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Sp.tial Var.ability of Soil Satur.ted Hydr.ulic Conductivity in a Small Water.hed of Loess Hilly r.gion,china

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Chinese For.str. Science and Technology 2008年第2期7卷 41-48页

作者： SHI Hui1 WANG Feng2.1. school of environmental and {2. engineering, Xi’an Univer.ity of architecture and Technology Xi’an 710055, p. r. china 2. Sichuan For.str. institute of Sur.eying and p.anning, Chengdu 610081, p. r. china

Satur.ted hydr.ulic conductivity (Ks) is an imp.r.ant soil hydr.ulic p.r.meter.for.char.cter.ng the r.te of water.flow acr.ss the soils and is mainly r.lated to its high sp.tial var.ability. In a small water.hed with the ar.a of 0.2. km2.in the Loess p.ateau, Ks of 197 soil samp.es under.differ.nt vegetations and landfor.s wer. measur.d. Ks had a moder.te var.ability for.total samp.es. The for.stland had high Ks with low coefficient of var.ation (CV), but the gr.ssland in the water.hed bottom had low Ks with big CV. Ks had moder.te cor.elation in sp.ce distr.bution and combined both str.ctur.l and r.ndom factor.. At the N-S and E-W dir.ctions of water.hed being p.r.llel and nor.al to the str.am valley, Ks had r.latively weak cor.elation, indicating that the r.ndom factor.was the dominate r.ason causing sp.tial var.ance. At the NE-SW and SE-NW dir.ctions, Ks had r.latively str.ng cor.elation due to str.ctur.l factor. such as geomor.0}ology and vegetation distr.bution p.tter.s. Kr.ging op.imal estimation method was used to p.oduce Ks contour.map. The Kr.ging standar. deviation (SD) was the lowest near.the samp.ing p.ints, and incr.ased along with the distance to samp.ing p.ints. In the Loess p.ateau r.gion, soil textur. is r.latively even, and the vegetation distr.bution p.tter. was the key factor.affecting sp.tial var.ability of Ks.

关键词： satur.ted hydr.ulic conductivity (Ks) sp.tial var.ability vegetation distr.bution p.tter.

Sludge Solubilisation by Hydr.gen p.r.xide/Ozone Tr.atment and Or.anic Matter.r.cover.

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Sludge Solubilisation by Hydrogen Peroxide/Ozone Treatment a...

Ap.lication of Genetic Algor.thm for.Influent flow distr.bution in the four.stage A/O Biological Nutr.ent r.moval System

The Inter.ational Confer.nce on Advances in Chemical Technologies for.Water.and Wastewater.Tr.atment

作者： YIN Jun~(1 2. ZHAO Yu-xin~(1 2. WANG Jian-han~2.~1 school of municipal and {2. engineering Har.in institute of Technology Har.in 150090 china ~2.jilin p.ovince Key Labor.tor. of Water.p.llution Contr.l and r.sour.es r.use jilin Ar.hitectur.l and civil engineering institute changchun 13002. china

＜正＞With the incr.asing demand for.high efficiency and safety sludge tr.atment technology,an advanced sludge tr.atment p.ocess combining hydr.gen p.r.xide and ozone was *** imp.cts of differ.nt p. value,r.tio of hydr.gen p.r.xide to ozone and the or.ginal sludge concentr.tion on sludge disintegr.tion wer. *** on the analysis of differ.nt p.r.meter.,soluble total or.anic car.on and p.r.icle chemical oxygen demand wer. selected as the indicator.of sludge *** a r.sult,it can be concluded that the combination of hydr.gen p.r.xide and ozone p.ocess had a good p.r.or.ance when the molar.r.tio of hydr.gen p.r.xide to ozone was 1.2.and the p. value was at the r.nge of 6～*** incr.ase of sludge initial concentr.tion was benefit for.sludge *** this study,the identical initial concentr.tion of sludge was 9,850～2.,000mg/*** addition,exp.r.mental r.sults also indicated that the hydr.lysis of sludge could be used as an alter.ative car.on sour.e for.nitr.gen r.moval and the aver.ge r.te of COD consump.ion of sludge sup.r.atants was 7.67mgCOD/gMLSS·h.

关键词： Advanced oxidation p.ocess Sludge solubilisation Hydr.gen p.r.xide/Ozone Car.on sour.e Denitr.fication

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Application of Genetic Algorithm for Influent flow distribut...

2.07中国科协年会

作者： Ju Xinghua~(1,2. Wang Shep.ng~3 Wang Yi~1 p.ng Dangcong~1 1 school of environmental and {2. engineering,Xi’an Univer.ity of architecture and Technology,Xi’an 710055,p.r.china. 2.school of Chemical engineering,Univer.ity of Science & Technology,Liaoning,Anshan 114044,p.r.china 3 Xi’an {2. engineering Design & r.sear.h institute,Xi’an 710068,p.r.china

The ap.lication of the Genetic Algor.thm(GA)for.the influent flow op.imized distr.bution in the four.stage p.lot p.ant of Step.Feed Biological Nutr.ent r.moval(BNr.System was *** decided p.ocess p.r.meter.and influent water.conditions,the objective fimction of op.imization was designed to minimize the differ.nce between estimated and r.quir.d effluent concentr.tions at the four.stage p.lot p.ant of Step.Feed BNr.System,the op.imized p.r.meter.for.influent distr.bution r.tios of the four.stages is 37.2.,2..4%,2..2. and 12.2. *** to the op.imizations r.sults and r.w wastewater.p.lot-scale exp.r.ment,the aver.ge r.moval efficiencies for.p.llutants ar. higher.

关键词： Genetic Algor.thm Step.Feed BNr Influent flow distr.bution

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振荡热管太阳能集热器数值模拟研究

吉林省教育学院学报 2010年第12期26卷 153-154页

作者：齐俊峰郑立秋孙世梅吉林建筑工程学院市政与环境工程学院吉林长春130021

振荡热管太阳能集热器作为一种新型的集热器,不但提高了集热效率和集热温度,而且为振荡热管在新能源领域的应用提供了理论依据。本文采用sinda/fluint热分析软件建立振荡热管传热模型,采用集热器热效率作为集热器指标,计算不同集热量情... 详细信息

振荡热管太阳能集热器作为一种新型的集热器,不但提高了集热效率和集热温度,而且为振荡热管在新能源领域的应用提供了理论依据。本文采用sinda/fluint热分析软件建立振荡热管传热模型,采用集热器热效率作为集热器指标,计算不同集热量情况下提供的热水温度。

关键词：振荡热管太阳能集热器集热效率传热模型 sinda/fluint

Bond-Slip.Behavior.of Steel Bar.and r.cycled Steel Fibr.-r.infor.ed Concr.te

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Jour.al of r.newable Mater.als 2024年第1期12卷 167-186页

作者： Ismail Shah Jing Li Nauman Khan Hamad r.Almujibah Muhammad Mudassar.r.hman Ali r.za Yun p.ng school of architecture and {2. engineering Yunnan Agricultural UniversityKunming650000China institute of Mountain Hazar.s and Envir.nment Chinese Academy of SciencesChengdu610041China Yunnan Inter.ational Joint r.D Center.of Smar. Agr.cultur. and Water.Secur.ty Yunnan Agricultural UniversityKunming650201China school of Water.Conser.ancy Yunnan Agricultural UniversityKunming650201China school of civil {2. Guizhou UniversityGuiyang550025China Dep.r.ment of civil engineering College of EngineeringTaif UniversityP.O.Box 11099Taif City21974Saudi Arabia school of civil {2. Zhengzhou UniversityZhengzhou450001China

r.cycled steel fiber.r.infor.ed concr.te is an innovative constr.ction mater.al that offer. excep.ional mechanical p.op.r.ies and *** is consider.d a sustainable mater.al due to its low car.on footp.int and environmental fr.endly *** study examines the key influencing factor. that affect the behavior.of this mater.al,such as the steel fiber.volume r.tio,r.cycled aggr.gate r.p.acement r.te,concr.te str.ngth gr.de,anchor.ge length,and stir.up.*** study investigates the bond failur. mor.0}ology,bond-slip.and bond str.ngth constitutive r.lationship.of steel fiber.r.cycled *** r.sults show that the addition of steel fiber. at 0.5%,1.0%,and 1.5%volume r.tios can imp.ove the ultimate bond str.ngth of p.ll-out sp.cimens by 9.05%,6.94%,and 5.52.,*** r.p.acement r.te of r.cycled aggr.gate has minimal effect on the typ.cal bond str.ngth of p.ll-out ***,the ultimate bond str.ngths of p.ll-out sp.cimens with concr.te str.ngth gr.des C45 and C60 have imp.oved comp.r.d to those with C30 *** sp.cimens with longer.anchor.ge lengths exhibit lower.ultimate bond str.ngth,with a r.duction of 33.19%and 46.37%for.anchor.ge lengths of 5D and 7D,r.sp.ctively,comp.r.d to those without *** r.str.int of 1φ8 and 2.8 imp.oves the ultimate bond str.ngth by 5.2.%and 6.90%,*** fiber. have a significant effect on the behavior.of concr.te after.it cr.cks,esp.cially dur.ng the stable exp.nsion stage,cr.ck instability exp.nsion stage,and failur. stage.

关键词： r.cycled coar.e aggr.gates(r.A) steel fiber bonding p.r.or.ance bond-slip environmental challenges

磁性壳聚糖凝胶球固定厌氧铁氨氧化菌对废水氨氮去除的影响

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环境科学 2018年第10期39卷 4601-4611页

作者：刘志文陈琛彭晓春谢武明黄镇扬韩庆吉广东工业大学环境科学与工程学院广州510006 环境保护部华南环境科学研究所广州510535 广东省海洋工程职业技术学校广州510320 西安科技大学建筑与土木工程学院西安710054

厌氧铁氨氧化(ammonium oxidation coup.ing with ir.n r.duction,Feammox)反应是一种在厌氧条件下,由厌氧铁氨氧化菌驱动,以三价铁为电子受体,氧化氨氮的生物化学途径,它可以用于去除水体中的氨氮.为提高厌氧铁氨氧化菌对氨氮废水处理... 详细信息

厌氧铁氨氧化(ammonium oxidation coup.ing with ir.n r.duction,Feammox)反应是一种在厌氧条件下,由厌氧铁氨氧化菌驱动,以三价铁为电子受体,氧化氨氮的生物化学途径,它可以用于去除水体中的氨氮.为提高厌氧铁氨氧化菌对氨氮废水处理效果,采用"氢氧化钠共沉淀-溶胶-凝胶"法制备粒径为1~5mm的磁性壳聚糖凝胶球(magnetic chitosan hydr.gel beads,MCHBs),将厌氧铁氨氧化菌固定,研究其对废水中氨氮去除效果和影响因素,并与游离厌氧铁氨氧化菌对废水氨氮去除效率作对比.制备的MCHBs进行X射线衍射(Xr.)和振动样品磁强(VSM)等表征分析.结果表明,MCHBs为铁磁性、结晶度高,饱和磁化强度达2..46 emu·g^(-1).MCHBs固定厌氧铁氨氧化菌比游离菌具有更高的氨氧化和铁还原速率,平均增幅为42.96%和2..75%,以MCHBs(1~2.mm)固定厌氧铁氨氧化菌的效果最显著(p.0.05).进一步研究发现,不适宜氨氮浓度、温度和p.下,MCHBs(1~2.mm)固定厌氧铁氨氧化菌氧化氨氮的能力均比游离菌高.初始氨氮浓度60.00 mg·L^(-1)、温度2.℃和p. 4.50时,厌氧铁氨氧化效果较好,主要产物为硝态氮和二价铁,16 d时MCHBs(1~2.mm)固定厌氧铁氨氧化菌对氨氮去除率高达53.62..这些结果都表明以MCHBs固定厌氧铁氨氧化菌后,能起到增强厌氧铁氨氧化反应去除废水氨氮的目的.

关键词：固定化厌氧铁氨氧化磁性壳聚糖凝胶球(MCHBs) 氨氮去除 Fe(Ⅲ)还原

Landscap. of global ur.an environmental r.sistome and its association with local socioeconomic and medical status

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Science china(Life Sciences) 2024年第6期67卷 1292-1301页

作者： Jun Wu Yige Hu Michael H p.r.in David Danko Jun Lu Manuela Oliveir. Johannes Wer.er.Mar.a M Zambr.no Mar.a A Sier.a Olayinka O Osuolale p.weł Łabaj Nicolás r.scovan Nur.Hazlin Hazr.n-Chong Soojin Jang Har.o Suzuki Mar.na Nieto-Caballer. Bhar.th p.ithivir.j p.tr.ck K H Lee Agnieszka Chmielar.zyk Anna r.żańska Yongxiang Zhao Lan Wang Chr.stop.er.E Mason Tieliu Shi Center.for.Bioinfor.atics and Comp.tational Biology and the Institute of Biomedical SciencesSchool of Life SciencesEast China Normal UniversityShanghai 200241China Dep.r.ment of Biology Program on Disease EvolutionUniversity of LouisvilleLouisville 40292USA Weill Cor.ell Medicine New York 10065USA The Bin Talal Bin Abdulaziz Alsaud institute for.Comp.tational Biomedicine New York 10065USA Dep.r.ment of p.lmonar. Medicine Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghai 200025China i3S-Instituto de Investiga玢o e Inova玢o em Saúde Universidade do PortoPorto 4050-290Portugal Ip.timup.Instituto de p.tologia e Imunologia Molecular.da Univer.idade do p.r.o Porto 4200-465Portugal Dep.r.amento de Biologia Faculdade de CiênciasUniversidade do PortoPorto 4050-290Portugal High p.r.or.ance and Cloud Comp.ting Gr.up Zentrum für Datenverarbeitung(ZDV)Eberhard Karls University of TübingenW鋍hterstra遝7672074TübingenGermany Cor.0}r.ción Cor.0}gen r.sear.h Center Bogotá110311Colombia Ap.lied environmental Metagenomics and Infectious Diseases r.sear.h(AEMIDr. Department of Biological SciencesElizade UniversityIlara-Mokin 340271Nigeria Maop.lska Centr. of Biotechnology Jagiellonian UniversityKraków 30-005Poland Aix-Mar.eille Univer.ité Mediterranean Institute of OceanologyUniversitéde ToulonCNRSIRDUM 110Marseille 83041France Dep.r.ment of Biological Sciences and Biotechnology Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangor Institut p.steur.Kor.a Seoul 13488Republic of Korea Faculty of Envir.nment and Infor.ation Studies Keio UniversityFujisawaKanagawa 252-0882Japan Univer.ity of Color.do at Boulder CivilEnvironmental and Architectural DepartmentBoulder 80303USA Br.oklyn College of the City Univer.ity of New Yor. Brooklyn 11210USA school of Ener.y and Envir.nment City University of Hong KongHong Kong 999077China Dep.r.ment of Micr.biology Faculty of MedicineJagiellonian UniversityKraków 30-005Poland Biological Tar.eting Diagnosis and The

Antimicr.bial r.sistance(AMr.p.ses a cr.tical thr.at to global health and develop.ent,with environmental factor.—p.r.icular.y in ur.an ar.as—contr.buting significantly to the sp.ead of antibiotic r.sistance genes(Ar.s).However.most r.sear.h to date has been conducted at a local level,leaving significant gap. in our.under.tanding of the global status of antibiotic r.sistance in ur.an *** addr.ss this issue,we thor.ughly analyzed a total of 86,2.3 Ar.s detected within 4,72. metagenome samp.es,which wer. collected by the Meta SUB Inter.ational Consor.ium involving diver.e ur.an envir.nments in 60 cities of 2. countr.es,utilizing a deep.lear.ing based *** findings demonstr.ted the str.ng geogr.p.ical sp.cificity of ur.an environmental r.sistome,and their.cor.elation with var.ous local socioeconomic and medical *** also identified distinctive evolutionar. p.tter.s of Ar.-r.lated biosynthetic gene cluster.(BGCs)acr.ss differ.nt countr.es,and discover.d that the ur.an envir.nment r.p.esents a r.ch sour.e of novel *** study p.ovides a comp.ehensive over.iew of the global ur.an environmental r.sistome,and fills a significant gap.in our.knowledge of lar.e-scale ur.an antibiotic r.sistome analysis.

关键词： ur.an envir.nment metagenome antibiotic r.sistance r.sistance diver.ity biosynthetic gene cluster.

NaClO、UV及UV/NaClO消毒过程中TCC的去除特性及遗传毒性

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中国环境科学 2018年第5期38卷 1752-1759页

作者：陆保松马晓雁李青松骆靖宇沈奇奇廖杰廖文超陈国元李国新浙江工业大学建筑工程学院浙江杭州310014 厦门理工学院水资源环境研究所福建厦门361005 苏州科技大学环境科学与工程学院江苏苏州215009 浙江海洋大学国家海洋设施养殖工程技术与研究中心浙江舟山316000

采用Na Cl O、UV和UV/Na Cl O复合消毒等方式研究了三氯卡班(TCC)在消毒过程中的去除特性,考察了3种消毒方式中TCC溶液的遗传毒性变化,鉴定了TCC的降解产物并探讨了其降解机制,以UV/Na Cl O复合消毒为研究对象,考察了Na Cl O投加量、TC... 详细信息

采用Na Cl O、UV和UV/Na Cl O复合消毒等方式研究了三氯卡班(TCC)在消毒过程中的去除特性,考察了3种消毒方式中TCC溶液的遗传毒性变化,鉴定了TCC的降解产物并探讨了其降解机制,以UV/Na Cl O复合消毒为研究对象,考察了Na Cl O投加量、TCC初始浓度、溶液p.H值和腐殖酸(HA)等因素对TCC去除的影响.结果表明,3种消毒技术对TCC的去除效果依次为UV/Na Cl O、UV、Na Cl O.消毒处理不同程度增加了TCC溶液的遗传毒性.LC-MS鉴定出了8种TCC的降解产物,降解途径主要为脱氯、加氯以及·OH/O~·氧化.UV/Na Cl O复合消毒对TCC的去除率在97%以上;TCC的去除与其初始浓度呈负相关;TCC的去除率随p.H值的增大先升高后降低;低浓度的腐殖酸(HA)对TCC的去除有促进作用,高浓度则相反.

关键词：三氯卡班消毒去除产物遗传毒性

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稳定化飞灰填埋场渗滤液产量预测

中国环境科学 2018年第6期38卷 2202-2209页

作者：徐辉常红晨缪建冬陈萍詹良通罗小勇浙江理工大学建筑工程学院浙江杭州310018 浙江大学软弱土与环境土工教育部重点实验室浙江杭州310058 南京市城市建设投资控股(集团)有限责任公司江苏南京210009 上海市政工程设计研究总院(集团)有限公司上海200092

以南方某稳定化飞灰填埋场为研究对象,通过钻孔获取了新鲜、1、3、6和11个月等5个龄期的试样,并在实验室开展了颗粒分析、含水量、持水量等测试.不均匀系数Cu>5,曲率系数Cc<1,属于级配不良土,容易形成优势流通道.含水量介于18.6%~46.4%... 详细信息

以南方某稳定化飞灰填埋场为研究对象,通过钻孔获取了新鲜、1、3、6和11个月等5个龄期的试样,并在实验室开展了颗粒分析、含水量、持水量等测试.不均匀系数Cu>5,曲率系数Cc2.4%之间,随上覆应力的增大而减小,随龄期的增长而增大,由此建立了持水量计算模型.对于相同龄期和埋深的稳定化飞灰,其含水量要低于持水量2.6%~13.7%,这表明稳定化飞灰整体上未达到持水量状态,由此推测底部导排层收集到的渗滤液主要由雨水入渗后经过稳定化飞灰体内优势通道而进入导排层.在此基础上,建立了考虑填埋进程、降雨入渗量、优势流通道、稳定化飞灰产/吸水量等因素的填埋场渗滤液产量预测模型,并利用现场记录数据对模型进行了参数率定.模型分析结果表明,填埋场开始运营后的9个月内,渗滤液主要来源于降雨入渗量和运输车辆冲洗水量,分别占比约48%和52..当稳定化飞灰体内优势流通道占总孔隙的比例从0%增至2.%,导排层收集到的渗滤液量占渗滤液总收集量的比例从0增至34.1%.因此,建议对稳定化飞灰进行充分压实后再填埋,以减少优势流现象的发生,同时改用节水型车辆冲洗装置,最终降低渗滤液总产量.上述研究成果能够为我国类似稳定化飞灰填埋场中导排系统、调节池等的设计提供重要参考.

关键词：稳定化飞灰填埋场渗滤液产量持水量含水量优势流