Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (10): 5445-5458.DOI: 10.16085/j.issn.1000-6613.2022-2168

• Resources and environmental engineering • Previous Articles     Next Articles

Research progress of microplastic removal from water environment by biochar

SU Jingzhen1(), ZHAN Jian2,3()   

  1. 1.School of Infrastructure Engineering, Nanchang University, Nanchang 330031, Jiangxi, China
    2.School of Resources and Environment, Nanchang University, Nanchang 330031, Jiangxi, China
    3.Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2022-11-22 Revised:2023-02-08 Online:2023-11-11 Published:2023-10-15
  • Contact: ZHAN Jian

生物炭对水环境中微塑料的去除研究进展

苏景振1(), 詹健2,3()   

  1. 1.南昌大学工程建设学院,江西 南昌 330031
    2.南昌大学资源与环境学院,江西 南昌 330031
    3.南昌大学鄱阳湖环境与资源利用教育部重点实验室,江西 南昌 330031
  • 通讯作者: 詹健
  • 作者简介:苏景振(1998-),男,硕士研究生,研究方向为水处理技术。E-mail:1141748597@qq.com
  • 基金资助:
    江西省研究生创新专项(YC2020-S125);南昌大学研究生创新专项(CX2019115)

Abstract:

A brand-new pollutant in the aquatic environment is microplastics. Microplastic removal by conventional water treatment techniques was more constrained. The advantages of economic and environmental protection and high removal efficiency are demonstrated by the effective adsorption of microplastics with a low spontaneous desorption rate on the diversified microporous structure, high hydrophobicity and high carbon content of biochar. However, there are still some issues, such as the inability to eliminate and breakdown microplastics and the low application of biochar in multiple environments. In this review, the current state of microplastic water pollution and conventional water treatment techniques for removing them were overviewed. Firstly, the research progress of microplastic removal by adsorption on biochar was introduced, focusing on the characteristics, action mechanism and affecting factors of biochar. Secondly, the effects of physicochemical characteristics of biochar (raw materials, preparation conditions and modification methods) and microplastics (species, grain size and structural traits), and environmental factors (pH, coexisting ion and dissolved organic matter) on adsorption behavior were summarized. The current state of biochar and microplastic coexistence in soils was described. Finally, in order to provide theoretical support for the biochar removal of common microplastics from various water bodies, some recommendations were proposed for future research, including uniform microplastic classification for targeted development of biochar materials, improved experimental conditions to more accurately simulate the real world, exploration of the mechanisms of synergistic effects of biochar and microplastics, and a focus on biochar recycling.

Key words: biochar, microplastics, adsorption, aquatic environment, influencing factors

摘要:

微塑料已成为水体环境中的一种新污染物。常规水处理方法去除微塑料局限较多,生物炭的多样微孔结构、高疏水性和高碳含量能够有效吸附微塑料且自发解吸率较低,表现出经济环保、去除效率高的优势,但仍存在无法降解除去微塑料以及生物炭多环境应用性低的问题。本文概述了微塑料的水污染现状和常规水处理去除方法,重点从生物炭特性、作用机理和影响因素等方面综述了生物炭吸附去除微塑料的研究进展,分析了生物炭(原料成分、制备条件、改性方式等)和微塑料(种类、粒径、结构特征等)自身的理化性质以及环境因素(pH、共存离子、有机干扰物质等)对吸附行为的影响,并介绍了土壤中生物炭与微塑料的共存现状。最后对未来工作提出进一步统一归类微塑料以针对性开发生物炭材料、改进实验条件以真实性模拟实际环境、探索生物炭与微塑料的协同效应机制及重视生物炭循环再生等建议,以期为生物炭针对性去除不同水体中常见微塑料提供理论支持。

关键词: 生物炭, 微塑料, 吸附作用, 水体环境, 影响因素

CLC Number: 

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