当前位置：文档之家 › Biosorption of Pb(II) by Pleurotus ostreatus immobilized in calcium alginate gel

Biosorption of Pb(II) by Pleurotus ostreatus immobilized in calcium alginate gel

  • 格式：pdf
  • 大小：216.56 KB
  • 文档页数：5

BiosorptionofPb(II)byPleurotusostreatusimmobilized

incalciumalginategel

PanXianglianga,WangJianlonga,*,ZhangDaoyongb

aLaboratoryofEnvironmentalTechnology,INET,TsinghuaUniversity,Beijing100084,PRChinabJilinInstituteofArchitectureEngineering,Changchun,Jilin130021,PRChina

Received6August2004;accepted13December2004

Abstract

Thebiosorptionoflead(II)byfruitingbodiesofPleurotusostreatusimmobilizedincalciumalginatewasstudied.TheexperimentalresultsshowedthatthefruitingbodieswereeffectiveinremovingPb(II)fromsolution.Biosorptionequilibriumwasapproachedwithin45min.Pseudosecond-orderwasapplicabletoallthesorptiondataovertheentiretimerange.Intra-particlediffusionwasnottheonlyrate-determiningstep.ThesorptiondataconformedwelltoboththeLangmuirandtheFreundlichisothermmodel.Themaximumadsorptioncapacity(qmax)ontoP.ostreatusimmobilizedincalciumalginatewas121.21mggÀ1forPb(II).TheFT-IRanalysisshowedthatthemechanisminvolvedinbiosorptionofPb(II)byfruitingbodiesofP.ostreatuswasmainlyattributedtoPb(II)bindingofamideIgroup.#2005ElsevierLtd.Allrightsreserved.

Keywords:Lead;Biosorption;Pleurotusostreatus;Immobilization

1.Introduction

Contaminationoftheaquaticenvironmentbyheavymetals

isaworldwideenvironmentalproblem.Avarietyofmethods

areusedtoremovethesetoxicsubstancesfromeffluentsand

industrialwastewaterbeforedischargingintoanaturalwater

bodies.Themaintreatmenttechnologiesincludeprecipitation

andcoagulation,ion-exchange,membraneprocessesand

electrolytictechnologies.Howeverconventionaltreatment

technologieslikeprecipitationandcoagulationbecomeless

effectiveandmoreexpensivewhensituationsinvolvinghigh

volumesandlowmetalconcentrationsareencountered[1].

Theapplicationofmembraneprocessesandactivatedcarbon

arealsorestrictedduetohighcosts.Asaresult,cost-effective

alternativetechnologiesinvolvingremovalofheavymetals

fromwastewaterarebeingsoughttomeetdischargestandard.

Biosorption,basedonthemetalbindingcapacitiesofvarious

biologicalmaterials,hasgainedattentionintherecentyears

duetohighefficiencyandlowcost.Fungi,yeast,bacteria,

algaehaveproventobeveryeffectiveinremovingheavy

metalsfromsolutionsandtheirbiosorptionbehaviorofheavymetalshavebeenextensivelystudied[2,3].Inrecentyears,

numerousstudieshaveshowedthatsomecultivatedmush-

roomscanbioaccumulateconsiderableamountofmetalions.

Quiteafewresearchersreportedthatthefruitbodiesof

mushroomsaccumulateremarkablyhighconcentrationsof

CuandZn[4–12].Thisindicatesthepotentialuseof

mushroomsaseffectiveadsorbentsforheavymetals.

However,thereisstillverylittleinformationavailableon

metalbiosorptionbyfruitingbodiesofmushrooms.

Pleurotusostreatuswaschoseninthisstudybecauseit

isoneofthemostcommonediblemushroomsinChinaand

itsbiomassischeapandeasilyavailable.Leadwaschosen

becauseofitshightoxicity.Theobjectiveofthisstudywas

toinvestigatethekineticsandmechanismoflead

biosorptionbythefruitingbodyofP.ostreatusimmobi-

lizedwithcalciumalginate.

2.Materialsandmethods

2.1.Biomassimmobilization

FruitingbodiesofP.ostreatuswereobtainedfroma

vegetablemarket,driedat608Cinanoven,groundandsievedwww.elsevier.com/locate/procbioProcessBiochemistry40(2005)2799–2803

*Correspondingauthor.Tel.:+861062784843;fax:+861062771150.E-mailaddress:wangjl@tsinghua.edu.cn(W.Jianlong).

0032-9592/$–seefrontmatter#2005ElsevierLtd.Allrightsreserved.doi:10.1016/j.procbio.2004.12.007througha100-meshsieve.Immobilizationofbiomassvia

entrapmentwascarriedoutasfollows:1000mlof5%(w/w)

sodiumalginatesolutionwaspreparedinhot608Cdeionized

water.Aftercooling,60gofbiomasswasaddedandstirred.

Thealginate-biomassmixturewasthenextrudedthrougha

10mlsyringeintoa20%CaCl2solutionforpolymerization

andbeadformation.Theresultantbeadswereof3.5Æ0.2mm

diameterandwerecuredintheCaCl2solutionovernightat

48C.Thesphericalbeadswerethenrinsedthoroughlywith

deionizedwaterandstoredat48Cuntilfurtheruse.

2.2.Biosorptionexperiments

Thekineticbiosorptionexperimentwascarriedoutas

follows:10gofbeads(wd)wereaddedtoflaskscontaining

100mloflead-bearingsolutionwithpHadjustedtoavalue

of6.5with0.01MHCland0.01MNaOH.Flaskswere

shakenat150rpmat258C.Aliquotamounts(2ml)of

solutionwerecollected,periodically.Sampleswerefiltered

andleadconcentrationsinfiltrateweredeterminedbyAAS

(Vario6AAS).Thebiosorptiontestswerereplicatedtwice

andthestandarderrorvaluesrangedfrom1.5to4%.The

meanvalueswereused.

Forisothermanalysis,adsorptionexperimentswere

conductedbyvaryingtheinitiallead(II)ionconcentration

from10mg/lto500mg/l.Anamountof2gofbeads(wd)

wereaddedtoflaskscontaining20mloflead-bearing

solutionwithpHadjustedtoavalueof6.5.Otherconditions

weresameasinkineticbiosorptionexperiment.

2.3.FT-IRanalysisofbiomass

Certainamountofbeadswasdriedat408Candthen

groundandsievedthrough200meshsieveforFT-IR

analysis(Nexus470FT-IR).

合集下载

聚丁二酸丁二醇酯的释碳性研究

聚丁二酸丁二醇酯的释碳性研究

罗国芝等　聚丁二酸丁二醇酯的释碳性研究　

聚丁二酸丁二醇酯的释碳性研究＊　

罗国芝　徐桂梅刘　倩　谭洪新　（Ａｃ海海洋大学水产与生命学院，上海水产养殖工程技术研究中心，　上海高校知识服务平台上海海洋大学水产动物遗传育种中心，上海２０１３０６）　

摘要　研究了聚Ｔ－－酸Ｔ－－醇酯（ＰＢＳ）的释碳规律及其持续释碳能力，并探讨了以ＰＢＳ为碳源的反硝化效果及出水水质。　结果表明，ＰＢＳ不仅只在微生物的作用下降解，在非生物因素下同样可以得到降解，但在非生物因素和生物因素协同作用下降解得　更好；ＰＢＳ具有一定的缓释碳源能力，释碳总量随着时间的推移而增加，首先降解的是ＰＢＳ的非结晶部分，随后才降解结晶部分；　ＰＢＳ释放到水中的可溶性有机碳（ＤＯＣ）并不会被反硝化细菌全部利用，总会有所剩余，但剩余量低（６～７　ｍｇ／Ｌ），并不会严重影响　出水水质。　关键词　聚丁二酸丁二醇酯　固相反硝化　释碳性有机碳源　

Ｓｔｕｄｙ　ｏｎ　ｔｈｅ　ｃａｒｂｏｎ　ｒｅｌｅａｓｉｎｇ　ｃａｐａｃｉｔｙ　ｏｆ　ｐｏｌｙ　ｂｕｔｙｌｅｎｅ　ｓｕｃｃｉｎａｔｅ　ＬＵＯ　Ｇｕｏｚｈｉ，ＸＵ　Ｇｕｉｍｅｉ，ＬＪＵ　Ｑｉａｎ，ＴＡＮ　Ｈｏｎｇｘｉｎ．　（Ｓｈａｎｇｈａｉ　Ｕｎｉｖｅｒｓｉｔｙ　Ｋｎｏｗｌｅｄｇｅ　Ｎｅｔｗｏｒｋ　Ｓｈａｎｇｈａｉ　Ｏｃｅａｎ　Ｕｎｉｖｅｒｓｉｔｙ　Ａｑｕａｔｉｃ　Ａｎｉｍａｌ　Ｂｒｅｅｄｉｎｇ　Ｃｅｎｔｅｒ，Ｓｈａｎｇｈａｉ　Ｒｅｓｅａｒｃｈ　Ｃｅｎｔｅｒ　ｄｏｒ　Ａｑｕａｃｕｌｔｕｒｅ　Ｅｎｇｉｎｅｅｒｉｎｇ，Ｃｏｌｌｅｇｅ　ｏｆ　Ｆｉｓｈｅｒｉｅｓ　ａｎｄ　Ｌｉｆｅ，Ｓｈａｎｇｈａｉ　Ｏｃｅａｎ　Ｕｎｉｖｅｒｓｉｔｙ，Ｓｈａｎｇｈａｉ　２Ｏ１３０６）　Ａｂｓｔｒａｃｔ：Ｔｈｅ　ｓｏｌｉｄ－ｐｈａｓｅ　ｄｅｎｉｔｒｉｆｉｃａｔｉｏｎ　ｗｉｔｈ　ｐｏｌｙ　ｂｕｔｙｌｅｎｅ　ｓｕｃｃｉｎａｔｅ（ＰＢＳ）ａｓ　ｃａｒｂｏｎ　ｓｏｕｒｃｅ　ａｎｄ　ｂｉｏｆｉｌｍ　ｃａｒｒｉ—　ｅｒ　ｗａｓ　ｐｅｒｆｏｒｍｅｄ　ｔｏ　ｉｎｖｅｓｔｉｇａｔｅ　ｔｈｅ　ｃａｒｂｏｎ　ｒｅｌｅａｓｉｎｇ　ｒｕｌｅ　ａｎｄ　ｓｕｓｔａｉｎｅｄ　ｃａｒｂｏｎ　ｒｅｌｅａｓｉｎｇ　ｃａｐａｃｉｔｙ　ｏｆ　ＰＢＳ　ｄｕｒｉｎｇ　ｔｈｅ　ｄｅｎｉｔｒｉｆｉｃａｔｉｏｎ　ｐｒｏｃｅｓｓ．Ｔｈｅ　ｄｅｎｉｔｒｉｆｉｃａｔｉｏｎ　ｅｆｆｉｃｉｅｎｃｙ　ａｎｄ　ｅｆｆｌｕｅｎｔ　ｑｕａｌｉｔｙ　ｗｅｒｅ　ａｌｓｏ　ｒｅｓｅａｒｃｈｅｄ．Ｒｅｓｕｌｔｓ　ｓｈｏｗｅｄ　ｔｈａｔ　ｔｈｅ　ＰＢＳ　ｄｅｇｒａｄａｔｉｏｎ　ｃｏｕｌｄ　ｂｅ　ａｃｈｉｅｖｅｄ　ｎｏｔ　ｏｎｌｙ　ｕｎｄｅｒ　ｍｉｃｒｏｂｉａｌ　ａｃｔｉｏｎｓ　ｂｕｔ　ａｌｓｏ　ｕｎｄｅｒ　ｔｈｅ　ａｂｉｏｔｉｃ　ｃｏｎｄｉｔｉｏｎｓ．Ｔｈｅ　ｓｙｎ—　ｅｒｇｙ　ｏｆ　ｂｉｏｌｏｇｉｃａｌ　ａｎｄ　ａｂｉｏｔｉｃ　ａｃｔｉｏｎ　ｗａｓ　ｍｏｒｅ　ｃｏｎｄｕｃｉｖｅ　ｔｏ　ＰＢＳ　ｄｅｇｒａｄａｔｉｏｎ．ＰＢＳ　ｈａｄ　ｔｈｅ　ｃｅｒｔａｉｎ　ａｂｉｌｉｔｙ　ｏｆ　ｓｕｓｔａｉｎａｂｌｅ　ｃａｒｂｏｎ　ｒｅｌｅａｓｉｎｇ，ａｎｄ　ｔｈｅ　ｔｏｔａｌ　ｃａｒｂｏｎ　ｒｅｌｅａｓｉｎｇ　ｑｕａｎｔｉｔｙ　ｗａｓ　ｉｎｃｒｅａｓｅｄ　ｗｉｔｈ　ｅｘｔｅｎｄｉｎｇ　ｔｈｅ　ｄｅｎｉｔｒｉｆｉｃａｔｉｏｎ　ｔｉｍｅ．Ｔｈｅ　ａｍｏｒｐｈｏｕｓ　ｆｒａｃｔｉｏｎ　ｗａｓ　ｔｈｅ　ｆｉｒｓｔ　ｄｅｇｒａｄａｔｉｏｎ　ｐａｒｔ　ｏｆ　ＰＢＳ　ａｎｄ　ｔｈｅｎ　ｗａｓ　ｃｒｙｓｔａｌ　ｆｒａｃｔｉｏｎ．Ｔｈｅ　ｄｉｓｓｏｌｕｂｌｅ　ｏｒｇａｎｉｃ　ｃａｒｂｏｎ　ｒｅｌｅａｓｅｄ　ｆｒｏｍ　ＰＢＳ　ｔｏ　ｗａｔｅｒ　ｃｏｕｌｄ　ｎｏｔ　ｂｅ　ｆｕｌｌｙ　ｕｔｉｌｉｚｅｄ　ｂｙ　ｄｅｎｉｔｒｉｆｙｉｎｇ　ｂａｃｔｅｒｉａ，ｔｈｅ　ｒｅｍａｉｎｉｎｇ　ＤＯＣ　ｉｎ　ｗａｔｅｒ　ｗａｓ　ａｂｏｕｔ　６—７　ｍｇ／Ｌ．ａｎｄ　ｗｏｕｌｄ　ｎｏｔ　ｓｅｒｉｏｕｓｌｙ　ａｆｆｅｃｔ　ｅｆｆｌｕｅｎｔ　ｑｕａｌｉｔｙ．　Ｋｅｙｗｏｒｄｓ：ｐｏｌｙ　ｂｕｔｙｌｅｎｅ　ｓｕｃｃｉｎａｔｅ；ｓｏｌｉｄ—ｐｈａｓｅ　ｄｅｎｉｔｒｉｆｉｃａｔｉｏｎ；ｒｅｌｅａｓｉｎｇ　ｃａｒｂｏｎ　ｃａｐａｃｉｔｙ；ｏｒｇａｎｉｃ　ｃａｒｂｏｎ　ｓｏｕｒｃｅ　

26456235_氧化松木生物炭高效去除水中Pb及定量吸附机理

26456235_氧化松木生物炭高效去除水中Pb及定量吸附机理

氧化松木生物炭高效去除水中Pb及定量吸附机理

周振扬1袁杨驰浩1袁尹微琴1袁侯建华1袁2袁王圣森1袁2袁王小治1袁2

渊1.扬州大学环境科学与工程学院袁江苏扬州225127曰2.江苏省有机固体废弃物资源化协同创新中心袁江苏南京210095冤

咱摘要暂用H2O2尧KMnO4渊Mn冤和Mn渊CH3COO冤2窑4H2O渊MnC冤改性松木生物炭渊PW冤袁通过吸附实验和表征探究其

对Pb的去除能力和去除机理袁并定量分析各种吸附机制的贡献率遥PW-H2O2尧PW-Mn尧PW-MnC对溶液中Pb的吸附

量分别是原始生物炭的6尧8.5尧7.9倍遥两种锰改性生物炭比表面积显著提高袁其表面形成了MnO2遥阳离子交换对吸

附的贡献率占PW-Mn尧PW-MnC吸附Pb的74.6%尧87.5%遥表明BC-MnC是一种去除工业废水中重金属Pb的综合性能优异的材料遥咱关键词暂松木生物炭曰化学氧化曰工业废水咱中图分类号暂X703曰TQ424咱文献标识码暂A咱文章编号暂1005-829X渊2021冤07-0088-06

Efficientremovalandquantitativeadsorptionmechanisms

ofPbfromwaterbyoxidizedpinebiochars

ZhouZhenyang袁YangChihao袁YinHuiqin袁HouJianhua袁WangShensen袁WangXiaozhi

渊1.CollegeofEnvironmentalScienceandEngineering袁YangzhouUniversity袁Yangzhou225127袁China曰

2.JiangsuOrganicSolidWasteRecyclingCollaborativeInnovationCenter袁Nanjing210095袁China冤

Abstract院Biocharwaspreparedfrompinewood渊PW冤andmodifiedbyH2O2袁KMnO4andMn渊CH3COO冤2窑4H2O.

乙酸钙不动杆菌引发生物泡沫及其控制措施的研究——以福州祥坂污水处理厂为例

乙酸钙不动杆菌引发生物泡沫及其控制措施的研究——以福州祥坂污水处理厂为例

２００７年第６期　

总第１０８期　福　建　建　筑　

Ｆｕｉｉａｎ　Ａｒｃｈｉｔｅｃｔｕｒｅ＆Ｃｏｎｓｔｒｕｃｔｉｏｎ　Ｎｏ６・２００７　

Ｖｏｌ・１０８　

乙酸钙不动杆菌引发生物泡沫及其控制措施的研究　

以福州祥坂污水处理厂为例　

林玉清　

（福州祥坂污水处理厂福州３５０００２）　

摘　要：本文以福州祥坂污水处理厂为例，研究了生物泡沫大规模爆发的背景条件和早期异常症状，并通过对乙酸钙不动杆菌的　

生理特性分析，提出控制生物泡沫的物理和化学方法，指出结合早期症状和乙酸钙不动杆菌的生理特性，及时、合理调整工艺运行　

条件是最省时省力且有效的控制措施。　

关键词：生物泡沫　乙酸钙不动杆菌　控制措施　

中图分类号：Ｘ７０３　文献标识码：Ａ　文章编号：１００４—６１３５（２００７）０６—００７３—０２　

Ｒｅｓｅａｒｃｈ　Ｏｎ　Ｂｉｏｌｏｇｉｃａｌ　Ｆｏａｍ　Ｃｒｅａｔｅｄ　Ｂｙ　Ａｃｉｎｅｔｏｂａｃｔｅｒ　Ｃａｌｃｏａｃｅｔｉｃｕｓ　Ａｎｄ　Ｃｏｎｔｒｏｌｌｉｎｇ　Ｍｅａｓｕｒｅ　

－－－－－－・—－－——Ｔａｋｉｎｇ　Ｆｕｚｈｏｕ　Ｘｉａｎｇｂａｎ　Ｓｅｗａｇｅ　Ｔｒｅａｔｍｅｎｔ　Ｐｌａｎｔ　Ａｓ　Ａｎ　Ｅｘａｍｐｌｅ　

Ｌｉｎ　Ｙｕｅｑｉｎｇ　

（Ｆｕｚｈｏｕ　Ｘｉａｎｇｂａｎ　Ｓｅｗａｇｅ　Ｔｒｅａｔｍｅｎｔ　Ｐｌａｎｔ，Ｆｕｚｈｏｕ　３５０００２）　

Ａｂｓｔｒａｃｔ：Ｔａｋｉｎｇ　Ｆｕｚｈｏｕ　Ｘｉａｎｇｂａｎ　Ｓｅｗａｇｅ　Ｔｒｅａｔｍｅｎｔ　Ｐｌａｎｔ　ａｓ　ａｎ　ｅｘａｍｐｌｅ，ｔｈｅ　ａｕｔｈｏｒ　ｓｔｕｄｉｅｓ　ｔｈｅ　ｂａｃｋｇｒｏｕｎｄ　ｆａｃｔｏｒ　ｏｆ　ｔｈｅ　ｂｉｏｌｏｇｉｃａｌ　

ｆｏａｍ　ｅｒｕｐｔｉｏｎ　ｉｎ　ｇｒｅａｔ　ｓｃａｌｅ　ａｎｄ　ｔｈｅ　ｅａｒｌｙ　ｕｎｕｓｕａｌ　ｓｙｍｐｔｏｍｓ，ａｎａｌｙｓｅｓ　ｔｈｅ　ｐｈｙｓｉｏｌｏｇｉｃａｌ　ｃｈａｒａｃｔｅｒｉｓｔｉｃ　ｏｆ　Ａｃｉｎｅｔｏｂａｃｔｅｒ　ｃａｌｃｏａｃｅｔｉｃｕｓ，　

Adsorption of Pb(II) on variable charge soils amended with rice straw derived biochar

Adsorption of Pb(II) on variable charge soils amended with rice straw derived biochar

AdsorptionofPb(II)onvariablechargesoilsamendedwithrice-straw

derivedbiochar

Tian-YuJianga,b,JunJianga,Ren-KouXua,⇑,ZhuoLic

aStateKeyLaboratoryofSoilandSustainableAgriculture,InstituteofSoilScience,ChineseAcademyofSciences,P.O.Box821,Nanjing,PRChinabCollegeofResourceandEnvironment,NanjingAgricultureUniversity,Nanjing210095,PRChinacCollegeofResourceandEnvironment,NanjingForestryUniversity,Nanjing210037,PRChina

highlights

"Incorporationofbiocharmadesoilnegativechargemorenegative."IncorporationofbiocharincreasedPb(II)adsorptionbyvariablechargesoils."BiocharenhancedPb(II)adsorptionbysoilthroughformationofsurfacecomplexes.

articleinfo

Articlehistory:Received28November2011Receivedinrevisedform11April2012Accepted14April2012Availableonlinexxxx

Keywords:AdsorptionofPb(II)BiocharOxisolUltisolSurfacechargeZetapotentialabstract