Adsorption and electro-catalytic performance of biochar from rice husk

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-09-10 DOI:10.1002/jctb.70058

Xingxing Zhu, Qianmin Cong, Zhangjie Ban, Mengyan Pei, Yuetong Chang, Zhengyu Cai, Xuexiang Ge, Lizhai Pei

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引用次数: 0

Abstract

BACKGROUND

Organic pollutants, such as rhodamine B (RhB), methylene blue (MB), and 1,2-dihydroxybenzene (catechol) used in dyes, textile industries, cosmetics, plasticizers, pesticides, and pharmaceuticals are difficult to be degraded and have important influence on the ecosystems and human beings. The removal of organic contaminants and sensitive detection of catechol are still important challenges. Rice husk biochar (RHBC) was successfully prepared via a simple sintering technology under Ar atmosphere.

RESULTS

The morphological and structural characterizations show that the proposed RHBC consists of irregular particles with the size of less than 10 μm and amorphous structure. The adsorption performance for the removal of organic pollutants including RhB and MB using the RHBC was investigated. The optimal RHBC dose is 1.25 mg·mL⁻¹ dyes (RhB or MB) solution. 10 mg·L⁻¹ RhB or MB can be totally removed with the adsorption time of 140 min and 70 min, respectively. The RHBC can be used as electrode materials and has an essential effect in the electro-catalytic sensing performance for catechol detection by square wave voltammetry (SWV) method.

The RHBC-modified electrode indicates a determination range of 0.001–1000 μM, low limit of detection of 0.57 nM, oxidation potential of + 0.35 V, good selectivity, reproducibility, stability, and applicability in real water environment for catechol detection.

CONCLUSION

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稻壳中生物炭的吸附及电催化性能

罗丹明B （RhB）、亚甲基蓝（MB）、1,2-二羟基苯（儿茶酚）等有机污染物是染料、纺织工业、化妆品、增塑剂、农药和药品中使用的难以降解的污染物，对生态系统和人类有重要影响。有机污染物的去除和儿茶酚的灵敏检测仍然是重要的挑战。在氩气气氛下，采用简单烧结技术成功制备了稻壳生物炭。结果形态和结构表征表明，所制备的RHBC由粒径小于10 μm的不规则颗粒和非晶结构组成。研究了RHBC对有机污染物RhB和MB的吸附性能。RHBC的最佳剂量为1.25 mg·mL−1染料（RhB或MB）溶液。吸附时间分别为140 min和70 min，可完全去除10 mg·L−1的RhB和MB。RHBC可作为电极材料，对方波伏安法（SWV）检测邻苯二酚的电催化传感性能有重要影响。rhbc修饰电极的检测范围为0.001 ~ 1000 μM，检测下限为0.57 nM，氧化电位为+ 0.35 V，具有良好的选择性、重复性、稳定性，适用于实际水环境中邻苯二酚的检测。结论RHBC对废水中有机污染物具有良好的吸附能力和电催化检测邻苯二酚的性能。©2025化学工业学会（SCI）。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.