(土娄)土不同发生层铬(Ⅵ)吸附特性及还原容量研究

来源 :干旱地区农业研究 | 被引量 : 0次 | 上传用户：errand2000

【摘要】

：

研究了(土娄)土对Cr(Ⅵ)的吸附特性、影响因素及还原容量.结果表明:①(土娄)土不同土层对Cr(Ⅵ)的吸附量大小顺序为粘化层＞犁底层+老耕层＞耕层＞钙积层;土壤对Cr(Ⅵ)的吸附量与土

【作者】

：

易秀

【机构】

：

长安大学环境科学与工程学院

【出处】

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干旱地区农业研究

【发表日期】

：

2004年期

【关键词】

：

(土娄)土铬(Ⅵ) 吸附特性还原容量

【基金项目】

：

国家科技攻关项目;

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研究了(土娄)土对Cr(Ⅵ)的吸附特性、影响因素及还原容量.结果表明:①(土娄)土不同土层对Cr(Ⅵ)的吸附量大小顺序为粘化层＞犁底层+老耕层＞耕层＞钙积层;土壤对Cr(Ⅵ)的吸附量与土壤中Fe2O3、粘粒含量和Ph有关;②(土娄)土中Cr(Ⅵ) 被吸附的主要形态是HCrO4-;③土壤对Cr(Ⅵ)的等温吸附可以用Langmuir模型和Freundlich模型较好描述.根据Langmuir模型求得土娄土粘化层对Cr(Ⅵ)的最大吸附量最高,为228.3 μg/g;④(土娄)土各土层的测定还原容量在9 323～17 318 mg/kg之间,与土壤有机质有关;(土娄)土各土层对Cr(Ⅵ)的有效(条件)还原容量只有其测定还原容量的1/1844-1/3586.

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(土娄)土不同发生层铬(Ⅵ)吸附特性及还原容量研究

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