铁锰改性生物炭对水稻砷积累的调控作用研究  

Study on the control of arsenic accumulation in paddy rice by Fe-Mn modified biochar

作　　者：杜瑞琪 陈泽裕 吴心怡 俞宸晨 黄永浩 北原晶子 DU Ruiqi;CHEN Zeyu;WU Xinyi;YU Chenchen;HUANG Yonghao;BEIYUAN Jingzi(School of Food Science and Engineering,Foshan University,Foshan 528225,China;School of Environmental and Chemical Engineering,Foshan University,Foshan 528000,China)

机构地区：[1]佛山大学食品科学与工程学院,广东佛山528225 [2]佛山大学环境与化工学院,广东佛山528000

出　　处：《佛山科学技术学院学报(自然科学版)》2025年第2期68-73,共6页Journal of Foshan University(Natural Science Edition)

基　　金：国家自然科学青年基金资助项目(42007142);广东省基础与应用基础研究基金资助项目(2019A1515110927)。

摘　　要：对砷污染土壤开展水稻盆栽试验,研究了铁锰改性生物炭(Fe-MnBC)对污染土壤砷形态及水稻吸收砷的影响。研究结果表明,施入Fe-MnBC后,土壤Eh、pH呈升高趋势,孔隙水中砷浓度下降72.22%,植物有效砷下降31.45%,有效降低了土壤中非特异性吸附态砷和特异性吸附态砷的比例。水稻各器官的砷含量均有所下降,其中籽粒砷含量下降了44.61%,生物量增加了26.71%。因此,施入Fe-MnBC对土壤中砷有显著的固定效应,可降低砷的植物有效性和植物吸收转运砷的含量,从而抑制稻米中砷的积累。In order to explore the effect of iron-manganese modified biochar(Fe-MnBC)on arsenic speciation in an arsenic-contaminated soil and arsenic uptake by rice,this paper used a rice pot experiment in arsenic-contaminated soil.The results showed that after the application of Fe-MnBC,soil Eh and pH showed an increasing trend,arsenic concentration in pore water decreased by 72.22%,and plant-available arsenic decreased by 31.45%,effectively reducing the proportion of non-specifically adsorbed and specifically adsorbed arsenic in the soil.The total arsenic in all parts of paddy rice decreased,with the arsenic content in grains decreasing by 44.61% and the biomass increasing by 26.71%.Therefore,the application of Fe-MnBC has a significant immobilization effect on arsenic-contaminated soil,which can reduce the plant-available arsenic and the content of arsenic uptake and transported by plants,thus inhibiting the accumulation of arsenic in paddy rice.

关 键 词：铁锰改性生物炭 水稻 砷污染 砷形态 土壤修复 

分 类 号：X712[环境科学与工程—环境工程]