农业资源与环境学报2018，Vol.35Issue(1)：66-73,8.DOI:10.13254/j.jare.2017.0111
刺桐生物炭对水中氨氮和磷的吸附
The Erythrina Variegate Biochar's Adsorption to NH4+-N and P from Aqueous Solution
摘要
Abstract
The biochar derived from Erythrina Variegate which was pyrolyzed at the temperature of 300 ℃,500 ℃ and 700 ℃ was employed to investigate its adsorption property to NH4+-N and P by kinetics and isothermal adsorption equation.The results of isothermal adsorption model showed that the Langmuir equation fitted the data very well and the adsorption amount increased with the increase of initial concentration of NH4+-N and P.Besides,the BC500 had the best adsorption effect.The results of kinetics model showed that the adsorption process of biochar pyrolyzed at different temperatures to NH4+-N and P were concentrated in the initial 300 min and 60 min,respectively.They all fitted the pseudo-second order kinetic equation well.Besides,in different initial pH,the adsorption effects of biochar to NH4+-N and P in aqueous solutions were pH7＞pH1 1＞pH3 and pH11＞pH7＞pH3,respectively.关键词
生物炭/热解温度/氨氮/磷/吸附Key words
biochar/pyrolysis temperature/ammonia nitrogen/phosphorus/adsorption分类
资源环境引用本文复制引用
刘项,南红岩,安强..刺桐生物炭对水中氨氮和磷的吸附[J].农业资源与环境学报,2018,35(1):66-73,8.基金项目
中央高校基金资助项目(CDJZR14215501) （CDJZR14215501）
