期刊论文

中文

环境化学

0254-6108

2002

21

2

123-127

10.3321/j.issn:0254-6108.2002.02.004

国家自然科学基金资助项目 （ 396 70 4 2 4 ）；

本校为第一机构

用土柱模拟4种加硒处理的土壤还原淋溶过程,研究了硒在土壤中的迁移和积累.结果表明,未加硒处理(土壤背景硒)的溶液中硒的迁移以有机硒占优势,Se(Ⅵ)及Se(Ⅳ)占的比例很小;土壤富里酸硒由上层向下层迁移.外源蛋白硒的处理的溶液中硒迁移为有机硒,部分外源硒以富里酸硒积累在下层土壤.外源Se(Ⅵ)和Se(Ⅳ)处理的溶液中硒迁移量只占加入量的0.2%和0.4%,硒迁移的主要形态前者为有机硒,后者为Se(Ⅳ)和有机硒;外源Se(Ⅵ)和Se(Ⅳ)的绝大部分以富里酸硒的形态积累于土壤,其积累量Se(Ⅵ)处理高于Se(Ⅳ)处理,上层土壤高于下层土壤.

Four simulated reductive leaching experiment of earth column were conducted to study mobility and accumulation of selenium in waterlogging soil.In the percolation solution of the unadded sele- nium treatment,organic selenium was the major mobile form and the proportion of selenate and selenite was small.Fulvic acid-Se of the upper soil layer was mobilized to the lower soil layer.In the percolation solution of the added leaf protein-Se treatment,organic selenium was mobilized by water and most of the added selenium was lost.A little fulvic acid-Se was accumulated to the lower soil layer.In the ...