Single-atom nanozymes possess high catalytic activity and selectivity, and are emerging as advanced heterogeneous catalysts for environmental applications. Herein, we present the innovative synthesis and characterization of a single-atom manganese-doped carbon nitride (SA-Mn-CN) nanozyme, integrated into a polyvinylidene fluoride (PVDF) membrane for advanced water treatment applications. The SA-Mn-CN nanozyme demonstrates high peroxidase-like activity, efficiently catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) and generating reactive oxygen species (ROS) for effective antibacterial action. Notably, the SA-Mn-CN/PVDF membrane showcases enhanced water permeability, superior antifouling properties, and ultra-fast degradation kinetics of organic pollutants. Mechanistic studies reveal that the nanozyme selectively generates Mn(IV)-oxo species via peroxymonosulfate (PMS) activation, crucial for the efficient oxidation processes. Our integrated membrane system effectively removes (within 1 min, > 92 % removal) a variety of organic micropollutants in continuous-flow operations, demonstrating excellent stability and minimal manganese leaching. Compared to conventional advanced oxidation process (AOPs)/membrane system, the SA-Mn-CN/PVDF/PMS system holds the advantages of high catalytic activity and selectivity for generation of reactive species, wide working pH range (pH3-11) and excellent stability and reusability under the backwashing conditions. The developed device-scale AOPs/membrane system was proven to be effective in bacterial inactivation and pollutants degradation, verifying the vast application potential of the SA-Mn-CN/PVDF membrane for practical water decontamination. This work pioneers the development of enzyme-mimicking nanozyme membranes, offering a sustainable and high-performance solution for wastewater treatment, and sets a new benchmark for the design of nanozyme-based catalytic membranes in environmental applications.

Jiahao Sun

Minjia Yan

Guangdong Tao

Runbin Su

Xuanming Xiao

Qiangshun Wu

Feng Chen

Xi-Lin Wu

Hongjun Lin

Water Research

WATER RESEARCH 拥有开放获取的镜像期刊 WATER RESEARCH X，具有相同的目标和范围、编辑团队、提交系统和严格的同行评审。 WATER RESEARCH 在全球范围内发表关于水质科学和技术及其管理各个方面的参考原创研究论文。该杂志范围的广泛概述包括：-水和废水、市政、农业和工业的处理过程，包括残留物管理。-基于化学、物理和生物方法的水质监测和评估。-内陆研究，潮汐或沿海水域和城市水域，包括地表水和地下水，以及点和非点污染源。-湖泊、蓄水池和河流的湖沼学。-固体和危险废物管理，包括来源特征以及污染的影响和控制渗滤液和气体排放。-环境恢复，包括土壤和地下水修复。-沉积物和水之间的界面以及水/大气相互作用的分析。-数学建模和系统分析技术的应用。-公共卫生和风险评估。-社会经济研究。受众：生物学家、化学工程师、化学家、土木工程师、环境工程师、湖泊学家和微生物生物学家。

Water Research is an open-access journal that has a mirror journal, Water Research X, which shares the same aims and scope, editorial team, submission system, and rigorous peer review process. The journal publishes original research papers on all aspects of water quality science, technology, and management globally. Its broad scope includes: - Treatment processes for water and wastewater, including residuals management in municipal, agricultural, and industrial contexts; - Water quality monitoring and assessment based on chemical, physical, and biological methods; - Research on inland, tidal, or coastal waters and urban water bodies, including surface and groundwater, as well as point and non-point sources of pollution; - Limnology of lakes, reservoirs, and rivers; - Management of solid and hazardous waste, including source characterization and the impact of pollution and control of leachate and gas emissions; - Environmental restoration, including soil and groundwater remediation; - Analysis of the interface between sediments and water, as well as water/atmosphere interactions; - Application of mathematical modeling and systems analysis techniques; - Public health and risk assessment; - Socioeconomic studies. The audience includes biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists.

《Water Research》是一份开放获取的期刊，拥有镜像期刊《Water Research X》，两者具有相同的目标和范围、编辑团队、提交系统以及严格的同行评审。该期刊在全球范围内发表关于水质科学、技术及其管理的原创研究论文。其研究范围广泛，涵盖以下几个方面：- 水和废水的处理过程，包括市政、农业和工业的残留物管理；- 基于化学、物理和生物方法的水质监测与评估；- 内陆、潮汐或沿海水域及城市水域的研究，包括地表水和地下水，以及点源和非点源污染；- 湖泊、蓄水池和河流的湖沼学；- 固体和危险废物管理，包括来源特征及其对污染的影响和控制渗滤液与气体排放；- 环境恢复，包括土壤和地下水的修复；- 沉积物与水之间的界面以及水/大气相互作用的分析；- 数学建模与系统分析技术的应用；- 公共卫生与风险评估；- 社会经济研究。受众包括生物学家、化学工程师、化学家、土木工程师、环境工程师、湖泊学家和微生物生物学家。

Category	Quartile
环境科学与生态学	1
环境科学与生态学, 工程环境	1
环境科学与生态学, 环境科学	1
环境科学与生态学, 水资源	1

A single-atom manganese nanozyme mediated membrane reactor for water decontamination

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