生物炭改性策略及其在铬(Ⅵ)污染修复中的研究进展
Modification Strategies of Biochar and Their Research Progress in Cr(Ⅵ)Pollution Remediation
栗泽红 1宋慧佳 1张新月 1郝旖 2吴爱茹 3徐四龙 1高瑞霞1
作者信息
- 1. 西安交通大学化学学院,西安 710049
- 2. 西安交通大学医学部药学院,西安 710061
- 3. 西安市农机监理与推广总站,西安 710063
- 折叠
摘要
六价铬(Cr(Ⅵ))是自然环境中毒性很强的重金属污染物之一,对生态系统构成严重威胁.生物炭是生物质在缺氧条件下热解产生的一种富碳固体物质,因具有比表面积大、孔结构发达和官能团丰富等优点,可作为修复Cr(Ⅵ)污染的高效吸附材料.目前,研究人员主要通过物理改性、化学改性、负载金属改性及生物改性等多种策略进一步增强生物炭对Cr(Ⅵ)的吸附能力.本文综述了近年来生物炭改性的研究进展,系统梳理了不同生物炭改性策略,比较了不同改性策略制备的生物炭对Cr(Ⅵ)污染的修复效率,分析了其作用机制,并对生物炭的改性修饰及其在实际应用中的未来发展方向进行了讨论.
Abstract
Hexavalent chromium Cr(Ⅵ)is one of the most toxic heavy metals accumulated in the natural environment systems,which poses a serious threat to living organisms worldwide.Biochar is a type of carbon-rich solid substance produced via hypoxic pyrolysis of biomass and regarded as an efficient adsorbent for Cr(Ⅵ)pollution remediation due to its large specific surface area,well-developed porous structure and abundant functional groups.To further enhance the adsorption performance of biochar and make it easier to separate and recycle,researchers have carried out extensive researches on the modification of biochar,and physical,chemical,and biological modification strategies have been explored to strengthen the adsorption ability of biochar towards Cr(Ⅵ).Based on the researches of biochar modification in recent years,this review systematically sorted out different modification strategies of biochar,compared the remediation efficiencies of Cr(Ⅵ)pollution by different kinds of modified-biochar,discussed the potential mechanism of modified-biochar towards Cr(Ⅵ)removal,and put forward prospects for the future research direction of biochar.
关键词
生物炭/改性策略/铬(Ⅵ)/吸附机制/评述Key words
Biochar/Modification strategies/Hexavalent chromium/Adsorption mechanism/Review引用本文复制引用
基金项目
陕西省自然科学基金(2020JM-066)
陕西省自然科学基金(2020JQ-019)
出版年
2024
国家科技期刊平台
NSTL
万方数据