Degradation and by-product formation of diazinon in water during UV and UV/H2O2 treatment

Shemer, Hilla; Linden, Karl G.

doi:10.1016/j.jhazmat.2005.12.028

Cited by 145 publications

(66 citation statements)

References 14 publications

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“…Various pathways for degradation of this compound were proposed. Shemer & Linden, 2006, studied the degradation and the degradation products of diazinon using photocatalyzed reactions with the application of UV light and UV/H 2 O 2 catalyst. The addition of H 2 O 2 was very effective in this process, increasing the rate of removal of diazinon from aqueous samples.…”

Section: Degradation Processmentioning

confidence: 99%

Analytical Methods for Performing Pesticide Degradation Studies in Environmental Samples

Cardeal¹,

Souza²,

Amorim³

2011

Pesticides - Formulations, Effects, Fate

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Section: Degradation Processmentioning

confidence: 99%

Analytical Methods for Performing Pesticide Degradation Studies in Environmental Samples

Cardeal¹,

Souza²,

Amorim³

2011

Pesticides - Formulations, Effects, Fate

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“…The World Health Organization (WHO) has classified it as a class II pesticide. Its toxicity for aquatic organisms is 350 ng/L, and its lethal dose for humans is about 90-444 mg/kg body weight (15)(16)(17)(18). According to German standards, its maximum acceptable residue level is 1 ppm (15).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of diazinon from aqueous solutions onto an activated carbon sample produced in Iran

Akbarlou

Alipour

Heidari

et al. 2017

Environ Health Eng Manag

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Background: Considering the severe health and environmental hazards caused by the entry of diazinon toxin into water resources, its removal is very important. Given the high costs of imported adsorbents, this research attempted to evaluate, for the first time, the efficiency of Iranian activated carbon in removing diazinon from aqueous solutions. Methods: In this batch experimental study, the effects of contact time (5-90 minutes), adsorbent concentration (0.5-30 g/L), initial concentration of diazinon (5-50 mg/L), and pH (3-10) on the adsorption of diazinon onto the activated carbon were evaluated. Concentrations of diazinon were measured using a high pressure liquid chromatography (HPLC) instrument. The specific surface area of the adsorbent was determined by BET and BJH methods. The experimental adsorption data was analyzed using Langmuir and Freundlich isotherm models. Pseudo first-order and pseudo second-order kinetics models were employed to determine kinetics. Moreover, data was analyzed using SPSS version 19, and Pearson correlation and analysis of variance (ANOVA) tests were performed at a significance level of 0.05. Results: The optimum contact time, sorbent dose, and pH were 30 minutes, 10 g/L, and 5, respectively. The adsorbent could adsorb diazinon with a removal efficiency of 92.5% under optimum conditions (initial concentration: 20 mg/L). The experimental data was better described by the pseudo-second order kinetic and Langmuir isotherm. A maximum adsorption capacity of 71.4 mg/g was calculated by the Langmuir isotherm model. Conclusion: With respect to the high adsorption capacity of Iranian activated carbon, this sorbent can be considered an efficient adsorbent for the removal of diazinon from aqueous solutions. Keywords: Diazinon, Adsorption, Activated carbon, High pressure liquid chromatography Citation: Akbarlou Z, Alipour V, Heidari M, Dindarloo K. Adsorption of diazinon from aqueous solutions onto an activated carbon sample produced in Iran.

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“…It is an organophosphate insecticide formerly employed for the fleas control, but remains toxic for the aquatic organisms at concentration as low as 350 ng L -1 (Li et al 2002) while fetal human doses were found to be extremely high in the range (90-445 mg kg -1 ) (Zhang and Pehkonen 1999). Toxic effects of diazinon are attributed to its inhibition for the enzyme acetylcholinesterase (Shemer and Linden 2006). High diazinon residues were found in urban wastewaters and effluents from sewage treatment plants (Bailey et al 2000;Li et al 2002); hence, it is necessary to reduce its concentration before landfills.…”

Section: Introductionmentioning

confidence: 99%

“…High diazinon residues were found in urban wastewaters and effluents from sewage treatment plants (Bailey et al 2000;Li et al 2002); hence, it is necessary to reduce its concentration before landfills. In this respect, several techniques are used for the pesticides removal such as advanced oxidation processes (Zhang and Pehkonen 1999), aerobic degradation (Nandagopal and Antony 2015), nanofiltration membranes (Mehta et al 2017), ozonation (Shemer and Linden 2006) and biosorption (El Bakouri et al 2009). However, the biosorption remains one of the most used techniques (Cortina et al 2003) and has proven its effectiveness in the elimination of organic pollutants in aqueous medium (Zhang and Pehkonen 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, there is a need for the development of low-cost materials which adsorb organic pollutants. Natural biosorbents such as wood bark, peat, fly ash (Shemer and Linden 2006), acid-treated date stones (El Bakouri et al 2009) are available in large quantities and may have a great potential in the water treatment. The utilization of an abundant residual biomass, namely the apricot stone, as a raw material for activated carbons gives an additional economical interest to the technical studies.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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Degradation and by-product formation of diazinon in water during UV and UV/H2O2 treatment

Cited by 145 publications

References 14 publications

Analytical Methods for Performing Pesticide Degradation Studies in Environmental Samples

Analytical Methods for Performing Pesticide Degradation Studies in Environmental Samples

Adsorption of diazinon from aqueous solutions onto an activated carbon sample produced in Iran

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

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