利用废咖啡壳作为低成本生物吸附剂吸附Pb2。

IF 1.1 Q3 BIOLOGY Tropical life sciences research Pub Date : 2022-09-01 DOI:10.21315/tlsr2022.33.3.12

Rusnam, Aninda Tifani Puari, Nika Rahma Yanti, Efrizal

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引用次数: 1

摘要

本研究利用废弃咖啡壳的生物吸附剂(ECHBS)去除水溶液中的Pb2+离子。用KOH、H3PO4、ZnCl2进行化学活化和不进行化学活化四种不同的活化方法。此外，还考察了加热温度、加热时间、加热梯度等工艺参数的影响。实验结果表明，未经化学活化的ECHBS(生物炭)去除Pb2+离子的效率最高。结果表明，制备生物炭的最佳温度为500℃，加热时间为60 min，加热速率为15℃/min。在最佳条件下，活性炭的去除率达到99%，吸附量达到3.3 mg/g。实验数据表明，吸附等温线符合Langmuir平衡等温线模型。此外，生物炭的吸附符合准二级模型。研究结果表明，废咖啡壳是一种较好的低成本生物吸附剂，可用于去除Pb2+离子。

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Utilisation of Exhausted Coffee Husk as Low-Cost Bio-Sorbent for Adsorption of Pb².

This study utilised a bio-sorbent from exhausted coffee husk (ECHBS) for the removal of ion Pb²⁺ from an aqueous solution. Four different activation methods were conducted by chemical activation with KOH, H₃PO₄, ZnCl₂, and without chemical activation. In addition, the influence of process parameters such as heating temperature, heating time and heating gradient were investigated. Based on the experimental results, ECHBS without chemical activation (biochar) had the highest Pb²⁺ ion removal efficiency. The results showed that the heating temperature of 500°C, the heating time of 60 min and the heating rate of 15°C/min were optimum for preparation of the biochar. Under the optimum conditions, the removal efficiency and adsorption capacity reached 99% and 3.3 mg/g, respectively. The experimental data indicated that the adsorption isotherms are well fitted with the Langmuir Equilibrium isotherm model. Furthermore, the adsorption of the biochar follows the pseudo-second-order model. The result obtained from the present study confirmed that exhausted coffee husk is a suitable low-cost bio-sorbent for removing ion Pb²⁺.

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来源期刊

Tropical life sciences research BIOLOGY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

20 weeks

期刊介绍： Tropical Life Sciences Research (TLSR) formerly known as Journal of Bioscience seeks to publish relevant ideas and knowledge addressing vital life sciences issues in the tropical region. The Journal’s scope is interdisciplinary in nature and covers any aspects related to issues on life sciences especially from the field of biochemistry, microbiology, biotechnology and animal, plant, environmental, biomedical and pharmaceutical sciences. TLSR practices double blind peer review system to ensure and maintain the good quality of articles published in this journal. Two issues are published annually in printed and electronic form. TLSR also accepts review articles, experimental papers and short communications. The Chief Editor would like to invite researchers to use this journal as a mean to rapidly promote their research findings.