geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The effect of crude oil on arsenate adsorption on goethite


, : The effect of crude oil on arsenate adsorption on goethite. Water Research 44(19): 5673-5683

This study reports the adsorption of arsenate, As(V), on goethite (α-FeO(OH)) and oil-coated goethite at experimental conditions chosen to mimic settings of wastewater from oil fields being released into marine and freshwater bodies. Similarities are evident between the As(V)-goethite and As(V)-oil-goethite systems: i) Adsorption is fast and saturation is achieved within 180 min, ii) Reaction rates approximate to a pseudo second order rate expression and range between 6.5 and 52.3 × 10(-4)g/μmol/min, iii) Adsorption mechanisms are best described with a Langmuir model, and iv) Adsorption capacity rises with decreasing pH reflecting the increase of positive charges on the goethite surface. A difference is discernable in that the adsorption of As(V) is reduced significantly when the goethite is coated with oil. The similar experimental macroscopic observations for both systems, i.e., Langmuir model fits, reaction rates, and the effect of pH and ionic strength (I), suggest that the oil reduces the effective and/or reactive surface area. The zeta potential (ζ) indicates that the oil coating also changes the surface charge of the goethite, shifting the pH point of zero charge from 9.8 to about 3, thus contributing to the reduced As(V) adsorption. FTIR spectra show that As(V) interacts with the carbonyl functional groups of the oil. Our results suggest that oil-covered goethite significantly reduces the adsorption of As(V) and this points to a potentially significant indirect effect of oil on the cycling of As(V) and other oxyanions in oil polluted waters.

US$19.90

PMID: 20599240

DOI: 10.1016/j.watres.2010.05.056


Other references

Wagener, J.S.; Farrell, P.M.; Corey, M., 2001: A debate on why my state (province) should or should not conduct newborn screening for cystic fibrosis (14th Annual North American Cystic Fibrosis Conference). Pediatric Pulmonology 32(5): 385-396

Anonymous, 2011: Very early weaning of common sole Solea soleaL larvae by means of different feeding regimes and three commercial microdiets Influence on performances, metamorphosis development and tank hygiene. We studied the feasibility of weaning common sole (Solea soleaL.) larvae at 13 days post hatching (dph) using commercial microdiets (MDs) while reducing live-feed utilization. Four dph larvae were fed two kinds of experimental weaning feeding regi...

Ibrahim, T.S.; Lee, R.; Baertlein, B.A.; Robitaille, P.M., 2001: B1 field homogeneity and SAR calculations for the birdcage coil. The finite-difference time-domain (FDTD) method is used to model a birdcage resonator. All the coil components, including the wires, lumped capacitors and the source, are geometrically modelled together. As such, the coupling effects within the bi...

Kukolev, N.I.; Kaidash, A.S., 1958: Means of controlling weeds in sunflowers in the Sudan.. Various systems of cultivation were compared for the control of Cirsium arvense. Deep ploughing (32-35 cm) + 2 autumn cultivations gave the best results, but it did not stimulate as many annual weeds to germinate as 2 diskings + a shallow ploughin...

Loftus, H.; Burnett, A.; Naylor, S.; Bates, S.; Greig, J., 2015: HIV control in postpartum mothers: a turbulent time. We conducted an audit looking at the management of HIV-positive women in the postpartum period. We found that of the women with a previous AIDS-defining condition or a CD4 count <350 cells/µL, 83% were correctly continued on antiretroviral the...

Gallandt, E.R.; Liebman, M.; Corson, S.; Porter, G.A.; Ullrich, S.D., 1998: Effects of pest and soil management systems on weed dynamics in potato. Results from the "Potato Ecosystem Project", a cropping systems study in northern Maine, were used to test the hypothesis that greater reliance on organic nutrient sources and less reliance on synthetic fertilizer sources can benefit wee...

Schmidlin, P.R.; English, H.; Duncan, W.; Belibasakis, G.N.; Thurnheer, T., 2016: Antibacterial potential of Manuka honey against three oral bacteria in vitro. Honey is an ancient natural remedy for the treatment of infected wounds. It has regained attention in the medical profession, as it has recently been reported to have a broad-spectrum inhibitory effect against bacteria. Data concerning Manuka hone...

Biemond, J.Elizabeth.; Eufrásio, T.S.; Hannink, G.; Verdonschot, N.; Buma, P., 2011: Assessment of bone ingrowth potential of biomimetic hydroxyapatite and brushite coated porous E-beam structures. The bone ingrowth potential of biomimetic hydroxyapatite and brushite coatings applied on porous E-beam structure was examined in goats and compared to a similar uncoated porous structure and a conventional titanium plasma spray coating. Specimens...

Penn, J., 2007: ANA-PAC advances pro-nursing agenda. American Nurse 39(4): 9-9

Gaunt I.F.; Gangolli S.D., 1971: Brominated maize m oil part 2 storage of lipid bound bromine in pigs fed bromine in pigs fed brominated maize m oil. Food & Cosmetics Toxicology 9(1): 13-19