树脂基纳米零价铁对水中As(Ⅲ)和Sb(Ⅲ)去除的比较研究

Comparison of As(Ⅲ) and Sb( Ⅲ) Removal Behavior with Nanoscale Zero-valent Iron Composite Materials

砷和锑是地下水和工业废水中较常见且较难处理的两种有毒物质,造成的污染已受到全球广泛关注。而且砷和锑在化学性质和毒性上有许多相似之处,对比研究砷和锑的去除行为至关重要。采用树脂基纳米零价铁复合材料去除水体中的As(Ⅲ)和Sb(Ⅲ)。对比研究不同实验条件下复合材料对As(Ⅲ)和Sb(Ⅲ)去除的规律性。研究结果表明,D201-nZVI对Sb(Ⅲ)、As(Ⅲ)的去除均更好地符合准二级动力学模型和Freundlich吸附等温线模型,As(Ⅲ)更易被D201-n ZVI吸附,D201-n ZVI对As(Ⅲ)的吸附量更高。

Arsenic(As)and antimony(Sb)are toxic inorganic contaminations in groundwater and industrial wastewater.The pollution caused by As and Sb has become an environmental concern throughout the world.Since As and Sb are expected to share numerous similarities in chemical properties and toxicity,it is more important to assess the removal behavior of As(Ⅲ)and Sb(Ⅲ).The experimental results showed that The removal of As(Ⅲ)and Sb(Ⅲ)by D201-nZVI fitted the Freundlich isotherm model well and the pseudo-second order equation.