Herbert Arpan, Kumar Upendra, Janardhan Prashanth
Department of Civil Engineering, National Institute of Technology Silchar, Silchar, Assam, India.
Water Environ Res. 2021 Jul;93(7):1032-1043. doi: 10.1002/wer.1491. Epub 2020 Dec 18.
In the present article, an attempt is made for simple, low-cost, and efficient removal of Auramine dye using peanut (Arachis hypogaea) shells as adsorbents. Two different forms of adsorbents distilled water washed peanut shells (DPS) and NaOH treated peanut shells (NPS) were used as adsorbents. Both the adsorbents were studied using BET, pH , FTIR, SEM, TGA, and XRD characterization techniques. Adsorption parameters such as effect of contact time, pH, initial dye concentration, adsorbent dose, and temperature were also assessed. Isotherm analysis at optimum conditions showed Langmuir fitted better with a q value of 96.15 mg/g for DPS and 294.12 mg/g for NPS; while in kinetic analysis, pseudo-second order was superior. Thermodynamics study stated that adsorption process was endothermic in nature. Overall outcomes establish that the two forms of peanut shells, DPS, and NPS were excellent in removal of Auramine dye and are low cost also as preparation cost of DPS and NPS is 68.73 INR and 106.19 INR per kg, respectively. PRACTITIONER POINTS: Removal of Auramine dye from aqueous media using different forms of peanut (Arachis hypogaea) shells as adsorbents is discussed. q (Langmuir) using DPS and NPS were found to be 96.15 and 294.12 mg/g, respectively. Preparation cost of DPS was 68.73 INR per 1 kg, whereas for NPS it was 106.19 INR per 1 kg.
在本文中，尝试使用花生（落花生）壳作为吸附剂，以简单、低成本且高效地去除金胺染料。使用了两种不同形式的吸附剂，即蒸馏水洗涤的花生壳（DPS）和氢氧化钠处理的花生壳（NPS）作为吸附剂。使用BET、pH、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、热重分析（TGA）和X射线衍射（XRD）表征技术对这两种吸附剂进行了研究。还评估了吸附参数，如接触时间、pH、初始染料浓度、吸附剂剂量和温度的影响。在最佳条件下的等温线分析表明，朗缪尔等温线拟合效果更好，DPS的q值为96.15 mg/g，NPS的q值为294.12 mg/g；而在动力学分析中，伪二级动力学模型表现更优。热力学研究表明，吸附过程本质上是吸热的。总体结果表明，DPS和NPS这两种形式的花生壳在去除金胺染料方面表现出色，并且成本较低，因为DPS和NPS的制备成本分别为每千克68.73印度卢比和106.19印度卢比。从业者要点：讨论了使用不同形式的花生（落花生）壳作为吸附剂从水介质中去除金胺染料的方法。发现使用DPS和NPS的q（朗缪尔）值分别为96.15和294.12 mg/g。DPS的制备成本为每1千克68.73印度卢比，而NPS为每1千克106.19印度卢比。
