【摘要】 对土壤中Cr(Ⅵ )和Cr(Ⅲ )的吸附与pH的关系进行了研究 ,初步探讨了其吸附机理 ,选择了合适的铬吸附提取剂。此外 ,还研究了土壤中铬的形态连续提取方法和形态分布规律 ,结果表明 ,铬在土壤中主要以残渣态、沉淀态和有机结合态形式存在。其中残渣态铬含量占总铬量的 5 0 %以上更多还原

【Abstract】 In the present study, the relationship between adsorption of Cr(Ⅵ)and Cr(Ⅲ) in soil and pH was investigated. The mechanism for Cr adsorption in soil was discussed. The extracting reagents of Cr adsorbed in soil were screened. Sequential extraction method of Cr form in soil and distribution pattern of Cr form in soil were also studied. Experimental results indicated that chromium was present in soil by means of precipitation form, residue form and organic comptexing form.The content of Cr in residue form was more than 50 percent amount of Cr in soil.更多还原