Qualitative and quantitative characterisation of adsorption mechanisms of lead on four biochars.
dc.contributor.author | Shen, Zhengtao | |
dc.contributor.author | Zhang, Yiyun | |
dc.contributor.author | Jin, Fei | |
dc.contributor.author | McMillan, Oliver | |
dc.contributor.author | Al-Tabbaa, Abir | |
dc.date.accessioned | 2018-12-14T00:31:24Z | |
dc.date.available | 2018-12-14T00:31:24Z | |
dc.date.issued | 2017-12-31 | |
dc.identifier.issn | 0048-9697 | |
dc.identifier.uri | https://www.repository.cam.ac.uk/handle/1810/286918 | |
dc.description.abstract | The 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.medium | Print-Electronic | |
dc.language | eng | |
dc.publisher | Elsevier BV | |
dc.title | Qualitative and quantitative characterisation of adsorption mechanisms of lead on four biochars. | |
dc.type | Article | |
prism.endingPage | 1410 | |
prism.publicationDate | 2017 | |
prism.publicationName | Sci Total Environ | |
prism.startingPage | 1401 | |
prism.volume | 609 | |
dc.identifier.doi | 10.17863/CAM.34227 | |
dcterms.dateAccepted | 2017-08-02 | |
rioxxterms.versionofrecord | 10.1016/j.scitotenv.2017.08.008 | |
rioxxterms.version | AM | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2017-12 | |
dc.contributor.orcid | Shen, Zhengtao [0000-0002-4841-710X] | |
dc.contributor.orcid | Jin, Fei [0000-0003-0899-7063] | |
dc.identifier.eissn | 1879-1026 | |
rioxxterms.type | Journal Article/Review | |
cam.issuedOnline | 2017-08-06 | |
rioxxterms.freetoread.startdate | 2018-12-31 |
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