基施钢渣及生物炭结合水分管理阻控水稻镉砷吸收研究  

Mitigation of cadmium and arsenic in rice plant by soil application of steel slag and/or biochar with water management

作　　者：曹健 陈喆[2] 吴箐[1] 吴灼浩[2] 董汉英 姚爱军[1,4] 仇荣亮[2,3,4] 王诗忠[2,3,4] 何尔凯[2,3,4] 汤叶涛[2,3,4] CAO Jian;CHEN Zhe;WU Qing;WU Zhuo-hao;DONG Han-ying;YAO Ai-jun;QIU Rong-liang;WANG Shi-zhong;HE Er-kai;TANG Ye-tao(School of Geography and Planning,Sun Yat-Sen University,Guangzhou 510275,China;School of Environmental Science and Engineering,Sun Yat-Sen University,Guangzhou 510275,China;Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology,Guangzhou 510275,China;The Joint Soil Remediation Research Center of Sun Yat-Sen University and Topcent Enviro Group LTD,Dongguan 523000,China)

机构地区：[1]中山大学地理科学与规划学院,广州510275 [2]中山大学环境科学与工程学院,广州510275 [3]广东省环境污染控制与修复技术重点实验室,广州510275 [4]中山大学-致胜土壤环境修复研究中心,广东东莞523000

出　　处：《农业环境科学学报》2018年第7期1475-1483,共9页Journal of Agro-Environment Science

基　　金：国家重点研发计划项目(SQ2018YFD0800);国家科技支撑计划课题(2015BAD05B05);广州市科技计划项目(201607010065);高等学校学科创新引智计划(B18060)~~

摘　　要：采用土柱实验和田间实验,研究了不同水分管理、基施钢渣及生物炭对稻田-水稻系统中镉砷污染同时阻控的效果。土柱实验结果表明,持续性淹水(CF)降低了Cd的生物有效性,但显著提高了As在土壤中的溶出,钢渣显著提高了土壤p H,降低了土壤Eh,并同时降低了Fe和Cd的溶解,增加了土壤溶液中Mn和As的含量。田间实验结果表明,糙米中Cd和As的含量呈显著负相关(R=-0.838,P<0.05)。好氧环境下,基施钢渣及生物炭(A+SS、A+SS+BC)无法抑制Cd在稻米中的积累,而持续性淹水环境下基施钢渣和生物炭(CF+SS+BC)对水稻Cd和As具有同时阻控的效果,这或可成为水稻镉砷同时阻控的配套技术。Simultaneous mitigation of cadmium(Cd)and arsenic(As)in rice grain has been a great challenge,in contaminated paddy soilrice system.Here,a soil column experiment and a field experiment were conducted to investigate the optimal mitigation strategies on Cd and As contaminated paddy soil by soil application of steel slag and/or biochar with water managements.Soil column experimental results showed that continuous flooding(CF)decreased Cd but increased As concentrations in soil solutions.Soil application of steel slag(SS)significantly increased soil pH but decreased soil Eh.Meanwhile,SS treatment reduced the Fe/Cd concentrations but increased Mn/As concentrations in soil solutions.The field trial data showed that there was a significant negative correlation(R=-0.838,P<0.05)between brown rice Cd and brown rice As.The results indicate that aerobic condition could not reduce Cd accumulation in rice grain.However,soil application of steel slag and biochar with continuous flooding condition(CF+SS+BC)had the best mitigation effect on both Cd and As concentrations(rice Cd reduced by 80%and rice As kept unchanged)in rice grain simultaneously.Hence it could be one of the effective strategies to mitigate Cd and As accumulation in rice plant.

关 键 词：钢渣 镉 砷 水稻 水分管理 阻控 

分 类 号：X53[环境科学与工程—环境工程]