改性木质素磺酸钠对铅离子的吸附行为研究

发布时间：2017-12-31 21:03

本文关键词：改性木质素磺酸钠对铅离子的吸附行为研究　出处：《武汉工程大学学报》2017年01期 　论文类型：期刊论文

【摘要】：研究了过氧化氢氧化和亚硫酸钠磺化改性后的木质素磺酸钠对水溶液中铅离子的吸附性能.分别考察了溶液pH值、初始浓度、吸附时间、温度对吸附性能的影响.实验结果表明,在溶液pH值为1.5-5时,改性木质素磺酸钠对铅离子的平衡吸附量随着pH值的增大而变大;改性木质素磺酸钠对铅离子的平衡吸附量随着温度的升高增加不明显.在最佳吸附pH值下,改性木质素磺酸钠对铅离子的吸附量随着溶液初始浓度的增加而增大,120 min达到吸附平衡时,铅的饱和吸附量可达到55.22 mg/g.改性木质素磺酸钠对铅离子的静态吸附过程较好地符合Langmuir等温吸附模型,吸附过程符合准一级动力学模型.
[Abstract]:The adsorption properties of sodium lignosulfonate modified by hydrogen peroxide and sodium sulfite on lead ion in aqueous solution were studied. The pH value, initial concentration and adsorption time of the solution were investigated. The experimental results show that the equilibrium adsorption capacity of the modified sodium lignosulfonate on lead ion increases with the increase of pH value when the pH value of the solution is 1.5-5. The equilibrium adsorption capacity of modified sodium lignosulfonate on lead ion was not obvious with the increase of temperature. The adsorption capacity of modified sodium lignosulfonate on lead ion increases with the increase of initial concentration of solution and reaches adsorption equilibrium at 120 min. The saturated adsorption capacity of lead can reach 55.22 mg / g. The static adsorption process of modified sodium lignosulfonate on lead ion is in accordance with the Langmuir isothermal adsorption model. The adsorption process accords with the quasi first order kinetic model.
【作者单位】：武汉工程大学化学与环境工程学院;武汉工程大学化工与制药学院;
【基金】：湖北省自然科学基金(2014CFA115)
【分类号】：O647.3;X703
【正文快照】： 随着社会经济快速发展,人们对自然资源的渴求和工业产品的需求在逐年增长,随之而生的废弃物对环境的污染也越来越严重,其中废弃重金属污染物因其难消解和剧毒性对环境污染尤甚.已有报道指出,每年大气中的重金属污染释放铅的含量高达288 700 t~37 600 t;与此同时,含有大量未经

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