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dc.contributor.authorShen, Zhengtao
dc.contributor.authorZhang, Yiyun
dc.contributor.authorJin, Fei
dc.contributor.authorMcMillan, Oliver
dc.contributor.authorAl-Tabbaa, Abir
dc.date.accessioned2018-12-14T00:31:24Z
dc.date.available2018-12-14T00:31:24Z
dc.date.issued2017-12-31
dc.identifier.issn0048-9697
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286918
dc.description.abstractThe adsorption mechanisms of lead (Pb2+) on four biochars (SB produced from British hardwood at 600°C and three standard biochars produced from wheat straw pellets at 700°C (WSP700), rice husk at 700°C (RH700) and soft wood pellets at 550°C (SWP550)) were characterised qualitatively and quantitatively, using a combination of chemical and micro-structural methods. Sequential extraction test results show that Pb2+ was predominantly adsorbed on SB (85.31%), WSP700 (75.61%) and RH700 (85.76%) as acidic soluble fraction, which was potentially bioavailable if applied in soil. The exchangeable fraction for SB, WSP700 and RH700 was low (1.38-4.29%) and their water soluble fraction was negligible (0-0.14%). Micro-structural analysis further investigated this fraction and confirmed the presence of cerussite (PbCO3) on SB and hydrocerussite (Pb3(CO3)2(OH)2) on WSP700, RH 700 and SWP550, suggesting a mechanism of surface precipitation for Pb2+ adsorption on the biochars. The percentages of Pb2+ in the form of PbCO3 on SB (82.24%) and Pb3(CO3)2(OH)2 on WSP700 (13.00%), RH 700 (19.19%) and SWP550 (29.70%) were quantified using thermogravimetric analysis (TGA). This study suggests that it is feasible to quantify different adsorption mechanisms of Pb2+ on biochars, which is important for the practical application of biochar in water and/or soil treatment.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherElsevier BV
dc.titleQualitative and quantitative characterisation of adsorption mechanisms of lead on four biochars.
dc.typeArticle
prism.endingPage1410
prism.publicationDate2017
prism.publicationNameSci Total Environ
prism.startingPage1401
prism.volume609
dc.identifier.doi10.17863/CAM.34227
dcterms.dateAccepted2017-08-02
rioxxterms.versionofrecord10.1016/j.scitotenv.2017.08.008
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2017-12
dc.contributor.orcidShen, Zhengtao [0000-0002-4841-710X]
dc.contributor.orcidJin, Fei [0000-0003-0899-7063]
dc.identifier.eissn1879-1026
rioxxterms.typeJournal Article/Review
rioxxterms.freetoread.startdate2018-12-31


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