草屑：一种用于从水溶液中去除碱性染料的新型吸附剂。

Grass waste: a novel sorbent for the removal of basic dye from aqueous solution.

作者信息

Hameed B H

机构信息

School of Chemical Engineering, Engineering Campus, University of Science Malaysia, 14300 Nibong Tebal, Penang, Malaysia.

出版信息

J Hazard Mater. 2009 Jul 15;166(1):233-8. doi: 10.1016/j.jhazmat.2008.11.019. Epub 2008 Nov 17.

DOI:10.1016/j.jhazmat.2008.11.019

PMID:19111987

Abstract

The aim of the present work was to investigate the feasibility of grass waste (GW) for methylene blue (MB) adsorption. The adsorption of MB on GW material was studied as a function of GW dose (0.05-1.20 g), solution pH 3-10, contact time and initial concentration (70-380 mg/L). The influence of these parameters on the adsorption capacity was studied using the batch process. The experimental data were analyzed by the Langmuir and Freundlich isotherms. The adsorption isotherm was found to follow the Langmuir model. The monolayer adsorption capacity was found to be 457.640 mg/g. The kinetic data were fitted to the pseudo-first-order and pseudo-second-order models, and were found to follow closely the pseudo-second-order kinetic model. The results revealed that GW adsorbent is potentially low-cost adsorbent for adsorption of MB.

摘要

本研究的目的是探究草废料（GW）用于亚甲基蓝（MB）吸附的可行性。研究了GW材料对MB的吸附作用与GW剂量（0.05 - 1.20 g）、溶液pH值3 - 10、接触时间和初始浓度（70 - 380 mg/L）的关系。采用分批处理法研究了这些参数对吸附容量的影响。实验数据通过朗缪尔和弗伦德里希等温线进行分析。发现吸附等温线符合朗缪尔模型。单层吸附容量为457.640 mg/g。动力学数据拟合到伪一级和伪二级模型，发现其紧密遵循伪二级动力学模型。结果表明，GW吸附剂是一种潜在的低成本MB吸附剂。