Effective adsorption of sulfate ions with poly(m-phenylenediamine) in aqueous solution and its adsorption mechanism  

聚间苯二胺对硫酸根离子的吸附及其机理(英文)

作　　者：桑培伦[1] 王云燕[1] 张理源[1] 柴立元[1] 王海鹰[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410017

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第1期243-252,共10页中国有色金属学报（英文版）

基　　金：Project(50925417) supported by China National Funds for Distinguished Young Scientists;Project(50830301) supported by the National Natural Science Foundation of China;Project(2009ZX07212-001-01) supported by Major Science and Technology Program for Water Pollution Control and Treatment of China;Project(2011) supported by Hunan Nonferrous Fundamental Research Fund

摘　　要：Sulfate adsorption by poly（m-phenylenediamine）s（PmPDs） with various oxidation states synthesized through chemically oxidative polymerization was investigated.Series of sorption experiments were conducted,and the adsorption mechanism and the relationship between oxidation state and adsorption performance were studied with the characterization of Fourier transform infrared spectroscopy（FTIR）,X-ray photoelectron spectroscopy（XPS）,pH tracking and energy calculation.The results show that the adsorption performance in acidic solution is improved with the decrease of oxidation state of poly（m-phenylenediamine）（PmPD）.The rate constant is as high as 425.5 mg/（g·min） in the short equilibrium time of 30 min.The estimated highest adsorptivity of sulfate ions is 95.1%.According to the Langmuir equation,the adsorbance is 108.5 mg/g.The sulfate desorption efficiency is about 95% and the accumulative adsorbance is up to 487.95 mg/g in 5 cycles.通过化学氧化聚合法合成具有不同氧化态的聚间苯二胺,将其用于吸附硫酸根离子,进行一系列的吸附实验;通过FTIR、XPS、pH跟踪及能量计算,研究了聚间苯二胺吸附硫酸根离子的机理,探讨了聚间苯二胺的氧化态与吸附性能之间的关系。结果表明:聚间苯二胺的氧化态越低,其对硫酸根离子的吸附性能越好。吸附在30min内达到平衡,吸附速率达425.5mg/(g·min);吸附率最高达到95.1%;通过Langmuir等温线拟合计算出吸附量为108.5mg/g;解析率在95%左右,5次循环吸附实验的累积吸附量达487.95mg/g。

关 键 词：poly（m-phenylenediamine） sulfate ions ADSORPTION adsorption rate oxidation state desorption efficiency 

分 类 号：O647.3[理学—物理化学]