Characteristics of Heavy Metals Adsorption Cu, Pb and Cd Using Synthetics Zeolite Zsm-5

Journal of Tropical Soils Pub Date : 2015-05-01 DOI:10.5400/jts.2015.v%.2.77-83

Priyadi, Iskandar, Suwardi, R. Mukti

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引用次数: 10

Abstract

It is generally known that zeolite has potential for heavy metal adsorption. The objectives of this study were to synthesize and characterize zeolite ZSM-5 and to figure out the adsorption capacity of zeolite ZSM-5 for heavy metals of Cu2+, Pb2+ and Cd2+. Characterization of zeolite ZSM-5 included some variables i.e. crystal structure (XRD), morphology (SEM), specific surface area and total pore volume (N2 physisorption). Adsorption capacity of zeolite ZSM-5 was analysed using a batch system with heavy metals of Cu2+, Pb2+ and Cd2+ in various concentrations (50, 100, 150, 200 and 250 ppm) with contact times 30, 60, 90, 120 and 250 minutes. Adsorption data was calculated by Langmuir and Freundlich isotherm. The results showed that the maximum adsorption capacity of zeolite ZSM-5 against heavy metals of Pb2+, Cu2+, and Cd2+, were 74.07, 69.93 and 60.24 mg g-1, respectively. These indicated that synthetic zeolite ZSM-5 had potential to adsorb heavy metals. The results also suggested that the adsorption capacity was affected by the pore size of zeolite, negative charge of zeolite, diameter of hydrated and electronegative ion.

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合成沸石Zsm-5吸附重金属Cu、Pb和Cd的特性

众所周知，沸石具有吸附重金属的潜力。本研究的目的是合成并表征ZSM-5沸石，并测定ZSM-5沸石对重金属Cu2+、Pb2+和Cd2+的吸附能力。ZSM-5分子筛的表征包括晶体结构(XRD)、形貌(SEM)、比表面积和总孔容(N2物理吸附)等变量。采用间歇式吸附系统对不同浓度(50、100、150、200和250 ppm)的重金属Cu2+、Pb2+和Cd2+的吸附性能进行了分析，吸附时间分别为30、60、90、120和250 min。吸附数据采用Langmuir和Freundlich等温线计算。结果表明:ZSM-5分子筛对重金属Pb2+、Cu2+和Cd2+的最大吸附量分别为74.07、69.93和60.24 mg g-1;说明ZSM-5型合成沸石具有吸附重金属的潜力。结果还表明，沸石的孔径、沸石的负电荷、水合离子和电负离子的直径对吸附能力有影响。

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来源期刊

Journal of Tropical Soils

自引率

0.00%

发文量

审稿时长

18 weeks