生态环境学报Issue(5)：897-903,7.
生物炭-锰氧化物复合材料对红壤吸附铜特性的影响
Effects of biochar-manganese oxides composite on adsorption characteristics of Cu in red soil
摘要
Abstract
As the modified material, manganese oxide used in manufacturing composite is a hot research topic for environmental field. The manganese oxide modified composite was widely applied to water treatment, air fresheners, and so on. However, there were few reports on changing sorption characteristics of copper in soil with biochar-manganese oxide composite as adsorption materials. In the present study, the sorption batch experiments were employed to investigate the effects of biochar-manganese oxides composite on copper sorption in red soils. Freundlich equation was used to characterize the sorption of copper and calculate distribution coefficients. The results showed that the adsorption of Cu increased significantly by adding biochar-manganese oxides composite. Compared to the non biochar-manganese oxides composite system, the percentages of Cu adsorption increased 63.1%, 130%, 310%, and 509% with adding 0.5%, 1.0%, 2.0%, and 4.0% of biochar-manganese oxides, and their distribution coefficient (Kf) were 0.176, 0.286, 0.653, and 0.800, respectively. Among all dosages, the distribution coefficients were five times at 4.0% of biochar-manganese oxides higher than that at no adding composite materials. There was little effect on red soil pH value after adding biochar-manganese oxide composite, while, the CEC (Cation Exchange Capacity) were great influenced, especially, the dosage of biochar-manganese oxide composite was 4.0%, and CEC was 5.59 cmol.kg-1, increasing by 14.1%. The absorption peak were measured at 1034.63, 537.22, 471.45 cm-1 and the activity functional groups such as -OH, Mg-O, Si-O increased significantly in red soil after adding biochar-manganese oxide composite. Due to the complex such as Mg-O-Cu- and Si-O-Cu- were formed in red soil surface, the copper adsorption capacity of red soil was improved. It was demonstrated that biochar-manganese oxide composite could be considered as a promising material to immobilize heavy metal-contaminated soils.关键词
生物炭-锰氧化物复合材料/铜/红壤/吸附Key words
biochar-manganese oxides composite/copper/red soil/adsorption分类
资源环境引用本文复制引用
于志红,谢丽坤,刘爽,杨姗姗,廉菲,宋正国..生物炭-锰氧化物复合材料对红壤吸附铜特性的影响[J].生态环境学报,2014,(5):897-903,7.基金项目
国家863项目子课题（2012AA101404-5）；国家自然科学基金项目 （）
