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时间:2020-03-27
《不同洗涤蜂窝煤灰渣对污染土壤中铅的稳定作用研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2012,31(6):I124—1130JournalofAgro-EnvironmentScience不同洗涤蜂窝煤灰渣对污染土壤中铅的稳定作用研究李立平,席欢,邢维芹,向国强,张科,胡昌乾(河南工业大学化学化工学院,郑州450001)摘要:蜂窝煤灰渣具有稳定污染土壤中铅的作用,但可增大上壤pH和电导率(Ec)。将蜂窝煤灰渣经过水洗和稀盐酸酸洗后加入铅污染土壤(10GOmg-kg-。Pb)。研究丁不同处理灰渣对铅有效性和土壤性质的影响。结果表明,灰渣经水洗和酸洗后。其pH(分别下降1.94、3.70)和电导率(O.785、0.890mS·em。)明显下降,莺金属有效性和全茸
2、也有一定程度的下降。水洗和酸洗灰渣加人土壤后。土壤磷有效性有一定的七升。污染土壤在未加磷条件F加入原灰渣、水洗灰渣和酸洗灰渣后,DTPA—Pb含量分别下降67.2、195、117mg·kg~,加磷情况下加入这3种灰渣土壤DTPA—Ph含量分别降低102、91.8、86.8Ⅱ培·kg~,各处理与对照的差异均达到0.05的显著水平。连续提取的结果表明,不同处理对土壤铅形态的影响不明显。关键词:蜂窝煤灰渣;水洗;酸洗;铅;土壤;稳定中图分类号:X53文献标志码:A文章编号:1672-2043(2012)06一1124-07ImmobilizationofLeadinSoilwithWashedHo
3、neycombBriquetteCombustionResidueULi—ping,XIHuan,XINGWei-qin,XIANGGuo-qiang,ZHANGKe,HUChang-qian(SchoolofChemistryandChemicalEngineering,HenanUniversityofTeehnology,Zhengzhou450001,China)Ahstraet:Phosphatehasbeenwidelyusedasthemosteffecfiveamendmentforlend(Pb)insoil.Duetothelimitedphosphaterockreno
4、ui'Ce.peoplearetryingwastesorby-produetsasalternativesforphosphate.Honeycombbriquettecombustionresidue(HBCR)isaconunonsolidwasteinrLiralChina.OurearherworkobservedthatHBCRcouldbeusedtoimmobilizePbinsoil.however.applicationofHBCRinseilre—sultediUelevatedpHandelectricconductivity(EC).Inordertodecreas
5、eitsnegativeeffectontIIepHandECofsoil.HBCRWaswashedwithwalerordilutehydrochloricacid(HCI)beforebeingappliedtoasoilspikedwith1000mg·kg。Pb.r11}Iewater—ordiluteHCl一washingdecreasedpH(1.94and3.70pHunit,respectively,comparedwiththetill—wasbedHBCR)andEC(O.785and0.890mS·cm。)oftheHBCRgreatly.andtheavailabi
6、lityandthetotalcontentofheavymetalsslightly.Applicationofthewater—ordiluteHCI—washedHBCRresultedinhigheravailabilityofphosphorusinthesoil.TheconcentrationsofD‘rPA—extractablePbinthesoilsamendedwithun-washed.water-washedanddiluteHCI—washedHBCRdecreased67.2mg‘kg一,195mg’kg’’and117mg·kg一,whilethesevalu
7、eswere102mg·kg一,91.8mg·kg-Iand86.8mg·kg一.whenamendedwithadditionalamendmentofphosphate.Thediffereuce8betweentheamendedsoilsandtheeontrolwerestatisticallysignificantat0.05level.SequentialextrdctionofthesoilP
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