利用经化学和细菌处理的农业废弃物优化减少水道中的铬(Cr+6)。

IF 3.7 3区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY
IUBMB Life Pub Date : 2024-07-25 DOI:10.1002/iub.2892
Jayeshkumar Ruparelia, Rishit A Soni, Hiren K Patel
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引用次数: 0

摘要

重金属是环境中的一个主要污染源,由于其不可生物降解性和在生物体内蓄积的能力,对人体健康造成严重威胁。最近,研究人员一直在寻找既经济又安全的方法,利用农业废弃物替代品清除受污染水道中的重金属。本研究的重点是采用低成本处理方法减少污水中的铬 Cr+6 金属,研究发现,经过化学和细菌处理的农业废弃物具有更强的重金属离子吸附能力。为了最大限度地减少污水中的铬金属含量,我们尝试使用普拉克特-伯曼设计(PBD)和响应面方法中央复合设计(CCD-RSM)对工艺参数进行了连续优化。通过 12 次 PBD 试验,共筛选出 8 个参数。在这八个参数中,发现时间、盐酸、NaOH 和细菌处理对最大程度减少污水中的 Cr+6 有显著影响。为了探究所选参数的交互影响,我们使用 CCD-RSM 对其进行了评估。通过 30 次 CCD-RSM 实验,在盐酸 4.52 N、NaOH 3.53 N、细菌悬浮液 7.41%、交互作用时间为 14.32 分钟的稻壳最佳处理条件下,Cr+6 的最大减少量为 74%。使用扫描电子显微镜和傅立叶变换红外光谱仪确认了所选变量对农业废弃物还原 Cr+6 的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimization of the chromium (Cr+6) reduction from waterways using chemically and bacterially treated agro-waste.

Heavy metals, a major source of pollution in the environment, pose a substantial threat due to their non-biodegradability and ability to accumulate in living organisms, causing health problems. Recently, researchers have been searching for cost-effective and safe ways to remove heavy metals from polluted waterways using agricultural waste substitutes. The present study focused on the low-cost treatments for the reduction of chromium Cr+6 metal from the effluent, wherein it has been found that chemically and bacterially treated agro-waste had increased heavy metal ion adsorption capabilities. A sequential optimization of the process parameters was attempted using Plackett-Burman design (PBD) and central composite design of response surface methodology (CCD-RSM) for the maximum reduction of the chromium metal from the effluent. A total of eight parameters were screened out using a 12-run PBD experiment. Out of the eight parameters, time, HCl, NaOH, and bacterial treatments were found to be significantly affecting the maximum reduction of Cr+6 from the effluent. To investigate the interactions' effects of the chosen parameters, they were evaluated using CCD-RSM. Maximum 74% Cr+6 reduction was achieved under the optimum treatment to rice husk of HCl 4.52 N, NaOH 3.53 N, bacterial suspension 7.41%, and with an interaction time 14.32 min using 30 run CCD-RSM experiment. A scanning electron microscope was used to confirm the effects of selected variables on the agro-waste for the Cr+6 reductions, as well as a Fourier transform infrared spectrometer.

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来源期刊
IUBMB Life
IUBMB Life 生物-生化与分子生物学
CiteScore
10.60
自引率
0.00%
发文量
109
审稿时长
4-8 weeks
期刊介绍: IUBMB Life is the flagship journal of the International Union of Biochemistry and Molecular Biology and is devoted to the rapid publication of the most novel and significant original research articles, reviews, and hypotheses in the broadly defined fields of biochemistry, molecular biology, cell biology, and molecular medicine.
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