【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Cu²⁺的等温吸附和热力学特征。结果表明:混合土样对Cu²⁺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Cu²⁺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Cu²⁺的吸附为自发、吸热和熵增的反应过程,对Cu²⁺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Cu²⁺的吸附量最大。更多还原

【Abstract】 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 Cu²⁺in each mixed soil sample were studied. The results indicated that the maximum Cu²⁺adsorption amount in mixed soil samples were between 58.36 mmol/kg and 366.85 mmol/kg. Cu²⁺ 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 Cu²⁺ in each mixed soil sample was a spontaneous, endothermic and entropy increase reaction process. Cu²⁺ adsorption was positively correlated with temperature and pH value. When ion strength was 0.1 mol/L, the adsorption amount of Cu²⁺ in each mixed sample（except HC） was the largest.更多还原