Preparation of biochar from pyrolysis of soybean straw at different pyrolysis temperature for cadmium removal from wastewater and pyrolysis gas investigation

IF 5.3 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Arabian Journal of Chemistry Pub Date : 2024-08-02 DOI:10.1016/j.arabjc.2024.105946

Chao Lv , Peng Liu , Song Cheng

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Abstract

The Cd²⁺ adsorption performance of biochar derived from soybean straw pyrolysis at 400–600 °C is investigated. Langmuir model can accurately describe the Cd²⁺ adsorption data with adsorption amount of 47.30 mg/g with pH=5. Cd²⁺ adsorption kinetic process could be analyzed using Pseudo-second-order. Biochar has large Cd²⁺ wastewater treatment volume, based on column adsorption experiment. The π-electrons play an important role in Cd²⁺ adsorption, based on adsorption mechanism analysis. Biochar has good stability after three cycles. Biochar also has good application potential used in lithium ion battery anode with specific capacity of 132 mA g⁻¹. Besides, pyrolysis gas is recycled in the preparation process of biochar with heating value of the 12.10 MJ/Nm³. These results indicate that soybean straw waste is converted into sustainable adsorbent for Cd²⁺ wastewater treatment.

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不同热解温度下热解大豆秸秆制备生物炭用于废水除镉及热解气体研究

研究了大豆秸秆在 400-600 °C 高温分解产生的生物炭对镉的吸附性能。Langmuir 模型能准确描述镉的吸附数据，pH=5 时的吸附量为 47.30 mg/g。镉吸附动力学过程可采用伪二阶进行分析。根据柱吸附实验，生物炭具有较大的镉废水处理量。根据吸附机理分析，π 电子在镉吸附过程中发挥了重要作用。生物炭在三次循环后具有良好的稳定性。此外，生物炭在制备过程中回收了热解气体，其热值为 12.10 MJ/Nm。这些结果表明，大豆秸秆废物可转化为可持续的吸附剂，用于镉废水处理。

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来源期刊

Arabian Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

10.80

自引率

3.30%

发文量

763

审稿时长

63 days

期刊介绍： The Arabian Journal of Chemistry is an English language, peer-reviewed scholarly publication in the area of chemistry. The Arabian Journal of Chemistry publishes original papers, reviews and short reports on, but not limited to: inorganic, physical, organic, analytical and biochemistry. The Arabian Journal of Chemistry is issued by the Arab Union of Chemists and is published by King Saud University together with the Saudi Chemical Society in collaboration with Elsevier and is edited by an international group of eminent researchers.