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Cashew nut testa tannin resin – preparation, characterization and adsorption studies
Journal of Taibah University for Science ( IF 3.3 ) Pub Date : 2021-06-03 , DOI: 10.1080/16583655.2021.1930717
N. J. Nnaji 1 , N. I. Okafor 2 , A. M. Ekwonu 3 , O. U. Osuji 1 , O. O. Okwukogu 4 , O. Okoye 4 , A. I. Anozie 4 , S. C. Anene 5 , R. C. Ehiri 1 , T. U. Onuegbu 4
Affiliation  

Adsorption of metal ions and dyes from water by cashew nut testa tannin resin (CATAR) was studied and the effects of temperature, initial pH, initial concentration and time were investigated. Scanning electron microscopy (SEM) and infrared spectroscopy (FTIR) reveal effective adsorption processes. Kinetic studies show that CATAR adsorption is complex and thermodynamic parameters calculated reveal spontaneous and endothermic adsorption of studied pollutants onto CATAR. The use of CATAR as an alternative adsorbent is proposed considering that of simulated wastewaters gave excellent removal performances of 94.0% (Cd ions), 99.4% (Cu ions) and 97.1% (Pb ions) at pH of 6 and 303 K using amount of CATAR. Removal performances obtained for simulated dye wastewaters using CATAR at similar conditions for removal of metal ions gave 71.1%, 79.2% and 86.6%, respectively for crystal violet, methylene blue and malachite green.



中文翻译:

腰果种皮单宁树脂——制备、表征和吸附研究

研究了腰果种皮单宁树脂 (CATAR) 从水中吸附金属离子和染料,并研究了温度、初始 pH 值、初始浓度和时间的影响。扫描电子显微镜 (SEM) 和红外光谱 (FTIR) 揭示了有效的吸附过程。动力学研究表明 CATAR 吸附是复杂的,计算的热力学参数揭示了研究的污染物在 CATAR 上的自发和吸热吸附。考虑到模拟废水在 pH 值为 6 和 303 K 时具有 94.0%(Cd 离子)、99.4%(Cu 离子)和 97.1%(Pb 离子)的优异去除性能,建议使用 CATAR 作为替代吸附剂。卡特尔。使用 CATAR 在类似条件下去除金属离子的模拟染料废水的去除性能分别为 71.1%、79.2% 和 86.6%,

更新日期:2021-06-03
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