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1、第34卷第8期工業(yè)水處理Vo1.34No.82014年8月IndustrialWaterTreatment_ug.'01金礦區(qū)含重金屬酸性廢水處理研究趙述華一,張?zhí)?,史偉,陳志良,潘偉斌,黃永芳,龍華杰(1.華南理工大學(xué)環(huán)境與能源學(xué)院,廣東廣州510006;2.深圳市環(huán)境科學(xué)研究院,廣東深圳518001;3.環(huán)境保護(hù)部華南環(huán)境科學(xué)研究所,廣東廣州510655)[摘要]以某金礦區(qū)含重金屬酸性廢水為研究對(duì)象,采用石灰作為中和劑,花生殼、改性花生殼、玉米芯、花生殼+粉煤灰作為吸附劑進(jìn)行處理,比較分析了其對(duì)酸的中和能力以及重金屬的去除效果。結(jié)果表明,石灰投加量為20
2、s/L時(shí),廢水pH提高到6.21;投加石灰對(duì)廢水中As、Cd、Pb、Zn都有明顯的去除效果。4種吸附劑對(duì)廢水中的重金屬也有一定去除效果,其中對(duì)Pb和Zn的去除效果最好:不同吸附劑對(duì)重金屬的去除效果存在差異,花生殼+粉煤灰的效果最好。該金礦區(qū)廢水經(jīng)石灰中和處理及花生殼+粉煤灰吸附處理后,廢水pH升至6.63,As、Cd、Pb、Zn的去除率分別達(dá)到96.5%、44.9%、85.4%、97.2%,可形成一種有效的金礦區(qū)含重金屬?gòu)U水的處理方法。[關(guān)鍵詞]重金屬;酸性廢水;石灰;吸附劑【中圖分類(lèi)號(hào)]x703[文獻(xiàn)標(biāo)識(shí)碼]A[文章編號(hào)]1005—829X(2014)08—
3、0032StudyonthetreatmentofacidicwastewatercontainingheavymetalSInqoldmlnlngareasZhaoShuhua1,2,ZhangTaiping,ShiWei,ChenZhiliang3,PanWeibin,HuangYongfang,LongHuajie(1.CollegeofEnvironmentandEnergy,SouthChinaUniversityofTechnology,Guo~gzhou510006,China;2.ShenzhenAcademyofEnvironmentalSc
4、ience,Shenzhen518001,China;3.SouthChinaInstituteofEnvironmentalSciences,MEP,Gnangzhou510655,China)Abstract:Acidicwastewatercontainingheavymetalsingoldminingareashasbeentakenasaresearchobject,usinglimeasneutralizingagent,andpeanutshell,modifiedpeanutshell,corncobandpeanutshell+flyash
5、asadsorbentsfortreatingthewastewater.Theireffectsontheneutralizingcapacityforacidandremovingeffectsonheavymetalshavebeencomparedandanalyzed.Theresultsindicatethatwhenthelimedosageis20g/L,thewastewaterpHcanbeincreasedto6.21.AddinglimehassignificanteffectsontheremovalofAs,Cd,Pb,andZnf
6、romwastewater.Fourkindsofadsorbentshavecertaineffectsontheremovalofheavymetalsfromwastewater,amongwhichtheremovingeffectsonPbandZnarethehighest.Differentadsorbentshavedifferentremovingeffectsontheremovalofheavymetals,amongwhichpeanutshell+flyashhasthebestremovingeffects.Afterthewast
7、ewateringoldminingareashasbeentreatedbyneutralizationtreatmentwithlimeandadsorptiontreatmentwithpeanutshell+flyash,thepHofwastewaterincreasesto6.63,andtheremovingratesofAs,Cd,Pb,andZnreach96.5%,44.9%,85.4%,97.2%,respectively.Asaresult,akindofeficienttreatmentmethodforremovingheavyme
8、talsfromwastewateri