13 results on '"Yingwei Ai"'
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2. The formation of small macro‐aggregates induces soil organic carbon stocks in the restoration process used on cut slopes in alpine regions of China
- Author
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Bocong Huang, Mengke Zhu, Zongyang Liu, Meihua Sheng, Mei Chen, Qinqing Yang, Yuxuan Yang, and Yingwei Ai
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Soil Science ,Environmental Chemistry ,Development ,General Environmental Science - Published
- 2022
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Catalog
3. Time‐dependent effects of ecological rehabilitation on soil phosphorus fractions on cut slopes in the mountains of Southwest China
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Xiaoyan Ai, Xiaosu Tian, Siqian Yang, Shenghao Ai, Xue Jiang, Meihua Sheng, and Yingwei Ai
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Soil Science ,Environmental Chemistry ,Development ,General Environmental Science - Published
- 2023
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4. Effects of Different Highway Slope Disturbance on Soil Bulk Density, pH, and Soil Nutrients
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Yingwei Ai, Xue Jiang, Siqian Yang, Jingyan Yang, Xiaoyan Ai, Chengmin Huang, Shenghao Ai, and Mengke Zhu
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Disturbance (geology) ,Soil nutrients ,Soil acidification ,Soil science ,02 engineering and technology ,010501 environmental sciences ,021001 nanoscience & nanotechnology ,complex mixtures ,01 natural sciences ,Pollution ,Bulk density ,Volume (thermodynamics) ,Land degradation ,Environmental Chemistry ,Degradation (geology) ,Environmental science ,0210 nano-technology ,human activities ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
Soil is inevitably affected by highway construction, resulting in a large volume of bare soil exposed to degradation. As an increasingly important and demanding area, identifying and assessing soil... more...
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- 2021
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5. Soil N availability drives the shifts of enzyme activity and microbial phosphorus limitation in the artificial soil on cut slope in southwestern China
- Author
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Jia Liu, Meihua Sheng, Xiaoyan Ai, Chaonan Li, Yingwei Ai, Shenghao Ai, and Haijun Liao
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Biomass (ecology) ,Health, Toxicology and Mutagenesis ,Phosphorus ,chemistry.chemical_element ,General Medicine ,010501 environmental sciences ,01 natural sciences ,Pollution ,Nitrogen ,Agronomy ,chemistry ,Slope stability ,Soil water ,Environmental Chemistry ,Environmental science ,Ecotoxicology ,Ecosystem ,Restoration ecology ,0105 earth and related environmental sciences - Abstract
The construction of highways in the subalpine mountains generates many cut slopes. Currently, the restoration of cut slope mainly focuses on the aboveground landscapes and slope stability. Yet, it remains elusive about the belowground ecosystem functions at the early stage of restoration. In this study, we evaluated the belowground ecosystem functions of cut slopes that had been restored approximately 3 years using soil enzymatic activities, microbial biomass, and stoichiometry as the proxies. The results indicated that the phenol oxidase activity was higher in cut slopes, while the activities of β-1,4-glucosidase, β-1,4-N-acetylglucosaminidase, leucine aminopeptidase, and acid phosphatase were lower in cut slope soils compared with natural soils. Soil nitrogen availabilities (total and/or ammonium nitrogen) showed high negative correlations with the phenol oxidase activity and positive correlations with the activities of almost all other enzymes. These results suggested that soil nitrogen was the key factor in driving the shifts of enzymatic activities across two types of soils. Moreover, we found the imbalance of soil nutrients in cut slope soils, especially the carbon vs. nitrogen and the nitrogen vs. phosphorus. By applying the vector analysis, we found that the vector A values were more than 45° in all samples, suggesting that microbial phosphorus limitation occurred in both cut slope and natural soils. These findings suggested that maintaining the balance of soil nutrient supplies is important to the recovery of the below-ground ecosystem functions at the early restoration stage of cut slopes. This study provided new insights into designing the ecological restoration strategies for cut slopes by considering the belowground ecosystem functions. more...
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- 2021
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6. Effects of frame beam on structural characteristics of artificial soil on railway cut‐slopes in southwestern China
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Shenghao Ai, Xiaoqiao Su, Yingwei Ai, Xue Jiang, Meihua Sheng, Zhiyu Huang, Siqian Yang, and Xiaoyan Ai
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Soil structure ,Frame (networking) ,Soil Science ,Environmental Chemistry ,Environmental science ,Geotechnical engineering ,Development ,China ,Beam (structure) ,General Environmental Science - Published
- 2020
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7. How backfill soil type influencing on Cd and Pb migration in artificial soil on railway rock-cut slopes
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Jiao Chen, Yingwei Ai, Xiaoming Luo, Xin Liu, Wei Li, Zhen Kang, Shu Yang, Zhaoqiong Chen, and Shihong Zhong
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Environmental Engineering ,010504 meteorology & atmospheric sciences ,Soil science ,Soil classification ,010501 environmental sciences ,Soil type ,01 natural sciences ,Pollution ,Soil quality ,Rock fragment ,Erosion ,Environmental Chemistry ,Environmental science ,Revegetation ,Soil fertility ,Surface runoff ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
Cadmium (Cd) and lead (Pb) that accumulates in the surface soil of railway rock-cut slopes may migrate to nearby croplands. It is important to determine whether backfill soil type influences the transportation of Cd and Pb in the surface soil. Representative rock-cut slopes, backfill soil of 100% rock fragments, 100% agricultural soil, and 50% agricultural soil and 50% rock fragments (n = 2 for each type) were selected. The pollution and migration levels of Cd and Pb and the soil quality and erodibility were investigated. The soil concentrations of Cd and Pb on the rock-cut slopes were much higher than those of China soil quality standard. Soil erosion was the most important factor that influences the migration of Cd and Pb in the slopes. Increasing the percentage of agricultural soil in the backfill soil resulted in decreasing the diffusion of Cd and Pb by reducing soil erosion. The backfill soil affected the soil quality and erosion durability, which, in turn, affected the transportation of Cd and Pb in the runoff. The soil quality index (SQI) accurately reflects the soil quality and can serve as an indicator of the migration of Cd and Pb on the surface soil of the slopes. Therefore, agricultural soil was more appropriate to use as a backfill soil in slope revegetation practice than was the rock fragment, which was helpful for decreasing the environmental risk of Cd and Pb on the slopes. more...
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- 2019
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8. Effects of antimony contamination on bioaccumulation and gut bacterial community of earthworm Eisenia fetida
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Juan Li, Jian Long, Yingwei Ai, and Bocong Huang
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Antimony ,Eisenia fetida ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,0211 other engineering and technologies ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Soil ,Environmental Chemistry ,Animals ,Soil Pollutants ,Oligochaeta ,Waste Management and Disposal ,0105 earth and related environmental sciences ,021110 strategic, defence & security studies ,biology ,Xanthomonadaceae ,Earthworm ,Contamination ,biology.organism_classification ,Pollution ,Bioaccumulation ,Gastrointestinal Microbiome ,chemistry ,Environmental chemistry ,Soil water ,Bacteria - Abstract
Antimony (Sb) contamination has brought great environmental problems to the surrounding soils. However, few studies focused on the response of bacterial communities in earthworm gut to Sb. Eisenia fetida was cultured in four soils with Sb contents (5,25,50,100 mg•kg−1) to investigate the distribution of Sb species in earthworm gut and the response mechanism of bacterial communities to Sb contamination. The results showed that Sb accumulated in the gut and tissues of earthworms, and the mortality of earthworms showed a dose-response relationship with the increase of Sb content. Sb(III) and Sbexe were the major species in gut, whereas Sb(V) and Sbsrp were predominant in surrounding soil. There were significant differences in bacterial diversity between earthworm gut and soil, but there was no significant between the two with different Sb content. The network constructed by gut bacterial community of earthworm was less stable and more sensitive to Sb species than that in soil. Sb(III) had the greatest influence on the gut bacterial community of earthworm, which not only directly affected the community through Xanthomonadaceae, Rhodomicrobiaceae and Anaerolineaceae, but also indirectly influenced through Chthoniobacteraceae. This study fills a research gap on the effect of Sb contamination on the gut bacterial community of earthworm. more...
- Published
- 2021
9. Stabilization of vanadium in calcareous purple soil using modified Na-bentonites
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Wen-yan He, Jia Li, Yingwei Ai, Jin-xin Li, and Jin-yan Yang
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Renewable Energy, Sustainability and the Environment ,Chemistry ,020209 energy ,Strategy and Management ,Soil organic matter ,Soil acidification ,05 social sciences ,02 engineering and technology ,Building and Construction ,Soil contamination ,Industrial and Manufacturing Engineering ,Ferrous ,Environmental chemistry ,050501 criminology ,0202 electrical engineering, electronic engineering, information engineering ,Rozenite ,Acid rain ,Calcareous ,Water content ,0505 law ,General Environmental Science - Abstract
Stabilization technique is regarded effective to control heavy metal pollution in soil. Traditional stabilizers have raised concerns about soil acidification/alkalization, or the stable effectiveness in a long-term. To stabilize vanadium (V) in calcareous purple soil in an environmentally friendly way, Na-bentonite (Na–B) modified by tea polyphenol (TP-B), by FeSO4 (Fe–B), and by TP and FeSO4 (TP-Fe-B) were prepared, characterized and assayed. The tea polyphenol modification loaded –CH2 on TP-B and TP-Fe-B, and ferrous modification introduced rozenite to Fe–B and TP-Fe-B, which supplied reaction sites to V. The effects of stabilizer dosage, soil moisture, and initial V concentration in soil were considered to ascertain the optimum stabilization conditions. Applying 5 wt% Fe–B into the 696.63 mg V/kg soil at 60% field water capacity soil yielded stabilization rates of 19.1%, 37.7% and 20.5% for water-extractable V, bioavailable V, and pentavalent V, respectively. Further study was conducted to assess the stable period of the passivation effect and the stability of the passivation effect under acid rain. The stabilization effect remained functional for at least 4 weeks after TP-B, Fe–B, and TP-Fe-B application. Notably, adding Fe–B could reduce the risk of V transfer from soil into the aquatic environment under acid rain. However, Fe–B resulted in a decrease in soil organic matter and alkali-hydrolyzed nitrogen, thus fertilization should be considered. These results proved that Fe–B was a potential stabilizer for V contaminated soil even under acid rainfall. more...
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- 2020
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10. Artificial soil nutrient, aggregate stability and soil quality index of restored cut slopes along altitude gradient in southwest China
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Yingwei Ai, Xiaoyan Ai, Mengke Zhu, Xue Jiang, Ruirui Li, Jiao Chen, Siqian Yang, and Shenghao Ai
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China ,Environmental Engineering ,Nitrogen ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,chemistry.chemical_element ,Soil science ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,law.invention ,Soil ,Sieve ,Altitude ,law ,Environmental Chemistry ,0105 earth and related environmental sciences ,Aggregate (composite) ,Phosphorus ,Public Health, Environmental and Occupational Health ,Nutrients ,General Medicine ,General Chemistry ,Pollution ,Soil quality ,Carbon ,020801 environmental engineering ,Soil structure ,chemistry ,Potassium ,Environmental science ,Geometric mean ,Environmental Monitoring - Abstract
In the subalpine mountainous region of southwest China, the artificial soil properties of restored cut slopes along the altitude gradient were studied, including available nitrogen (AN), available phosphorus (AP), available potassium (AK), urease (UR), sucrase (SC), protease (PR), catalase (CAT), texture, and aggregate stability of soil. Soil aggregatet stability by mean weight diameter (MWD), geometric mean diameter (GMD), structure failure rate (P), index of unstable aggregates (IUA) and area difference of dry and wet sieve cumulative distribution curve (ΔS) were measured and analyzed. It was found that available soil nutrients, UR, and CAT activities increased initially and then decreased, but the texture of soil was finer, and aggregate structure tended to be more stable along with an increase in the altitude gradient. The soil aggregate stability index that MWD, GMD, P, IUA, and ΔS indicated that the higher the altitude, the stability of soil aggregates was better. Principal component analysis (PCA) was used to determine the soil quality index (SQI). The obtained results from this study showed that the artificial soil quality of the cut slopes was better at a higher altitude compared to a lower altitude. These results provide a reference for the improvement of artificial soil properties of cut slopes and their quality in the future. It is necessary to pay attention to the soil quality management at a low-altitude area and reform the soil nutrients, enzyme activities, and soil structure for the restored cut slopes in the mountainous subalpine highway of southwest China. more...
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- 2020
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11. Effects and mechanisms of revegetation modes on cadmium and lead pollution in artificial soil on railway rock-cut slopes
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Xiaoming Luo, Zhaoqiong Chen, Shihong Zhong, Xin Liu, Jingyao Chen, Jiao Chen, and Yingwei Ai
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Environmental Engineering ,chemistry.chemical_element ,010501 environmental sciences ,01 natural sciences ,Soil ,Environmental Chemistry ,Soil Pollutants ,Revegetation ,Waste Management and Disposal ,Environmental Restoration and Remediation ,0105 earth and related environmental sciences ,Pollutant ,Cadmium ,Sediment ,04 agricultural and veterinary sciences ,Vegetation ,Pollution ,Biodegradation, Environmental ,chemistry ,Agronomy ,Lead ,Soil water ,040103 agronomy & agriculture ,Erosion ,0401 agriculture, forestry, and fisheries ,Environmental science ,Surface runoff ,Environmental Monitoring - Abstract
Artificial soil on railway rock-cut slopes may be considerably contaminated with cadmium (Cd) and lead (Pb), which may migrate to nearby croplands and pose substantial risks to human and animal health. We investigate the influence of three types of revegetation modes - herbs (HS); herbs and shrubs (HSS); and herbs, shrubs, and trees (HSTS) - on the transportation of these heavy metals in soils. Six representative rock-cut slopes were chosen, and the vegetation, pollutant concentration, phytostabilization, and simulated rainfall were investigated. The results indicated that Cd posed a considerable ecological risk, while Pb posed a low ecological risk in the artificial soil. The erosion of artificial soil on the slopes played a primary role in the migration of Cd and Pb, because 87-91% of Cd and 85-89% of Pb was lost in sediments. Revegetation modes significantly affected the transportation of Cd and Pb. HSTS controlled a lot of Cd in their dominant plants among the three revegetation modes. HSTS not only decreased enrichment factor (EF) and ecological risk (Er) values of Cd in the soils, but also decreased runoff, sediment and cumulative migrated Cd and Pb. The relationships among multi-factors were analyzed by stepwise mediation effect test and the results indicated that root weight density, aboveground biomass and immobilization of dominant plants for Cd and Pb were important direct factors which influenced the transportation of Cd and Pb. Overall, HSTS has proven to be beneficial in controlling the migration of Cd and Pb to croplands near the slopes and reducing their environmental risk. These results can offer a tested and implementable solution for mitigating the risks posed by these pollutants around the quickly expanding railways in the study region. more...
- Published
- 2018
12. Distribution and phytoavailability of heavy metal chemical fractions in artificial soil on rock cut slopes alongside railways
- Author
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Yingwei Ai, Chen Fang, Kexiu Wang, Zhiyu Huang, Jingyao Xiao, Wei Li, Zhaoqiong Chen, Chunlin Li, and Shui Liu
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Festuca ,Environmental Engineering ,Environmental remediation ,Health, Toxicology and Mutagenesis ,Fraction (chemistry) ,Metal ,Environmental Chemistry ,Soil Pollutants ,Organic matter ,Revegetation ,Waste Management and Disposal ,Poa ,Railroads ,chemistry.chemical_classification ,Leucaena leucocephala ,biology ,Waste management ,Fabaceae ,Phosphorus ,Contamination ,Hydrogen-Ion Concentration ,biology.organism_classification ,Pollution ,Biodegradation, Environmental ,chemistry ,Lead ,Bioaccumulation ,Environmental chemistry ,visual_art ,visual_art.visual_art_medium ,Cadmium - Abstract
Artificial soil is often sprayed onto cut slopes alongside railroad tracks to promote revegetation. This study evaluated the heavy metal content and the distribution of heavy metal chemical fractions in the soil, as well as the uptake of heavy metals by plants. The soil at four sites was determined to be considerably contaminated with Cd and Pb. The concentrations of Cd and Pb increased with the length of time the railway had been in use and decreased further away from the railway tracks. Pb primarily existed in reducible form but as residual fractions, whereas Cd was predominantly in exchangeable form. A correlation analysis indicated that pH, organic matter, and total phosphorus levels were important factors affecting the distribution of the heavy metal chemical fractions. The amounts of exchangeable Pb and Cd in the soil were highly correlated with their amounts in the plants sampled, indicating that the exchangeable fraction is a better indication of heavy metal phytoavailability than the total amount of heavy metals in the soil. Bioaccumulation and translocation factors indicated that Indigofera amblyantha had moderate tolerance and bioaccumulation capability for Pb, as did Leucaena leucocephala for Cd. These two plant species can serve as ideal slope remediation plants. more...
- Published
- 2013
13. Heavy metal contamination in soil alongside mountain railway in Sichuan, China
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Guo-Yong Fu, Yingwei Ai, Hao Liu, Yuan-Bin Zuo, Xia Yang, Yan-Hua Yu, and Li-Ping Chen
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Pollution ,China ,media_common.quotation_subject ,Climate ,Mineralogy ,chemistry.chemical_element ,Management, Monitoring, Policy and Law ,Dispersion (geology) ,Metals, Heavy ,Humans ,Soil Pollutants ,Organic matter ,Railroads ,General Environmental Science ,media_common ,chemistry.chemical_classification ,Cadmium ,Geography ,Soil organic matter ,General Medicine ,Soil quality ,Soil contamination ,chemistry ,Environmental chemistry ,Enrichment factor ,Environmental Monitoring - Abstract
Heavy metal concentration in soil was investigated at three sites with different topography (cut slope, flat and embankment) within the vicinity of Chengdu-Kunming railway in Sichuan, China. Surface soil was sampled at certain distances from the track at each site and was analyzed for Cu, Mn, Pb, Zn, Cd by atomic absorption spectrometry. Cu, Cd and Zn concentrations in some soil exceeded the thresholds for non-polluted soil following the soil quality standard set by the State Environmental Protection Agency of China. Compared to local background values, the highest enrichment factor values of Cu, Mn, Zn and Cd were 2.7, 3.4, 3.7 and 7.7, respectively, indicating a moderate or significant enrichment of these metals in soil closest to the railway. Pb showed little accumulation with the EF values generally nearer 1 at the chosen sites. Topography profile was found to influence metal levels and distribution in soil alongside railway. At the cut slope site, Mn, Zn, Cd showed the highest concentrations and the smallest dispersion distance of 2 m, while Cu showed further dispersion distance of 25 m due to a main Cu emission source, the head-over traction cable, being located higher than any other metal emission source (wheels and tracks). Heavy metal concentrations decreased conversely as compared to distance from the track, peak values occurring at locations closest to the tracks, whilst embankment site soil Cd concentrations peaked at distances of 25 m. Significant correlation was found amongst Mn, Cu, Zn and Cd, which indicates that these metals have the same anthropogenic origin there. Organic matter content had no significant correlation to the elements Mn, Cu and Zn, which implies relatively high mobility to those metals. more...
- Published
- 2007
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