Adsorption of basic fuchsin using waste materials-bottom ash and deoiled soya-as adsorbents
Adsorption of basic fuchsin using waste materials-bottom ash and deoiled soya-as adsorbents
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DOI：
10.1016/j.jcis.2007.09.091
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发表时间：
2008-03-01
影响因子：
9.9
通讯作者：
Mittal, Jyoti
中科院分区：
文献类型：
--
作者：
Gupta, V. K.;Mittal, Alok;Mittal, Jyoti
碱性品红是一种三氨基三苯基甲烷染料，通过利用两种废料——“底灰”（发电厂废料）和“脱油大豆”（农业废料）进行吸附去除。通过红外光谱和差热分析（DTA）对吸附剂进行了表征。通过测量pH、吸附物浓度、筛孔尺寸、吸附剂用量、接触时间、温度等因素的影响，进行了批量吸附实验。结果在Langmuir和Freundlich吸附等温线模型的基础上进行了验证，并将获得的数据用于计算热力学参数。通过动力学测量计算该过程的具体速率常数，并在每种情况下观察到伪二级吸附动力学。为了确定正在进行的过程是粒子扩散还是薄膜扩散，采用了博伊德和赖兴伯格给出的处理方法。为了评估吸附剂的实用性，通过相应吸附剂的固定床柱洗脱含水吸附物样品。还尝试通过使合适的溶剂通过柱来回收吸附的染料。 (c) 2007 Elsevier Inc. 保留所有权利。
Basic fuchsin, a triaminotriphenyltnethane dye, was removed by adsorption utilizing two waste materials-"bottom ash," a power plant waste material, and "deoiled soya," an agriculture waste product. The adsorbents were characterized through IR spectroscopy and differential thermal analysis (DTA). Batch adsorption experiments were carried out by measuring effects of pH, adsorbate concentration, sieve size, amount of adsorbent, contact time, temperature, etc. The results have been verified on the basis of Langmuir and Freundlich adsorption isotherm models and data obtained have been applied to calculate thermodynamic parameters. Specific rate constants for the processes were calculated by kinetic measurements and a pseudo-second-order adsorption kinetics was observed in each case. To identify whether the ongoing process is particle diffusion or film diffusion, the treatment given by Boyd and Reichenberg was employed. To assess the practical utility of the adsorbent, the aqueous adsorbate samples were eluted through fixed-bed columns of respective adsorbents. Attempts were also made to recover the adsorbed dyes by passing suitable solvent through the columns. (c) 2007 Elsevier Inc. All rights reserved.