Concentrations and human exposure assessment of per and polyfluoroalkyl substances in farmed marine shellfish in South Africa

Abafe, Ovokeroye A.; Macheka, Linda R.; Abafe, Onajite T. Diejomaoh; Chokwe, Tlou B.

doi:10.1016/j.chemosphere.2021.130985

Cited by 31 publications

(10 citation statements)

References 43 publications

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“…Whereas only about 4.3% of the samples in this study contained imidacloprid, a recent study found imidacloprid in 27% of Irish honey samples. Prevailing landscape, land use, bee species, pesticide governance, and floral origin are some of the factors responsible for the residue profile of NEO in honey from different countries and geographical regions [25] .…”

Section: Occurrence Of Neo and Igr In Honeymentioning

confidence: 99%

“…A study by Codling et al [10] reported detection frequencies of 19%, 8%, 3%, and 38% for acetamiprid, imidacloprid, thiamethoxam, and dinotefuran, respectively, in honey from Egypt. In Australia, Ligor et al [25] reported concentrations of neonicotinoids in excess of 1350 ng g -1 for thiamethoxam in three honey samples.…”

Section: Occurrence Of Neo and Igr In Honeymentioning

confidence: 99%

“…Only 40% of the total honey consumption is produced locally with China accounting for 80% of total imported honey for the Country [24] . Honey can easily be obtained from a broad range of geographical localities, and studies have reported the presence of neonicotinoid insecticides in honey [10,13,23,25] . To protect human and environmental health, the European Union has set maximum residue levels for neonicotinoids in honey (European Data Base, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Determination and dietary risk assessment of neonicotinoid and insect growth regulators in honey

Abafe¹,

Chokwe²

2021

JEEA

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Aim: The aim of this study was to determine the presence, concentrations, dietary intake, and risk of residues of neonicotinoids (NEO) and insect growth regulators (IGR) in commercially available honey in South Africa. Methods: Sample preparation for honey was based on the “dilute and shoot” principle, followed by analysis using an internally validated ultra-high-performance liquid chromatographic coupled to tandem mass spectrometric method. Estimated daily intake and acute and chronic hazard quotients were determined to measure human exposure and health risk to NEO and IGR as well as the risk posed to honeybee. Results: NEO and IGR were detected in 50% and 21% of the 115 honey samples, respectively. The average concentration ranged 0.062-6.50 µgkg-1 and 0.479-1.644 µgkg-1 for NEO and IGR, respectively. While acetamiprid was the most detected (24.35%) NEO, imidacloprid presented the highest concentration (16.945 µg kg-1) in a sample. IGR co-occurred at variable concentrations with NEO in honey samples. The estimated daily intakes (EDI) of NEO and IGR ranged from 9.35 × 10-7 to 4.93 × 10-6 mg kg-1 bwd-1. The chronic hazard quotient (HQc) and acute hazard quotient (HQa) for NEO and IGR were considerably < 1, indicating negligible risk to human health and honeybee population. Conclusion: A UHPLC-MS/MS method was validated for the simultaneous determination of neonicotinoids and insect growth regulators in honey. Overall, the result of the present study confirms the widespread occurrence of NEO and IGR in honey consumed in South Africa. The EDIs, HQc, and HQa indicate that exposure to all target NEO and IGR via honey consumption constitutes negligible human health risk; however, the consequences of multiple routes of exposure to NEO and IGR cannot be overemphasized.

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Section: Occurrence Of Neo and Igr In Honeymentioning

confidence: 99%

Section: Occurrence Of Neo and Igr In Honeymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination and dietary risk assessment of neonicotinoid and insect growth regulators in honey

Abafe¹,

Chokwe²

2021

JEEA

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“…In our case, oysters showed negligible amounts of total PFAS. A very recent evaluation of PFAS burden in South Africa farmed shellfish 13 confirmed that at least one PFAS could be detected in every analysed sample, with highest concentrations found in mussels. In their results, PFPeA was detected at the highest concentrations.…”

Section: Discussionmentioning

confidence: 89%

“…In our case, oysters showed negligible amounts of total PFAS. A very recent evaluation of PFAS burden in South Africa farmed shellfish 13…”

Section: Discussionmentioning

confidence: 99%

Per‐ and polyfluoroalkyl substances (PFAS) determination in shellfish by liquid chromatography coupled to accurate mass spectrometry

Piva

Ioime

Dall’Ara³

et al. 2022

Drug Testing and Analysis

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Per-and polyfluoroalkyl substances (PFAS) are a numerous class of chemical compounds characterized by a C-F backbone of variable length with either a sulfonic acid group (PFSA) or a carboxylic acid (PFCA), produced for more than 70 years at industrial level. 1 PFOS and PFOA are the predominantly cited molecules of this class. Currently, these compounds are debated both at scientific and political levels due to the risks associated to exposure to legacy (PFOA, PFOS, etc.) and to emerging perfluorinated compounds (HFPO-DA or GenX, ADONA, C 6 O 4 ), introduced after the banning in the production/ import/use of PFOA and PFOS. 2,3 Studies on the bioaccumulation factor (BAF) of PFAS-that is, the degree of accumulation of a contaminant in an organism relative to its environment-correlated the length of the carbon chain (C6 > PFSA and C8 > PFCA) to higher BAF potential. On this base, the class of emerging PFAS, characterized by a shorter C-F backbone, had been considered less hazardous. Recent findings, however, confirm a lower accumulation potential in biota for short chain PFAS but similar toxicological effects as long chain counterparts. 4,5 Moreover, analyses on surface and ground waters at PFAS production plants discovered the incidence of important quantities of PFOA and PFOS branched isomers. The amounts were closely associated with the chemical reaction adopted for the production (electrochemical fluorination vs. telomerization) at the site, which consist of 22-29% of the total amount produced. 6 In the environment, branched isomers have been reported to concentrate in higher amount in soil and sediments, with less tendency to leaching, 6,7 while at biological level, they displayed different partitioning, bioaccumulation, metabolism and toxicity in living organism. 8,9 At present, studies showed as

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Predicting the dynamics of per- and polyfluoroalkyl substances in coastal regions of Africa: vulnerability index and adverse ecological pathways from remote-sensed variables

Chukwuka,

Adeogun

2024

Environ Monit Assess

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Concentrations and human exposure assessment of per and polyfluoroalkyl substances in farmed marine shellfish in South Africa

Cited by 31 publications

References 43 publications

Determination and dietary risk assessment of neonicotinoid and insect growth regulators in honey

Determination and dietary risk assessment of neonicotinoid and insect growth regulators in honey

Per‐ and polyfluoroalkyl substances (PFAS) determination in shellfish by liquid chromatography coupled to accurate mass spectrometry

Predicting the dynamics of per- and polyfluoroalkyl substances in coastal regions of Africa: vulnerability index and adverse ecological pathways from remote-sensed variables

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