目的测定广东省某郊区部分农村井水中铝(aluminium,Al)的污染情况,并对重金属非致癌的健康风险进行分析与评估,为安全饮用井水提供科学依据。方法2020年9月用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-...目的测定广东省某郊区部分农村井水中铝(aluminium,Al)的污染情况,并对重金属非致癌的健康风险进行分析与评估,为安全饮用井水提供科学依据。方法2020年9月用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)对4个村井水的铝含量进行检测。根据《生活饮用水卫生标准》(GB 5749—2022),计算井水中铝含量的超标率,采用占比对分类变量进行描述,采用χ^(2)检验、Kruskal-Wallis检验进行组间比较,用单因素污染指数法与美国环境保护署推荐的健康风险评价模型进行风险评估。结果广东省某郊区农村井水靠近大型采石场,4个村井水中铝含量均有超标现象,超标率高达50.00%以上。不同采样点井水中铝含量超标率差异有统计学意义(χ^(2)=70.31、65.50、50.05、20.04,P<0.05);铝的单因素污染指数(index,I)平均值IAl=1.22,平均污染指数>1.00;铝的健康风险(risk,R)值RAl=6.06×10^(-8),低于国际放射防护委员会(International Commission on Radiological Protection,ICRP)的推荐值(5.00×10^(-5))。结论广东省某郊区农村井水铝含量超出国家标准限量,说明井水中铝含量超标严重,而健康风险值在可接受范围内,4个采样点井水铝的非致癌风险也在可接受范围内。长期饮用井水的风险可能加大,应对井水中铝含量加强监测和评估,防止发生突发公共卫生事件。展开更多
Water scarcity in Khuzestan Province,Iran,has attracted growing concerns despite the region's abundant water resources.The province predominantly relies on surface water,prompting an assessment of groundwater'...Water scarcity in Khuzestan Province,Iran,has attracted growing concerns despite the region's abundant water resources.The province predominantly relies on surface water,prompting an assessment of groundwater's potential to supplement water supplies during surface water shortages.This study assesses the province's groundwater availability and quality under increased exploitation conditions.Between 2008 and 2018,data on groundwater quantity and quality were collected from 204 exploration wells and 70 piezometric wells across 19 aquifers.The analysis revealed that 53%of aquifers in the eastern and northeastern regions experienced declining groundwater levels.Hydrochemical assessments indicated low concentrations of major ions in the northeastern,while high levels were observed from the central region towards the southeast.These variations were attributed to agricultural and industrial activities,seawater intrusion,and the influences of evaporation and geological factors.The dominant hydrochemical facies identified were of the Ca-Cl type.Water quality classification showed that 48%of groundwater samples fell within the C4S4-C4S1 category,primarily in the western,central,and southern regions,while 27%were classified as C3S2,C3S1,and 25%as C2S1,mainly in the northern and eastern regions.The Irrigation WWater Quality(IWQ)index indicated that many samples were suitable for irrigation.Additionally,the analysis potable groundwater was primarily found in the northern,northeastern,and eastern aquifers,with quality declining toward the south.The study highlights that certain aquifers in the northern and eastern regions offer greater potential for sustainable groundwater exploitation during water shortages.These findings provide valuable insights for on how to implement effective land and water management strategies to mitigate future water crises.展开更多
Surface water provides crucial support to the aquatic ecosystem and humans in numerous ways.However,its quality is paramount in determining its impact on the health of the aquatic ecosystem and humans.Currently,the ma...Surface water provides crucial support to the aquatic ecosystem and humans in numerous ways.However,its quality is paramount in determining its impact on the health of the aquatic ecosystem and humans.Currently,the malady of pollution arising from anthropogenic activities poses a significant threat to the quality of most rivers.The quality of water in the Kapingazi river in Embu County has received limited attention which is a concern that needs to be addressed.This study therefore,sought to investigate the status of water quality in river Kapingazi.The study analyzed 96 samples from four locations in a span of eight months which combined the dry and wet seasons of the year.Parameters measured in-situ included turbidity,pH,total dissolved solids(TDS),temperature,dissolved oxygen(DO)and electrical conductivity(EC)while ex-situ parameters were phosphates,nitrates and concentrations of heavy metals:iron and manganese.Results showed that Water Quality Index(WQI)during the drought period was74.05,suggesting that the water quality is only recommended for agricultural and industrial applications.During wet season,the water quality index was 89.67,reflecting a poor status,as more contaminants were likely introduced through surface runoff.Overall,the WQI averaged to 88.02.This study concludes that water in River Kapingazi is not suitable for human consumption;therefore,appropriate treatment is essential prior to its use.Similarly,the findings indicate that both rainy and drought periods significantly affect water quality,presenting challenges for its use for various purposes.It is recommended that the allocation of resources towards water treatment facilities and regulation of pollution sources should be enforced to ensure the safety of river water for diverse applications.展开更多
文摘目的测定广东省某郊区部分农村井水中铝(aluminium,Al)的污染情况,并对重金属非致癌的健康风险进行分析与评估,为安全饮用井水提供科学依据。方法2020年9月用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)对4个村井水的铝含量进行检测。根据《生活饮用水卫生标准》(GB 5749—2022),计算井水中铝含量的超标率,采用占比对分类变量进行描述,采用χ^(2)检验、Kruskal-Wallis检验进行组间比较,用单因素污染指数法与美国环境保护署推荐的健康风险评价模型进行风险评估。结果广东省某郊区农村井水靠近大型采石场,4个村井水中铝含量均有超标现象,超标率高达50.00%以上。不同采样点井水中铝含量超标率差异有统计学意义(χ^(2)=70.31、65.50、50.05、20.04,P<0.05);铝的单因素污染指数(index,I)平均值IAl=1.22,平均污染指数>1.00;铝的健康风险(risk,R)值RAl=6.06×10^(-8),低于国际放射防护委员会(International Commission on Radiological Protection,ICRP)的推荐值(5.00×10^(-5))。结论广东省某郊区农村井水铝含量超出国家标准限量,说明井水中铝含量超标严重,而健康风险值在可接受范围内,4个采样点井水铝的非致癌风险也在可接受范围内。长期饮用井水的风险可能加大,应对井水中铝含量加强监测和评估,防止发生突发公共卫生事件。
文摘Water scarcity in Khuzestan Province,Iran,has attracted growing concerns despite the region's abundant water resources.The province predominantly relies on surface water,prompting an assessment of groundwater's potential to supplement water supplies during surface water shortages.This study assesses the province's groundwater availability and quality under increased exploitation conditions.Between 2008 and 2018,data on groundwater quantity and quality were collected from 204 exploration wells and 70 piezometric wells across 19 aquifers.The analysis revealed that 53%of aquifers in the eastern and northeastern regions experienced declining groundwater levels.Hydrochemical assessments indicated low concentrations of major ions in the northeastern,while high levels were observed from the central region towards the southeast.These variations were attributed to agricultural and industrial activities,seawater intrusion,and the influences of evaporation and geological factors.The dominant hydrochemical facies identified were of the Ca-Cl type.Water quality classification showed that 48%of groundwater samples fell within the C4S4-C4S1 category,primarily in the western,central,and southern regions,while 27%were classified as C3S2,C3S1,and 25%as C2S1,mainly in the northern and eastern regions.The Irrigation WWater Quality(IWQ)index indicated that many samples were suitable for irrigation.Additionally,the analysis potable groundwater was primarily found in the northern,northeastern,and eastern aquifers,with quality declining toward the south.The study highlights that certain aquifers in the northern and eastern regions offer greater potential for sustainable groundwater exploitation during water shortages.These findings provide valuable insights for on how to implement effective land and water management strategies to mitigate future water crises.
文摘Surface water provides crucial support to the aquatic ecosystem and humans in numerous ways.However,its quality is paramount in determining its impact on the health of the aquatic ecosystem and humans.Currently,the malady of pollution arising from anthropogenic activities poses a significant threat to the quality of most rivers.The quality of water in the Kapingazi river in Embu County has received limited attention which is a concern that needs to be addressed.This study therefore,sought to investigate the status of water quality in river Kapingazi.The study analyzed 96 samples from four locations in a span of eight months which combined the dry and wet seasons of the year.Parameters measured in-situ included turbidity,pH,total dissolved solids(TDS),temperature,dissolved oxygen(DO)and electrical conductivity(EC)while ex-situ parameters were phosphates,nitrates and concentrations of heavy metals:iron and manganese.Results showed that Water Quality Index(WQI)during the drought period was74.05,suggesting that the water quality is only recommended for agricultural and industrial applications.During wet season,the water quality index was 89.67,reflecting a poor status,as more contaminants were likely introduced through surface runoff.Overall,the WQI averaged to 88.02.This study concludes that water in River Kapingazi is not suitable for human consumption;therefore,appropriate treatment is essential prior to its use.Similarly,the findings indicate that both rainy and drought periods significantly affect water quality,presenting challenges for its use for various purposes.It is recommended that the allocation of resources towards water treatment facilities and regulation of pollution sources should be enforced to ensure the safety of river water for diverse applications.
