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酸处理石榴皮；一种从废水中去除六价铬的高效生物吸附剂。

Acid-treated pomegranate peel; An efficient biosorbent for the excision of hexavalent chromium from wastewater.

作者信息

Rai Rajan, Aryal Ram Lochan, Paudyal Hari, Gautam Surendra Kumar, Ghimire Kedar Nath, Pokhrel Megh Raj, Poudel Bhoj Raj

机构信息

Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal.

Department of Chemistry, Amrit Campus, Tribhuvan University, Kathmandu, Nepal.

出版信息

Heliyon. 2023 Apr 24;9(5):e15698. doi: 10.1016/j.heliyon.2023.e15698. eCollection 2023 May.

DOI:10.1016/j.heliyon.2023.e15698
PMID:37159700
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10163652/
Abstract

We studied the sequestration of hexavalent chromium Cr(VI) from an aqueous solution using chemically modified pomegranate peel (CPP) as an efficient bio-adsorbent. The synthesized material was characterized by X-ray diffraction spectroscopy (XRD), Fourier-transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). The impacts of parameters like solution pH, Cr(VI) concentration, contact time, and adsorbent dosage were investigated. Experimental results of the isotherm studies and adsorption kinetics were found agreeing to the Langmuir isotherm model and pseudo-second-order kinetics, respectively. The CPP showed appreciable Cr(VI) remediation capacity with a maximal loading capacity of 82.99 mg/g at pH 2.0, which was obtained in 180 min at room temperature. Thermodynamic studies revealed the biosorption process as spontaneous, feasible, and thermodynamically favorable. The spent adsorbent was eventually regenerated and reused, and the safe disposal of Cr(VI) was ensured. The study revealed that the CPP can be effectively employed as an affordable sorbent for the excision of Cr(VI) from water.

摘要

我们研究了使用化学改性石榴皮（CPP）作为高效生物吸附剂从水溶液中螯合六价铬Cr(VI)的情况。通过X射线衍射光谱（XRD）、傅里叶变换红外光谱（FTIR）、能量色散光谱（EDS）和扫描电子显微镜（SEM）对合成材料进行了表征。研究了溶液pH值、Cr(VI)浓度、接触时间和吸附剂用量等参数的影响。等温线研究和吸附动力学的实验结果分别符合朗缪尔等温线模型和准二级动力学。CPP在pH 2.0时表现出可观的Cr(VI)修复能力，最大负载量为82.99 mg/g，这是在室温下180分钟内获得的。热力学研究表明生物吸附过程是自发的、可行的且在热力学上是有利的。最终对用过的吸附剂进行了再生和再利用，并确保了Cr(VI)的安全处置。研究表明，CPP可以有效地用作从水中去除Cr(VI)的经济实惠的吸附剂。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0998/10163652/6f5c2199725e/gr12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0998/10163652/d4eeba1e6370/gr14.jpg
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