Acid base reactions, phosphate and arsenate complexation, and their competitive adsorption at the surface of goethite in 0.7 M NaCl solution

Gao, Yan; Mucci, Alfonso

doi:10.1016/s0016-7037(01)00589-0

Cited by 283 publications

(168 citation statements)

References 46 publications

Supporting

Mentioning

148

Contrasting

Unclassified

Order By: Relevance

“…The pH edge of As(V) adsorption shows similar trend to the ones reported by several previous studies [25][26][27][28]. However, the surface loading concentration decreases from 0.85 to 0.58 mol/m 2 for 0.1 mM As(V), from 1.74 to 1.12 mol/m 2 for 0.5 mM As(V) in the pH interval of 3-10, less than the changes of the previously reported results [25][26][27][28]. It is probably due to the systemic variation in goethite surface area measurement and differences in electrolyte.…”

Section: Effects Of Ph and Ionic Strengthsupporting

confidence: 88%

Arsenate and cadmium co-adsorption and co-precipitation on goethite

Jiang

Luo

et al. 2013

Journal of Hazardous Materials

146

View full text Add to dashboard Cite

Section: Effects Of Ph and Ionic Strengthsupporting

confidence: 88%

Arsenate and cadmium co-adsorption and co-precipitation on goethite

Jiang

Luo

et al. 2013

Journal of Hazardous Materials

146

View full text Add to dashboard Cite

“…(Gao and Mucci, 2001;Özdemir and Dunlop, 2000;Schwertmann and Cornell, 2000). (Bethke et al, 2011;Jakobsen and Postma, 1999;Kirk et al, 2004;Koretsky et al, 2003).…”

mentioning

confidence: 99%

Biotic and Abiotic Reduction of Goethite (α-FeOOH) by Subsurface Microorganisms in the Presence of Electron Donor and Sulfate

Kwon¹,

Yang²,

Shim³

et al. 2014

Journal of Soil and Groundwater Environment

View full text Add to dashboard Cite

To better understand dissimilatory iron and sulfate reduction (DIR and DSR) by subsurface microorganisms, we investigated the effects of sulfate and electron donors on the microbial goethite (α-FeOOH) reduction. Batch systems were created 1) with acetate or glucose (donor), 2) with goethite and sulfate (acceptor), and 3) with aquifer sediment (microbial source). With 0.2 mM sulfate, goethite reduction coupled with acetate oxidation was limited. However, with 10 mM sulfate, 8 mM goethite reduction occurred with complete sulfate reduction and x-ray absorption fine-structure analysis indicated the formation of iron sulfide. This suggests that goethite reduction was due to the sulfide species produced by DSR bacteria rather than direct microbial reaction by DIR bacteria. Both acetate and glucose promoted goethite reduction. The rate of goethite reduction was faster with glucose, while the extent of goethite reduction was higher with acetate. Sulfate reduction (10 mM) occurred only with acetate. The results suggest that glucose-fermenting bacteria rapidly stimulated goethite reduction, but acetate-oxidizing DSR bacteria reduced goethite indirectly by producing sulfides. This study suggests that the availability of specific electron donor and sulfate significantly influence microbial community activities as well as goethite transformation, which should be considered for the bioremediation of contaminated environments.

show abstract

“…61 Este óxido é normalmente encontrado na natureza como partículas de tamanho pequeno, 62 influenciando o transporte e o destino dos numerosos íons e espécies aquosas. Assim, seu comportamento superficial tem sido amplamente investigado para um considerável número de adsorbatos iônicos ambientalmente relevantes.…”

unclassified

“…61 Estas impurezas têm um impacto significativo sobre as propriedades da superfície da goethita e, por isso, muitos pesquisadores têm estudado a associação de goethita com outros elementos análogos sintéticos. 63,64 Trabalhos científicos têm relatado que a capacidade de adsorção de goethita aumenta com a incorporação de íons metálicos em sua estrutura.…”

unclassified