[Objective] The aim was to study the effects of dissolved oxygen(DO) on nitrogen release from Jialu River sediment.[Method] Based on the present pollution of Jialu River(in Zhengzhou),the effects of dissolved oxygen o...[Objective] The aim was to study the effects of dissolved oxygen(DO) on nitrogen release from Jialu River sediment.[Method] Based on the present pollution of Jialu River(in Zhengzhou),the effects of dissolved oxygen on nitrogen transformation in Jialu River sediment were analyzed through simulation test of original columnar sediment.[Result] DO was the main impact factor of nitrogen transformation in Jialu River sediment,and DO with different concentrations had various effects on the transformation time and transformation efficiency of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen.Under aerobic environment,ammoniation,nitrosification and nitrification conducted completely,and the transformation time of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen was less than that under anaerobic environment,while the transformation efficiency was higher than that under anaerobic environment.[Conclusion] The study could provide scientific references for the water pollution control of Jialu River.展开更多
The Jialu River in China has been seriously polluted by the direct discharge of industrial and domestic wastewater. The predominant contaminants of the Jialu River and its adjacent groundwater were recently investigat...The Jialu River in China has been seriously polluted by the direct discharge of industrial and domestic wastewater. The predominant contaminants of the Jialu River and its adjacent groundwater were recently investigated. However, the potential genotoxic impact of polluted water on human health remains to be clarified. Here, we used human–hamster hybrid（AL） cells, which are sensitive for detecting environmental mutagens. We found that the cytotoxicity and mutagenicity of the groundwater in the Jialu River basin were influenced by the infiltration of the Jialu River. Hydrological periods significantly affected the cytotoxicity, but not the mutagenic potential, of surface and groundwater. Further, the mutagenic potential of groundwater samples located 〈 1 km from the Jialu River（S（M-2） water samples） was detected earlier than that of groundwater samples located approximately 20 km from the Jialu River（SN water samples）. Because of high cytotoxicity, the mutagenic potential of water samples from the Jialu River（S（M-1） water samples） was not significantly enhanced compared with that of untreated controls. To further assess the mutagenic dispersion potential, an artificial neural network model was adopted. The results showed that the highest mutagenic potential of groundwater was observed approximately 10 km from the Jialu River. Although further investigation of mutagenic spatial dispersion is required, our data are significant for advancing our understanding of the origin, dispersion,and biological effects of water samples from polluted areas.展开更多
After the illustration of ecological restoration and research situation of foreign and domestic rivers,the paper has analyzed the relation between plants and river ecological restoration.By taking Jialu River that is ...After the illustration of ecological restoration and research situation of foreign and domestic rivers,the paper has analyzed the relation between plants and river ecological restoration.By taking Jialu River that is the main river of Zhengzhou City,for example,it has introduced the general situation of the project and the site,water quality of the river,and soil survey and testing.It has pointed out that the structural system of ecological space of "one corridor,one core and five areas" has formed in ecological restoration project.On this basis,it has analyzed plants disposition forms in waterfront area,emphasized combining aquatic plants and urban waterfront areas to construct a natural ecological river channel which will be a new design idea for ecological reconstruction in modern urban waterfront area.展开更多
基金Supported by National Key Water Project of Huai River(2009ZX07010-010-003)
文摘[Objective] The aim was to study the effects of dissolved oxygen(DO) on nitrogen release from Jialu River sediment.[Method] Based on the present pollution of Jialu River(in Zhengzhou),the effects of dissolved oxygen on nitrogen transformation in Jialu River sediment were analyzed through simulation test of original columnar sediment.[Result] DO was the main impact factor of nitrogen transformation in Jialu River sediment,and DO with different concentrations had various effects on the transformation time and transformation efficiency of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen.Under aerobic environment,ammoniation,nitrosification and nitrification conducted completely,and the transformation time of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen was less than that under anaerobic environment,while the transformation efficiency was higher than that under anaerobic environment.[Conclusion] The study could provide scientific references for the water pollution control of Jialu River.
基金supported by the CAS Strategic Priority Research Program(No.XDB14030502)the National Basic Research Program(973)of China(No.2014CB932002)+5 种基金the Natural Science Foundation of Anhui Province(No.1808085QB37)the Hi-Tech Research and Development Program(863)of China(No.2008AA062504)the National Natural Science Foundation of China(Nos.20977093,81273004,81301182,and 31470829)the Talent Research Foundation of Hefei University(No.16-17RC03)the Key Project of Natural Science Research of Anhui High Education Institutions(Nos.KJ2017A545,and KJ2017A546)the Project of Anhui Quality Engineering(No.2016msgzs060)
文摘The Jialu River in China has been seriously polluted by the direct discharge of industrial and domestic wastewater. The predominant contaminants of the Jialu River and its adjacent groundwater were recently investigated. However, the potential genotoxic impact of polluted water on human health remains to be clarified. Here, we used human–hamster hybrid（AL） cells, which are sensitive for detecting environmental mutagens. We found that the cytotoxicity and mutagenicity of the groundwater in the Jialu River basin were influenced by the infiltration of the Jialu River. Hydrological periods significantly affected the cytotoxicity, but not the mutagenic potential, of surface and groundwater. Further, the mutagenic potential of groundwater samples located 〈 1 km from the Jialu River（S（M-2） water samples） was detected earlier than that of groundwater samples located approximately 20 km from the Jialu River（SN water samples）. Because of high cytotoxicity, the mutagenic potential of water samples from the Jialu River（S（M-1） water samples） was not significantly enhanced compared with that of untreated controls. To further assess the mutagenic dispersion potential, an artificial neural network model was adopted. The results showed that the highest mutagenic potential of groundwater was observed approximately 10 km from the Jialu River. Although further investigation of mutagenic spatial dispersion is required, our data are significant for advancing our understanding of the origin, dispersion,and biological effects of water samples from polluted areas.
文摘After the illustration of ecological restoration and research situation of foreign and domestic rivers,the paper has analyzed the relation between plants and river ecological restoration.By taking Jialu River that is the main river of Zhengzhou City,for example,it has introduced the general situation of the project and the site,water quality of the river,and soil survey and testing.It has pointed out that the structural system of ecological space of "one corridor,one core and five areas" has formed in ecological restoration project.On this basis,it has analyzed plants disposition forms in waterfront area,emphasized combining aquatic plants and urban waterfront areas to construct a natural ecological river channel which will be a new design idea for ecological reconstruction in modern urban waterfront area.
