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Recent advancements in graphene adsorbents for wastewater treatment:Current status and challenges

Chinese Chemical Letters 2020年第10期31卷 2525-2538页

作者： MD Faysal Hossain nasrin akther Yanbo Zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and TechnologyShanghai 200237China

From emerging pollutants to emerged threat,researchers are continuously looking for promising technologies for wastewater *** has been identified as the most convenient approach for treating wastewater at low-cost and with ***,graphene and its derivatives have gained heightened attention as novel adsorbents because of their unique molecular structure and outstanding physicochemical *** metals,dyes,polycyclic aromatic hydrocarbons(PAHs)and other pollutants,which are widely concerned recently,all show different adsorption *** functional groups,resonating and delocalizedπ-electron system of graphene derivatives lead to the formation of various adsorptive interactions i.e.,π-πinteractions,electrostatic interactions,Hbonding,*** these venomous pollutants,and quarantine them in *** pristine form of graphene subsidiaries tends to exhibit low sorption efficiency due to high propensity of agglomeration,lack of selectivity,hydrophobicity and difficulty in phase separation a fter ***,designing of efficient graphene composites through the surface modification with numerous functional groups,polymers or nanoparticles is an ongoing *** graphene composites are increasingly reported,but the fate of pollutants and adsorption mechanisms are still far to be fully *** review summarizes the recent progresses in the application of graphene-based adsorbents for eliminating a wide range of organic and inorganic pollutants from wastewater.A critical explanation is provided on the synthesis of graphene adsorbents,systematic adsorption and desorption mechanisms along with their pollutant removal performances under different experimental conditions.A brief perspective on upcoming research needs and challenges involved in the designing of high-quality graphene-based adsorbents are highlighted.

关键词： Wastewater Adsorption Graphene composites Interaction mechanism Regeneration

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