Per- and polyfluoroalkyl substances in selected sewage sludge in Nigeria

Sindiku, Omotayo; Orata, Francis; Weber, Roland; Osibanjo, Oladele

doi:10.1016/j.chemosphere.2013.04.010

Cited by 63 publications

(25 citation statements)

References 29 publications

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“…The Stockholm Convention inventory guidance for PFOS includes therefore a dedicated chapter on the inventory of PFOS contaminated sites (Stockholm Convention, 2012). One challenge of the Convention implementation is that developing countries have hardly any analytical capacity for PFOS and other per-and poly-fluoro alkyl substances (PFAS) and only a limited amount of studies reported on PFOS levels in developing countries but measured in industrial countries (Guruge et al, 2005;Orata et al, 2009;Sindiku et al, 2013). To our knowledge no study has investigated PFOS/ PFAS such sites in developing countries.…”

Section: Introductionmentioning

confidence: 94%

Pathways and factors for food safety and food security at PFOS contaminated sites within a problem based learning approach

Brambilla

D’Hollander

Oliaei³

et al. 2015

Chemosphere

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Section: Introductionmentioning

confidence: 94%

Pathways and factors for food safety and food security at PFOS contaminated sites within a problem based learning approach

Brambilla

D’Hollander

Oliaei³

et al. 2015

Chemosphere

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“…They are employed in materials such as surfactants, lubricants, varnishes, pesticides and fire retardant foams, the subsequent disposal of which results in the wide detection of these compounds in various environmental media [1][2][3][4] and biological species [5][6][7]. Because of their ubiquitous occurrence, environmental persistence [8], bioaccumulation atmosphere to yield a homologous series of PFCAs through peroxy radical cross reactions.…”

Section: Introductionmentioning

confidence: 99%

Determination of fluorotelomer alcohols and their degradation products in biosolids-amended soils and plants using ultra-high performance liquid chromatography tandem mass spectrometry

Zhang

Wen

et al. 2015

Journal of Chromatography A

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a b s t r a c tDegradation of fluorotelomer alcohols (FTOHs) was recognized as an additional source of perfluorocarboxylic acids (PFCAs). Quantification of FTOHs and their degradation products can help shed light on the sources and fates of PFCAs in the environment. In this study, an analytical method was developed for the determination of 6:2 and 8:2 FTOHs, and their degradation products of poly-and perfluorinated acids, including fluorotelomer saturated and unsaturated carboxylic acids (FTCAs and FTUCAs), secondary polyfluorinated alcohols and PFCAs in biosolids-amended soils and plants using ultra-high performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The extract efficiencies of different methods including ethyl acetate and methanol (MeOH) for FTOHs and acetonitrile, MeOH, methyl tertbutyl ether (MTBE), NaOH-MeOH and NaOH-MTBE for poly-and perfluorinated acids were tested. The results showed that 6:2 and 8:2 FTOHs and their degradation products could be simultaneously and satisfactorily extracted by MeOH, cleaned up by Envi-Carb graphitized carbon and solid phase extraction, respectively, and determined by UPLC-MS/MS separately. NaOH in the extractant caused the conversion of 6:2 FTCA and 8:2 FTCA into the corresponding FTUCAs. The selected methods have matrix recoveries ranged from 52% to 102%, and detection limits of 0.01-0.46 ng/g dry weight for FTOHs and their degradation products in soil and plant. The optimized method was applied successfully to quantify FTOHs and their degradation products in two biosolids-amended soils and plants. The total concentrations of FTOHs in the soils were 44.1 ± 5.8 and 82.6 ± 7.1 ng/g, and in plants tissues 3.58 ± 0.25 and 8.33 ± 0.66 ng/g. The total concentrations of poly-and perfluorinated acids in the soils were 168.0 ± 13.2 and 349.6 ± 11.2 ng/g, and in plants tissues 78.0 ± 6.4 and 75.5 ± 5.3 ng/g.

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“…Sewage sludge was sampled in four domestic wastewater treatment plants, five industrial effluent treatment plants and one hospital wastewater treatment plant from January to April 2012 at different locations in Lagos, Oyo and Ogun State, all in South West Nigeria (Sindiku et al, 2013). Table 1 gives details of the sampled plants.…”

Section: Sewage Sludgementioning

confidence: 99%

“…The samples were air-dried, ground, and homogenized by sieving through a stainless steel 2-mm sieve, and consequently stored in a freezer (Sindiku et al, 2013). Analysis of the freezedried sewage sludge samples were carried out by the Institute of Energy and Environmental Technology (IUTA), Duisburg, Germany.…”

Section: Sewage Sludge Collection Processing and Analysismentioning

confidence: 99%

“…37%) > naproxen (27.27%) > erythromycin-A--dihydrate, erythromycin, sulfadiazine and trimetoprim (18%) >clofibrate (9%). Table 4 displays maximum concentrations measured in the six water samples from Nigeria in comparison to measured concentrations in surface water or groundwater in other African countries, and in comparison Source: Sindiku et al (2013). Key: I, industrial; D, domestic; H: Hospital: *1, positive, but below LOQ; *2, Positive using an optimised measurement method; *3, positive, corrected result.…”

Section: Watermentioning

confidence: 99%

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Quantification of pharmaceutical residues in wastewater impacted surface waters and sewage sludge from Lagos, Nigeria

Olarinmoye¹,

Bakare²,

Ugwumba³

et al. 2016

J. Environ. Chem. Ecotoxicol.

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Information on the occurrence of pharmaceuticals in the environment of Nigeria is limited, only a single publication previously on pharmaceutical occurrence in the environment of Nigeria, which measured general estrogen levels in Enugu, South-East Nigeria. In order to establish a first overview, surface water samples from six locations as well as ten sewage sludge samples from waste water treatment plants were analysed for a range of different pharmaceuticals, including antibiotics, estrogens, and lipid-lowering drugs. The results of this monitoring campaign were evaluated in comparison to published measured environmental concentrations in Africa and worldwide. In surface water samples, 12 of 37 pharmaceutical substances were detected at concentrations ranging from Limits of Detection (LOD) up to 8.84 µg/l. Four of these pharmaceuticals were found at concentrations exceeding ecotoxicological predicted no-effect concentrations (PNEC). In industrial, domestic, and hospital sewage sludge, nine different pharmaceutical substances were detected with the NSAID diclofenac present in all samples at concentrations of up to 1100 µg/kg dry weight, exceeding the highest measured concentration of 560 µg/ kg reported in sludge samples worldwide. This study proves the presence of several pharmaceuticals at relevant concentrations in the environmental matrices studied. Further, more comprehensive monitoring campaigns, especially in locations with high population density and low dilution of treated or untreated waste water in receiving streams are recommended.

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Per- and polyfluoroalkyl substances in selected sewage sludge in Nigeria

Cited by 63 publications

References 29 publications

Pathways and factors for food safety and food security at PFOS contaminated sites within a problem based learning approach

Pathways and factors for food safety and food security at PFOS contaminated sites within a problem based learning approach

Determination of fluorotelomer alcohols and their degradation products in biosolids-amended soils and plants using ultra-high performance liquid chromatography tandem mass spectrometry

Quantification of pharmaceutical residues in wastewater impacted surface waters and sewage sludge from Lagos, Nigeria

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