Panda Gopal C, Das Sujoy K, Guha Arun K
Department of Biological Chemistry, Indian Association for the Cultivation of Science, 2A & B Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
J Hazard Mater. 2009 May 15;164(1):374-9. doi: 10.1016/j.jhazmat.2008.08.015. Epub 2008 Aug 15.
Jute stick powder (JSP) has been found to be a promising material for adsorptive removal of congo red (C.I. 22120) and rhodamine B (C.I. 45170) from aqueous solutions. Physico-chemical parameters like dye concentration, solution pH, temperature and contact time have been varied to study the adsorption phenomenon. Favorable adsorption occurs at around pH 7.0 whereas temperature has no significant effect on adsorption of both the dyes. The maximum adsorption capacity has been calculated to be 35.7 and 87.7mg/g of the biomass for congo red and rhodamine B, respectively. The adsorption process is in conformity with Freundlich and Langmuir isotherms for rhodamine B whereas congo red adsorption fits well to Langmuir isotherm only. In both the cases, adsorption occurs very fast initially and attains equilibrium within 60min. Kinetic results suggest the intra-particle diffusion of dyes as rate limiting step.
黄麻杆粉（JSP）已被发现是一种从水溶液中吸附去除刚果红（C.I. 22120）和罗丹明B（C.I. 45170）的有前景的材料。已改变诸如染料浓度、溶液pH值、温度和接触时间等物理化学参数来研究吸附现象。在pH约7.0时发生有利吸附，而温度对两种染料的吸附没有显著影响。计算得出，对于刚果红和罗丹明B，生物质的最大吸附容量分别为35.7和87.7mg/g。吸附过程符合罗丹明B的弗伦德利希等温线和朗缪尔等温线，而刚果红吸附仅很好地符合朗缪尔等温线。在这两种情况下，吸附最初都非常快，并在60分钟内达到平衡。动力学结果表明染料的颗粒内扩散是限速步骤。
