Treatment of oil spills using organo-fly ash

Banerjee, Soumik; Joshi, Milind V.; Jayaram, Radha V.

doi:10.1016/j.desal.2005.10.038

Cited by 51 publications

(17 citation statements)

References 6 publications

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“…We have chosen disperse red 11 (DR 11), acid orange 7 (AO 7), direct blue 6 (DB 6), and acid violet 49 (AV49) as representative disperse and anionic (acidic) dyes and studied the effect of pH on sorption (Figs. [5][6][7][8]. With increase in pH from 2.0 to 8.0 the sorption decreased for all the sorbents.…”

Section: Effect Of Phmentioning

confidence: 98%

“…3 shows that FA has been completely modified with HDTMA cations. As a result, the surface texture of FA has changed and the surface has become smooth [8]. …”

Section: Characterization Of the Sorbentsmentioning

confidence: 99%

“…This can be attributed to the replacement of surface Si-OH with Si-O[(CH 3 ) 3 NC 16 H 33 ] groups. Two new bands appeared at 2921 and 2854 cm −1 , which are due to C-H asymmetric stretching vibrations corresponding to -CH 2 -groups, which provides evidence for the presence of HDTMA [(CH 3 ) 3 NC 16 H 33 ] + on the FA surface.The band observed at 1455 cm −1 is due to -CH 2 -bending adjacent to >N + < of HDTMA[8].The SEM photographs of untreated FA and HDTMA-FA are shown inFigs. 2 and 3, respectively.…”

mentioning

confidence: 97%

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Effect of quaternary ammonium cations on dye sorption to fly ash from aqueous media

Banerjee

Joshi²,

Jayaram

2006

Journal of Colloid and Interface Science

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Section: Effect Of Phmentioning

confidence: 98%

“…3 shows that FA has been completely modified with HDTMA cations. As a result, the surface texture of FA has changed and the surface has become smooth [8]. …”

Section: Characterization Of the Sorbentsmentioning

confidence: 99%

mentioning

confidence: 97%

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Effect of quaternary ammonium cations on dye sorption to fly ash from aqueous media

Banerjee

Joshi²,

Jayaram

2006

Journal of Colloid and Interface Science

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“…In coastal marine environments, macroalgae are potentially exposed to relatively high concentrations of synthetic surfactants discharged in waste effluents or employed as oil-spill dispersants or sorbents (Banerjee et al 2006;Zoller 2006;Lara-Martín et al 2008). Compared with other organisms, however, the toxicity of surfactants to marine macroalgae is poorly defined (Singer et al 1995;Han et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Toxicity of Synthetic Surfactants to the Marine Macroalga, Ulva lactuca

Masakorala

Turner

Brown

2010

Water Air Soil Pollut

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The toxicities of three synthetic surfactants to the marine macroalga, Ulva lactuca, have been examined by monitoring chlorophyll a fluorescence quenching. The anionic surfactant, sodium dodecyl sulphate (SDS), exerted no measurable toxicity over the concentration range 0-10 mg L −1 , while presence of the non-ionic surfactant, Triton X-100 (TX), elicited a small reduction in photochemical efficiency that was independent of concentration. The cationic surfactant, hexadecyltrimethylammonium bromide (HDTMA), incurred a dose-dependent response to ∼3 mg L −1 (EC 50 =2.4 mg L −1 ), but a reduction in toxicity thereafter. Presence of TX had little effect on the toxicity of HDTMA but an equimolar concentration of SDS directly offset the impact of HDTMA on photochemical efficiency. Relative toxicities of the surfactants are attributed to differences in affinity for the algal surface and tendencies to disrupt cell membranes and interact with intracellular macromolecules. Non-linear dose responses and antagonistic effects are attributed to non-specific interactions between molecules of the same surfactant and electrostatic interactions between molecules of different amphiphilic character.

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“…Adebajo et al [17] distinguished three groups of adsorbents: synthetic mineral products, synthetic organic products and natural materials. These include active carbon [18], silica gels [19], fly ash [20], perlite [21], chrome shavings [22], clay minerals [23], exfoliated graphite [24,25], graphene [26], polyurethane [27], polystyrene [28], rice husk [29][30][31], kapok fiber [1,32,33] and many others.…”

Section: Introductionmentioning

confidence: 99%