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The basin economy is essential in China's high-quality development, which brings prodigious economic and social benefits. However, high industrialization and urbanization led to a significant escalation in water pollution within basins. The achievement of synergistic control of water environment pollution at the basin scale has emerged as a primary goal for governmental departments in developing environmental policies. This study constructs a "four-in-one" basin's water environment regulation system comprising four categories: total, quality, project, and governance. Further, the spatial spillover effects of water environment pollution control in 27 Chinese provincial-level administrative regions spanning key river basins were analyzed. This study aims to provide evidence from China on the transfer of water pollution in basins worldwide. The results indicate the following conclusions: (1) A consistent upward trend in the environmental regulations and water environment pollution indexes across all provinces in the basin. Compared to 2006, in 2018, the mean value of the basin environmental regulation index was 0.21, which is an increase of 23.5%, and the mean value of the water environmental pollution index was 0.83, which is an increase of 29.7%. (2) Whether in the basin's upper, middle, or lower reaches, the relationship between environmental regulations and water pollution follows a "U"-shaped pattern, with thresholds of 0.318, 0.331, and 0.390, respectively. (3) Under the neighbor weight matrix and water flow distance weight matrix, the impact coefficient of the water environment pollution index on the surrounding areas is significantly positive, implying that the implementation of local environmental policies will radiate to the neighboring areas in the short term and bring positive governance effects. (4) Regarding the time-lag effect, it is observed that the lag term associated with the water environment pollution index exhibits a statistically significant positive relationship. This finding suggests that the pollution of the water environment within the basin follows a cumulative and continuous pattern. (5) It is noted that long-term environmental regulation measures do not contribute favorably to the amelioration of water pollution in the neighboring regions. This implies the presence of a characteristic neighboring avoidance effect. [ABSTRACT FROM AUTHOR]

The urban water environment is seriously affected by human activities. Rivers in highly industrialized areas, which often carry various types of industrial pollutants, such as metals and nutrients, are especially affected. In this study, the water quality of the Pi River, an industrial base that flows through Chengdu, a large city in Southwest China, was tested for one year. Heavy metal concentrations in the water, sediment, and macrobenthic and algal communities in the river were examined. The water pollution index (WPI) and trophic level index (TLI) were employed to measure the water pollution degree and eutrophication status, respectively. The Shannon—Wiener index (H') and Margalef's index (dM) were determined to represent the diversity and richness of macroinvertebrates. The principal component analysis (PCA) was employed to define the main heavy metal influencing factors in the Pi River. Our study showed that the eutrophication status increased with spatial change, and the eutrophication status was the most serious in the downstream reach, which was moderately eutrophic. The water body of the Pi River was seriously polluted by heavy metals, and the content of chromium (Cr) in the sediment and cadmium (Cd) in the water/sediment was far beyond the prescribed limit. In addition, we found that Cd had a serious impact on both the benthic and algal communities, and the benthic community structure was completely changed, destroying the original aquatic environment. We explored the mechanisms of the influence of Cd on aquatic fauna, and this information is of great significance for the future conservation of industrial urban rivers. In this study, the spatial–temporal variations in water quality and aquatic communities revealed the pollution status of a river flowing through industrial areas, which provided a basis for future river conservation and restoration. [ABSTRACT FROM AUTHOR]

The destruction of civil and industrial objects in Ukraine caused by a decade-long armed conflict, especially since February 2022, has led to extensive environmental pollution within the country, particularly in the waterways of the Black Sea basin. The consequences of these actions have also affected the state of the Black Sea, causing concern for the European Union and the global scientific community. Therefore, within the framework of the European program «Horizon Europe», funds were allocated for scientific research into the consequences of pollution in coastal water bodies and the Black Sea as a whole. In the 2023 «Horizon Europe» project competition, a proposal by an intergovernmental consortium of 7 scientific organizations from 5 countries was awarded the grant, including the State Institution «Scientific Hydrophysical Center of the National Academy of Sciences of Ukraine». The project aims to create effective monitoring and quality control strategies for water, as well as the implementation of innovative technologies to reduce the impact of pollutants on the ecosystems of the Black Sea. The application of research results is planned for the development of environmentally sound recommendations and strategies for the conservation of the marine environment. The project involves collaboration between countries to address pollution issues and study the Black Sea, as well as the development of scientific approaches to water resource management in the region. Special attention is given to the development of educational programs regarding the impact of military pollution on the water ecosystems of the Black Sea region. This article describes the localization, factors, and types of pollution in waterways and the Black Sea basin, the project’s structure, types of activities, and the investigated water bodies in Ukraine, as well as the participation of SI «Scientific Hydrophysical Center of NAS of Ukraine» as a project participant.

The Three Gorges Reservoir is the largest freshwater resource reservoir in China. The water environment security in the Three Gorges Reservoir area has a prominent position in the major national strategy for the protection of the Yangtze River. Based on the pressure–state–response (PSR) model, this study comprehensively considers the dangerousness of risk source, the sensitivity of risk receptors, and the acceptable level of regional environmental risk to construct the grading evaluation index system of water environment pollution risk. By using spatial statistical methods, including the variation coefficient method and cold–hot spot pattern analysis, the risk distribution of water environment pollution in the Chongqing section of the Three Gorges Reservoir area was comprehensively identified and evaluated by administrative units. The results showed that: (1) the number of risk sources was largest in Yunyang County and the number of risk receptors was largest in Wanzhou District. However, the distribution of high-risk pollution sources and high-sensitivity receptors was most intensive in the main urban area and surrounding areas of Chongqing, and the regional environmental risk acceptance level was the lowest. (2) The statistical results of risk source dangerousness and the risk receptor sensitivity index at the county level in the study area showed an aggregated distribution pattern, with hotspot areas concentrated in the main urban area of Chongqing and the surrounding area in the upper reaches of the reservoir area. Moreover, the acceptable level of risk in this area showed a cold spot area, while other regions basically showed a balanced distribution pattern without forming significant hot spot or cold spot areas. (3) The high-risk river section of water pollution in the reservoir area comprised five counties, including Jiulongpo District, Yubei District, Shapingba District, Yuzhong District and Nanan District; the middle-risk river section comprised six counties, including Changshou District, Beipei District, Jiangbei District, Dadukou District, Fuling District and Shizhu County; and the low-risk river sections were mainly distributed in the Jiangjin District in the upper reaches of the reservoir area and the middle and lower reaches of the northeast ecological area of Chongqing. Therefore, the acceptable levels of water pollution risk sources, receptors and regional environmental risks in the Chongqing section of the Three Gorges Reservoir area are unevenly distributed, showing an aggregated distribution pattern. The spatial distribution of water environment pollution risk is uneven, and the significant potential risk area is the functional core area of Chongqing, which is the critical area of water environment risk management in the future. [ABSTRACT FROM AUTHOR]

The status quo of the research on atrazine in water environment was described. The worldwide water pollution status of atrazine was summarized, and the toxic influences of atrazine on plants, animals and human beings were analyzed detailly. The treatment technologies for atrazine in the contaminated water were analyzed emphatically, and the advantages and disadvantages of these technologies were discussed. Furthermore, some suggestions for the treatment research of atrazine in contaminated water environment were proposed for pollution control direction in the future. [ABSTRACT FROM AUTHOR]

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Recent years, water pollution accidents have happened frequently in China. The safety of drinking water is attracting more and more attention. Most of the Beijiang River Basin is in Guangdong province of China. It flows through Shaoguan, Qingyuan and Foshan cities, which take it as their source water. The three cities not only have a large population density but also have well-developed industry and agriculture as well as many factories and mines, and the pollution accidents of water source occur easily. Risk assessment of watershed water quality is very important not only for drinking water safety but also for basin environmental management policy. Based on the analytic hierarchy process and fuzzy logic, the environmental risk assessment index system of the Beijiang River Basin is constructed, and the environmental risk status of the Beijiang River Basin is evaluated. The results show that the comprehensive risk level of Beijiang River Basin is at a medium level, and the pressure of pollutant emission is relatively high. Among the Beijiang River Basin, the environmental risk assessment values of Xinan street in Sanshui District and Jiujiang town in Nanhai District are at comparatively high level. [ABSTRACT FROM AUTHOR]

Preparation of calibration curves is a critical step for large-scale quantification. However, this procedure is time-consuming, labor intensive. Herein, a novel isotopologue multipoint calibration (IMC) strategy, was proposed and demonstrated for the simultaneous quantitation of 120 pesticides and 83 veterinary drugs in surface water samples using Liquid Chromatography-High Resolution Mass Spectrometry (LC-HRMS). In this strategy, the natural isotopic distribution was used to generate external calibration curves, eliminating the need of analyst's adjustment and many sets of chemical standard solutions required in external calibration curves. Additionally, this strategy was comprehensively validated, and the results indicated this strategy had better performance in both accuracy and precision, fully meeting the requirements for the quantitative analysis. Interestingly, for the samples with high concentration beyond the upper limit of quantitation, the IMC strategy could avoid samples dilution by monitoring the less abundant isotopic channels. Furthermore, the IMC method was successfully applied in the surface water samples collected from Anhui province, China. Among which, sulfamethoxazole and imidacoprid were the main contributors. In conclusion, we present a promising LC-HRMS strategy for the accurate quantitation of small molecules, which has a potential application in food and environmental analysis. [Display omitted] • Isotopologue multipoint as a novel calibration strategy using LC-HRMS is presented. • The strategy was used to quantitate 120 pesticides and 83 veterinary drugs in water. • The strategy simplifies the preparation of calibration curves and sample dilution. [ABSTRACT FROM AUTHOR]

Hydrotalcite and its calcination product were used to treat pure water spiked with various concentrations of boron and geothermal water containing boron as a major undesirable element. The kinetics process of boron sorption by uncalcined hydrotalcite is controlled by the diffusion of boron from bulk solution to sorbent-solution boundary film and its exchange with interlayer chloride of hydrotalcite, whereas the removal rate of boron by calcined hydrotalcite rests with the restoration process of its layered structure. The results of isotherm sorption experiments reveal that calcined hydrotalcite generally has much stronger ability to lower solution boron concentration than uncalcined hydrotalcite. The combination of adsorption of boron on the residue of MgO-AlO solid solution and intercalation of boron into the reconstructed hydrotalcite structure due to 'structural memory effect' is the basic mechanism based on which the greater boron removal by calcined hydrotalcite was achieved. As 15 geothermal water samples were used to test the deboronation ability of calcined hydrotalcite at 65 °C, much lower boron removal efficiencies were observed. The competitive sorption of the other anions in geothermal water, such as HCO, SO, and F, is the reason why calcined hydrotalcite could not remove boron from geothermal water as effectively as from pure boron solution. However, boron removal percents ranging from 89.3 to 99.0 % could be obtained if 50 times of sorbent were added to the geothermal water samples. Calcined hydrotalcite is a good candidate for deboronation of geothermal water. [ABSTRACT FROM AUTHOR]

In this paper, the water quality of the Xixi Wetland was evaluated and the characteristics of water pollution were described according to the survey data. Based on the status of water quality and its functional requirements as an urban wetland, biological-ecological countermeasures were suggested. The experimental use of ecological technologies, such as artificial wetlands, ecological aquiculture and artificial floating island, were done in several fish ponds in the Xixi Wetland. Water monitoring results show that the quality of the treated water has improved significantly and the measures to purify the eutrophic water in the wetland have been effective. [ABSTRACT FROM AUTHOR]

Wang, X.Y.; Zhao, D.S., and Xu, Y., 2020. Threshold effect of industrial structure upgrading on water environment pollution in China. In: Bai, X. and Zhou, H. (eds.), Advances in Water Resources, Environmental Protection, and Sustainable Development. Journal of Coastal Research, Special Issue No. 115, pp. 518-521. Coconut Creek (Florida), ISSN 0749-0208. It is an important way for china to carry out sustainable development construction at present to comprehensively promote industrial transformation and provide new impetus for building a harmonious development of economy and environment through the optimization and upgrading of industrial structure. In this paper, a static panel threshold model is constructed to study the nonlinear relationship between the upgrading of industrial structure and water pollution. The results show that: (1) there is a triple threshold effect between industrial structure and water pollution, (2) with the improvement of industrial structure, the inhibition effect of industrial structure optimization on water pollution environment shows a law of first increasing and then decreasing. [ABSTRACT FROM AUTHOR]

Grey system analysis method was used to study the correlation between water pollution in D Lake area and death rate of malignancy with death rate of malignancy as effect sequence and a variety of water pollution index as factor sequence. On the basis of grey correlation analysis, grey system predication model was established for death rate of malignancy in population in D Lake area including GM(1, N) model for death rate of malignancy [MR(t+1)=(9.9987E1+5.0001E2+10.8994E3+1.1114E4+165.1029) · e−0.0070t−9.9987E1−5.0001E2−10.8994E3−1.1114E4] and GM(1. 1) model for related factors [E1(t+1)=52.1214−46.9468e−0.0058t, E2(t+1)=4.6114−4.5664e0.0015t, E3(t+1)=1.1389−1.1212e0.0065t, E4(t+1)=554.5867−549.8006e0.0016t], and the trend of death rate of malignancy from 2000 to 2010 was predicted. [ABSTRACT FROM AUTHOR]