Antimony(Sb)in natural water has long-term effects on both the ecological environment and human health.Iron mineral phase transformation(IMPT)is a prominent process for removing Sb(V)from natural water.However,the imp...Antimony(Sb)in natural water has long-term effects on both the ecological environment and human health.Iron mineral phase transformation(IMPT)is a prominent process for removing Sb(V)from natural water.However,the importance of IMPT in eliminating Sb remains uncertain.This study examined the various Sb–Fe binding mechanisms found in different IMPT pathways in natural water,shedding light on the underlying mechanisms.The study revealed that the presence of goethite(Goe),hematite(Hem),and magnetite(Mag)significantly affected the concentration of Sb(V)in natural water.Elevated pH levels facilitated higher Fe content in iron solids but impeded the process of removing Sb(V).To further our understanding,polluted natural water samples were collected from various locations surrounding Sb smelter sites.Results confirmed that converting ferrihydrite(Fhy)to Goe significantly reduced Sb levels(<5μg/L)in natural water.The emergence of secondary iron phases resulted in greater electrostatic attraction and stabilized surface complexes,which was the most likely cause of the decline of Sb concentration in natural water.The comprehensive findings offer new insights into the factors governing IMPT as well as the Sb(V)behavior control.展开更多
地表水体遵循着水平衡原理和水循环原理,导致我国水资源短缺,主要原因之一是水资源污染问题,水体污染程度随着工农业生产和经济发展速度的加快不断加剧,在此背景下本文提出生态补偿下区域水环境非点源污染治理技术。首先在BASINS平台中...地表水体遵循着水平衡原理和水循环原理,导致我国水资源短缺,主要原因之一是水资源污染问题,水体污染程度随着工农业生产和经济发展速度的加快不断加剧,在此背景下本文提出生态补偿下区域水环境非点源污染治理技术。首先在BASINS平台中构建了HSPF(hydrological simulation program fortran)水文模型,然后采用HSPF水文模型对区域水环境的非点源污染情况展开分析,包括非点源污染负荷总量以及污染负荷量时间分布情况,最后在生态补偿理念下根据分析结果提出生态施肥技术、水土保持技术、固体废物和污水处理技术,治理区域水环境的非点源污染。展开更多
基金financially supported by the National Key R&D Program of China(No.2022YFC3900200)Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.52121004)+3 种基金Major program Natural Science Foundation of Hunan Province of China(No.2021JC0001)National Natural Science Foundation of China(No.22276218)key projects of Science and Technology of Hunan Province(No.2020SK2006)Science and Technology Innovation Program of Hunan Province(No.2021RC3013).
文摘Antimony(Sb)in natural water has long-term effects on both the ecological environment and human health.Iron mineral phase transformation(IMPT)is a prominent process for removing Sb(V)from natural water.However,the importance of IMPT in eliminating Sb remains uncertain.This study examined the various Sb–Fe binding mechanisms found in different IMPT pathways in natural water,shedding light on the underlying mechanisms.The study revealed that the presence of goethite(Goe),hematite(Hem),and magnetite(Mag)significantly affected the concentration of Sb(V)in natural water.Elevated pH levels facilitated higher Fe content in iron solids but impeded the process of removing Sb(V).To further our understanding,polluted natural water samples were collected from various locations surrounding Sb smelter sites.Results confirmed that converting ferrihydrite(Fhy)to Goe significantly reduced Sb levels(<5μg/L)in natural water.The emergence of secondary iron phases resulted in greater electrostatic attraction and stabilized surface complexes,which was the most likely cause of the decline of Sb concentration in natural water.The comprehensive findings offer new insights into the factors governing IMPT as well as the Sb(V)behavior control.
文摘地表水体遵循着水平衡原理和水循环原理,导致我国水资源短缺,主要原因之一是水资源污染问题,水体污染程度随着工农业生产和经济发展速度的加快不断加剧,在此背景下本文提出生态补偿下区域水环境非点源污染治理技术。首先在BASINS平台中构建了HSPF(hydrological simulation program fortran)水文模型,然后采用HSPF水文模型对区域水环境的非点源污染情况展开分析,包括非点源污染负荷总量以及污染负荷量时间分布情况,最后在生态补偿理念下根据分析结果提出生态施肥技术、水土保持技术、固体废物和污水处理技术,治理区域水环境的非点源污染。
