Silico-oxygen bonding integrated with nano-size pore enrichment enables sustainable low-oxidant-consumption Fenton-like chemistry

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-03-25 DOI:10.1016/j.watres.2025.123550

Qingbai Tian, Xin Zhang, Jiale Chang, Dongdong Chen, Siyuan You, Xiaoming Peng, Baoyu Gao, Yanan Shang, Bo Wei, Qian Li, Zhen Hu, Yue Gao, Xing Xu

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Abstract

Key bottlenecks of the persulfate-based advanced oxidation processes (AOPs) are the high dosage of persulfate and the secondary pollution of sulfate ion. In this work, a sustainable strategy involving the transformation of diatomite into a water purification catalyst consisting of nano-size pore enrichment and silico-oxygen bonding (Si/C@BD) was proposed. Results indicated that the pollutants with electron-donating groups can be quickly degraded by the Si/C@BD via amplified electron transfer process (ETP) under very low peroxymonosulfate (PMS) usage. Such “low-oxidant-consumption” Fenton-like chemistry can be also applied to other catalytic systems derived from a series of silicon-based materials. In addition, a pilot-scale device (54 L) based on ETP pathway was constructed, which provided a universal strategy to prevent direct contact of treated wastewater with oxidation additives, thereby solving the bottleneck of secondary pollution caused by sulfate dissolution associated with PMS oxidation systems. In addition, the Si/C@BD/PMS system exhibited the superior environmental significance and feasibility based on the quantitative analysis via the life cycle assessment (LCA). This work will be a significant contribution to the persulfate-based Fenton-like chemistry, emphasizing the low-persulfate-consumption and free-secondary-pollution characteristics with significant application value.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.