4.7 Article

Characterization and application of biochar-immobilized crude horseradish peroxidase for removal of phenol from water

期刊

出版社

ELSEVIER
DOI: 10.1016/j.colsurfb.2021.112038

关键词

Biochar; Horseradish peroxidase; Phenol removal; Water treatment; Toxicity

资金

  1. Ministry of Education, Science and Technological Development of Republic of Serbia [OI 172059, 451-03-68/2020-14/200134, 451-03-9/2021-14/200134, 451-03-9/2021-14/200133, 451-03-9/2021-14/200125]

向作者/读者索取更多资源

This study investigates the use of wood-derived biochar as a support for the covalent immobilization of horseradish peroxidase for phenol removal in wastewater treatment. The immobilized enzyme showed high efficiency in phenol removal under specific reaction conditions, and significantly reduced the toxicity of the treated water.
Biochar (BC) has attracted much attention as an environmentally friendly material for application in wastewater treatment. In this study, a suitability of wood-derived BC as a support for covalent immobilization of horseradish peroxidase (HRP) across glutaraldehide as crosslinker, known for the capability to remove phenol from water, was investigated. The efficiency of the immobilized HRP in removal of phenol (2 mM) from water at different reaction conditions (varying dosages of polyethylene glycol (PEG300) 0 750 mg/L; H2O2 1.5-3.5 mM, as well as reaction time 5 120 min) and the general toxicity of bio-treated water (Allium cepa test) were measured. All analyzes were performed for free enzyme as well. The immobilized enzyme showed the highest activity at temperature 30.C and pH 7.0. The greatest efficiency of immobilized enzyme in phenol removing (90 %) was obtained by applying 2.5 mM H2O2 and 1.5 mg/L of PEG300 at pH 7.0 after 2 h of reaction period. After 4 washings, immobilized HRP retained more than 79 % activity with phenol removal of 64 %. Utilizing immobilized enzyme significantly reduces the toxicity of the tested water (80 %), which further suggested that it might be considered as an environmentally acceptable process for wastewater treatment. Possible degradation products remained in treated water were analyzed in water samples by liquid and gas chromatography with mass spectrometry, including also analysis of volatiles by solid phase microextraction technique; different phenol-base compounds were detected.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据