期刊论文

Lei, Ming(leiming8297@163.com)

中文

环境科学

0250-3301

2022

43

5

2732-2740

10.13227/j.hjkx.202108003

国家自然科学基金项目（41671475）；

本校为第一机构

为了探究铁、锰矿物对稻田土壤砷（As）形态与酶活性的影响，将实验室合成的水铁矿和水钠锰矿添加到As污染稻田土壤中进行持续淹水土壤培养实验。结果表明与对照（CK）相比，添加0.1%水铁矿（+Fe）和0.1%水钠锰矿（+Mn）能延缓土壤Eh降低，增加土壤溶液中Fe和Mn的浓度，但是对土壤pH影响较小。与预期相符，+Fe和+Mn处理显著降低大部分监测点土壤溶液中总As（TAs）浓度，提高土壤溶液中砷酸盐[As（V）]占TAs的比例，促使固相As形态向晶型铁氧化物结合态As（F5）转化。此外，与CK相比，+Fe和+Mn处理土壤脲酶活性分别提高5.01%和101.36%，土壤蔗糖酶活性分别提高394.51%和688.84%，土壤过氧化氢酶活...

Artificially synthesized ferrihydrite and birnessite were added to As-contaminated paddy soil to explore their effects on arsenic (As) speciation and soil enzyme activity in continuously flooding soil. Compared with that of the control treatment (CK), the addition of 0.1% ferrihydrite(+Fe) and 0.1% birnessite (+Mn) delayed the decrease in soil Eh and increased the contents of Fe and Mn in porewater; however, it had little effect on soil pH. Consistent with our expectations, the +Fe and +Mn treatments significantly reduced the content of total A...