Phosphogypsum and cadmium remediation agents:A synergy for mitigating Cd contamination and CH_(4) emissions in rice paddiesOA
Rice paddies,a major anthropogenic source of atmospheric methane(CH_(4)),currently face significant cadmium(Cd)pollution.China has a substantial storage of phosphogypsum intended to enhance arable soil fertility.However,little is known about the impact of phosphogypsum on synergic Cd pollution and CH4 emission in rice paddies.In this study,we conducted a pot experiment to assess the effects of phosphogypsum,combined with Cd remediation agents such as sulfhydryl-modified palygorskite(SMP),bacillus subtilis(BS),and selenium foliar fertilizer(SFF),on soil and rice Cd contents and CH4 emissions.We found that a large amount of phosphogypsum(2250 kg ha^(-1))can significantly reduce the bioavailable Cd content in soils.Combining remediation agents with phosphogypsum effectively reduced Cd levels in brown rice.Phosphogypsum can significantly reduce CH_(4) emissions from rice paddies,resulting in cumulative evasion rates of 255.54-633.63 kg hm^(-2).Our results demonstrate that phosphogypsum paired with Cd remediation agents effectively reduces Cd contamination in brown rice and CH_(4) emissions from rice paddies,providing insights into the synergistic management of heavy metal pollution and greenhouse gas emissions in agricultural environments.
Wangbiao Lu;Chengling Huang;Weijun Luo;Qi Zhang;Xu Huang;Yongcheng Jin;Chen Yao;Xiaowen Li;Guangneng Zeng;Fang Yang;Liang Tang;Shi-Jie Wang
College of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China Puding Karst Ecosystem Research Station,Chinese Academy of Sciences,Puding 562100,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,ChinaCollege of Eco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,China Puding Karst Ecosystem Research Station,Chinese Academy of Sciences,Puding 562100,ChinaResearch Center for Planetary Science,College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China Puding Karst Ecosystem Research Station,Chinese Academy of Sciences,Puding 562100,China
资源环境
Cd·CH_(4)fluxPhosphogypsumRemediation agentsSynergistic effectRice paddy
《Acta Geochimica》 2026 (2)
P.230-241,12
supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB40020200)the National Natural Science Foundation of China(Nos.41663015,42273021)Guizhou Science and Technology Cooperation Basic Project([2020]1Y188)the construction project of Key Laboratory of State Ethnic Affairs Commission([2020]No.91 of DDA office)Foundation of Guizhou Minzu University(GZMU[2019]YB11)the support of the independent deployment project of the State Key Laboratory of Environmental Geochemistry。
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