Based on the water quality monitoring data of 5 large reservoirs in Ji’an City,Jiangxi Province from 2015-2021,the temporal and spatial variation characteristics and trends of water quality of the reservoirs were ana...Based on the water quality monitoring data of 5 large reservoirs in Ji’an City,Jiangxi Province from 2015-2021,the temporal and spatial variation characteristics and trends of water quality of the reservoirs were analyzed by single-factor evaluation method and seasonal Kendall test to evaluate the trophic status of the reservoirs and explore the influencing factors of characteristic pollutants.The results showed that:①the water quality of the reservoirs was good and could meet the water needs of various functions;②the water quality of the reservoirs had generally changed from bad to good in recent years,indicating that the implementation of“river chief system”has achieved certain results;③Kendall test analysis showed that,except for individual projects which showed an upward trend in water quality,other projects showed no obvious change trend or downward trend,indicating that the water quality of the reservoirs is indeed improving;④the causes of water pollution in reservoir area were further analyzed by exploring the natural and human factors of the characteristic pollutant total phosphorus.It is recommended to strengthen supervision in the later stage to control point and non-point source pollution.展开更多
通过β-半乳糖苷酶(β-GAL)与其特异性底物氯苯酚红β-半乳糖苷(CPRG)发生显色反应,选取纸张作为载体,基于纳米颗粒的捕获能力对致病菌进行可视化的检测。通过相关的优化实验最终确定了在比色微斑试纸条中分别滴加25 mM CPRG和15 n Mβ-...通过β-半乳糖苷酶(β-GAL)与其特异性底物氯苯酚红β-半乳糖苷(CPRG)发生显色反应,选取纸张作为载体,基于纳米颗粒的捕获能力对致病菌进行可视化的检测。通过相关的优化实验最终确定了在比色微斑试纸条中分别滴加25 mM CPRG和15 n Mβ-GAL,可在10 min内发生显色反应。在4种配体中最终选择NP2为最佳纳米颗粒,β-GAL与NP2的浓度比为15:80。利用数字图像分析软件基于三通道进行相应的定量分析,检测大肠杆菌(XL1)的最低检出限为103CFU/mL。展开更多
基金Hydraulic Science and Technology Project of Water Resources Department of Jiangxi Province(202324YBKT14)Youth Science and Technology Innovation Fund of Jiangxi Hydrology Monitoring Center(SWJJKT202208).
文摘Based on the water quality monitoring data of 5 large reservoirs in Ji’an City,Jiangxi Province from 2015-2021,the temporal and spatial variation characteristics and trends of water quality of the reservoirs were analyzed by single-factor evaluation method and seasonal Kendall test to evaluate the trophic status of the reservoirs and explore the influencing factors of characteristic pollutants.The results showed that:①the water quality of the reservoirs was good and could meet the water needs of various functions;②the water quality of the reservoirs had generally changed from bad to good in recent years,indicating that the implementation of“river chief system”has achieved certain results;③Kendall test analysis showed that,except for individual projects which showed an upward trend in water quality,other projects showed no obvious change trend or downward trend,indicating that the water quality of the reservoirs is indeed improving;④the causes of water pollution in reservoir area were further analyzed by exploring the natural and human factors of the characteristic pollutant total phosphorus.It is recommended to strengthen supervision in the later stage to control point and non-point source pollution.
文摘通过β-半乳糖苷酶(β-GAL)与其特异性底物氯苯酚红β-半乳糖苷(CPRG)发生显色反应,选取纸张作为载体,基于纳米颗粒的捕获能力对致病菌进行可视化的检测。通过相关的优化实验最终确定了在比色微斑试纸条中分别滴加25 mM CPRG和15 n Mβ-GAL,可在10 min内发生显色反应。在4种配体中最终选择NP2为最佳纳米颗粒,β-GAL与NP2的浓度比为15:80。利用数字图像分析软件基于三通道进行相应的定量分析,检测大肠杆菌(XL1)的最低检出限为103CFU/mL。
