数字农科院2.0

Remediation of lead toxicity with waste-bio materials from aqueous solutions in fixed-bed column using response surface methodology

文献类型： 外文期刊

作者： Aanisa Manzoor Shah;Inayat Mustafa Khan;Zhenjie Du;Rehana Rasool;Raihana Habib Kant;Shakeel Mir;Tahir A. Sheikh;Fehim Jeelani Wani;M. Ayoub Bhat;Javid A. Bhat;M. H. Chesti;Mumtaz A. Ganie;Yasir Hanif Mir;Tsering Dolker;Sulaiman Ali Alharbi;Tahani Awad Alahmadi;Shafeeq Ur Rahman

作者机构：

关键词： Box-behnken design;Fixed-bed column;Human hair;Lead adsorption;RSM;Waste biomaterials

期刊名称： Heliyon

ISSN： 2405-8440

年卷期： 2024 年 10 卷 15 期

页码：

收录情况： SCIE（2024版）

摘要： Heavy metal ions pose significant risks to human health, pelagic, and several other life forms due to perniciousness, tendency to accumulate, and resistance to biodegradation. Waste bio-materials extend a budding alternative as low-cost adsorbent to address the removal of noxious pollutants from wastewater on account of being cost-effective and exhibiting exceptional adsorption capacities. The current exploration was accomplished to gauge the performance of raw and modified human hair concerning lead scavenging in a down-flow fixed bed column. The appraisal of column performance under varying operational parameters encompassing bed height (15–45 cm), influent metal ion concentration (60–140 mg L−1), and a solution flow rate (20–40 mL min−1) was performed by breakthrough curve analysis. The consequences acquired were evaluated using the Yoon Nelson, Thomas, Adam-Bohart, and Bed Depth Service Time (BDST) model. Among these employed models, Bed Depth Service Time (BDST) and Thomas models exhibited the highest R-squared value compared to the Yoon Nelson and Adam-Bohart's model for most cases. In addition, the optimization of lead adsorption was followed using the Box-Behnken design of response surface methodology (RSM). The optimal conditions (desirability-1.00) for achieving a goal of maximum percent removal of lead ions were marked to be a bed height of 42.79 cm, solution flow rate of 20.92 mL min−1 and an initial metal concentration of 139.51 mg L−1. Under these optimized conditions, the percent amputation of lead in a fixed bed was observed to be 82.31 %, while the results of the experiment performed approximately under these optimized conditions revealed a percent removal of 85.05 %, reflecting a reasonable conformity with values acquired through Box-Behnken design.

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