Gupta Vinod K, Mittal Alok, Jain Rajeev, Mathur Megha, Sikarwar Shalini
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, (UA) India.
J Colloid Interface Sci. 2006 Nov 1;303(1):80-6. doi: 10.1016/j.jcis.2006.07.036. Epub 2006 Aug 24.
Textile effluents are major industrial polluters because of high color content, about 15% unfixed dyes and salts. The present paper is aimed to investigate and develop cheap adsorption methods for color removal from wastewater using waste materials activated carbon and activated rice husk-as adsorbents. The method was employed for the removal of Safranin-T and the influence of various factors such as adsorbent dose, adsorbate concentration, particle size, temperature, contact time, and pH was studied. The adsorption of the dye over both the adsorbents was found to follow Langmuir and Freundlich adsorption isotherm models. Based on these models, different useful thermodynamic parameters have been evaluated for both the adsorption processes. The adsorption of Safranin-T over activated carbon and activated rice husks follows first-order kinetics and the rate constants for the adsorption processes decrease with increase in temperature.
纺织废水是主要的工业污染源，因为其含有高色度、约15%的未固定染料和盐分。本文旨在研究和开发使用废料活性炭和活性稻壳作为吸附剂从废水中去除颜色的廉价吸附方法。该方法用于去除番红T，并研究了各种因素如吸附剂剂量、吸附质浓度、粒径、温度、接触时间和pH值的影响。发现染料在两种吸附剂上的吸附均遵循朗缪尔和弗伦德里希吸附等温线模型。基于这些模型，已对两种吸附过程评估了不同有用的热力学参数。番红T在活性炭和活性稻壳上的吸附遵循一级动力学，且吸附过程的速率常数随温度升高而降低。
