Adsorption of Pb(II), Cd(II), Ni(II) and Cu(II) onto natural kaolinite clay
Adsorption of Pb(II), Cd(II), Ni(II) and Cu(II) onto natural kaolinite clay
复制标题
天然高岭土对 Pb(II)、Cd(II)、Ni(II) 和 Cu(II) 的吸附
DOI：
10.1016/j.desal.2009.11.005
复制
发表时间：
2010-03-01
期刊：
影响因子：
9.9
通讯作者：
Chen, Zu-liang
中科院分区：
文献类型：
--
作者：
Jiang, Ming-qin;Jin, Xiao-ying;Chen, Zu-liang
研究了龙岩高岭土对废水中重金属离子的去除效果。因此，本研究包括吸附的铅（II），镉（II），镍（II）和铜（II）在水溶液中的高岭石粘土通过在各种条件下的吸附过程（与可变浓度的金属离子，粘土量，pH值和混合时间）。提高pH值有利于金属离子的去除，直到它们沉淀为不溶性氢氧化物。的吸收是快速的最大吸附被观察到在30分钟内为铅（II），镉（11），镍（II）和铜（II）。吸附等温线的拟合结果表明，Freundlich方程比Langmuir方程更能拟合吸附等温线。此外，XRD图谱证实该高岭石粘土样品主要是高岭石和伊利石粘土的混合物。样品的SEM图像显示出不规则的表面形貌。最后，将该高岭石粘土用于从真实的废水中去除金属离子，例如Pb（II），其中其浓度从160.00 mg/L降低到8.00 mg/L。(C)2009 Elsevier B. V.保留所有权利。
Kaolinite clay obtained from Longyan, China was investigated to remove heavy metal ions from wastewater. Thus, the present study includes the adsorption of Pb(II), Cd(II), Ni(II) and Cu(II) in aqueous solution on kaolinite clay through the process of adsorption under various conditions (with variable concentration of metal ion, amount of clay, pH and mixing time). Increasing pH favours the removal of metal ions till they are precipitated as the insoluble hydroxides. The uptake is rapid with maximum adsorption being observed within 30 min for Pb(II), Cd (11), Ni(II) and Cu(II). In addition, the results obtained from adsorption isotherm indicated that these data can be better fitted with the Freundlich equation than the Langmuir equation. Furthermore, the XRD patterns confirmed that this kaolinite clay sample is mainly a mixture of kaolinite and illite clays. The SEM images of samples showed irregular surface morphology. Finally, this kaolinite clay was used for removing metal ions from real wastewater such as Pb(II), where its concentration was reduced from 160.00 to 8.00 mg/L. (C) 2009 Elsevier B.V. All rights reserved.