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| Effects of biochar derived from Sargassum fusiforme on the properties and cadmium forms of cadmium-contaminated soil |
| Received:October 31, 2017 |
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| KeyWord:Sargassum fusiforme;Cd-contaminated soil;biochar;speciation;passivation effect |
| Author Name | Affiliation | E-mail | | WANG Yu-ying | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou 310021, China | | | JI Hai-yang | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China | | | LÜ Hao-hao | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou 310021, China | | | LIU Yu-xue | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou 310021, China | | | YANG Rui-qin | Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China
Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Product, Hangzhou 310023, China | | | YANG Sheng-mao | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou 310021, China
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China | yangshengmao@263.net |
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| Abstract: |
| In order to investigate the effect of biochar on the physicochemical property and cadmium(Cd) forms present in Cd-contaminated soil, three biochars derived from Sargassum fusiforme, rice straw, and pecan shell were prepared. Thereafter, the Cd adsorption abilities of these biochars were investigated. After applying different dosages of biochar on the Cd-contaminated soil, the changes in physicochemical property and chemical forms of Cd were studied. The results showed that the biochar derived from Sargassum fusiforme displayed the best Cd adsorption ability. Meanwhile, the pH, available phosphorus, rapidly available potassium, total nitrogen, and organic matter content increased along with the dosage of biochar. In addition, all dosages of biochar could decrease the content of exchangeable Cd and enhance the formation of carbonate-bound Cd, Fe-Mn oxide-bound Cd, organic-bound Cd, and residual form of Cd. In summary, biochar application decreased the bioavailability of Cd, and reduced the harmful forms of Cd. |
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