文章摘要
龚磊,刘倩,戴润英,魏玲,刘光斌,黄忠,刘长相.柚皮粉复合高吸水树脂吸附溶液中Cu2[J].精细化工,2019,36(8):
柚皮粉复合高吸水树脂吸附溶液中Cu2
Research on behaviors and mechanism of Pomelo Peel Powder Composite Superabsorbent Absorbing Cu2 in Solution
投稿时间:2018-08-27  修订日期:2019-03-01
DOI:
中文关键词: 柚皮粉  高吸水树脂  铜离子  吸附机理
英文关键词: pomelo peel powder  superabsorbent resin  copper ion  adsorption mechanism
基金项目:国家自然科学基金项目(地区基金)
作者单位E-mail
龚磊 江西农业大学 lgong_jxau@126.com 
刘倩 江西农业大学  
戴润英 江西农业大学  
魏玲 江西农业大学  
刘光斌 江西农业大学  
黄忠 江西农业大学  
刘长相 江西农业大学  
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中文摘要:
      研究了柚皮粉接枝聚丙烯酸-聚丙烯酰胺复合高吸水树脂(PP-SA)对Cu2 的吸附行为及机理。考察了吸附时间及硫酸铜初始质量浓度对PP-SA铜离子吸附容量的影响,并对其吸附Cu2 过程进行了热力学等温线及动力学方程拟合,应用X射线光电子能谱(XPS)及热重分析(TG)技术对吸附Cu2 溶液饱和的PP-SA做了表征,探讨了其吸附Cu2 机理。结果表明硫酸铜初始质量浓度为2000 mg/L时PP-SA铜离子吸附容量最大,可达199.3 mg/g,吸附约4 h即达饱和;PP-SA对Cu2 的吸附等温线符合Langmuir吸附等温式,吸附动力学符合准二级动力学方程;PP-SA对Cu2 的吸附主要通过离子交换、螯合作用及静电吸引实现,被吸附的铜物种以Cu2 形式存在,其中有小部分CuSO4。
英文摘要:
      Adsorption behaviors and mechanism of Cu2 in solution by Pomelo peel powder composite superabsorbent (PP-SA) were studied. The influences of intial CuSO4 concentration and adsorption time on Cu2 adsorption capacity of PP-SA were investigated. The thermodynamic adsorption isotherms and adsorption kinetics models were adopted to fit the data. PP-SA saturated with Cu2 was characterized by X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TG) and the adsorption mechanisms were proposed. The results showed that the adsorption capacity of Cu2 for PP-SA in 2000 mg/L CuSO4 solution was the highest, reaching to 199.3 mg/g in about 4 h. The Cu2 adsorption process followed the pseudo-second-order kinetic model and the data were fitted to the Langmuir isotherms. The Cu2 adsorption on PP-SA can be achieved by ion exchange adsorption, chelation and electrostatic attraction. The copper species absorbed in PP-SA exist as Cu2 , a small part of which is CuSO4.
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