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JournalofSouthChinaNormalUniversityNaturalScienceEdition201547272－77doi10．6054/j．jscnun．2014．12．0222014－02－17《》http//journal．scnu．edu．cn/n2011B09040077*Emailcgwac@163．com．1*2331．0103002．5280003．510006．．3Mg2+NH+4∶PO3－4=1.2∶3.0∶1.0pH8.0699mg/L83.36%．、PO3－4NH+4．25～300mg/kg．X703A1000－5463201502－0072－06SynthesisofStruvitebyCrystallizationofDesorbedSolutionContainingPhosphorusChenDong1*LiHuanwen2LinYing3WuJingyi31．ShenhuaZhunnengＲesourcesComprehensiveDevelopmentCo．Ltd．Ordos010300China2．FoshanGreenＲesourceEnvironmentalProtectionTechnologyCo．Ltd．Foshan528000China3．SchoolofChemistryandEnvironmentSouthChinaNormalUniversityGuangzhou510006ChinaAbstractThemaincontrolconditionsinstruvitesynthesiswereinvestigatedbycrystallizationusingsimulatedsolu-tioncontainingrichphosphorusasareactant．Theproductpurityofstruvitecanreach83.36%usingdesorbedso-lutioncontaining699mg/LphosphatewhenthemoleratioofMg2+∶NH+4∶PO3－4was1.2∶3.0∶1.0andpHwas8.0．ThesyntheticstruvitewasanalyzedbychemicalcompositionscanningelectronmicroscopeandFouriertransforminfraredspectroscopyFTIＲ．Theresultsshowthatthesyntheticstruvitehassimilarelementalcomposi-tionmorphologyandstructuretonaturalstruvite．TheFTIＲspectraofthesyntheticstruviteexhibitedthecharac-teristicPO3－4andNH+4．ＲesultsofthefertilizerefficiencyshowthatthesyntheticstruvitehadpositiveimpactonthegrowthofChinesecabbageattheamountof25～300mg/kg．Keywordsstruvitephosphorusdesorbedsolutioncrystallizationsynthesis、．1－2．/、．DS．．6MgNH4PO4·6H2OMAPP2O528.92%．25℃Ksp12.6．Mg2+、NH+4HPO2－4Ksp1～3．Mg2++PO3－4+NH+4+6H2O→MgNH4PO4·6H2O1Mg2++HPO2－4+NH+4+6H2O→MgNH4PO4·6H2O+H+2Mg2++H2PO－4+NH+4+6H2O→MgNH4PO4·6H2O+2H+．3DS3－4pH、．11．1DS、、．FA－4100722sJSM－6330FNicolet6700THEＲMONICOLET．1．21．2．110～23℃pH6.71～6.86CODCr45～65mg/L5.6～8.3NTU1.1～3.3mg/L0.6～2.1mg/L．1．2．2DS51．1．2．32．1Table1Chemicalcomponentofdesorbedsolutionofrichphosphorusmg/LpHPCl－SO2－4NO－3Ca2+Zn2+TFeMg2+8．269925681362189107．61．91．30．3P2Table2Elementaryphysicalandchemicalpropertiesoftestedsoil/g·kg－1/g·kg－1/g·kg－1/mg·kg－1/mg·kg－1/mg·kg－1/mg·kg－10．93．616．452．810．140．51．21．31．3．1、120mmol/L2916mg/L300mmol/L4200mg/L300mL100mmol/L3100mg/LNaOHpH．0.45μm．、、450℃48h．Ｒ=C－CtC×100%4ＲCmg/LCtmg/L．1．3．2Mg2+∶NH+4∶PO3－41.2∶3.0∶1.0．NaOHpH．Na0HpH60min、1h．0.45μm50℃372．FT-IＲ．1．3．30.5000g0.1mol/L100mL．N、P、Mg．N7．5=n×Mm×100%5mnM．1．3．4．P0、P1、P2、P3、P4、P56P0、25、50、100、200、300mg/kg63N、K2O100mg/kg．2.0kg．2011111“”2～32201211．．105℃30min65℃．8．1．3．5P、N9．22．12．1．1MAPMg2+∶NH+4∶PO3－41∶1∶1．Mg2+NH+4MAP．62mg/LMg2+NH+4．pH9.53．Mg2+∶NH+4∶PO3－41．1Mg2+∶NH+4∶PO3－4Figure1EffectsofMg2+∶NH+4∶PO3－4onphosphorusutilizationrateNH+4∶PO3－4=387%1NH+4∶PO3－4＜3NH+4PO3－4＞3NH+4∶PO3－4Mg2+∶PO3－41.2∶1.01.5∶1.02.0∶1.02%～3%．Mg2+∶NH+4∶PO3－4=1.2∶3.0∶1.0．2．1．2pHpH．31、62、124、248、496、992mg/LMg2+∶NH+4∶PO3－4=1.2∶3.0∶1.0NaOHpHpH2．2pHFigure2EffectsofpHonphosphorusutilizationefficiencypH．624747mg/LpH9.562mg/LpH9.0．496mg/LpHpH3．pH．pH7.09.590%72.3%．pHpH113.9%．pHNH+4NH310Mg2+OH－、PO3－4MgOH2Mg3PO4112．pH8.0～9.0．3pHFigure3EffectofpHonthepurityofstrutive2．2699mg/LpHMg2+∶NH+4∶PO3－4=1.2∶3.0∶1.0pHpH4．4pHFigure4EffectofpHonphosphorusutilizationefficiencyandthepurityofstruviteofdesorbedsolutionpH7.08.0pH8.887.75%．pH．pH2pH7.08.886.4%75.8%pH．pH8pH8.0．2．32．3．1pH496mg/L3．3pHTable3ThemainelementarycompositionandcontentofthesyntheticstruviteondifferentpHpHMg∶PN∶PPMg/%N/%P/%P2O5/%7．00．89240．938218．495．1412．1227．778．00．91210．875119．055．0012．6428．969．00．92000．803819．224．6412．7729．269．51．02780．795419．854．3912．2127．98101．20530．7641111．234．1011．8727．20111．54320．0405114．560．2212．0227．541．02600．940219．024．7611．2025．671119．795．7112．6228．92pH7.0～9.5N、MgP3．pH9.5MgN．N、Mg、P83.36%．2．3．25725．5AB80～100μm．5D50～70μm．APO3－40=62mg/LpH9.5BPO3－40=124mg/LpH9.5CPO3－40=496mg/LpH9.5DPO3－40=699mg/LpH8.85Figure5Thepatternofstruviteobtainedfordifferentconditions2．3．361004.9cm－12933.7cm－1PO3－4NH+412－13．6FTIＲFigure6FT－IＲspectraofthesyntheticstruvite2．42．4．114－15．．7．7Figure7EffectsofdifferentPfertilizeronbiomassofChinesecabbage2．25～300mg/kg19.0%、75.6%、152.4%、134.0%、48.6%．0.9%、16.8%、29.8%、64.9%、77.9%．300mg/kg．2．4．24．4Table4EffectsofdifferentPfertilizerontotalPconcentrations%P00．3540．2060．3540．206P10．4110．2210．5350．227P20．4380．2540．5470．349P30．4640．3410．5520．359P40．4820．3540．5730．375P50．5180．3780．5770．4676747．P100mg/kg．31699mg/LMg2+∶NH+4∶PO3－4=1.2∶3.0∶1.0、pH883.36%．、PO3－4NH+4．．2．1．P－J．200525164－69．ZhouAMWangDSTangHX．Adsorptionofphos-phorusonsediment-waterinterfaceJ．ActaScientiaeCircumstantiae200525164－69．2．J．2010305897－907．HaoXDYiLKWangCCetal．Situationandpros-pectsofphosphorusrecoverytechniquesJ．ActaScien-tiaeCircumstantiae2010305897－907．3SzogiAAVanottiMB．Prospectsforphosphorusrecov-eryfrompoultrylitterJ．BioresourceTechnology2009100225461－5465．4BiswasBKInoueKGhimireKNetal．ＲemovalandrecoveryofphosphorusfromwaterbymeansofadsorptionontoorangewastegelloadedwithzirconiumJ．Biore-sourceTechnology200899188685－8690．5．J．2013783025－3030．YeZPLiHWLinY．ＲemovalandrecoveringofphosphorusfromeutrophicriverwaterwithresinJ．ChineseJournalofEnvironmentalEngineering2013783025－3030．6ParsonsSDoyleJ．StruviterecoveryandreuseC∥The2nd