Study on the control of arsenic accumulation in paddy rice by Fe-Mn modified biochar
DU Ruiqi
CHEN Zeyu
WU Xinyi
YU Chenchen
HUANG Yonghao
BEIYUAN Jingzi
Abstract：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.
Keywords：iron manganese modified biocharricearsenic pollutionarsenic speciationsoil remediation
Publication Date：2025-03-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 68-73 )