两性磁化炭添加比例对河流沿岸土吸附Cu^2+的影响  

Effect of Amphoteric-Magnetized Biochar Addition Ratio on Cu^2+Adsorption in Riverbank Soils

作　　者：张乂方 李文斌 朱浪 谢佳 邓红艳 任丽平 孟昭福[2] ZHANG Yi-fang;LI Wen-bin;ZHU Lang;XIE Jia;DENG Hong-yan;REN Li-ping;MENG Zhao-fu(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China;College of Natural Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637009 [2]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《环境监测管理与技术》2021年第1期61-64,共4页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(41271244);四川省教育厅基金资助项目(18ZB0576);四川省科技厅基金资助项目(2018JY0224);南充市科技局基金资助项目(19YFZJ010G)。

摘　　要：将两性(十二烷基二甲基甜菜碱)修饰磁化炭分别以质量分数0、1%和2%加入嘉陵江流域(川渝段)内苍溪(CX)、南部(NB)、嘉陵(JL)和合川(HC)沿岸土中,考察各混合土样对Cu^2+的等温吸附和热力学特征。结果表明:混合土样对Cu^2+的最大吸附量为58.36 mmol/kg~366.85 mmol/kg,添加等量两性磁化炭时各混合土样对Cu^2+吸附量表现为JL>NB>CX>HC的趋势,且添加比越高吸附能力越强。各混合土样对Cu^2+的吸附为自发、吸热和熵增的反应过程,对Cu^2+的吸附量与温度和pH值均呈正相关关系。当离子强度为0.1 mol/L时,各混合土样(除HC外)对Cu^2+的吸附量最大。Amphoteric(dodecyl dimethyl betaine)modified magnetized biochar was added into the riverbank soils in Cangxi(CX),Nanbu(NB),Jialing(JL)and Hechuan(HC)along the Jialing River by 0,1%and 2%mass ratio.The adsorption isotherms and thermodynamic characteristics of Cu^2+in each mixed soil sample were studied.The results indicated that the maximum Cu^2+adsorption amount in mixed soil samples were between 58.36 mmol/kg and 366.85 mmol/kg.Cu^2+adsorption had a trend of JL>NB>CX>HC when adding equivalent amphoteric magnetized biochar to each mixed soil sample.The adsorption capacity increased as the addition ratio increased.The adsorption of Cu^2+in each mixed soil sample was a spontaneous,endothermic and entropy increase reaction process.Cu^2+adsorption was positively correlated with temperature and pH value.When ion strength was 0.1 mol/L,the adsorption amount of Cu^2+in each mixed sample(except HC)was the largest.

关 键 词：CU^2+ 两性磁化炭 吸附量 嘉陵江 河流沿岸土 

分 类 号：X53[环境科学与工程—环境工程]