Removal of chlorinated pesticides from crude vegetable oils by simulated commercial processing procedures

Smith, Keith J.; Polen, Percy B.; Vries, Diemer de; Coon, Francis B.

doi:10.1007/bf02540172

Cited by 31 publications

(7 citation statements)

References 6 publications

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“…The same observation was reported by Mounts et al [3] a few months later through their radiochemical experiments with soybean oil ( 14 C-endrin and 14 C-benzo(a)pyrene). The observation on the failure of the bleaching step in the removal of endrin confirmed the hypothesis suggested by Smith et al [2].…”

Section: Introductionsupporting

confidence: 89%

“…Over the past few decades, there were relatively few reports regarding studies on the fate of pesticide residues during vegetable oil processing. Smith et al [2] reported that chemical refining was effective in removing chlorinated pesticides (endrin, DDT, DDE, aldrin, dieldrin, heptachlor and heptachlor epoxide) in simulated commercial refining process experiments with crude soybean oil and cottonseed oil. They postulated that the removal of these pesticides was achieved by volatilization during the deodorizing step.…”

Section: Introductionmentioning

confidence: 99%

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Acephate, methamidophos and monocrotophos residues in a laboratory‐scale oil refining process

Yeoh

Chong

2009

Euro J Lipid Sci & Tech

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Malaysian Palm Oil Board,No. 6, Persiaran Institusi, Selangor, Malaysia Acephate, methamidophos and monocrotophos are insecticides used in oil palm plantations for the control of bagworms and leaf-eating caterpillars. The main purpose of this study was to determine whether the physical refining process at laboratory scale, which simulated the manufacturing process, could remove the residues of these three insecticides in crude palm oil, in the unlikely event that crude palm oil were contaminated with these organophosphorus insecticides. A series of crude palm oil samples spiked with low (0.1 mg/g) and high (1.0 mg/g) levels of these insecticides were subjected to a laboratory-scale physical oil refining process. Oil samples drawn at various stages of the refining process, namely, degumming, bleaching and deodorization, were analyzed using an in-house analytical method. The results obtained from these experiments suggest that the physical refining process is capable of effectively removing residual insecticides from crude palm oil. The final product of crude palm oil refining, the refined, bleached and deodorized palm oil, was found to have no detectable levels of acephate, methamidophos and monocrotophos.

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Section: Introductionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Acephate, methamidophos and monocrotophos residues in a laboratory‐scale oil refining process

Yeoh

Chong

2009

Euro J Lipid Sci & Tech

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“…studies on the behavior and reduction of organochlorine compounds at different refining steps (i.e. degumming, alkali refining and bleaching with activated earth) have in some cases indicated similar effects [17,18,35]. However, these authors concluded that the studied processing steps had no significant effect on the concentration of contaminants.…”

Section: Effect Of Alkali Refining and Bleachingmentioning

confidence: 88%

Optimization of activated carbon‐based decontamination of fish oil by response surface methodology

Oterhals

Solvang

Nortvedt

et al. 2007

Euro J Lipid Sci & Tech

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The effect of activated carbon (AC) adsorption on the reduction of persistent organic pollutants (POP) in fish oil was studied based on response surface methodology at a 5-g/kg AC inclusion level. Pretreatment of the oil by alkali refining and bleaching increased the POP levels. The tested process variables (contact time and temperature) affected the AC adsorption rate and significant first-and second-order response models could be established. Polychlorinated dibenzo-pdioxins and dibenzofurans (PCDD/F) showed a very rapid adsorption behavior and the concentration and toxic equivalent (TEQ) level could be reduced by 99%. Adsorption of dioxin-like polychlorinated biphenyls (DL-PCB) was less effective and depended on ortho substitution, i.e. non-ortho PCB were adsorbed more effectively than mono-ortho PCB with a maximum of 87 and 21% reduction, respectively, corresponding to a DL-PCB-TEQ reduction of 73%. A common optimum for both PCDD/F and DL-PCB adsorption could not be identified. AC treatment had no effect on the level of polybrominated diphenyl ether flame retardants. The differences in adsorption patterns may be explained based on molecular conformation. No change in oil quality could be observed based on oxidation parameters. Compliance with present PCDD/F and DL-PCB legislation levels in fish oil can be achieved based on AC adsorption.

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“…The byproduct of the reaction are hydrogen chloride and low molecular weight hydrocarbon [53]. Endrin and some other organochlorine pesticides have been successfully degraded by hydrogenation, followed by deodorization [40]. Furthermore, the research conducted by Addisson and Ackman [7] removed polychlorinated biphenyl, DDT and dieldrin from margarine by dehydrogenation followed by deodorization.…”

Section: Methods For Removal Of Organochlorine Pesticides From the Environmentmentioning

confidence: 99%

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

2020

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The amount of organochlorine pesticides in soil and water continues to increase; their presence has surpassed maximum acceptable concentrations. Thus, the development of different removal strategies has stimulated a new research drive in environmental remediation. Different techniques such as adsorption, bioremediation, phytoremediation and ozonation have been explored. These techniques aim at either degrading or removal of the organochlorine pesticides from the environment but have different drawbacks. Heterogeneous photocatalysis is a relatively new technique that has become popular due to its ability to completely degrade different toxic pollutants—instead of transferring them from one medium to another. The process is driven by a renewable energy source, and semiconductor nanomaterials are used to construct the light energy harvesting assemblies due to their rich surface states, large surface areas and different morphologies compared to their corresponding bulk materials. These make it a green alternative that is cost-effective for organochlorine pesticides degradation. This has also opened up new ways to utilize semiconductors and solar energy for environmental remediation. Herein, the focus of this review is on environmental remediation of organochlorine pesticides, the different techniques of their removal from the environment, the advantages and disadvantages of the different techniques and the use of specific semiconductors as photocatalysts.

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Removal of chlorinated pesticides from crude vegetable oils by simulated commercial processing procedures

Cited by 31 publications

References 6 publications

Acephate, methamidophos and monocrotophos residues in a laboratory‐scale oil refining process

Acephate, methamidophos and monocrotophos residues in a laboratory‐scale oil refining process

Optimization of activated carbon‐based decontamination of fish oil by response surface methodology

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

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