REMOVAL OF A BASIC DYE FROM AQUEOUS SOLUTION BY ADSORPTION USING RICE HULLS

IF 1 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Global Nest Journal Pub Date : 2011-04-07 DOI:10.30955/gnj.000560

A. El-Maghraby, H. A. E. Deeb

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引用次数: 57

Abstract

The removal of dyes from colored effluents, particularly from textile industries, is one of the major environmental concerns these days. Current methods for removing dyes from wastewaters are costly and cannot effectively be used to treat wide range of such wastewaters. This work describes the use of grounded rice hull as adsorbent material. Aqueous solutions of various methylene blue dye concentrations (5-25 mg l -1 ) were shaken with certain amount of adsorbents to determine the adsorption capacity. Both treated and untreated rice hulls were used for methylene blue adsorption. The effects of adsorbents dose, initial pH, initial dye concentration and contact time on dye removal have been studied. Maximum dye was sequestered from the solution within 60-90 min after the beginning of every experiment. The adsorption capacity increased from 72 to 94 % with increasing the pH from 3 to 10. Pretreatment of rice hulls with citric acid did not reveal any beneficial effect. Rice hulls were more effective compared to commercial used adsorbents used. The results showed that ground rice hulls can be considered as potential adsorbents for methylene blue removal from dilute aqueous solutions.

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用稻壳吸附法从水溶液中去除碱性染料

从有色废水中去除染料，特别是从纺织工业中去除染料，是当今主要的环境问题之一。目前从废水中去除染料的方法成本高，不能有效地用于处理广泛的此类废水。本文介绍了碾碎稻壳作为吸附剂的使用情况。将不同亚甲基蓝染料浓度(5 ~ 25 mg l -1)的水溶液与一定量的吸附剂振荡，测定其吸附量。用处理过和未处理过的稻壳对亚甲基蓝进行吸附。研究了吸附剂用量、初始pH、初始染料浓度和接触时间对染料去除率的影响。每次实验开始后60-90分钟内从溶液中分离出最大的染料。当pH值从3增加到10时，吸附量从72%增加到94%。用柠檬酸预处理稻壳没有显示出任何有益的效果。稻壳比商业上使用的吸附剂更有效。结果表明，碾碎的稻壳可以被认为是一种潜在的去除稀水溶液中亚甲基蓝的吸附剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Global Nest Journal 环境科学-环境科学

CiteScore

1.50

自引率

9.10%

发文量

100

审稿时长

>12 weeks

期刊介绍： Global Network of Environmental Science and Technology Journal (Global NEST Journal) is a scientific source of information for professionals in a wide range of environmental disciplines. The Journal is published both in print and online. Global NEST Journal constitutes an international effort of scientists, technologists, engineers and other interested groups involved in all scientific and technological aspects of the environment, as well, as in application techniques aiming at the development of sustainable solutions. Its main target is to support and assist the dissemination of information regarding the most contemporary methods for improving quality of life through the development and application of technologies and policies friendly to the environment