硅改性生物炭对土壤中镉赋存形态分布的影响研究  

Influences Study of Silicon-Modified Biochar on Cadmium Occurrence Morphology Distribution

作　　者：王林 安正阳 彭瑞莹 李蓉 王少龙 WANG Lin;AN Zhengyang;PENG Ruiying;LI Rong;WANG Shaolong(Honghe University,Mengzi,Yunnan 661100,China)

机构地区：[1]红河学院,云南蒙自661100

出　　处：《云南冶金》2024年第5期89-95,共7页Yunnan Metallurgy

基　　金：红河学院博士专项基金(BS2005)。

摘　　要：针对土壤中的Cd污染,采用硅酸钠浸渍法制备不同硅负载比例的生物炭,通过土壤培养试验,考察了四个理化因子和Cd形态变化以及相关性。结果表明:硅改性生物炭显著提高土壤电导率、阳离子交换量、有机质和pH,均可降低可交换态Cd的含量,增加残渣态Cd的含量。施加4∶1 SiBC的土壤中可交换态Cd的含量与理化因子呈极显著或显著负相关,残渣态Cd的含量与理化因子呈极显著或显著正相关。硅改性生物炭可影响Cd赋存形态分布,提高对土壤中Cd的稳定化效果。The biochar with different silicon-bearing ratios was prepared by sodium silicate impregnation for Cd pollution in soil,in this process,we did the soil cultivation test and investigated four physicochemical factors,Cd morphologic change and its relativity.Results show:that silicon-modified biochar can obviously improve soil electric conductivity,cation exchange capacity,organic matter,and pH,all of these can decrease Cd content in the commutative state and increase Cd content in the residue state.In the soil added with 4:1SiBC,the Cd content in the commutative state is related to a significant or significantly negative correlation of physicochemical factors,and the Cd content in the residue state is associated with an important or significantly positive correlation of physicochemical factors.The silicon-modified biochar can affect the occurrence morphology distribution of Cd,which can improve the stabilization of Cd in soil.

关 键 词：硅 生物炭 土壤镉污染 赋存形态 稳定化 

分 类 号：TQ424.3[化学工程]