一种新型磁性海泡石/Fe2O3复合材料吸附去除水中铅离子

IF 1.1 4区地球科学 Q4 CHEMISTRY, PHYSICAL

Clay Minerals Pub Date : 2023-08-25 DOI:10.1180/clm.2023.24

Osman Uygun, Ayşenur Murat, Gaye Ö. Çakal

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引用次数: 0

摘要

：铅是最常见的有毒重金属之一，需要立即修复。为了修复废水，粘土矿物是优选的吸附剂。在本研究中，使用生的和铁改性的土耳其海泡石，研究了通过吸附从水溶液中去除铅的方法。本研究的目的是考察改性和环境条件对海泡石样品吸附性能的影响。首先，用矿物学和岩石学方法对共沉淀法制备的海泡石原料（Sep）和磁性海泡石/Fe2O3复合材料（MagSep）进行了表征，并测定了其理化性质。然后，在不同的条件下（溶液pH、吸附剂用量、接触时间、Pb2+初始浓度、温度、振荡速率），考察了铅（Pb2+）在海泡石样品上的分批吸附。在所有实验条件下，MagSep的吸附容量均高于Sep。结果表明，吸附过程遵循准二阶动力学模型，

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A novel magnetic sepiolite/Fe2O3 composite for adsorptive removal of lead(II) ions from aqueous solutions

: Lead is one of the most frequently encountered toxic heavy metals that requires immediate remediation. To remediate wastewater, clay minerals are the preferred adsorbents. In this study, the removal of lead from aqueous solutions via adsorption was investigated using raw and iron-modified Turkish sepiolite. The aim of this study was to examine the effect of modification and environmental conditions on the sorptive properties of sepiolite samples. Initially, the raw sepiolite (Sep) and magnetic sepiolite/Fe 2 O 3 composite (MagSep) prepared by the co-precipitation method were characterized using mineralogical and petrographical means, and the physico-chemical properties were determined. Then, the batch adsorption of lead (Pb 2+ ) ions on the sepiolite samples were examined under various conditions (solution pH, adsorbent dosage, contact time, initial Pb 2+ ion concentration, temperature, shaking rate). The adsorption capacity of MagSep was found to be higher than that of Sep under all experimental conditions. The results showed that the adsorption process followed a pseudo-second-order kinetic model,

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来源期刊

Clay Minerals 地学-矿物学

CiteScore

3.00

自引率

20.00%

发文量

审稿时长

6 months

期刊介绍： Clay Minerals is an international journal of mineral sciences, published four times a year, including research papers about clays, clay minerals and related materials, natural or synthetic. The journal includes papers on Earth processes soil science, geology/mineralogy, chemistry/material science, colloid/surface science, applied science and technology and health/ environment topics. The journal has an international editorial board with members from fifteen countries.