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Article: Role of Sulfur Trioxide (SO3) in Gas-Phase Elemental Mercury Immobilization by Mineral Sulfide

TitleRole of Sulfur Trioxide (SO3) in Gas-Phase Elemental Mercury Immobilization by Mineral Sulfide
Authors
Issue Date2019
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag
Citation
Environmental Science & Technology, 2019, v. 53 n. 6, p. 3250-3257 How to Cite?
AbstractMineral sulfide based sorbents were superior alternatives to traditional activated carbons for elemental mercury (Hg0) immobilization in industrial flue gas. A systematical study concerning the influence of sulfur trioxide (SO3) on Hg0 adsorption over a nanosized copper sulfide (Nano-CuS) was for the first time conducted. SO3 was found to significantly inhibit the Hg0 removal over Nano-CuS partially because SO3 oxidized the reduced sulfur species (sulfide) with high affinity to mercury to its oxidized sulfur species (sulfate). Moreover, a brand new 'oxidation-reduction' mechanism that led to a simultaneous oxidation of sulfide and reduction of mercury on the immobilized mercury sulfide (HgS) was responsible for the inhibitory effect. Even though the released Hg0 from the reduction of mercury in HgS could be oxidized by SO3 into its sulfate form (HgSO4) and recaptured by the sorbent, the 'oxidation-reduction' mechanism still compromised the Hg0 capture performance of the Nano-CuS because HgSO4 deposited on the sorbent surface could be easily leached out when environmentally exposed. These new insights into the role of SO3 in Hg0 capture over Nano-CuS can help to determine possible solutions and facilitate the application of mineral sulfide sorbents as outstanding alternatives to activated carbons for Hg0 immobilization in industrial flue gas. Copyright © 2019 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/274877
ISSN
2019 Impact Factor: 7.864
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, Z-
dc.contributor.authorLi, H-
dc.contributor.authorQu, W-
dc.contributor.authorZhang, M-
dc.contributor.authorFeng, Y-
dc.contributor.authorZhao, J-
dc.contributor.authorYang, J-
dc.contributor.authorShih, K-
dc.date.accessioned2019-09-10T02:30:44Z-
dc.date.available2019-09-10T02:30:44Z-
dc.date.issued2019-
dc.identifier.citationEnvironmental Science & Technology, 2019, v. 53 n. 6, p. 3250-3257-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/274877-
dc.description.abstractMineral sulfide based sorbents were superior alternatives to traditional activated carbons for elemental mercury (Hg0) immobilization in industrial flue gas. A systematical study concerning the influence of sulfur trioxide (SO3) on Hg0 adsorption over a nanosized copper sulfide (Nano-CuS) was for the first time conducted. SO3 was found to significantly inhibit the Hg0 removal over Nano-CuS partially because SO3 oxidized the reduced sulfur species (sulfide) with high affinity to mercury to its oxidized sulfur species (sulfate). Moreover, a brand new 'oxidation-reduction' mechanism that led to a simultaneous oxidation of sulfide and reduction of mercury on the immobilized mercury sulfide (HgS) was responsible for the inhibitory effect. Even though the released Hg0 from the reduction of mercury in HgS could be oxidized by SO3 into its sulfate form (HgSO4) and recaptured by the sorbent, the 'oxidation-reduction' mechanism still compromised the Hg0 capture performance of the Nano-CuS because HgSO4 deposited on the sorbent surface could be easily leached out when environmentally exposed. These new insights into the role of SO3 in Hg0 capture over Nano-CuS can help to determine possible solutions and facilitate the application of mineral sulfide sorbents as outstanding alternatives to activated carbons for Hg0 immobilization in industrial flue gas. Copyright © 2019 American Chemical Society.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag-
dc.relation.ispartofEnvironmental Science & Technology-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.titleRole of Sulfur Trioxide (SO3) in Gas-Phase Elemental Mercury Immobilization by Mineral Sulfide-
dc.typeArticle-
dc.identifier.emailFeng, Y: jerryf@HKUCC-COM.hku.hk-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.est.8b07317-
dc.identifier.pmid30802042-
dc.identifier.scopuseid_2-s2.0-85062801410-
dc.identifier.hkuros303614-
dc.identifier.volume53-
dc.identifier.issue6-
dc.identifier.spage3250-
dc.identifier.epage3257-
dc.identifier.isiWOS:000462098000034-
dc.publisher.placeUnited States-

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