Removal of basic dyes auramine yellow and auramine O by halloysite nanotubes
Removal of basic dyes auramine yellow and auramine O by halloysite nanotubes
复制标题
DOI：
10.1504/ijewm.2016.076427
复制
发表时间：
2016-05
影响因子：
0.6
通讯作者：
N. Khatri;S. Tyagi;Dr. Deepak Rawtani
中科院分区：
文献类型：
--
作者：
N. Khatri;S. Tyagi;Dr. Deepak Rawtani
使用埃洛石纳米管 (HNT) 去除碱性染料金胺黄和金胺 O 进行了一系列研究，HNT 是一种低成本粘土矿物超结构，可从水溶液中去除阳离子染料。研究过程中吸附剂剂量、初始浓度等实验参数的影响；通过使用分批吸附技术，调整初始 pH、接触时间和温度，初始染料浓度从 10 ppm 增加到 15 ppm，然后从 15 ppm 减少到 25 ppm，金胺的去除百分比增加。当吸附物分子的数量保持恒定时，由于更大的表面积和更多吸附位点的可用性，观察到吸附随着吸附剂剂量的增加而增加。还发现在碱性介质中发生了最大程度的染料去除。类似地，HNT 上吸附量的增加是由于吸附物分子扩散速率的增加，使用一级动力学的 Freundlich 和 Langmuir 吸附等温线进行建模。其中观察到的吸附结果表明，HNT 有潜力用作低成本且相对有效的吸附剂来去除金胺染料。
A series of studies were conducted for the removal of the basic dyes auramine yellow and auramine O using halloysite nanotubes (HNTs), the low cost clay minerals ultra-structure to removes cationic dye from aqueous solution. During the study of the effect on experimental parameters such as adsorbent dose, initial concentration; initial pH, contact time and temperature by using batch adsorption technique, removal percentage of auramine increases for initial dye concentrations from 10 ppm to 15 ppm and then decreases from 15 ppm to 25 ppm. An increase in the adsorption with the adsorbent dosage was observed due to greater surface area and the availability of more adsorption sites when the number of adsorbate molecules remains constant. It was also found that maximum dye removal had occurred in basic medium. Similarly, rise in adsorption onto HNT is due to increase in rate of diffusion of adsorbate molecule, modelled using Freundlich and Langmuir adsorption isotherms with first order kinetic. In which adsorption was observed results indicate that HNTs had the potential to be employed as low-cost and relatively effective adsorbent for the removal of auramine dye.