The potential use of low-grade phosphate rocks as adsorbent

被引：0

作者：

Chemical Engineering Department, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan ^{[1
]}

机构：

来源：

Chemical Engineering and Technology | 2002年 / 25卷 / 09期

关键词：

Adsorbents - Adsorption - Copper - Sodium chloride;

D O I：

10.1002/1521-4125(20020910)25:93.0.CO;2-G

中图分类号：

学科分类号：

摘要：

This study evaluates the suitability of using low-grade phosphate for Cu2+ removal. The study also investigates the effects of the presence of ethylene-diamine-tetra-acetic acid (EDTA), citric acid, tartaric acid and sodium chloride in a solution containing Cu2+ on the adsorption capacity of Cu2+ onto low-grade phosphate. For aqueous solutions with 100 ppm Cu2+, the percentage removal of Cu2+ at pH 4 onto 0.2 g of 0.063 mm low-grade phosphate was found to be 96.6% after one hour. Using one mmol of either Cu2+, Cu-NaCl, Cu-tartaric acid, Cu-EDTA, or Cu-citric acid aqueous solutions, the present work shows trend of the percentage removal of Cu2+ at equilibrium time: Cu2+ > Cu-NaCl > Cu-tartaric acid > Cu-EDTA > Cu-citric acid. It is also found that increasing the concentration of ligand to copper ratio decreases the percentage removal of Cu2+ significantly. This means that the adsorption capacity is ligand type and concentration dependent.

引用

页码：921 / 924

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