改性橘皮粉对Cu2＋和Ni2＋的吸附行为研究

Study on Adsorption of Cu^(2+) and Ni^(2+) by Modified Orange Peel

橘皮粉用环氧化氯丙烷改性后再与DTPA-γ-Fe_2O_3复合,得到一种对重金属离子Cu^(2+)和Ni^(2+)有较强吸附能力的杂化材料.探讨了pH值、温度、时间等因素对其吸附性能的影响.结果表明:该材料对Cu2+和Ni 2+的最大吸附量分别为107.30mg/g和63.69mg/g,吸附为二级动力学过程,符合Langmuir等温吸附模型.

ECH and DTPA-γ-Fe2O3 modified orange peel（OP）was prepared to improve its adsorption capacity for heavy metal ion such as Cu2＋and Ni 2＋.The biosorption of nickel and copper ions from aqueous solution by dried composite particles was studied as function of pH,temperature and adsorption time.From Langmuir isotherm,the adsorption capacity for Cu^（2＋） and Ni^（2＋） were 107.30 mg/g and 63.69 mg/g.The adsorption of Cu2＋and Ni 2＋obeyed the pseudo-second-order kinetics.The metal adsorption data were fitted well with Langmuir isotherms.