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Carbon-negative cement-bonded biochar particleboards

Biochar 2022年第1期4卷 219-227页

作者： Liang Chen Yuying Zhang Claudia Labianca Lei Wang Shaoqin Ruan Chi Sun Poon yong sik ok Daniel C.W.Tsang Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China Research Centre for Resources Engineering Towards Carbon Neutrality The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Korea

Biochar from bio-waste pyrolysis presents excellent CO_(2) sequestration *** study innovated the design of cement-bonded particleboards utilizing a substantial amount of 50-70 wt.%pre-soaked biochar to render the products *** investigated the roles of biochar in magnesium oxysulfate cement(MOSC)system and demonstrated good mechanical and functional properties of biochar cement *** the presence of biochar,the amounts of hydration products were enriched in the cement systems as illustrated by the thermogravi-metric analyses(TGA)and X-ray diffraction(XRD).We further incorporated supplementary cementitious materials(SCMs)and generated 5 Mg(OH)_(2)⋅MgSO_(4)·7H_(2)O(5-1-7)phase in the MOSC *** a result,our designs of biochar particleboards satisfied the standard requirements for flexural strength(>5.5 MPa)and thickness swelling(<2%).Moreover,our biochar particleboards presented a low thermal conductivity as the biochar pores disrupted thermal bridging within *** illustrated that the high dosage ratio of biochar could significantly offset the CO_(2) emissions of the particleboards(i.e.,carbon-negative)via life cycle *** economic profits could also be accomplished for the biochar *** instance,the 50BC-MOSC bonded particleboard(with 50 wt.%pre-soaked biochar as aggregate,50 wt.%MOSC as binder)with promising mechanical properties could store 137 kg CO_(2) tonne^(−1) and yield an overall economic profit of 92 to 116 USD m^(−3) depending on the carbon prices in different *** summary,our new designs of carbon-negative biochar particleboards could curtail carbon emissions in the construction materials and promote the realization of carbon neutrality and circular economy.

关键词： Biochar-cement composite Carbon neutrality Wood waste biochar Magnesium oxysulfate cement Climate-positive construction materials

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Biochar as construction materials for achieving carbon neutrality

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Biochar 2022年第1期4卷 194-218页

作者： Yuying Zhang Mingjing He Lei Wang Jianhua Yan Bin Ma Xiaohong Zhu yong sik ok Viktor Mechtcherine Daniel C.W.Tsang Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Laboratory for Waste Management Nuclear Energy and SafetyPaul Scherrer Institute5232 VilligenSwitzerland School of Civil Engineering University of LeedsWest YorkshireLeedsUK Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoulKorea Institute of Construction Materials Technische Universität Dresden01062 DresdenGermany Research Centre for Resources Engineering towards Carbon Neutrality The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Biochar is a waste-derived material that can sequester carbon at a large *** development of low-carbon and sustainable biochar-enhanced construction materials has attracted extensive ***,having a porous nature and highly functionalised surface,can provide nucleation sites for chemical reactions and exhibit compatibility with cement,asphalt,and polymer *** study critically reviewed the state-of-the-art biochar-enhanced construction materials,including biochar-cement composites,biochar-asphalt composites,biochar-plastic composites,*** efficacies and mechanisms of biochar as construction materials were articulated to improve their functional *** critical review highlighted the roles of biochar in cement hydration,surface functional groups of engineered biochar for promoting chemical reactions,and value-added merits of biochar-enhanced construction materials(such as humidity regulation,thermal insulation,noise reduction,air/water purification,electromagnetic shielding,and self-sensing).The major properties of biochar are correlated to the features and functionalities of biochar-enhanced construction *** advances in our understanding of biochar’s roles in various composites can foster the next-generation design of carbon-neutral construction materials.

关键词： Engineered biochar Biomass waste management Carbon-negative materials Carbon neutrality Supplementary cementitious materials Sustainable construction

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Arsenic removal from water and soils using pristine and modified biochars

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Biochar 2022年第1期4卷 255-280页

作者： Wei Zhang Yoora Cho Meththika Vithanage Sabry M.Shaheen Jörg Rinklebe Daniel S.Alessi Chia-Hung Hou Yohey Hashimoto Piumi Amasha Withana yong sik ok Korea Biochar Research Center APRU Sustainable Waste Management and Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841South Korea School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China Ecosphere Resilience Research Center Faculty of Applied SciencesUniversity of Sri JayewardenepuraNugegoda 10250Sri Lanka Sustainability Cluster University of Petroleum and Energy StudiesUttarkhandDehradunIndia The Institute of Agriculture The University of Western AustraliaCrawleyAustralia School of Architecture and Civil Engineering Institute of Foundation EngineeringWater-and Waste-ManagementLaboratory of Soil-and Groundwater-ManagementUniversity of WuppertalPauluskirchstraße742285 WuppertalGermany Department of Earth and Atmospheric Sciences University of AlbertaEdmontonAB T6G 2E3Canada Graduate Institute of Environmental Engineering National Taiwan UniversityTaipei 10617TaiwanChina Department of Bioapplications and Systems Engineering Tokyo University of Agriculture and TechnologyTokyoJapan Department of Arid Land Agriculture Faculty of MeteorologyEnvironmentand Arid Land AgricultureKing Abdulaziz University21589 JeddahSaudi Arabia Department of Soil and Water Sciences Faculty of AgricultureUniversity of Kafrelsheikh33516 Kafr El-SheikhEgypt

Arsenic(As)is recognized as a persistent and toxic contaminant in the environment that is harmful to ***,a porous carbonaceous material with tunable functionality,has been used widely as an adsorbent for remediating As-contaminated water and *** types of pristine and modified biochar are available,and significant efforts have been made toward modifying the surface of biochars to increase their adsorption capacity for *** capacity is influenced by multiple factors,including biomass pyrolysis temperature,pH,the presence of dissolved organic carbon,surface charge,and the presence of phosphate,silicate,sulfate,and microbial *** As adsorption in modified biochars is attributed to several mechanisms including surface complexation/precipitation,ion exchange,oxidation,reduction,electrostatic interactions,and surface functional groups that have a relatively higher affinity for *** biochars show promise for As adsorption;however,further research is required to improve the performance of these *** example,modified biochars must be eco-friendly,cost-effective,reliable,efficient,and sustainable to ensure their widespread application for immobilizing As in contaminated water and *** relevant research to address these issues relies on a thorough understanding of biochar modifications to *** study presents an in-depth review of pristine and modified biochars,including their production,physicochemical properties,and As adsorption ***,a comprehensive evaluation of biochar applications is provided in As-contaminated environments as a guide for selecting suitable biochars for As removal in the field.

关键词： Engineered biochar Removal mechanisms Arsenic pollution Water pollution Soil pollution

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Recent advances in controlled modification of the size and morphology of metal-organic frameworks

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Nano Research 2018年第9期11卷 4441-4467页

作者： Botao Liu Kowsalya Vellingiri Sang-Hee Jo Pawao Kumar yong sik ok Ki-Hyun Kim Department of Civil & Environmental Engineering Hanyang University 222 Wangsimni-Ro Seou104763 Republic of Korea Environmental and Water Resources Engineering Division Department of Civil Engineering IITMadras Chennoi 600 036 India Department of Nano Science and Materials Central University ofJammu Jammu J & K- 180011 India Korea Biochar Research Center O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering Korea University Seou102841 Republic of Korea

Advances in metal-organic frameworks （lVIOFs） resulted in significant contributions to diverse applications such as carbon capture, gas storage, heat transformation and separation along with emerging applications toward catalysis, medical imaging, drug deliver~ and sensing. The unique in situ and ex situ structural features of MOFs can be tailored by conceptual selection of the organic （e.g., ligand） and inorganic （e.g., metal） components. Here, we provide a comprehensive review on the synthesis and characterization of MOFs, particularly with respect to controlling their size and morphology. A better understanding of the specific size and morphological parameters of MOFs will help initiate a new era for their real-world applications. Most importantly, this assessment will help develop novel synthesis methods for MOFs and their hybrid/porous materials counterparts with considerably improved properties in targeted applications.

关键词： metal-organic frameworks smart materials novel synthesis advanced materials composite materials green chemistry

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Effect of barley straw biochar application on greenhouse gas emissions from upland soil for Chinese cabbage cultivation in short-term laboratory experiments

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Journal of Mountain Science 2016年第4期13卷 693-702页

作者： Se-Won KANG Dong-Cheol SEO yong-Hwa CHEONG Ju-Wang PARK Jong-Hwan PARK Hang-Won KANG Ki-Do PARK yong sik ok Ju-sik CHO Department of Medicinal & Industrial Crops Korea National College of Agriculture and Fisheries Division of Applied Life Science (BK21 Program) & Institute of Agriculture and Life Sciences Gyeongsang National University Department of Bio-environmental Sciences Sunchon National University National Institute of Crop Science Rural Development Association Korea Biochar Research Center & Department of Biological Environment Kangwon National University

Chinese cabbage was cultivated in upland soil with the addition of biochar in order to investigate the potential for reduction of greenhouse gas emissions. Barley straw biochar(BSB) was introduced in a Wagner pot(1/5000a) in amounts of 0(BSB0, control), 100(BSB100), 300(BSB300), and 500(BSB500) kg 10a^(-1). After the addition of BSB into the upland soil, carbon dioxide(CO_2) emission increased while methane(CH_4) and nitrous oxide(N_2O) emissions decreased. The highest CO2 flux was measured for the BSB500 sample,(84.6 g m^(-2)) followed by BSB300, BSB100, and BSB0 in decreasing order. Relative to those of control, the total CH_4 flux and N_2O flux for the BSB500 treatment were lower by 31.6% and 26.1%, respectively. The global warming potential(GWP) of the treatment without biochar was 281.4 g CO_2 m-2 and those for treatments with biochar were in the range from 194.1 to 224.9 g CO_2 m^(-2). Therefore, introducing BSB into upland soil to cultivate Chinese cabbages can reduce the global warming potential.

关键词：温室气体排放旱地土壤土壤栽培生物炭大白菜麦秸秆实验室实验 CO2通量

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Long-term outcome of stem cell transplantation with and without anti-tumor necrotic factor therapy in perianal fistula with Crohn’s disease

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World Journal of Stem Cells 2024年第3期16卷 257-266页

作者： Min Young Park yong sik Yoon Jae Ha Park Jong Lyul Lee Chang sik Yu Division of Colon and Rectal Surgery Department of SurgeryYonsei University College of MedicineSeoul 03722South Korea Division of Colon and Rectal Surgery Department of SurgeryUniversity of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea

BACKGROUND Stem cell transplantation is a promising therapeutic option for curing perianal fistula in Crohn’s disease(CD).Anti-tumor necrotic factor(TNF)therapy combined with drainage procedure is effective as ***,previous studies are limited to proving whether the combination treatment of biologics and stem cell transplantation improves the effect of fistula *** This study aimed to evaluate the long-term outcomes of stem cell transplantation and compare Crohn’s perianal fistula(CPF)closure rates after stem cell transplantation with and without anti-TNF therapy,and to identify the factors affecting CPF closure and *** The patients with CD who underwent stem cell transplantation for treating perianal fistula in our institution between Jun 2014 and December 2022 were *** data were compared according to anti-TNF therapy and CPF *** A total of 65 patients were *** median age of females was 26 years(range:21-31)and that of males was 29(44.6%).The mean follow-up duration was 65.88±32.65 months,and complete closure was observed in 50(76.9%)*** closure rates were similar after stem cell transplantation with and without anti-TNF therapy(66.7%vs 81.6%at 3 year,P=0.098).The patients with fistula closure had short fistulous tract and infrequent proctitis and anorectal stricture(P=0.027,0.002,and 0.008,respectively).Clinical factors such as complexity,number of fistulas,presence of concurrent abscess,and medication were not significant for *** cumulative 1-,2-,and 3-year closure rates were 66.2%,73.8%,and 75.4%,*** Anti-TNF therapy does not increase CPF closure rates in patients with stem cell ***,both refractory and non-refractory CPF have similar closure rates after additional anti-TNF *** tract length,proctitis,and anal stricture are risk factors for non-closure in patients with CPF after stem cell transplantation.

关键词： Crohn’s disease Anus Fistula Stem cell transplantation Tumor necrosis factor-alpha inhibitors Infliximab

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Short- and long-term outcomes of surgical treatment in patients with intestinal Behcet’s disease

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 429-437页

BACKGROUND Behcet’s disease(BD),a chronic vasculitic disorder affecting multiple organs,is characterized by recurrent oral and genital ulcers,arthritis,vasculitis,and intes-tinal *** intestinal involvement of BD is common in East Asia,the efficacy and long-term outcomes of surgical treatment of intestinal BD still remain to be *** To evaluate the postoperative clinical course of intestinal BD and determine factors associated with its *** Data from patients who underwent surgical treatment for intestinal BD between January 2010 and August 2021 were retrospectively ***’demo-graphics,clinical features,postoperative course,complications,and follow-up data were *** We analyzed 39 surgeries in 31 *** mean patient age was 45.1 years,and the mean interval between the diagnosis of intestinal BD and surgical treatment was 4.9 years(range 1.0-8.0 years).The most common indication for surgery was medical intractability(n=16,41.0%),followed by fistula or abscess(n=11,28.2%).Laparoscopic approaches were used in 19 patients(48.7%),and 5 patients(12.8%)underwent emergency *** most common surgical procedure was ileocecal resection(n=18,46.2%),followed by right colectomy(n=11,28.2%).A diverting stoma was created in only one patient(2.6%).During a mean follow-up period of 45(range 8-72)months,eight cases(20.5%)of recurrence in five patients required *** interval between operations was 12.1 months(range 6.3-17.8 mo).Four patients(10.3%)experienced recurrence within 1 year postoperatively,and all eight recurrences occurred within 2 years of the initial *** reoperation rates at 1 and 3 years were 10.3%and 20.5%,respectively.A redo ileocolic anastomosis was performed in all recurrent *** multivariate Cox regression analysis,emergency surgery[hazard ratio(HR)9.357,95%confidence interval(CI):1.608-54.453,P=0.013]and elevated C-reactive protein(CRP)levels(HR 1.154,95%CI:1.002–1.328,

关键词： Behcet syndrome Intestinal General surgery Recurrence Risk factors

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Evaluation of SWAT sub-daily runoff estimation at small agricultural watershed in Korea

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Frontiers of Environmental Science & Engineering 2013年第1期7卷 109-119页

作者： Ganga Ram Maharjan Youn Shik Park Nam Won Kim Dong Seok Shin Jae Wan Choi Geun Woo Hyun Ji-Hong Jeon yong sik ok Kyoung Jae Lim GIS Environmental System Laboratory Department of Regional Infrastructure Engineering Kangwon National University Chuncheon 200-701 R. O. Korea Department of Agricultural and Biological Engineering Purdue University West Lafayette IN 47907 USA Water-Resource Research Department Korea Institute of Construction Technology Goyang 411-712 R. O. Korea National Institute of Environmental Research Incheon 404-708 R. 0. Korea Department of Water Research Division Gangwon Institute of Health and Environment Chuncheon 200 822 R. O. Korea Department of Environmental Engineering Andong National University Andong 760-380 R. O. Korea Department of Biological Environ-ment Kangwon National University'Chuncheon 700-711 R. O. Korea

A study was undertaken for the prediction of runoff flow from 0.8 ha field-sized agricultural watershed in South Korea using Soil and Water Assessment Tool (SWAT) sub-daily. The SWAT model with sub-daily configuration predicted flow from the watershed within the range of acceptable accuracy. The SWAT sub-daily simulations were carried out for a total of 18 rainfall events, 9 each for calibration and validation. Overall trend and extent of matching simulated flow for the rainfall events in 2007-2008 with measured data during the calibration process were coefficient of determination ( ) value of 0.88 and Nash and Sutcliffe Efficiency ( ) value of 0.88. For validation, and values were 0.9 and 0.84, respectively. Whereas and values for simulation results using daily rainfall data were 0.79 and -0.01, respectively, that were observed to be out of acceptable limits for the model simulation. The importance of higher time resolution (hourly) precipitation records for flow simulation were evaluated by comparing and with 15 min, 2 h, 6 h and 12 h precipitation data, which resulted in lower statistics with increases in time resolution of precipitation data. The SWAT sub-daily sensitivity analysis was performed with the consideration of hydraulic parameter and was found as in the rank order of CN2 (curve number), ESCO (soil evaporation compensation factor), GW_DELAY (ground water delay time), ALPHA_BF ( base flow alpha factor), GWQMN ( a threshold minimum depth of water in the shallow aquifer required for return flow to occur) , REVAPMN (minimum depth of water in shallow aquifer for re-evaporation to occur) , LAT_TIME (lateral flow travel time) respectively. These sensitive parameters were evaluated at 10% higher and lower values of the parameters, corresponding to 70.5% higher and 23.2% lower in simulated flow out from the SWAT model. From the results obtained in this study, hourly precipitation record for SWAT sub-daily with Green-Ampt infiltration method was prov

关键词： Soil and Water Assessment Tool (SWAT) sub-daily simulation runoff rainfall

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Factors affecting the distribution of microplastics in soils of China

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Frontiers of Environmental Science & Engineering 2023年第9期17卷 157-176页

作者： Yin Liu Matthias CRillig Quan Liu Jingjing Huang Muhammad Amjad Khan Xiaohui Li Qin Liu Qingqing Wang Xuesong Su Linyi Lin Yang Bai Genmao Guo Yi Huang yong sik ok Shan Hu Junfeng Wang Honggang Ni Qing Huang Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province/Center for Eco-Environmental Restoration Engineering of Hainan Province/State Key Laboratory of Marine Resource Utilization in South China Sea/College of Ecology and Environment Hainan UniversityHaikou 570228China Institute of Biology Ecology of PlantsFreie Universität Berlin/Berlin Brandenburg Institute of Advanced Biodiversity Research(BBIB)Berlin 14195Germany Hainan Inspection and Detection Center for Modern Agriculture Haikou 570100China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China China College of Management and Economics Tianjin UniversityTianjin 300072China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Republic of Korea School of Urban Planning and Design Peking University Shenzhen Graduate SchoolShenzhen 518055China

Microplastics(MPs)are found worldwide in high abundance,posing a potential threat to *** the ubiquity of MPs in the environment,very little is known about the regional distribution of MPs and underlying factors affecting this distribution in the field,which likely include human activity,but also features of the environment ***,out of a total of 1157 datapoints investigated in 53 Chinese studies,9.68%datapoints were removed as outliers in the heterogeneity *** review revealed that the abundance of MPs was highly *** addition,microplastic(MP)distribution maps based on China demonstrated that the highest abundance of MPs tended to occur near large rivers and central land affected by the intersection of two *** model-fitting and previous studies showed that MP abundance in China was correlated with longitude,agricultural mulching film usage per capita,temperature,and ***,due to the heterogeneity of MPs and the low matching degree between the current environmental data and the sampling points,this pattern was not as evident as reported in any single *** affecting the distribution of MPs can not be captured by linear relationships alone,and systematic selection of suitable environmental factors and further model optimization are needed to explore the cause of MP pollution in ***,this review revealed an uneven distribution of MPs and serves as a reference for model prediction to assess and control plastic pollution in natural soil environments.

关键词： Microplastic distribution Microplastic heterogeneity Effecting factors Agriculture Socio-economic factors

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Response of microbial communities to biochar-amended soils:a critical review

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Biochar 2019年第1期1卷 3-22页

作者： Kumuduni Niroshika Palansooriya James Tsz Fung Wong Yohey Hashimoto Longbin Huang Jörg Rinklebe Scott X.Chang Nanthi Bolan Hailong Wang yong sik ok Korea Biochar Research Center O-Jeong Eco-Resilience Institute(OJERI)Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Republic of Korea Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong Kong SARChina Department of Bioapplications and Systems Engineering Tokyo University of Agriculture and TechnologyTokyoJapan Environment Centres Sustainable Minerals InstituteThe University of QueenslandBrisbaneQLD 4072Australia Laboratory of Soil-and Groundwater-Management School of Architecture and Civil EngineeringInstitute of Foundation Engineering and Water and-Waste ManagementUniversity of WuppertalPauluskirchstraße 742285 WuppertalGermany Department of Environment Energy and GeoinformaticsSejong UniversitySeoul 05006Republic of Korea Department of Renewable Resources University of AlbertaEdmontonAB T6G 2E3Canada Global Centre for Environmental Remediation University of NewcastleCallaghanNSW 2308Australia School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000GuangdongChina Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province Zhejiang A&F University

Application of biochar to soils changes soil physicochemical properties and stimulates the activities of soil microorganisms that influence soil quality and plant *** the response of soil microbial communities to biochar amendments is important for better understanding interactions of biochar with soil,as well as ***,the effect of biochar on soil microorganisms has received less attention than its influences on soil physicochemical *** this review,the following key questions are discussed:(i)how does biochar affect soil microbial activities,in particular soil carbon(C)mineralization,nutrient cycling,and enzyme activities?(ii)how do microorganisms respond to biochar amendment in contaminated soils?and(iii)what is the role of biochar as a growth promoter for soil microorganisms?Many studies have demonstrated that biochar-soil application enhances the soil microbial biomass with substantial changes in microbial community *** amendment changes microbial habitats,directly or indirectly affects microbial metabolic activities,and modifies the soil microbial community in terms of their diversity and ***,chemical properties of biochar,(especially pH and nutrient content),and physical properties such as pore size,pore volume,and specific surface area play significant roles in determining the efficacy of biochar on microbial performance as biochar provides suitable habitats for *** mode of action of biochar leading to stimulation of microbial activities is complex and is influenced by the nature of biochar as well as soil conditions.

关键词： Carbon cycling Microbial habitat Microorganisms Nutrient cycling Enzyme activity

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