Wu, Shi-Tou

[["dc.bibliographiccitation.firstpage","73"],["dc.bibliographiccitation.journal","Journal of Geochemical Exploration"],["dc.bibliographiccitation.lastpage","79"],["dc.bibliographiccitation.volume","169"],["dc.contributor.author","Tian, Huan"],["dc.contributor.author","Bao, Zhengyu"],["dc.contributor.author","Wei, Changhua"],["dc.contributor.author","Zhang, Hongyu"],["dc.contributor.author","Wu, Shitou"],["dc.contributor.author","Gu, Anqing"],["dc.contributor.author","Xie, Shuyun"],["dc.date.accessioned","2018-11-07T10:08:03Z"],["dc.date.available","2018-11-07T10:08:03Z"],["dc.date.issued","2016"],["dc.description.abstract","Fertilizing soil with selenium (Se)-enriched slate could increase Se levels in crops; however, this process is limited by the low Se bioavailability of Se-enriched slate. In this work, a calcination procedure for Se -enriched slate using CaO as a sorbent was developed, and the process significantly improved the bioavailability of Se. The calcination experiments were conducted with the calcium (Ca)-based sorbents CaO or CaCO3 at 300-800 degrees C. Most of the Se in the organic matter and sulfides were emitted between 400 and 650 degrees C, and CaO exhibited a higher adsorption efficiency of Se compared with CaCO3. The optimum temperature was 600 degrees C as determined by the high contents of bioavailable Se (10 times that of the original slate) and Se(VI) in the calcinated samples with the sorbent CaO. Both the physical adsorption of CaO and the formation of CaSeO3 contributed to the conversion of Se associated with organic matter and sulfide minerals to bioavailable Se species. The transformation of Se(IV) to Se(VI) might have been caused by the co-oxidation of O-2 and the generation of HCl during the calcination process. The Se concentrations in potatoes amended with activated slate reached 650 +/- 23 mu g/kg, which verified the high Se bioavailability of the calcinated product. The proposed calcination procedure could support the exploitation of Se -enriched slate and the preparation of Se soil amendments. (C) 2016 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.gexplo.2016.07.015"],["dc.identifier.isi","000383943800007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39404"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1879-1689"],["dc.relation.issn","0375-6742"],["dc.title","Improved selenium bioavailability of selenium-enriched slate via calcination with a Ca-based sorbent"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","763"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Journal of Earth Science"],["dc.bibliographiccitation.lastpage","776"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Tian, Huan"],["dc.contributor.author","Ma, Zhenzhen"],["dc.contributor.author","Chen, Xiaolei"],["dc.contributor.author","Zhang, Hongyu"],["dc.contributor.author","Bao, Zhengyu"],["dc.contributor.author","Wei, Changhua"],["dc.contributor.author","Xie, Shuyun"],["dc.contributor.author","Wu, Shitou"],["dc.date.accessioned","2018-11-07T10:07:59Z"],["dc.date.available","2018-11-07T10:07:59Z"],["dc.date.issued","2016"],["dc.description.abstract","Ziyang County, Shaanxi Province, China is a world known selenium (Se)-enriched area, and a severe selenosis incident was reported in Naore Village during the 1990s. This study investigated the geochemical characteristics of Se and its fractions in Se-enriched rocks from Ziyang. Se distribution is uneven, ranging from 0.23 to 57.00 mu g/g (17.29 +/- 15.52 mu g/g). Se content is higher in slate than chert, and even lower in carbonate rocks. Cd, As and V are enriched but Pb is depleted in Se-enriched strata. Se has different correlations both with TS (total sulfur) (R-2=0.59 for chert) and TC (total carbon) (R-2=0.77 for slate, R-2=0.87 for carbonate). Se has significant positive correlations with V (r=0.65), As (r=0.485), Cd (r=0.459) and Pb (r=0.405). The Se level correlates with mineral content, positively with pyrite, chlorite and illite, negatively with albite. Se associated with sulfide/selenide and elemental Se are the predominant fractions of total recovered Se, suggesting that a reducing environment and the formation of sulfides were significant to Se deposition during its geochemical cycle. Although low concentration of bio-available Se (average 5.62%+/- 3.69%) may reduce the risk of Se poisoning in the target area, utilization of Se-rich rock as natural fertilizer should be restricted."],["dc.identifier.doi","10.1007/s12583-016-0700-x"],["dc.identifier.isi","000384708700004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39389"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1867-111X"],["dc.relation.issn","1674-487X"],["dc.title","Geochemical Characteristics of Selenium and Its Correlation to Other Elements and Minerals in Selenium-Enriched Rocks in Ziyang County, Shaanxi Province, China"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]