摘要
研究Zn2+和HCO3?对纳米磁性铁去除水中砷的影响。结果表明:Zn2+可以显著增强纳米磁性铁对砷的吸附,使As(Ⅴ)去除率由原来的66%提高到99%以上;HCO3?对纳米磁性铁吸附砷具有明显的抑制作用,使As(Ⅴ)去除率降至15%;而Zn2+可以削弱HCO3?对As(Ⅴ)吸附的抑制效应,在较短时间内(2 h)去除90%以上的As(Ⅴ),达到世界卫生组织规定的饮用水砷标准10μg/L。
The effects of Zn2＋ and HCO3- on arsenic adsorption by magnetite nanoparticles were investigated.The results show that in the presence of Zn2＋,the As（Ⅴ） adsorption on magnetite nanoparticles is significantly enhanced and the arsenic removal rate is increased from 66% to over 99%;and the arsenic（Ⅴ） adsorption can be suppressed by the presence of HCO3-,resulting in the fact that the arsenic removal rate is reduced to 15%.However,the addition of Zn2＋ can offset the negative effect of bicarbonate on arsenic（Ⅴ） adsorption by magnetite nanoparticles,thus,the arsenic（Ⅴ） can be effectively removed by over 90% in 2 h,to meet the drinking water standard for arsenic（10 μg/L） set by world health organization.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2011年第9期2285-2290,共6页
The Chinese Journal of Nonferrous Metals
基金
国家杰出青年科学基金资助项目(50925417)
国家自然科学基金重点资助项目(50830301)
国家水体污染控制与治理科技重大专项资助项目(2009ZX07212-001-01)
湖南省科技计划资助项目(2010WK3043)
关键词
砷
锌
碳酸氢根
吸附
纳米磁性铁
arsenic
zinc
bicarbonate
adsorption
magnetite nanoparticles
