sciences ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,01 natural sciences ,Nutrient ,Agronomy ,Wastewater ,Aquatic plant ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Ecosystem ,business ,0105 earth and related environmental sciences ,Nature and Landscape Conservation - Abstract
Agricultural runoff impacts rivers and lakes on a global scale, while in developing countries (e.g., China), rural domestic wastewater is often an additional source of pollution. Scholars and policy makers are now promoting the use of agricultural vegetated ditches (VDs) as a potential supplemental management practices for nutrients and pesticide reduction from agricultural sources; however, information on the efficacy of these systems for the treatment of rural wastewater loaded with nutrients and heavy metal(loid)s (HMLs) removal and standing stock (SS) in aquatic plants growing there is rare or unknown. These shortcomings in our understanding of these systems must be addressed if they are going to serve further as an effective tool for purifying rural domestic sewage laden with concentrations of HMLs. To address this knowledge gap, the present study deals with SS of ten HMLs in ten plant species growing in a VD receiving raw rural domestic wastewater, with the intention to revealing an appropriate period for ditch plant harvesting to maximize HM removal. Mean reduction efficiencies amount to TN (60.6%), NH4-N (63.3%), NO3-N (48.1%), TP (58.5%) and PO4-P (51.9%), with favorable treatment performance during the summer season. Concentrations of nutrients typically declined gradually with distance along the length of the VD. Furthermore, the annual average reduction amounted to Ni (50.6%), Cu (56.1%), Cr (63.3%), Zn (79.3%), Cd (67.5%), Pb (80.1%), As (60.3%), Fe (52.6%), Al (19.8%), and Mn (24.3%). Plant uptake and sediment retention were the major contributors for nutrient mitigation within the vegetated ditches, with subsequent bacterial interaction and transformation of pollutants. Accumulation of HMLs varied among species and plant parts. Overall, SSs of most HMLs in plant species were greater in either stems or roots than leaves, with maximum values recorded in SSs of Al, Fe, and Mn. Based on the seasonal fluctuation of the accumulated HMLs in different plant species, the approach of harvesting plant biomass in order to effectively target HMLs in August or early September is recommended. Overall, reported results suggest that VD is an effective ecosystem to mitigate HMLs and nutrients from raw rural domestic wastewater in a similar way as constructed wetlands, noting the potential incorporation into local best management practices.
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- 2021
12. Sequential detention pond-biogeochemical barrier-free water surface wetland system for effluent purification and river eutrophication control
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Jingjun Su, Wei Wang, Li Xinzhu, Xuyong Li, Zhishi Jie, Linlin Bao, Mathieu Nsenga Kumwimba, and Mawuli Dzakpasu
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Biogeochemical cycle ,geography ,geography.geographical_feature_category ,Process Chemistry and Technology ,Environmental engineering ,Wetland ,Sedimentation ,Nutrient ,Constructed wetland ,Environmental science ,Sewage treatment ,Safety, Risk, Reliability and Quality ,Eutrophication ,Waste Management and Disposal ,Effluent ,Biotechnology - Abstract
Discharge of phosphorus (e.g., PO4-P) and nitrogen (NO3-N) from the wastewater treatment facility (WWTF) effluent even at low occurrence (e.g., μg PO4-P L−1) could lead to eutrophication of receiving environments. Zhangjiakou city will host the international winter multi-sport event in 2022, which would probably yield a large amount of domestic WW and their associated contaminants in the water systems. To reveal the feasibility of an integrated surface flow constructed wetland (ISFCW) system for the purification of WWTF effluent, a field-scale ISFCW system was applied and operated in Zhangjiakou city. The ISFCW system consisted of a vegetated sedimentation pond (VSP) section followed by a biogeochemical barrier (BGB), and an SFCW. The purification performance of each purification component was monitored weekly over twelve months in terms of nutrient (N and P) removal. With the application of the ISFCW system, a total of 48.7, 59.4, 50.0, 54.9, and 60.2 % removal of TN, NH4-N, NO3-N, TP, and PO4-P was achieved in the summer period. Further analysis demonstrated that the contributions of VSP, BGB and FTW to all analyzed nutrient removal were 3–78 %. The key removal processes appeared to be biological and physicochemical pathways, and the integration of the VSP, BGB and SFCW enhanced the purification capacity of the system. Overall, the ISFCW system was effective at reducing nutrients from WWTF effluent and could consequently be used locally and in other similar mountain-river systems. Additional optimization of operating conditions could result in an enhanced reduction of nutrients.
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- 2021
13. Large-scale hybrid accidental urban wetland for polluted river purification in northern China: Evidence and implications for urban river management
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Jingjun Su, Mathieu Nsenga Kumwimba, Xinzhu Li, Linlin Bao, H.K.M. Mihiranga, L.H.D.K.U. De Silva, Xuyong Li, and Wei Wang
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Pollutant ,geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Detention basin ,Environmental engineering ,Soil Science ,Wetland ,Plant Science ,010501 environmental sciences ,Sedimentation ,01 natural sciences ,Nutrient ,Weir ,Environmental science ,Eutrophication ,Effluent ,0105 earth and related environmental sciences ,General Environmental Science - Abstract
Hybrid accidental urban wetlands (HAUWs) are expected to be a potential low-cost and highly efficient alternative means of minimizing pollutant loads from municipal areas as compared to the single-stage system being used. These unexpected HAUWs are created not through deliberate restoration, but as a result of water infrastructure decisions by local government. However, information on the long-term purification efficiency of large-scale HAUW improving eutrophic urban rivers is largely unexplored. An in-situ HAUW system consisting of a rubber dam, detention pond, accidental urban wetland, and overflow weir was evaluated at the field-scale for the purification of a eutrophic urban river in Zhangjiakou City, Hebei Province. The results for seven months of operation demonstrated that the effluent TP and NH4-N in the HAUW system could comply with the Grade III of Chinese National Surface Water Quality Standards. Average removal efficiencies for TN, NH4-N, NO3-N, TP, and PO4-P in the summer–autumn period of 52.6, 65,8, 56.6, 51.4, 58.2 and 88.3%, respectively, were recorded. These removal efficiencies were 59.4, 61.5, 65.6, 57.1, 59.4 and 65.7% higher than the respective values in the spring period. Furthermore, removal rates of nutrients were highly sensitive to temperature and showed seasonal trends. Further analysis showed that, with the application of the HAUW system, a total of 92.1, 69.5, 57.3, 37.8, 33.2, 12.4, 14.5, 7.3, 3.4% removal of Al, Mn, Cd, Pb, Zn, Ni, Fe, Ni, and As was achieved. Mean removal rates of TN, NH4-N, NO3-N, TP, TDP, PO4-P in the summer–autumn period were 2- 5 times higher than in those recorded in the early spring period. These results suggest that a variety of contaminant elimination mechanisms were offered by the HAUW, including enhanced hydraulic resistance, sedimentation, plant assimilation, microbial biofilm growth on roots’ surface and the HAUW design. Overall, this study demonstrated that the monitored HAUW could be another feature of the urban landscape that could help minimize pollutant loading to surface urban water bodies. This function is especially true in warm periods, in a similar way as natural wetlands or purposely built constructed wetlands. Nonetheless, managing these accidental treatment systems to maximize pollutant dissipation in the long-term would necessitate appropriate management strategies.
- Published
- 2021
14. Plant soaking decomposition as well as nitrogen and phosphorous release in the water-level fluctuation zone of the Three Gorges Reservoir
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Mathieu Nsenga Kumwimba, Liwei Xiao, Bo Zhu, and Shiwei Jiang
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China ,Nutrient cycle ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Nitrogen ,chemistry.chemical_element ,010501 environmental sciences ,01 natural sciences ,Nutrient ,Botany ,Environmental Chemistry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Total organic carbon ,biology ,Chemistry ,Phosphorus ,Water ,Plants ,Cynodon dactylon ,biology.organism_classification ,Pollution ,Decomposition ,Floods ,Horticulture ,Eutrophication - Abstract
The operating scheme of the Three Gorges Reservoir results in a summer drought in the water-level fluctuation zone during which plants grow vigorously. In the winter inundation season, soaking plants may decompose and release nutrients resulting in water quality deterioration. This study quantifies the contributions of the underwater decomposition of nine dominant plant species in the water-level fluctuation zone to nutrient release. The in-situ litterbag technique was used to study for soaking decomposition over 200days. All soaking plant species decomposed rapidly at an average rate of 1.99±0.33%d-1 in the early stage of soaking (0 to 30days) and at an average rate of only 0.07±0.04%d-1 in the later stage (30 to 200days). After 200days of soaking, the nine plant species released an average of 312.40±39.97gkg-1 organic carbon, 6.71±4.29gkg-1 of nitrogen and 2.25±1.25gkg-1 of phosphorus. A positive relationship was found between soaking plant decomposition rates and initial C/N ratios of 25 to 50, and a negative relationship where the C/N ratios were between 50 and 100. The amounts of total nitrogen or total phosphorus released were significantly negatively correlated with the initial C/N or C/P ratios of the plants. Among the studied plant species, Xanthium sibiricum Patr ex Widder showed high level of nutrient release via soaking decomposition. In contrast, Cynodon dactylon (Linn.) Pers. and Polygonum hydropiper exhibited low levels of nutrient release and are recommended as suitable species for the ecological restoration of the water-level fluctuation zone. Our results demonstrate that after 200days of soaking plant decomposition, the loadings of total organic carbon, nitrogen, and phosphorus in the water-level fluctuation zone of the Three Gorges Reservoir were 2942.1, 81.1, and 24.7kgha-1, respectively and therefore could potentially damage the aquatic environment of the reservoir.
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- 2017
15. How to enhance the purification performance of traditional floating treatment wetlands (FTWs) at low temperatures: Strengthening strategies
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Ammara Batool, Mathieu Nsenga Kumwimba, and Xuyong Li
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Pollution ,Environmental Engineering ,010504 meteorology & atmospheric sciences ,Nitrogen ,media_common.quotation_subject ,Wetland ,Portable water purification ,010501 environmental sciences ,Waste Disposal, Fluid ,01 natural sciences ,Water Purification ,Nutrient ,Water column ,Humans ,Environmental Chemistry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,media_common ,Pollutant ,geography ,geography.geographical_feature_category ,Temperature ,Environmental engineering ,Macrophyte ,Plant Breeding ,Biodegradation, Environmental ,Wetlands ,Environmental science ,Water quality ,Water Pollutants, Chemical - Abstract
Pollution of freshwaters poses a major threat to water quality and human health and thus, nutrients have been targeted for mitigation. One such control measure is floating treatment wetlands (FTWs), which are designed to employ vigorous macrophytes above the water surface and extensive plant root system below the water surface to increase plant uptake of nutrients. The efficacy of FTWs in purifying different water systems has been widely studied and reviewed, but most studies have been performed in warm periods when FTW macrophytes are actively growing. In low-temperature conditions, the metabolic processes of macrophytes and microbial activity are usually weakened or reduced by the winter months and are not actively assimilating pollutants. These circumstances hamper the purification ability of FTWs to perform as designed. Furthermore, decayed macrophytes could release pollutants into the water column. Hence, this paper aimed to systematically summarize strategies for use of enhanced FTWs in eutrophic water improvement at low temperature and identify future directions to be addressed in intensifying FTW performance in low-temperature conditions. Low-temperature FTW show variable nutrient removal efficiencies ranging from 22% to 98%. Current amendments to enhance FTW purification performance, ranging from direct strategies for internal components to indirect enhancement of external operation environments encourage the FTW efficacy to some extent. However, the sustainability and sufficiency of water purification efficiency remain a great challenge. Keeping in mind the need for optimizing the FTW components and dealing with high organic and inorganic chemicals, future research should be carried out at the large field-scale and focus on macrophyte- benthos- microorganism synergistic enhancement, breeding of cold-tolerant macrophytes, and combination of FTWs with many strategies, as well as rational design and operational approaches under cold conditions.
- Published
- 2021
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