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Jellyfish-inspired alginate composite hydrogel filter prepared by macro-micro double bionic strategy for efficient water purification

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 141-157页

作者： Huiting Peng Yan Chen Jiaopan Lin Chelsea Benally Mohamed Gamal El-Din Junkai Gao School of Naval Architecture and Marinetime Zhejiang Ocean UniversityZhoushan 316022China Department of Civil and Environmental Engineering University of AlbertaEdmontonAB T6G 1H9Canada

Recently,research on hydrogel materials with a porous structure and superior water absorption capabilities significantly ***,the hydrogel under gravity-driven separation conditions often exhibit an unstable pore structure,poor mechanical properties,and limited *** this end,this work presents a novel approach that combines a macro-micro double bionic strategy with a triple crosslinking method to develop a multifunctional alginate composite hydrogel filter(2%-SA-κCG-PVA-Ca^(2+),2%-SKP-Ca^(2+)for short)with a stable pore structure and superior mechanical properties,which possessed an umbrella-shaped structure resembling that of *** 2%-SKPCa^(2+)filter was synthesized using polyvinyl alcohol(PVA)as a stable structure-directing agent,and sodium alginate(SA)andκ-carrageenan(κ-CG)as polymer *** distinctive umbrellashaped hydrogel of 2%-SKP-Ca^(2+)filter,formed through the triple crosslinking method,overcomes the limitations of unstable pore structure and poor durability seen in hydrogels prepared by traditional crosslinking ***,the utilization of the 2%-SKP-Ca^(2+)filter in water treatment demonstrates its good selective permeability,excellent resistance to fouling,and extended longevity,which enables it to simultaneously achieve the multifunctional water purification and the coating of multi-substrate anti-fouling ***,not only does this research provide an efficient,multifunctional,highly pollution-resistant preparation method for designing a new filter,but it also confirms the application prospect of the macro-micro dual bionic strategy developed in this study in complex water treatment.

关键词： Triple crosslinking method Alginate Umbrella-shaped Jellyfish water purification

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Superwetting Ag/α-Fe_(2)O_(3) anchored mesh with enhanced photocatalytic and antibacterial activities for efficient water purification

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Green Energy & Environment 2024年第1期9卷 89-103页

作者： Jiakai Li Changpeng Lv Jiajia Song Xiaoling Zhang Xizhen Huang Yingzhuo Ma Haijie Cao Na Liu Department of Chemistry Tsinghua UniversityBeijing100084China Anhui Provincial Engineering Laboratory of Silicon-based Materials Engineering Technology Research Center of Silicon-based Materials(Anhui)School of Material and Chemical EngineeringBengbu UniversityBengbu233030China Institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao UniversityQingdao266071China

Superwetting materials have drawn unprecedented attention in the treatment of oily wastewater due to their preferable anti-fouling property and selective oil/water ***,it is still a challenge to fabricate multifunctional and environmentally friendly materials,which can be stably applied to purify the actual complicated ***,a Ag/Ag/α-Fe_(2)O_(3) heterostructure anchored copper mesh was intentionally synthesized using a facile two-step hydrothermal *** resultant mesh with superhydrophilicity and underwater superoleophobicity was capable of separating various oil/water mixtures with superior separation efﬁciency and high permeationﬂux driven by ***ﬁting from the joint effects of the smaller band gap of Ag/α-Fe_(2)O_(3) heterojunction,inherent antibacterial capacity of Ag/α-Fe_(2)O_(3) and Ag nanoparticles,favorable conductive substrate,as well as the hierarchical structure with superwettability,such mesh presented remarkably enhanced degradation capability toward organic dyes under visible light irradiation and antibacterial activity against both Escherichia coli(***)and Staphylococcus aureus(***)compared with the pure Ag/α-Fe_(2)O_(3) coated ***,the mesh exhibited bifunctional water puriﬁcation performance,in which organic dyes were eliminated simultaneously from water during oil/water separation in oneﬁltration *** importantly,this mesh behaved exceptional chemical resistance,mechanical stability and long-term ***,this material with multifunctional integration may hold promising potential for steady water puriﬁcation in practice.

关键词： Superwetting Ag/α-Fe_(2)O_(3)heterostructure Enhanced photocatalytic and antibacterial activities water purification Long-term reusability

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Potential and prospects in molecular orbital level micro-electric field for low energy consumption water purification

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National Science Open 2024年第3期3卷 194-233页

作者： Lai Lyu Yumeng Wang Chao Lu Fan Li Wenrui Cao Yingtao Sun Chun Hu Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou University

Conventional water purification technologies struggle to simultaneously address purification efficiency and energy *** orbital level surface micro-electric field（MEF）-driven water purification is an original and innovative concept conceived and developed by our group in recent *** core idea involves creating electron-rich and electron-poor micro-areas on the nanomaterial surface,which drive pollutants or H2O molecules to provide electrons in the electron-poor micro-areas while other environmental factors（such as H2O2and O2） obtain electrons in the electron-rich *** process effectively utilizes the internal energy contained within wastewater and emerging contaminants（ECs）.Centered on this core,this review systematically examines the discovery,construction,and characteristics of MEF and MEF-like systems and summarizes their application *** challenges,bottlenecks,and future development directions of MEF technology are also analyzed and *** of MEFs can facilitate the development of low-consumption,high-efficiency water purification technologies.

关键词： molecular orbital micro-electric field low energy consumption water purification pollutant utilization

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An all-in-one FeO_(x)-rGO sponge fabricated by solid-phase microwave thermal shock for water evaporation and purification

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Journal of Environmental Sciences 2024年第4期138卷 671-683页

作者： Youkun Sun Xiuwen Zhao Xueling Song Jinchen Fan Junhe Yang Yingchun Miao Shuning Xiao School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China College of Chemistry and Environmental Science Qujing Normal UniversityQujing 655011China Prytula Igor Collaborate Innovation Center for Diamond Shanghai Jian Qiao UniversityShanghai 201306China

Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of *** much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex ***,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal *** narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light *** abundantπorbitals in rGO promote electron excitation and thermal vibration between the *** of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted *** optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification *** findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.

关键词： Desalination Photothermal device Microwave synthesis water purification FeO_(x)-rGO

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water purification with sintered porous materials fabricated at 400℃ from sea bottom sediments

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Journal of Environmental Sciences 2008年第2期20卷 172-176页

作者： DABWAN Ahmed H A IMAI Daizo KANECO Satoshi SENMATSU Isamu NAKAHAMA Katsuyuki KATSUMATA Hideyuki SUZUKI Tohru OHTA Kiyohisa Mie Industry and Enterprise Support Center ShimaMie 517-0501Japan Mie Industry and Enterprise Support Center ShimaMie 517-0501Japan Department of Chemistry for MaterialsGraduate School of EngineeringMie UniversityMie 514-8507Japan. Department of Chemistry for Materials Graduate School of EngineeringMie UniversityMie 514-8507Japan. Environmental Preservation Center Mie UniversityMie 514-8507Japan Department of Chemistry for Materials Graduate School of EngineeringMie UniversityMie 514-8507Japan. Environmental Preservation CenterMie UniversityMie 514-8507Japan

A sintering technology for preparing porous materials from sea bottom sediments was developed for use in water purification. The purpose of the present study was to develop methods for converting the sea bottom sediments dredged from Ago Bay into value-added recycled products. The sintered products fabricated at 400℃ were found to be very effective adsorbents for the removal of heavy metals.

关键词： sintering preparation technology porous materials sea bottom sediments water purification heavy metals

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water purification： Adsorption over Metal-Organic Frameworks

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Chinese Journal of Chemistry 2016年第2期34卷 175-185页

作者： Siqing Li Yifa Chen Xiaokun Pei Shenghan Zhang Xiao Feng Junwen Zhou Bo Wang Key Laboratory of Cluster Science Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry Beijing Institute of Technology Beijing 100081 China

water pollution relating to human beings＇ health is a universal problem across community society. Highly efficient, economically feasible and easily achievable approaches are long-sought-after for water purification. Adsorption processes with porous materials （e.g. zeolites, activated carbon, silica gel, metal-organic frameworks （MOFs）） have drawn much attention in this field during past decades. In it, MOFs with numerous active sites, uniform porosity and tailorable structure diversity are arising to be one of the most promising adsorbents for water purification. During the adsorption processes, influence factors that determine or affect the usability and performances of MOFs are mainly focused on the stability of MOFs, their affinity for contaminants and the conducting conditions （pH, ini- tial concentration of the contaminants）. In this review, we will systematically present the performances of MOFs （mainly focused on MOF crystals, MOF nanomaterial or MOF composites will be beyond the scope of this review） for contaminants purification （inorganic and organic contaminants） in water and give a detailed discussion about the connection among their performances, conducting condition factors and potential interaction mechanisms （e.g. electrostatic interactions, coordination or p-p interaction）. We hope this review will be beneficial to the design, regeneration and reuse of MOF adsorbents and promote the development of MOFs for water purification.

关键词： metal-organic frameworks adsorption adsorbents contaminants water purification

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Research progress of novel adsorption processes in water purification: A review

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Journal of Environmental Sciences 2008年第1期20卷 1-13页

作者： QU Jiuhui State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

As an effective, efficient, and economic approach for water purification, adsorbents and adsorption processes have been widely studied and applied in different aspects for a long time. In the recent years, a lot of novel adsorption processes have been developed for enhancing the efficiency of removing the organic and inorganic contaminants from water. This article reviews some new adsorbents and advanced adsorption methods that specialize in their compositions, structures, functions, and characteristics used in water treatment. The review emphasizes adsorption/catalytic oxidation process, adsorption/catalytic reduction process, adsorption coupled with redox process, biomimetic sorbent and its sorption behaviors of POPs, and modified adsorbents and their water purification efficiency.

关键词： adsorbents adsorption pollutants water purification

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Boron and nitrogen co-doped porous carbon derived from sodium alginate enhanced capacitive deionization for water purification

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Frontiers of Chemical Science and Engineering 2023年第12期17卷 2014-2024页

作者： Xiao Yong Pengfei Sha Jinghui Peng Mengdi Liu Qian Zhang Jianhua Yu Liyan Yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Department of Physics Hamline UniversitySaint PaulMN 55104USA

Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this work, B and N co-doped porous carbon with micro-mesoporous structures is derived from sodium alginate by a carbonization, activation, and hydrothermal doping process, which exhibits large specific surface area (2587 m^(2)·g^(‒1)) and high specific capacitance (190.7 F·g^(‒1)) for adsorption of salt ions and heavy metal ions. Furthermore, the materials provide a desalination capacity of 26.9 mg·g−1 at 1.2 V in 500 mg·L^(‒1) NaCl solution as well as a high removal capacity (239.6 mg·g^(‒1)) and adsorption rate (7.99 mg·g^(‒1)·min^(‒1)) for Pb2+ with an excellent cycle stability. This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ions and heavy metal ions.

关键词： capacitance deionization porous carbon B N co-doping heavy metal ions water purification

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The progress of catalytic technologies in water purification:A review

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Journal of Environmental Sciences 2009年第6期21卷 713-719页

作者： LI Dapeng QU Jiuhui National Natural Science Foundation of China Beijing 100085 China Research Center for Eeo-Envrionmental Sciences Chinese Academy of Sciences Beijing 100085 China

Catalytic technologies have been paid increasing attention in refractory pollutants abatement due to its practical and potential values in water purification. As effective and efficient approaches for water purification, Fenton＇s reagent, ozonation, electrochemical and photocatalytic methods have been widely studied and applied in different aspects and have been reviewed by several articles. In recent years, some novel catalytic processes based on above processes have been developed for enhancing the efficiency of removing the organics from water. This review emphasized on the recent development of heterogeneous catalytic ozonation, electrocatalysis in respect of novel electrodes and electro-Fenton method, photoelectrocatalysis process and photoelectron-Fenton in water purification. It was also an attempt to propose general ideas about mechanism and principle enhancing the catalytic efficiency for the degradation and the mineralization of organics in water.

关键词： catalytic technology water purification heterogeneous catalytic ozonation electrocatalysis electro-Fenton photoelectro- catalysis photoelectro-Fenton

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Hierarchically porous polymers with ultra-high affinity for bisphenol A enables high efficient water purification

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Science China Chemistry 2021年第8期64卷 1389-1400页

作者： Zelun Li Juan Wang Qian Chen Kelong Ai Lehui Lu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China Department of Pharmacology Xiangya School of Pharmaceutical SciencesCentral South UniversityChangsha410078China

The widespread use of bisphenol A(BPA)poses a serious threat to the environment and human ***,efficient removal of BPA in water is incredibly challenging,owing to the inert chemical nature and electrical neutrality of *** order to solve this problem,for the first time,we propose that a strategy of designing conjugated porous polymers with the pore size matching the size of BPA can greatly enhance the binding force of *** this basis,we developed a novel conjugated poly 1,3,5-tri[4-(diphenylamino)phenyl]benzene(MPDPB)with intrinsic pore matching the size of BPA and multi-stage porous structure by editing polymerization with *** binding energy of MPDPB to BPA is the highest at present(37.84 kcal/mol),which is 2.3 times that of the most powerful adsorbent previously reported and five times that of the conventional *** advantages make MPDPB have super-high adsorption performance towards BPA and high absorbing stability under extreme ***,MPDPB could be easily loaded on a non-woven fabric to generate point-of-use devices,which could eliminate more than 99.8%of BPA,making it the best BPA candidate adsorbent *** believe that the proposed material design derived from the specific structure of the contaminant molecule can be extended to exploring further innovative adsorbents.

关键词： bisphenol A porous polymer water purification adsorbent micropollutant

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