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1、第36卷第4期環(huán)境科學(xué)學(xué)報(bào)Vol.36,No.42016年4月ActaScientiaeCircumstantiaeApr.,2016DOI:10.13671/j.hjkxxb.2015.0634謝超然,王兆煒,朱俊民,等.2016.核桃青皮生物炭對(duì)重金屬鉛、銅的吸附特性研究[J].環(huán)境科學(xué)學(xué)報(bào),36(4):1190?1198XieCR,WangZW,ZhuJM,etal.2016.Adsorptionofleadandcopperfromaqueoussolutionsonbiocharproducedfromwalnutgreenhusk[J].ActaScie
2、ntiaeCircumstantiae,36(4):1190?1198核桃青皮生物炭對(duì)重金屬鉛、銅的吸附特性研究?謝超然,王兆煒,朱俊民,高俊紅,張涵瑜,謝曉蕓,金誠(chéng)蘭州大學(xué)資源環(huán)境學(xué)院,甘肅省環(huán)境污染預(yù)警與控制重點(diǎn)實(shí)驗(yàn)室,蘭州730000收稿日期:2015?06?04修回日期:2015?08?13錄用日期:2015?08?29摘要:采用500℃限氧裂解法將農(nóng)林廢棄物核桃青皮制成核桃青皮生物炭,進(jìn)行了核桃青皮生物炭對(duì)鉛、銅的批量吸附實(shí)驗(yàn).同時(shí),利用掃描電2+2+鏡、FTIR紅外等方法探討了核桃青皮炭吸附Pb、Cu的特性,探究了吸附時(shí)間、溶液初始濃度、吸附溫度、吸附劑
3、投加量、溶液初始pH等因素2+2+對(duì)核桃青皮生物炭吸附Pb、Cu作用的影響,討論了吸附動(dòng)力學(xué)特性及吸附等溫特性.結(jié)果表明:溫度298.15K、pH為3~6條件下,核桃青皮生物炭吸附Pb2+和Cu2+在20min內(nèi)即可達(dá)到吸附平衡,核桃青皮炭最佳投加量分別為0.8、1.5g·L-1,最大吸附量分別為476.190、153.846-1mg·g;吸附過(guò)程符合準(zhǔn)二級(jí)動(dòng)力學(xué)方程,等溫吸附曲線符合Langmuir方程,說(shuō)明其吸附過(guò)程主要是近似單分子層的化學(xué)吸附.關(guān)鍵詞:生物炭;核桃青皮;吸附;鉛;銅文章編號(hào):0253?2468(2016)04?1190?09中圖分類號(hào):X703
4、文獻(xiàn)標(biāo)識(shí)碼:AAdsorptionofleadandcopperfromaqueoussolutionsonbiocharproducedfromwalnutgreenhusk?XIEChaoran,WANGZhaowei,ZHUJunmin,GAOJunhong,ZHANGHanyu,XIEXiaoyun,JINChengCollegeofEarthandEnvironmentalSciences,GansuKeyLaboratoryofEnvironmentPollutionPredictionandControl,LanzhouUniversity,Lanzh
5、ou730000Received4June2015;receivedinrevisedform13August2015;accepted29August20152+2+Abstract:Inthisstudy,theadsorptionsofPbandCuinaqueoussolutionsbybiocharderivedfromwalnutgreenhuskatpyrolysistemperatureof500℃wereevaluated.Thecharacteristicsofadsorbentbeforeandafteradsorptionweremainly
6、observedbyScanningElectronMicroscopeandFTIRspectra.2+2+Theeffectsofcontacttime,initialPbandCuconcentration,temperatureofexperiment,adsorbentdoseandinitialpHinbatchsorptionexperiments2+2+wereinvestigated.Thesorptioncapabilitywasevaluatedbyadsorptionkineticsandisothermmodels.ThemaximumPb
7、andCuadsorptioncapacityof-1walnutgreenhuskbiocharreached476.190and153.846mg·g,respectively.Theoptimumadsorptionconditionswerefoundtooccuratreactiontimeof20min,0.8(Pb2+),1.5(Cu2+)g·L-1adsorbentdoseandinitialpH3~6.Furthermore,theadsorptionkineticswasbestfittedbythepseudo?second2+2+orde