Adsorption of pesticides from aqueous solutions using oil shale ash

Al-Qodah, Zakaria; Shawaqfeh, Ahmad T.; Lafi, Walid K.

doi:10.1016/j.desal.2006.06.019

Cited by 110 publications

(53 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, it is very expensive and has high operating cost [8,9]. Therefore, in recent years, considerable attention has been devoted to the study of different types of low cost materials such as oil shale ash [4], acid treated data stones [8], chestnut shell [10], watermelon peels [11], wood charcoal [12], fly ash [13], modified rice husk [14], surfactant-modified coir pith [15], agro-industrial wastes [16], wood fly ash [17], tamarind fruit shell [18], peel of Cucumis sativa fruit [19], etc., for the adsorption of pollutants from water. Nevertheless, the literature on this subject is still inadequate, and more studies are required to find low cost adsorbents for removal of pollutants from water.…”

Section: Introductionmentioning

confidence: 99%

“…The toxicity, potential bioaccumulation, and non-biodegradability of these compounds represent risks to the environment, especially for human health [1]. Since most pesticides are used in open environment such as ploughed fields, their residues have become one of the major diffuse pollution risks to the world drinking water supplies [2][3][4]. Various studies have reported the contamination of water resources by these chemicals, even at considerable distances from the point of original application [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Özcan

Tor

Aydın

2011

CLEAN Soil Air Water

View full text Add to dashboard Cite

This work describes the potential usability of neutralized red mud for the removal of organochlorine pesticides (OCPs) from aqueous solutions. After examination on the adsorption capability of neutralized red mud for all studied OCPs, the experiments were performed by employing aldrin as a model compound. The effect of several parameters, such as contact time, pH of the solution, initial aldrin concentration, and dosage of the adsorbent was evaluated by batch experiments. The determination of OCPs was carried out using traditional liquid-liquid extraction followed by a GC coupled with m-electron capture detector (GC-mECD). The results showed that adsorption equilibrium time depended upon the initial aldrin concentration and adsorption followed the second-order kinetic model. Kinetic study also indicated that the film diffusion mechanism was a main rate control mechanism. The removal was explained by considering the electrostatic interactions between metal oxides surface of the neutralized red mud and inductively charged centers (negative charge (dÀ) of chlorine atoms and positive charge (dþ) of p-cloud aromatic ring) of the aldrin molecules. In comparison to the Langmuir isotherm model, the Freundlich model better represented the adsorption data. The neutralized red mud was also succesfully employed for the removal of OCPs from real water samples, including tap water and surface (lake) water, fortified with studied OCPs.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Özcan

Tor

Aydın

2011

CLEAN Soil Air Water

View full text Add to dashboard Cite

show abstract

“…1,[3][4][5][6][7][8][9][10][11][12][13] Nesse sentido, o xisto retortado (XR), subproduto produzido em maior quantidade pelo processo Petrosix, tem como uma das alternativas de destino o uso como insumo na agricultura. 2 O XR é classificado como resíduo classe II A -não perigoso e não inerte, 6 segundo a norma ABNT NBR 10004/2004, que classifica os resíduos sólidos quanto aos seus riscos potenciais ao meio ambiente e à saúde pública, para que possam ser gerenciados adequadamente.…”

Section: Introductionunclassified

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

et al. 2016

View full text Add to dashboard Cite

7 , NaOH, and KMnO 4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capacity (CEC). Structural characterization was performed using X-ray diffraction, X-ray fluorescence, and infrared spectroscopy to identify the functional groups present. The best results were achieved using Route 2 with solutions of either H 3 PO 4 or HNO 3 /H 2 SO 4 (3:1), giving CEC values of 315 and 316 mmol c kg -1 , respectively. The pyrolyzed oil shale functionalized using Route 2 (reflux) with NaOH as the activating agent showed the highest sorption of methylene blue (35.6 mg g -1 ). The main mechanisms observed for oil shale by-product functionalization were oxidation, nitration, and CaO leaching.

show abstract

“…The extent of diazinon uptake decreases over the contact time, because of the gradual decrease in the number of the surface sites. The remaining vacant sites become difficult to be reached due to repulsive forces between the solute molecules on the surface and bulk phase, thus leading to saturation (Al-Qodah et al 2007;Ramanaiah et al 2007). When the biosorption involves a surface reaction, the initial step is rapid.…”

Section: Effect Of the Initial Concentration On The Diazinon Biosorptionmentioning

confidence: 99%

“…Thus, a correlation of the equilibrium data by either theoretical or empirical equations is essential for the practical operations to optimize the design of the biosorption system; so it is important to establish the most appropriate correlation for the equilibrium curves. The isotherm data are analyzed using the commonly used equilibrium models, namely the Langmuir and Freundlich ones (Hamdaoui et al 2008;Akar et al 2009;Al-Qodah et al 2007). The mathematical expressions are, respectively, given by…”

Section: Batch Isotherm Studiesmentioning

confidence: 99%

Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

et al. 2017

View full text Add to dashboard Cite

This study explores the feasibility of pre-treated coffee waste (PCW) as biosorbent for the removal of diazinon. The effect of the pesticide concentration (6-20 mg), solution pH (3-11.5), temperature (15-40°C) and co-existing inorganic ions (H 2 PO 4 -, NO 3 -) on the diazinon biosorption over PCW is investigated. The experimental results indicate an optimal pH of 7.3 for the diazinon elimination on PCW (1 g L -1 ). The Langmuir model describes well the isotherm data with a high regression coefficient (R 2 [ 0.990) and a maximum monolayer biosorption capacity of 18.52 mg g -1 at 15°C. It is also observed that the intra-particle diffusion is not the rate-controlling step. A comparison is evaluated between the pseudo-second-order and intra-particle diffusion kinetic models; the experimental data are well fitted by the pseudosecond-order kinetic model. The biosorption capacity decreases with increasing temperature for a diazinon concentration of 10 mg L -1 . The negative enthalpy DH°( -63.57 kJ/mol) indicates that the diazinon biosorption onto PCW is exothermic. Under optimal conditions, the biosorption reaches 95% after 90 min. The removal efficiency decreases from 95 to 65.67 and 48.9% for the diazinon alone and in the presence of NO 3 -and H 2 PO 4 -(100 mg L -1 ), respectively.

show abstract

Adsorption of pesticides from aqueous solutions using oil shale ash

Cited by 110 publications

References 23 publications

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Removal of Organochlorine Pesticides from Aqueous Solution by Using Neutralized Red Mud

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

Contact Info

Product

Resources

About