Purification of metal electroplating waste waters using zeolites
Purification of metal electroplating waste waters using zeolites
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DOI：
10.1016/j.watres.2003.08.009
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发表时间：
2003-12-01
期刊：
影响因子：
12.8
通讯作者：
Querol, X
中科院分区：
文献类型：
--
作者：
Alvarez-Ayuso, E;García-Sánchez, A;Querol, X
为了考虑将天然（斜发沸石）和合成（NaP1）沸石应用于金属表面处理废水的净化，研究了它们对Cr(III)、Ni(II)、Zn(II)、Cu(II)和Cd(II)的吸附行为。采用分批法，溶液中金属浓度范围为10 - 200 mg/L，固液比范围为2.5 - 10 g/L。发现朗缪尔模型能够很好地描述所有吸附过程，从而可以确定金属吸附顺序，并由此推断出每种金属所涉及的主要吸附机制。合成沸石的吸附容量（b(Cr)=0.838 mmol/g，b(Ni)=0.342 mmol/g，b(Zn)=0.499 mmol/g，b(Cu)=0.795 mmol/g，b(Cd)=0.452 mmol/g）约为天然沸石（b(Cr)=0.079 mmol/g，b(Ni)=0.034 mmol/g，b(Zn)=0.053 mmol/g，b(Cu)=0.093 mmol/g，b(Cd)=0.041 mmol/g）的10倍，因此似乎更适合用于金属废水净化过程。这种矿物在用于金属电镀废水净化时也显示出相同的高吸附容量值。（C）2003爱思唯尔有限公司。保留所有权利。
The sorption behaviour of natural (clinoptilolite) and synthetic (NaP1) zeolites has been studied with respect to Cr(Ill), Ni(II), Zn(II), Cu(II) and Cd(II) in order to consider its application to purify metal finishing waste waters. The batch method has been employed using metal concentrations in solution ranged from 10 to 200 mg/l and solid/liquid ratios ranged from 2.5 to 10 g/1. The Langmuir model was found to describe well all sorption processes, allowing to establish metal sorption sequences from which the main retention mechanism involved for each metal has been inferred. Synthetic zeolite exhibited about 10 times greater sorption capacities (b(Cr) = 0.838 mmol/g, b(Ni) = 0.342 mmol/g, b(Zn) = 0.499 mmol/g, b(Cu) = 0.795 mmol/g, b(Cd) = 0.452 mmol/g) than natural zeolite (b(Cr) = 0.079 mmol/g, b(Ni) = 0.034 mmol/g, b(Zn) = 0.053 mmol/g, b(Cu) = 0.093 mmol/g, b(Cd) = 0.041 mmol/g), appearing, therefore, as most suitable to perform metal waste water purification processes. This mineral showed the same high sorption capacity values when used in the purification of metal electroplating waste waters. (C) 2003 Elsevier Ltd. All rights reserved.