吉首大学学报（自然科学版）2024，Vol.45Issue(3)：55-62,8.DOI:10.13438/j.cnki.jdzk.2024.03.008
改性玉米芯生物炭对废水中磷酸根态磷的吸附
Performance Study of Modified Biochar for Phosphorus Adsorption in Water Bodies
摘要
Abstract
Modified charcoal(MCC)was made from corn cobs pretreated by NH3·H2O and impregnated with MgCl2·6H2O.The morphology and functional groups of MCC was characterized,and its impact on phosphate phosphorus adsorption was investigated.The results showed that MCC had a more porous structure,with a BET surface area of 2.04 times that of pristine biochar.Additionally,MCC had more carbonyl functional groups,and a higher capacity for phosphorus adsorption.When the initial phosphorus concentration was 40 mg/L,the phosphorous adsorption by MCC reached 16.59 mg/g.In simulated ad-sorption,the ideal adsorption conditions were found to be at pH 6 and 25 ℃.When the initial phosphorus concentration is between 0 and 60 mg/L,the adsorption capacity of MCC increases with the increase in phosphorus content.The adsorption process followed the pseudo-secondary kinetic model and the Lang-muir and Freundlich models,with both single molecular layer chemical adsorption and multi molecular layer physical adsorption.The theoretical saturation adsorption capacity of 32.60 mg/g demonstrated the potential for phosphorus removal from wastewater.关键词
生物炭/改性/吸附/磷酸盐Key words
biochar/modification/adsorption/phosphorus分类
资源环境引用本文复制引用
李洁,李波,张孝东,李斌,周影茹..改性玉米芯生物炭对废水中磷酸根态磷的吸附[J].吉首大学学报（自然科学版）,2024,45(3):55-62,8.基金项目
国家自然科学基金资助项目(41661096) （41661096）
湖南省教育厅项目(19C1542) （19C1542）
2021年湖南省大学生创新创业训练项目(2954) （2954）
