Adsorption of anionic dye (Reactive black 5) using macadamia seed Husks: Kinetics and equilibrium studies

被引：95
作者：
Felista, Mutunga M. [1 ]
Wanyonyi, Wycliffe C. [1 ]
Ongera, Gilbert [1 ]
机构：
[1] Univ Kabianga, Sch Sci & Technol, Dept Phys Sci, Box 2030-20200, Kericho, Kenya
来源：
SCIENTIFIC AFRICAN | 2020年 / 7卷
关键词：
Macadamia seed Husks; Reactive black 5; Adsorption; Kinetics; Equilibrium; AQUEOUS-SOLUTIONS; METHYLENE-BLUE; CONGO-RED; SORPTION; REMOVAL;
D O I：
10.1016/j.sciaf.2020.e00283
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Adsorption of Reactive black 5 dye currently used in textile industries was investigated using Macadamia Seed Husks (MSH) from a local Macadamia nut processing industry. Adsorption increased with increase in contact time, adsorbent dose and dye concentration. Conversely, the percentage dye adsorbed decreased with increase of solution pH and size of MSH particles. Sorption increased with an increase in temperature signaling an endothermic process. Batch adsorption data best fitted to Freundlich adsorption isotherm model with K-f value of 4.20679 and n = 2.3375. The adsorption kinetics followed a pseudo-second-order kinetic model with high correlation coefficients (R-2 > 0.98). These results demonstrated that MSH is an environmentally friendly, locally available, effective and economical adsorbent for the removal of RB5 dye from industrial wastewaters. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of African Institute of Mathematical Sciences / Next Einstein Initiative.
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页数：8
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