期刊论文

Zeng, X.

中文

环境科学学报

0253-2468

2013

33

7

1953-1959

10.13671/j.hjkxxb.2013.07.028

国家自然科学基金（No.41171255,41001187）； “十二五”国家科技支撑计划（No.2011BAD04B01）~~；

本校为第一机构

应用室内模拟培养的方法,研究了人工合成铁、铝矿物和镁铝双金属氧化物对砷超标土壤中砷的钝化效果.每种钝化剂均设置0.1%、0.5%、1.0%、2.5%和5.0%五个添加量处理.结果表明,添加水铝矿明显降低了土壤pH值,其中,添加5%水铝矿的处理降幅最大,达到1.20;而添加镁铝双金属氧化物则显著提高了土壤pH值,5%镁铝双金属氧化物的处理土壤pH值由5.04最高可提高至8.09.添加铁铝矿物均降低了土壤有效砷的含量,下降幅度为1.89%~64.15%;而添加镁铝双金属氧化物则使土壤有效砷含量增加;添加水铁矿和针铁矿处理对提高土壤中残留态砷含量的作用较为明显.总体看来,两种人工合成铁矿较镁铝双金属氧化物和水铝矿对土壤...

Laboratory incubation experiments were conducted to investigate the immobilization effects of synthetic Fe/A1 minerals and Mg/AI layered double oxides （Mg/AI-LDO） additions on arsenic （As） in As-contaminated soils. Five different addition rates （0. 1% , 0.5% , 1.0% , 2.5% and 5.0% ） in soils were set in each amendment. The results showed that the soil pH obviously decreased and had the maximum decrease value of 1.20 units by adding 5% of gibbsite. In contrast, the soil pH significantly increased from 5.04 to 8.09 by adding 5% of Mg/A1 lay...