Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul, Tamil Nadu 624 302, India; Department of Chemistry, Pocker Sahib Memorial Orphanage College, Tirurangadi, Malappuram, Kerala 676306, India.
Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul, Tamil Nadu 624 302, India.
Int J Biol Macromol. 2020 Oct 15;161:1117-1126. doi: 10.1016/j.ijbiomac.2020.06.103. Epub 2020 Jun 15.
The discharge of organic dyes into the aquatic environment is a serious problem owing to the persistence of possible health risks and ecological hazards of these pollutants. This paper reports a facile method for the preparation of composite material consisting of lanthanum incorporated carboxymethylcellulose-bentonite (LCB) composite and utilized for the removal of Indigo Carmine (IC), Acid Blue 158 (AB158) and Reactive Blue 4 (RB4) dyes from water by batch adsorption techniques. The optimal conditions for the dye adsorption were found to be pH = 3, initial dye concentration: 50 mg/L and adsorbent dosage of 100 mg. The adsorption efficiency of IC, AB158 and RB4 dye molecules were 80.41%, 83.54% and 86.91% respectively. The entire adsorption process was completed within 40 min. The adsorption data fits well with the pseudo-second-order kinetic model, demonstrating the physico-chemical adsorption of the dyes on LCB matrix. The Langmuir, Freundlich, and D-R isotherm models were used to describe saturation point. The fabricated adsorbent material was characterized using PXRD, FTIR, SEM-EDAX, TGA-DSC and surface area measurements. The thermodynamic studies revealed that the adsorption was spontaneous and endothermic in nature. The LCB composite showed remarkable adsorption-desorption efficiency for dye removal in water/wastewater treatment process; hence it can be considered as a competent and potential adsorbent for dye removal.
将有机染料排放到水生环境中是一个严重的问题，因为这些污染物可能存在健康风险和生态危害。本文报道了一种简便的方法，用于制备由镧掺入羧甲基纤维素-膨润土（LCB）复合材料组成的复合材料，并利用该复合材料通过批式吸附技术从水中去除靛蓝胭脂红（IC）、酸性蓝 158（AB158）和活性蓝 4（RB4）染料。发现染料吸附的最佳条件为 pH = 3、初始染料浓度：50 mg/L 和吸附剂用量为 100 mg。IC、AB158 和 RB4 染料分子的吸附效率分别为 80.41%、83.54%和 86.91%。整个吸附过程在 40 分钟内完成。吸附数据与准二级动力学模型拟合良好，表明染料在 LCB 基质上的物理化学吸附。Langmuir、Freundlich 和 D-R 等温线模型用于描述饱和点。使用 PXRD、FTIR、SEM-EDAX、TGA-DSC 和表面积测量对制备的吸附剂材料进行了表征。热力学研究表明，吸附是自发的和吸热的。LCB 复合材料在水/废水处理过程中显示出出色的吸附-解吸效率；因此，它可以被认为是一种有竞争力和有潜力的染料去除吸附剂。
