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Effects of biochar-amended alkali-activated slag on the stabilization of coral sand in coastal areas

Journal of Rock Mechanics and Geotechnical Engineering 2023年第3期15卷 760-772页

作者： Xiaole Han Ningjun Jiang Fei Jin Krishna RReddy Yijie Wang Kaiwei Liu Yanjun Du Department of Civil and Environmental Engineering University of Hawaii at ManoaHonoluluUSA Institute of Geotechnical Engineering Southeast UniversityNanjing210096China School of Engineering Cardiff UniversityCardiffUK Department of Civil Materialsand Environmental EngineeringUniversity of Illinois at ChicagoChicagoUSA College of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei230601China

Coral sand is widely encountered in coastal areas of tropical and subtropical *** with silica sand,it usually exhibits weaker performance from the perspective of engineering *** improve the geomechanical performance of coral sand and meet the requirement of foundation construction in coastal areas,a novel alkali activation-based sustainable binder was *** alkaliactivated slag(AAS)binder material was composed of ground granulated blast-furnace slag(GGBS)and hydrated lime with the amendment of biochar,an agricultural waste-derived *** biocharamended AAS stabilized coral sand was subjected to a series of laboratory tests to determine its mechanical,physicochemical,and microstructural *** show that adding a moderate amount of biochar in AAS could improve soil strength,elastic modulus,and water holding capacity by up to 20%,70%,and 30%,***,the addition of biochar in AAS had a marginal effect on the sulfate resistance of the stabilized sand,especially at high biochar ***,the resistance of the AAS stabilized sand to wet-dry cycles slightly deteriorated with the addition of *** on these observations,a conceptual model showing biochar-AAS-sand interactions was proposed,in which biochar served as an internal curing agent,micro-reinforcer,and mechanically weak point.

关键词： Coral sand Soil stabilization biochar Alkali activation

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Effect of biochar on grain yield and leaf photosynthetic physiology of soybean cultivars with different phosphorus efficiencies

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Journal of Integrative Agriculture 2019年第10期18卷 2242-2254页

作者： ZHU Qian KONG Ling-jian SHAN Yu-zi YAO Xing-dong ZHANG Hui-jun XIE Fu-ti AO Xue Soybean Research Institute Agronomy College Shenyang Agricultural University

This study was conducted with two soybean cultivars, Liaodou 13 (L13, phosphorus (P)-efficient) and Tiefeng 3 (T3, P-inefficient), to investigate the effects of biochar on soybean yield and photosynthetic physiological parameters, at four biochar application rates (0, 1, 5, and 10%, w/w), and two fertilization treatments (0 and 150 kg ha–1). Grain yield, plant biomass, P accumulation, leaf net photosynthetic rate (Pn), chlorophyll index (Chl), nitrogen balance index (NBI), sucrose phosphate synthase (SPS), and sucrose synthase (SS) activities, soluble sugar, sucrose and starch contents, and leaf area duration (LAD) were measured. biochar had positive effects on Pn, Chl, NBI, SPS, and SS activities, and leaf soluble sugar, sucrose, and starch contents of both genotypes, these effects increased with biochar application rate. L13 benefited more efficiently from biochar than T3 did, as the grain yield of L13 significantly increased by 31.0 and 51.0%, at 5 and 10% biochar, respectively, while that of T3 increased by 40.4 at 10% biochar application rate, as compared with controls. The combined application of biochar and fertilizer boosted the positive effects described, but no difference was found for grain yield in L13 among biochar application rates, while grain yield of T3 continually increased with biochar rate, among which, 1% biochar combined with 150 kg ha–1 fertilizer resulted in T3 yield increment of more than 23%, compared with the application of 150 kg ha–1 fertilizer alone. Altogether, our results indicated that the application of biochar enhanced carbon assimilation in soybean, resulting in increased biomass accumulation and yield. Differences in genotypic responses to biochar highlight the need to consider specific cultivars and biochar rate, when evaluating the potential responses of crops to biochar.

关键词： biochar P efficiency photosynthesis soybean yield

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Integrating biochar and bacteria for sustainable remediation of metal-contaminated soils

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biochar 2023年第1期5卷 1098-1116页

作者： Peng Ouyang Mathiyazhagan Narayanan Xiaojun Shi Xinping Chen Zhenlun Li Yongming Luo Ying Ma College of Resources and Environment Southwest UniversityChongqing 400716China Division of Research and Innovation Department of BiotechnologySaveetha School of EngineeringSaveetha Institute of Medical and Technical ScienceChennai 602105Tamil NaduIndia Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Due to anthropogenic activities,heavy metal(HM)pollution in soils has increased,resulting in severe ecological problems and posing a constant threat to human *** various remediation methods,bacterial remediation is a relatively clean,efficient,and minimally negative ***,bacterial agents face multiple environmental stresses,making them challenging to achieve long-lasting and stable restoration *** address this issue,supportive organic substances such as biochar can be added to the soil with *** to bibliometric studies,integrating biochar and bacteria is extensively researched and widely used for HM-contaminated soil *** integrating biochar and bacteria,heavy metals in the soil can be remediated,and soil conditions can be improved over *** can also better promote plant growth or contribute effectively to phytoremediation processes when assisted by ***,the remediation agents integrating biochar and bacteria are still some distance away from large-scale use because of their high cost and possible environmental ***,further discussion on the interaction between biochar and bacteria and the integration approach,along with their remediation efficiency and environmental friendliness,is needed to achieve sustainable remediation of HM-contaminated soils by integrating biochar and *** paper discusses the potential mechanisms of biochar-bacteria-metal interactions,current advancements in biochar-bacteria combinations for HM-contaminated soil treatment,and their application in sustainable remediation,analyzes the interaction between biochar and bacteria and compares the remediation effect of different ways and feedstocks to integrate biochar and ***,future directions of biochar-bacteria combinations are presented,along with evidence and strategies for improving their commercialization and implementation.

关键词： biochar Heavy metals Bioremediation Plant-beneficial bacteria Soil pollution

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Effects on soil quality of biochar and straw amendment in conjunction with chemical fertilizers

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Journal of Integrative Agriculture 2017年第3期16卷 704-712页

作者： HE Li-li ZHONG Zhe-ke YANG Hui-min Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province/China National Bamboo Research Center Hangzhou 310012 P.R.China Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P.R. China University of Chinese Academy of Sciences Beijing 100049 P.R.China

The objective of this study was to evaluate the effects on chemical and microbiological properties of paddy soil of short-term biochar,straw,and chemical fertilizers compared with chemical fertilization *** soil fertilization treatments were evaluated：regular chemical fertilizers（RF）,straw＋regular chemical fertilizers（SRF）,straw biochar＋regular chemical fertilizers（SCRF）,bamboo biochar（BC）＋regular chemical fertilizers（BCRF）,and straw biochar＋70%regular chemical fertilizers（SC＋70%RF）.Their effects were investigated after approximately 1.5 *** soil p H and cation exchange capacity（CEC）were significantly higher in biochar-treated *** soil phosphorous（P）and potassium（K）contents increased with biochar *** soil Colwell P content was significantly increased with the addition of straw biochar in the treatments of SCRF and SC＋70%*** oxygen（O）：carbon（C）ratio doubled in BC picked from the *** indicated that BC underwent a significant oxidation process in the *** denaturing gradient gel electrophoresis（DGGE）fingerprints of microbial communities differed among the *** with added biochar had higher Shannon diversity and species richness indices than soils without *** results suggest that biochar can improve soil fertility.

关键词： biochar straw amendment fertilizer nutrient soil bacteria denaturing gradient gel electrophoresis

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Steam explosion of crop straws improves the characteristics of biochar as a soil amendment

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Journal of Integrative Agriculture 2019年第7期18卷 1486-1495页

作者： CHEN Xue-jiao LIN Qi-mei Muhammad Rizwan ZHAO Xiao-rong LI Gui-tong College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193P.R.China Key Laboratory of Arable Land Conservation (North China) Ministry of Agriculture/Key Laboratory of Plant-Soil InteractionsMinistry of EducationBeijing 100193P.R.China

Five crop straws (wheat, rice, maize, oil-rape, and cotton) were first steam-exploded for 2 min at 210℃, 2.5 MPa and then pyrolyzed at 500℃ for 2 h. Steam explosion (SE) induced 47–95% and 5–16% reduction of hemicellulose and cellulose, respectively, in the crop straws. The biochars derived from SE-treated feedstocks had a lower specific surface area (SSA) and pore volume, compared to those from pristine feedstocks, with one exception that SE enhanced SSA of oil-rape straw biochar by approximately 16 times. After SE, biochars had significant higher anion exchange capacity (AEC) (6.88–11.44 cmol kg–1) and point of zero net charges (PZNC) (pH 3.61–5.32) values. It can thus be speculated that these biochars may have higher potential for anions adsorption. In addition, oil-rape straw might be suitable to SE pretreatment for preparing biochar as a soil amendment and sorbent as well. Further work is required for testing its application in soil.

关键词： crop straws steam explosion biochar characterization

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The Role of biochar to Enhance Anaerobic Digestion: A Review

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Journal of Renewable Materials 2020年第9期8卷 1033-1052页

作者： Shuai Tang Zixin Wang Zhidan Liu Yuanhui Zhang Buchun Si Laboratory of Environment-Enhancing Energy(E2E) Key Laboratory of Agricultural Engineering in Structure and EnvironmentMinistry of AgricultureCollege of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing100083China Department of Agricultural and Biological Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

biochar,one of the products of thermochemical conversion of biomass,possesses specific physiochemical properties such as conductivity,pore adsorption,surface functional groups,and cation exchange *** digestion(AD)as a classical bio-wastes conversion technology,suffers from inhibitions,process instability,and methanogenic inefficiency which limit its *** the advantages of pH buffering,functional microbes enrichment,inhibitors alleviating,and direct interspecies electron transfer(DIET)accelerating,biochar suggests a promising application as additives for ***,this paper reviewed the noting physicochemical properties of biochar,and discussed its roles and related mechanisms in ***,this paper highlighted the advantages and drawbacks,and pointed out the corresponding challenges and prospects for future research and application of biochar amending AD.

关键词： biochar physiochemical properties anaerobic digestion methane production mechanisms

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Synergy effect between tetracycline and Cr(Ⅵ)on combined pollution systems driving biochar-templated Fe_(3)O_(4)@SiO_(2)/TiO_(2)/g-C_(3)N_(4) composites for enhanced removal of pollutants

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biochar 2023年第1期5卷 1-20页

作者： Bowen Yang Jiawei Dai Yuan Zhao Zhanchao Wang Jingwei Wu Caiya Ji Yuhu Zhang Xiao Pu College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China School of Chemistry and Chemical Engineering Guangxi UniversityGuangxi 530004China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China Environmental Technology Engineering Co.Ltd Subsidiary of Chinese Research Academy of Environmental Sciences Beijing 100012China

biochar-coupled Fe_(3)O_(4)@SiO_(2)/TiO_(2)/g-C_(3)N_(4) composites were successfully constructed through simple sol-gel and calcination *** composites efficiently removed high-concentration toxic tetracycline(TC)by means of·OH and·O_(2)^(−),whose removal rate exhibited 91.88%during 3 h,and the degradation rate constant reached up to 0.0068 min^(−1).The excellent performance can be attributed to the high specific surface area,enhanced visible light response,the introduction of magnetic nanoparticles and biochars expediting charge transfer,Z-scheme heterojunction enhancing the spatial separation of photo-generate carriers and,importantly extraordinary adsorption capacity of 147.96 mg g^(−1).Moreover,the composites showed the most excellent efficiency under the calcination temperature of 450℃,and exhibited good stability with tolerance to a wide range of pH and ***,a synergistic photocatalytic effect was discovered in the TC/Cr(Ⅵ)combined pollution systems,resulting in significantly improved removal of Cr(Ⅵ).Besides,the photocatalytic mechanism and degradation path of tetracycline were also *** these findings suggested the as-synthesized catalyst was an excellent photocatalyst for removal of TC/Cr(Ⅵ)-contaminated water.

关键词： biochar Tetracycline Hexavalent chromium Combined pollution Synergistic photocatalytic effect

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Insights into the mechanisms underlying the biodegradation of phenanthrene in biochar-amended soil:from bioavailability to soil microbial communities

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biochar 2023年第1期5卷 273-289页

作者： Meng Zhang Yaqi Luo Yitao Zhu Haiyun Zhang Xilong Wang Wei Li Pingping Li Jiangang Han Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province Hongze 223100China Agricultural Environment and Farmland Conservation Experiment Station of Ministry Agriculture Shanghai Academy of Agricultural SciencesShanghai 201403China Laboratory for Earth Surface Processes College of Urban and Environmental SciencesPeking UniversityBeijing 100871China

The dynamic effect of biochar amendment in contaminated soil on the bioavailability of polycyclic aromatic hydrocarbons(PAHs)and microbial communities and how it comprehensively affects PAH biodegradation remain *** study investigated the effects of wheat straw-derived biochars obtained at 300 and 500℃ at different amendment levels(0.03%and 0.3%)on the mineralization kinetics of phenanthrene with different initial concentrations(2 and 20 mg kg^(−1))in soil by indigenous *** results revealed that the addition of biochar inhibited both the rates and extents of mineralization in low-concentration phenanthrene-contaminated soil(PLS)by 38.9-78.3%and 23.9-53.6%,*** was because biochar amendment in the PLS greatly reduced the bioavailable fraction of phenanthrene for degradation owing to its strong sorption and also decreased that to specific degrading bacterial genera,which hindered their growth and reduced their abundances by 1.37-36.6%.However,biochar addition into the soil contaminated with high concentrations of phenanthrene(PHS)resulted in its effective mineralization and enhanced mineralization rates and extents at high amendment levels by 32.4-86.7%and 32.0-44.7%,*** was because biochar amendment in the PHS significantly promoted the abundances of the total bacterial communities(29.9-80.4%)and potential degrading genera(1.89-25.9%)by providing nutrients and stimulated the specific PAH-degradative nidA gene abundance by 1-2 *** findings will guide the use of biochar to remediate soils with different PAH pollution levels based on the two roles that they play(i.e.,immobilizing PAHs or facilitating PAH degradation).

关键词： biochar PAHs Microbial availability Soil microbial communities Mineralization

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In-situ construction of Co(OH)_(2) nanoparticles decorated biochar for highly efficient degradation of tetracycline hydrochloride via peracetic acid activation

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Chinese Chemical Letters 2023年第9期34卷 264-269页

作者： Fengbin Sun Xudong Yang Feng Shao Fan Li Zhicheng Pan Lin Qiao Ziniu Xiao Wen Liu Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China College of Landscape Architecture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province Haitian Water GroupChengdu 610299China

Peracetic acid(CH_(3)C(O)OOH,PAA)-based heterogeneous advanced oxidation process(AOP)has attacked intensive interests due to production of various reactive ***,Co(OH)_(2)nanoparticles decorated biochar(Co(OH)_(2)/BC)was fabricated by a simple and controllable method,which was used to degrade tetracycline hydrochloride(TTCH)in water through PAA *** results indicated that 100%TTCH(C_(0)=10μmol/L)degradation efficiency was realized within 7 min at pH 7,with a high kinetic rate constant(k_(1))of 0.64 min^(-1)by the optimized Co(OH)_(2)/*** characterizations suggested that Co(OH)_(2)nanoparticle was successfully decorated on biochar,leading to more active sites and electronic structure alteration of biochar,thus greatly promoting the catalytic cleavage of PAA for radicals ***,the reactive oxygen species(ROS)quenching experiments and electron paramagnetic resonance(EPR)analysis demonstrated the key species were alkoxyl radicals(R–O^(·),mainly CH_(3)CO_(2)^(·)and CH_(3)CO_(3)^(·)),HO^(·)and^(1)O_(2)in this ***,density functional theory(DFT)calculation on Fukui index further revealed that the vulnerable sites of TTCH and three possible degradation pathways were *** study can provide a new strategy for synthesis functional materials in PAA activation AOPs for removal of antibiotics in water.

关键词： biochar Peracetic acid(PAA) Tetracycline hydrochloride Intermediates DFT calculation

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Benefits and limitations of biochar for climate-smart agriculture:a review and case study from China

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biochar 2023年第1期5卷 1319-1342页

作者： Xiaomeng Bo Zhiwei Zhang Jinyang Wang Shumin Guo Zhutao Li Haiyan Lin Yawen Huang Zhaoqiang Han Yakov Kuzyakov Jianwen Zou Key Laboratory of Green and Low-Carbon Agriculture in Southeastern China Ministry of Agriculture and Rural AffairsCollege of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationNanjing 210095China Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil ScienceUniversity of Gottingen37077 GottingenGermany Peoples Friendship University of Russia(RUDN University) 117198 MoscowRussia Institute of Environmental Sciences Kazan Federal University420049 KazanRussia

biochar has gained significant attention in agricultural and environmental research over the last two *** comprehensive review evaluates the effects of biochar on soil organic carbon(SOC),emission of non-CO_(2) greenhouse gases,and crop yield,including related mechanisms and major influencing *** impacts of biochar on SOC,methane and nitrous oxide emissions,and crop yield are controlled by biochar and soil properties and management ***-temperature biochar produced from lignin-rich feedstocks may decrease methane and nitrous oxide emissions in acidic soils and strengthen long-term carbon sequestration due to its stable aromatic *** contrast,low-temperature biochar from manure may increase crop yield in low-fertility *** biochar to farmlands in China can increase SOC content by 1.9 Pg C and reduce methane and nitrous oxide emissions by 25 and 20 Mt CO_(2)-eq year^(−1),respectively,while increasing crop yields by 19%.Despite the increasing evidence of the positive effects of biochar,future research needs to explore the potential factors that could weaken or hinder its capacity to address climate change and secure crop *** conclude that biochar is not a universal solution for global cropland;however,targeted applications in fields,landscapes,or regional scales,especially in low fertility and sandy soils,could realize the benefits of biochar as a climate-smart measure.

关键词： biochar Carbon sequestration Greenhouse gas Food security Mitigation potential

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