摘要
采用连续提取法测定了晴隆锑矿区8个植物样As、Sb不同形态的含量,包括浸提液及消解后的含量。结果表明,浸提液As和Sb主要以醋酸提取态FHAc、盐酸提取态FHCl、氯化钠提取态FNaCl、去离子水提取态FW为主,乙醇提取态FE很小;消解后,植物As、Sb各提取态均比浸提液中砷锑含量高,但乙醇提取态(FE)还是较低。其中,8个植物样消解Sb_FNaCl、Sb_FHCl及茶树As_FHCl达1 mg/kg以上。由于酸雨的影响,矿区植物体的重金属可能淋溶到土壤/水体中。因此,利用植物修复矿山及矿区收割的干植物都要注意植物体内重金属再度释放的问题。
Sequential extraction procedure was applied to study the forms of As and Sb in 8 plant samples from antimony mines of Qinglong, including contents of extraction and digestion. Results revealed that the main forms of As and Sb of plants extract were acetic acid extractable, hydrochloric acid extractable, sodium chloride extractable and deionized water extractable, but ethanol extractable was extremely small. The concentrations of various extractable of As and Sb in plant samples were higher after digestion, but ethanol extractable was still low. Meanwhile sodium chloride extractable and hydrochloric acid extractable of Sb in 8 plant samples and hydrochloric acid extractable of As in Camellia sinensis （L） O. Kuntze reached lmg/kg after digestiorn Heavy metal of mine may be leached to soil or water due to influence of acid rain. Therefore release of heavy metal should be paid attentions in the process of phytoremediation and harvested dry plant of mine.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第8期71-75,98,共6页
Environmental Science & Technology
基金
国家自然科学基金项目(41062007)
贵州省科学技术基金项目(黔科合J字号[2008]2029)
贵州省科技厅项目(黔科合计Z字[2012]4012)
贵州大学2014年研究生创新基金(研理工2014057)
关键词
锑矿区
重金属
逐步提取法
形态
毒性
antimony mine
heavy metal
sequential extraction procedure
speciation
toxicity
