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Cow dung-derived biochars engineered as antibacterial agents for bacterial decontamination

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Journal of Environmental Sciences 2021年第7期33卷 33-43页

作者： Quanfu Yao Qinggele Borjihan Huihui Qu Yixuan Guo Ziying Zhao Long Qiao Ting Li Alideertu Dong Ying Liu College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China College of Chemistry and Environment Hohhot Minzu CollegeHohhot 010051China College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China Engineering Research Center of Dairy Quality and Safety Control Technology Ministry of EducationInner Mongolia UniversityHohhot 010021China

Disposal of the pollutants arising from farming cattle and other livestock threatens the environment and public safety in diverse ***,we report on the synthesis of engineered biochars using cow dung as raw material,and investigating these biochars as antibacterial agents for water *** coating the biochars with N-halamine polymer and loading them with active chlorine (i.e.,Cl+),we were able to regulate them on demand by tuning the polymer coating and bleaching *** obtained N-halamine-modified biochars were found to be extremely potent against Escherichia coli and Staphylococcus *** also investigated the possibility of using these N-halamine-modified biochars for bacterial decontamination in real-world *** findings indicated that a homemade filter column packed with N-halamine-modified biochars removed pathogenic bacteria from mining sewage,dairy sewage,domestic sewage,and artificial *** proposed strategy could indicate a new way for utilizing livestock pollutants to create on-demand decontaminants.

关键词： Cow dung biochars Polymer coating Antibacterial agent Bacterial decontamination

Adsorption and Desorption Characteristics of Cadmium Ion by Ash-Free biochars

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Journal of Renewable Materials 2020年第7期8卷 801-818页

作者： Li Fu Xianying Xu Guiquan Fu Renduo Zhang Hujun Liu College of Forestry Gansu Agricultural UniversityLanzhou730070China State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating Gansu Desert Control Research InstituteLanzhou730070China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen UniversityGuangzhou510006China

The aim of this study was to investigate adsorption and desorption characteristics of cadmium ion(Cd(II))by ash-free biochars and the adsorption *** were prepared using peanut shell,bamboo,and Sophora japonica ***-free biochars were obtained by treating the biochars with acid *** and desorption data from batch experiments were analyzed using the Langmuir and Freundlich models and three adsorption kinetics models(i.e.,the Pseudo second-order,Elovich model,and the Intraparticle diffusion models).Results showed that the acid elution improved the pore structure of biochars,increased C content and aromatic functional group content,enhanced biochars hydrophobicity and adsorption capacity for Cd(II).Ash-free peanut shell biochar showed the best Cd(II)adsorption performance among the *** of ash-free peanut shell biochar reached the equilibrium within 6 h with adsorption capacity of 34.2 mg/*** adsorption conditions were optimized by orthogonal *** Cd(II)removal efficiency achieved 91.7%with the optimized condition:initial concentration of Cd(II)of 50 mg/L,pH of 5,adsorption time of 12 h,and temperature of 15°*** adsorption of Cd(II)by the six biochars was best described with the Langmuir model,indicating that the adsorption was a physical-chemical composite *** desorption isotherm showed the hysteresis between adsorption and *** main mechanism of Cd(II)adsorption of the ash-free biochars was a complex interaction of physical and chemical reactions,mainly including electrostatic adsorption,cationic-π,and ligand exchange.

关键词： Ash-free biochars Cd(II) adsorption desorption

Elucidating dominant factors of PO43–, Cd2+ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars

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Chinese Chemical Letters 2019年第12期30卷 2221-2224页

作者： Zhanglin Liu Dong Tian Fei Shen Lulu Long Yanzong Zhang Gang Yang Yongmei Zeng Jing Zhang Jinsong He Ying Zhu Shihuai Deng Institute of Ecological and Environmental Sciences Sichuan Agricultural UniversityChengdu 611130.China Rural Environment Protection Engineering&Technology Center of Sichuan Province Sichuan Agricultural UniversityChengdu 611130China

biochars produced from crab shell(CSB),oak sawdust(OB),Jeru salem artichoke tuber(JAB) and sorghum grain(SB) displayed distinguishable adsorption-related characteristics,such as specific surface area(SSA),ash content and acidic oxygen-containing functional groups(AFGs),which linked to the biochar adsorption mechanisms of most ***,PO4^3-,Cd^2+,and nitrobenzene(NB) were employed for adsorption by these biochars to elucidate the dominant factors for the *** performance of the three pollutants onto these four biochars varied considerably,as exemplified by the excellent adsorption of PO4^3- and Cd^2+ onto CSB(225.3 and 116.0 mg/g,respectively) as compared with onto the other three biochars(4.2-37.1 mg/g for P043-and 9.7-41.0 mg/g for Cd^2+).OB displayed the best adsorption of NB(72.0 mg/g),followed by SB(39.5 mg/g),JAB(31.1 mg/g),and CSB(23.6 mg/g).The kinetics and isotherm adsorption assessments couple with material characterization suggested that the sorption of selected pollutants on biochars was attributed to the multiple mechanisms involved,including coprecipitation,chemical bonds,cation exchange,physical absorption,and *** path analysis suggested that AFGs and ash content in biochars were more important than SSA with regards to pollutant removal,especially,with ash playing a crucial role in the removal of Cd2+ and PO43-,and AFGs being mainly re s ponsible for NB *** findings might offer guidance on the preparation or modification of biochar with a targeted function for pollutant removal through an understanding the dominant factors.

关键词： biochars Adsorption Typical pollutants Dominant factors Path analysis

Physicochemical properties and morphology of biochars as affected by feedstock sources and pyrolysis temperatures

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Biochar 2019年第3期1卷 325-336页

作者： Joao Arthur Antonangelo Hailin Zhang Xiao Sun Ajay Kumar Department of Plant and Soil Sciences Oklahoma State University371 Agricultural HallStillwaterOK 74078-6028USA Department of Biosystems and Agricultural Engineering Oklahoma State University111 Agricultural HallStillwaterOK 74078USA

Feedstock sources and pyrolysis temperatures affect the physicochemical and morphological properties of *** evaluated biochars derived from switchgrass(SGB)and poultry litter(PLB)pyrolyzed at 350℃(SGB350,PLB350)and 700℃(SGB700,PLB700)to identify their potential ability in improving soil *** for SGB350,the pH of biochars was high(>10.0)and can be used as an amendment in acid ***700 had higher mineral content and nutrient availability due to its higher ash content(tenfold higher)and electrical *** functional groups responsible for metal retention were evidenced in all *** exchange capacity(CEC),specific surface area(SSA),and microporosity more than doubled by increasing pyrolysis temperature from 350 to 700℃.The pH-buffering capacity measured through acid titration curve was better than that calculated with acid/alkali *** pyrolyzed at 700℃ have much higher pH,CEC,SSA,and stronger buffering capacity,and thus are more promising to improve soil health and reduce contaminant bioavailability.

关键词： biochars Switchgrass Poultry litter Physicochemical properties Pyrolysis

Properties and applications of biochars derived from different biomass feedstock sources

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International Journal of Agricultural and Biological Engineering 2017年第2期10卷 242-250页

作者： Bai Xiaofeng Zhou Xiaoqin Li Zifu Ni Jiewen Bai Xue School of Energy and Environmental Engineering Beijing Key Laboratory of Resource-oriented Treatment of Industrial PollutantsUniversity of Science and Technology BeijingBeijing 100083China

In China,substantial agricultural and garden wastes are burned *** practice not only wastes resources but also pollutes *** straw and poplar leaves are typical agricultural and garden waste in *** this study,corn straw and poplar leaves were used to prepare biochars with different pyrolysis temperatures(250℃,350℃,450℃,550℃and 650℃)and were labeled as CC(corn straw)and LC(poplar leaves),*** biochars were characterized through elemental analysis,Brunauer-Emmett-Teller surface area analysis,scanning electron microscopy and Fourier transform infrared ***,ash content and biochar pH were also *** showed that the two biochars possessed some similar characteristics with increasing pyrolysis *** attributes included increased carbon content,biochar hydrophobicity,alkaline pH;decreased hydrogen and oxygen contents and polar functional group content;and enlarged surface *** biochars also displayed some different characteristics,such as the obviously larger surface area of CC than that of LC at high pyrolysis temperatures and the regular holes of CC and irregular and disordered holes of *** biochars CC-650 and LC-650 were used as soil conditioners,the soil pH increased by 0.3 and 0.4 units,respectively,and the soil cation exchange capacity increased by 12.7%and 21.5%,respectively,with respect to those of the blank controls.

关键词： biochars corn straw poplar leaves pyrolysis thermochemical property

Understanding the biochar’s role in ameliorating soil acidity

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Journal of Integrative Agriculture 2019年第7期18卷 1508-1517页

作者： SHI Ren-yong LI Jiu-yu NI Ni XU Ren-kou State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008P.R.China Nanjing Institute of Environmental Science Ministry of Ecology and EnvironmentNanjing 210042P.R. China Key Laboratory of Pesticide Environmental Assessment and Pollution Control Ministry of Ecology and EnvironmentNanjing 210042P.R.China

Extensive acidic soils,which suffer from accelerated soil acidification,are found in southern *** acidity,aluminum toxicity,and nutrient deficiencies severely limited crop productivity in acidic *** has been widely reported that crop residue biochars can ameliorate acidic soils and increase crop ***,we summarized the positive effects and mechanisms involved in the correction of soil acidity,the alleviation of aluminum toxicity and the increase of soil pH buffering capacity by crop residue *** carbonate,oxygen-containing functional groups and silicates in biochars are the major components responsible for their efficacy in amending acidic soils and resisting soil *** conclude that application of crop residue biochars may be a better option than traditional liming to ameliorate acidic ***,further researches into soil acidification are still required to address some issues that are controversial and poorly understood.

关键词： aluminum toxicity crop residue biochars pH buffering capacity soil acidity

Lithium-Metal Free Sulfur Battery Based on Waste Biomass Anode and Nano-Sized Li_(2)S Cathode

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Energy & Environmental Materials 2024年第2期7卷 39-47页

作者： Pejman Salimi Eleonora Venezia Somayeh Taghavi Sebastiano Tieuli Lorenzo Carbone Mirko Prato Michela Signoretto Jianfeng Qiu Remo Proietti Zaccaria Istituto Italiano di Tecnologia via Morego 30Genoa 16163Italy Department of Chemistry and Industrial Chemistry University of Genovavia Dodecaneso 311-16146Genoa Italy CATMAT Lab Department of Molecular Sciences and NanosystemsCa'Foscari University Venice and INSTM ConsortiumRU of VeniceVia Torino 15530172Venezia Mestre Italy Department of Physics Shaoxing UniversityShaoxing 312000China

The realization of a stable lithium-metal free(LiMF)sulfur battery based on amorphous carbon anode and lithium sulfide(Li_(2)S)cathode is here *** particular,a biomass waste originating full-cell combining a carbonized brewer's spent grain(CBSG)biochar anode with a Li_(2)S-graphene composite cathode(Li_(2)S70Gr30)is *** design is particularly attractive for applying a cost-effective,high performance,environment friendly,and safe anode material,as an alternative to standard graphite and metallic lithium in emerging battery *** anodic and cathodic materials are characterized in terms of structure,morphology and composition through X-ray diffraction,scanning and transmission electron microscopy,X-ray photoelectron and Raman ***,an electrochemical characterization comprising galvanostatic cycling,rate capability and cyclic voltammetry tests were carried out both in half-cell and full-cell *** systematic investigation reveals that unlike graphite,the biochar electrode displays good compatibility with the electrolyte typically employed in sulfur *** CBSG/Li_(2)S70Gr30 full-cell demonstrates an initial charge and discharge capacities of 726 and 537 mAh g^(-1),respectively,at 0.05C with a coulombic efficiency of 74%.Moreover,it discloses a reversible capacity of 330 mAh g^(-1)(0.1 C)after over 300 *** on these achievements,the CBSG/Li_(2)S70Gr30 battery system can be considered as a promising energy storage solution for electric vehicles(EVs),especially when taking into account its easy scalability to an industrial level.

关键词： biochars ether-based electrolytes lithium sulfide lithium-metal free batteries superior cycling stability

Microporous bamboo biochar for lithium-sulfur batteries

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Nano Research 2015年第1期8卷 129-139页

作者： Xingxing Gu Yazhou Wang Chao Lai Jingxia Qiu Sheng Li Yanglong Hou Wayde Martens Nasir Mahmood Shanqing Zhang Centre for Clean Environment and Energy Environmental Futures Research Institute Griffith School of Environment Gold Coast Campus Griffith University QLD 4222 Australia Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Science and Engineering Faculty Queensland University of Technology QLD 4001 Australia

Being simple, inexpensive, scalable and environmentally friendly, microporous biomass biochars have been attracting enthusiastic attention for application in lithium-sulfur （Li-S） batteries. Herein, porous bamboo biochar is activated via a KOH/annealing process that creates a microporous structure, boosts surface area and enhances electronic conductivity. The treated sample is used to encapsulate sulfur to prepare a microporous bamboo carbon-sulfur （BC-S） nanocomposite for use as the cathode for Li-S batteries for the first time. The BC-S nanocomposite with 50 wt.% sulfur content delivers a high initial capacity of 1,295 mA-h/g at a low discharge rate of 160 mA/g and high capacity retention of 550 mA-h/g after 150 cycles at a high discharge rate of 800 mA/g with excellent coulombic efficiency （995%）. This suggests that the BC-S nanocomposite could be a promising cathode material for Li-S batteries.

关键词： biochars lithium-sulfur batteries microporous structure bamboo carbon-sulfur composites