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Pyrolyzed biomass-derived nanoparticles:a review of surface chemistry,contaminant mobility,and future research avenues to fill the gaps

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Biochar 2022年第1期4卷 635-651页

作者： logan swaren Salman Safari Kurt O.Konhauser Daniel S.Alessi Department of Earth and Atmospheric Sciences University of Alberta3-16 Earth Sciences BuildingEdmontonAB T6G 2E3Canada

Nanoparticles are abundant in the subsurface,soil,streams,and water bodies,and are often a critical control on elemental speciation,transport and cycling in the natural *** review provides an overview of pyrolyzed biomass-derived nanoparticles(PBNPs),their surface properties and reactivity towards aqueous *** focus specifically on biochar-derived nanoparticles and activated carbon-derived nanoparticles which fall under our classification of *** carbon-iron(nano)composites are included in some instances where there are significant gaps in literature because of their environmental *** use of activated carbon,along with a resurgence in the manufacture and application of biochar for water treatment and soil amendment,has generated significant concerns about the mobility and toxicity of PBNPs derived from the bulk material in environmental *** examples are discussed to highlight current progress in understanding the influence of PBNPs on contaminant transport,followed by a critical discussion of gaps and future research directions.

关键词： Nanoparticles Surface chemistry Activated carbon Biochar

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Water decontamination by reactive high-valent iron species

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Eco-Environment & Health 2024年第1期3卷 55-58页

作者： Yunhui Zhang logan swaren Wenbing Wang College of Environmental Science and Engineering Tongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Earth and Atmospheric Sciences University of AlbertaEdmontonAlberta T6G 2E3Canada School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China

The occurrence of emerging organic contaminants(EOCs)in water bodies has received increasing attention ***,such as pharmaceuticals and pesticides,when present in trace concentrations,cannot be effectively removed by conventionally designed treatment processes in most wastewater treatment ***,advanced oxidation processes(AOPs)have been developed as promising alternatives for trace-level EOC elimination using radicals(e.g.,hydroxyl radicals and sulfate radicals)and non-radical ***,these reactive species are generally nonselective and also exhibit excellent reactivity with background water constituents,leading to excess consumption of oxidants and the possible generation of toxic secondary pollutants[1].Accordingly,selective oxidants have recently become a subject of considerable interest,mainly including singlet oxygen and high-valent metal species[2].They could preferentially attack electron-rich moieties,resulting in selective degradation of EOCs.

关键词： valent removed elimination

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