Ionic‐Liquid‐Assisted Hydrothermal Synthesis of Ag/AgBr for Photodegradation of Imidacloprid under Visible Light     

Dandan Guo  Xiaoqing Zhu  Sheyun Chen  Cenling Wang  Mingli Pi  Xiaoxia Chen  Yuqing Shi  Jingtao Dai 《洁净——土壤、空气、水》2019,47(5)

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Effects of Planting Field on Groundwater and Surface Water Pollution in China     

Yaa Opoku‐Kwanowaa  Rachel Kasoro Furaha  Li Yan  Daming Wei 《洁净——土壤、空气、水》2020,48(5-6)

Water forms an essential resource for life on earth because all living things on earth depend on water for life activities. However, with the increase in the human population, which is coupled with intense urbanization and agricultural activities, global water pollution has increased over the past decades. In China, agricultural activities that occure mainly in the planting fields have been listed as the main source of surface water and groundwater pollution. This review focuses on the major factors that influence pollution from planting fields in China mainly as a result of farming activities such as flood irrigation, excessive application of fertilizers and pesticides, and poor management practices. At present, good results are achieved by adopting soil fertilization test formula, biodegradable pesticides, proper irrigation, and agroforestry interventions. In the future, pollution from planting fields as a non‐point source of water pollution can be improved and resolved by perfect nutrient management, best management practices, organic amendments, restoring water environment, and intelligent assessment management.  相似文献   

Trends in groundwater quality     

Jim C. Loftis 《水文研究》1996,10(2):335-355

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Current status and historical trends of organochlorine pesticides in the ecosystem of Deep Bay, South China   总被引：1，自引：0，他引：1  

Yao-Wen Qiu  Gan Zhang  Ling-Li Guo  Hai-Rong Cheng  Wen-Xiong Wang  Xiang-Dong Li  Onyx W.H. Wai 《Estuarine, Coastal and Shelf Science》2009,85(2):265-272

To characterize the current status and historical trends in organochlorine pesticides (OCPs) contamination in Deep Bay, an important water body between Hong Kong and mainland China with a Ramsar mangrove wetland (Maipo), samples from seawater, suspended particulate matter (SPM), surface sediment, sediment core and fish were collected to determine the OCPs concentrations. Sediment core dating was accomplished using the ²¹⁰Pb method. The average concentrations of DDTs, HCHs and chlordanes in water were 1.96, 0.71, 0.81 ng l⁻¹, while in SPM were 36.5, 2.5, 35.7 ng g⁻¹ dry weight, in surface sediment were 20.2, 0.50, 2.4 ng g⁻¹ dry weight, and in fish were 125.4, 0.43, 13.1 ng g⁻¹ wet weight, respectively. DDTs concentrations in various matrices of Deep Bay were intermediate compared with those in other areas. Temporal trends of the targeted OCPs levels in sediment core generally increased from 1948 to 2004, with the highest levels in top or sub-surface sediment. Both DDT composition and historical trends indicated an ongoing fresh DDT input. A positive relationship between the bioconcentration factor (BCF) of target chemicals and the corresponding octanol–water partition coefficient (K_ow), and between the biota-sediment accumulation factors (BSAF) and the K_ow were observed in the Bay. The risk assessment indicated that there were potential ecological and human health risks for the target OCPs in Deep Bay.  相似文献