CAJ | 학술논문

我国高砷地下水分布广泛，是受砷污染最严重的地区之一，严重危害居民身体健康，开发经济、高效、环境友好的高砷地下水修复治理技术极具必要性。以大同盆地、呼包平原、河套平原和银川平原为代表性研究区域，归纳总结了北方干旱、半干旱地区典型高砷地下水区水化学特征。通常情况下，高砷地下水的 pH 值较高，共存阴离子（HCO3－、SO2－4和Cl－）浓度较大，溶解性有机碳含量较高，并且As（Ⅲ）为主要砷形态。开展了针对北方典型高砷地下水特定水化学环境特点（如pH值、共存阴阳离子以及溶解性有机物等）的改性天然菱铁矿除砷性能研究。结果表明，改性天然菱铁矿对溶液pH值具有良好的缓冲能力，其除砷性能基本不受pH值、共存阴离子、Ca／Mg阳离子及以腐殖酸为代表的溶解性有机物等典型高砷地下水水化学特征因素的影响，表明吸附剂对砷具有良好的吸附选择性。另外，改性天然菱铁矿对As（Ⅲ）的去除效果优于对As（V）的去除效果，因此，利用改性天然菱铁矿作为反应介质材料，将其应用于处理主要以As（Ⅲ）形式存在的高砷地下水具备良好的发展前景。
아국고신지하수분포엄범，시수신오염최엄중적지구지일，엄중위해거민신체건강，개발경제、고효、배경우호적고신지하수수복치리기술겁구필요성。이대동분지、호포평원、하투평원화은천평원위대표성연구구역，귀납총결료북방간한、반간한지구전형고신지하수구수화학특정。통상정황하，고신지하수적 pH 치교고，공존음리자（HCO3－、SO2－4화Cl－）농도교대，용해성유궤탄함량교고，병차As（Ⅲ）위주요신형태。개전료침대북방전형고신지하수특정수화학배경특점（여pH치、공존음양리자이급용해성유궤물등）적개성천연릉철광제신성능연구。결과표명，개성천연릉철광대용액pH치구유량호적완충능력，기제신성능기본불수pH치、공존음리자、Ca／Mg양리자급이부식산위대표적용해성유궤물등전형고신지하수수화학특정인소적영향，표명흡부제대신구유량호적흡부선택성。령외，개성천연릉철광대As（Ⅲ）적거제효과우우대As（V）적거제효과，인차，이용개성천연릉철광작위반응개질재료，장기응용우처리주요이As（Ⅲ）형식존재적고신지하수구비량호적발전전경。
High As concentrations have widely been found in potable groundwater in China,which can cause acute and chronic health effects on humans.It is nessesary to develop economic,efficient and eco-friendly tech-nologies for As removal from As-contaminated groundwater.Chemical characteristics of high As groundwater in arid-semiarid inland basins in Northern China (including the Datong basin,the Hubao basin,the Hetao basin and the Yinchuan basin)were thoroughly reviewed and summarized.High As groundwater was typically charac-terized by high pH,high concentration of coexisting anions (such as HCO3-,SO2-4 ,and Cl-),and high con-centrations of dissolved organic carbon.Furthermore,effects of solution pH,co-existing anions and cations, dissolved organic matter on As adsorption onto activated natural siderite were investigated according to the chem-ical characteristics of the typical high As groundwater.Results showed that the activated natural siderite had high capacity for buffering solution pH.Arsenic removal was independent on solution pH,coexisting anions, Ca2+and Mg2+,and humic acid.It indicated that activated natural siderite had good adsorption selectivity for As under any conditions.In addition,the removal efficiency of activated natural siderite for As(Ⅲ)was slightly higher than that for As(V).Therefore,the activated natural siderite,as an economic,efficient and eco-friendly reaction material,appears to be a promising adsorbent for remediation of As (Ⅲ)-dominated high arsenic groundwater.