【作者】 张永奇； 杨显万；

【Author】 Zhang Yongqi, Yang Xianwan~* (Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China)

【机构】 昆明理工大学材料与冶金工程学院；

【摘要】 为探讨滇池凤眼莲对水中重金属离子Cu²⁺的吸附特性,考察了pH、时间、吸附剂量、浓度等因素对吸附能力的影响,进行了实验室吸附试验,绘制出吸附等温线.并由Langmuir曲线求出相应参数。对风眼莲进行了脱附-再生实验。分析了吸附机理。结果表明,在pH3.5～5.5范围内.凤眼莲对Cu²⁺有吸附作用,饱和吸附量可达35.6mg/g,吸附等温式为C_f/q=0.027C_f+0.114。用0.5mol/LHCI和NaOH可使其脱附与再生。更多还原

【Abstract】 Adsorption properties of nonliving eichhornia crassipes for copper were studied. The effects of pH, time, the mass of biosorbent and concentration on the adsorption efficiency were examined.From the isotherms, the adsorption equilibrium constant（K） and the maximum adsorption capacity（q_m） in the Langmuir equation were determined. Desorption-regeneration of eichhornia crassipes and mechanism were also studied.The rusults show that the optimum pH value was between 3.5～5.5, the maximum Cu²⁺ uptake capacity was 35.6mg/g , the adsorption isotherms was C_f/q=0.027C_f+0.114. Eichhornia crassipes can be regenerated with a 0.Smol/L HC1 solution and a NaOH solution.更多还原