摘要
通过研究生物炭与羟基磷灰石及生物肥复配施用对土壤重金属Cu、Cd和Pb可交换态及碳酸盐结合态的影响,探究不同钝化剂配方对污染土壤重金属的钝化效果。结果表明:(1)添加了不同配比的生物炭与羟基磷灰石均能提高土壤pH值和降低土壤中重金属Cu、Cd和Pb可交换态含量;(2)在45d钝化期,生物炭与羟基磷灰石配比为2∶1和4∶1时,对土壤中Cu、Cd和Pb的钝化率相对较高,其中配比为4∶1时,钝化率分别达到了75.4%、31.9%和73.6%;(3)在45d钝化期,生物炭与羟基磷灰石配比为2∶1和4∶1时,对土壤中Cu、Cd和Pb3种重金属的生物可利用率影响较为显著,生物可利用率相对较低;生物炭与羟基磷灰石配比为4∶1时,土壤中生物可利用率分别为15.0%、44.3%、28.4%。
This paper studied the effects of biochar,hydroxyapatite and biofertilizer on the exchangeable and carbonate binding states of soil heavy metals Cu,Cd and Pb,and explored the passivation effects of different passivation agent formulations on heavy metals in contaminated soil.Results showed that:(1)the addition of biochar and hydroxyapatite in different proportions could both increase the soil pH and reduce the exchangeable content of Cu,Cd and Pb in the soil.(2)During the 45 d passivation period,when the ratio of biochar and hydroxyapatite was 2 ∶1 and 4 ∶1,the passivation rates of Cu,Cd and Pb in soil were relatively high.When the ratio was 4 ∶1,the passivation rates were 75.4%,31.9% and 73.6%,respectively.(3)During the 45 d passivation period,when the ratio of biochar and hydroxyapatite was 2 ∶1 and 4 ∶1,the bioavailability of Cu,Cd and Pb in soil was significantly affected,and the bioavailability was relatively low.When the ratio of biochar and hydroxyapatite was 4 ∶1,the bioavailability in soil was 15.0%,44.3% and 28.4%,respectively.
作者
邵帅
刘盛萍
曾秋勇
岳梅
闻高志
SHAO Shuai;LIU Sheng-ping;ZENG Qiu-yong;YUE Mei;WEN Gao-zhi(Department of Biological and Environmental Engineering,Hefei University,Hefei 230601,China;Anhui Collaborative Innovation Center for Environmental Pollution Prevention and Control and Ecological Restoration,Hefei 230601,China;Donghua Engineering Technology Co.,Ltd.,Hefei 230022,China)
出处
《环境生态学》
2019年第6期75-80,共6页
Environmental Ecology
基金
合肥学院“国家自然基金后续研究项目”(1800070928)
合肥学院院级重大项目(16ZR04ZDA)
2019年合肥学院研究生创新项目(CX201902)资助
关键词
生物炭
羟基磷灰石
土壤
重金属
钝化效果
biochar
hydroxyapatite
soil
heavy metals
passivation effect
