Kinetic studies of catalytic photodegradation of chlorpyrifos insecticide in various natural waters

Muhamad, Sulaiman G.

doi:10.1016/j.arabjc.2010.02.009

Cited by 64 publications

(18 citation statements)

References 21 publications

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“…It is a rapidly growing field of research and has been studied in different types of natural waters such as lake, river, and groundwater as well as in distilled and drinking water under natural sun light and simulated irradiation sources (Muhamad 2010). It simply denotes the acceleration of photoreaction with the help of a catalyst (Table 3).…”

Section: Physical and Chemical Remediation Strategiesmentioning

confidence: 99%

Chlorpyrifos: pollution and remediation

2015

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The widespread use of pesticides in modern agriculture is of increasing concern due to environmental contamination and subsequent biodiversity loss. Chlorpyrifos is a toxic organophosphate pesticide. Repeated applications of chlorpyrifos modify the soil microbial community structure and pose potential health risks to the other nontargets. Chlorpyrifos has been reported as the second most commonly detected pesticide in food and water. Extensive use of chlorpyrifos in agriculture and persistence in the environment have raised public concern and demand for safe technologies to overcome the pollution and toxicity problems. Here, we review pollution and toxicity issues associated with chlorpyrifos use and discuss strategies to solve pesticide contamination. Chlorpyrifos, previously shown to be resistant to enhanced degradation, has now been proved to undergo enhanced microbe-mediated decay. Here, special emphasis is given to degradation methods such as ozonation, Fenton treatment, photodegradation, and advanced oxidation processes along with microbial degradation. Finally, we focus on degradation process at enzyme and molecular levels which will enable us to elucidate the exact degradative pathway involved in biodegradation.

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Section: Physical and Chemical Remediation Strategiesmentioning

confidence: 99%

Chlorpyrifos: pollution and remediation

2015

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“…But, above certain dose clustering of catalyst particles takes place and thus causing a decrease in the number of active sites on its free surface. The decrease in degradation is thus due to the decrease in surface area of catalyst due to aggregation of TiO 2 [31][32][33]. Another reason is with high dose of photocatalyst, turbidity of the suspension increases, causing decrease in the penetration of UV light and hence photoactivated volume of suspension decreases [34].…”

Section: Effect Of Catalyst Dosementioning

confidence: 99%

Photocatalytic degradation of monocrotophos and chlorpyrifos in aqueous solution using TiO2 under UV radiation

Amalraj

Pius

2015

Journal of Water Process Engineering

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“…The presence of inorganic ions was found to influence the kinetics and mechanism of the catalytic degradation of organic pollutant (Muhamad 2010). The uptake of pesticides from wastewaters is different from that of a simple pesticide in solution.…”

Section: Effect Of Co-existing Inorganic Ionsmentioning

confidence: 99%

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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Kinetic studies of catalytic photodegradation of chlorpyrifos insecticide in various natural waters

Cited by 64 publications

References 21 publications

Chlorpyrifos: pollution and remediation

Chlorpyrifos: pollution and remediation

Photocatalytic degradation of monocrotophos and chlorpyrifos in aqueous solution using TiO2 under UV radiation

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

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