Spatial characteristics and risk assessment of polychlorinated biphenyls in surficial sediments around crude oil production facilities in the Escravos River Basin, Niger Delta, Nigeria

Iwegbue, Chukwujindu M. A.; Bebenimibo, Ernest; Tesi, Godswill O.; Egobueze, Francis E.; Martincigh, Bice S.

doi:10.1016/j.marpolbul.2020.111462

Cited by 31 publications

(6 citation statements)

References 54 publications

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“…2 and Table S4), ranging from 18.7 to 1350 ng g − 1 . The average concentration (521 ng g − 1 ) was comparable to the Ase River polluted by e-waste in Nigeria (Irerhievwie et al, 2020); higher than those polluted by industrial and urban emission (Table S7), such as the Lerma River in Mexico, the Delaware River in the USA, the River Clyde in the UK, Scarp River in France, the Brisbane River in Australia, and rivers in Shanghai (Brito et al, 2015;Net et al, 2015;Anim et al, 2017;Vane et al, 2017;Kim et al, 2018;Qadeer et al, 2019;Yang et al, 2019), heavily higher than the Chaobai River (drinking water) and Jiulong River (wetland) in China (Zhang et al, 2019;Yang et al, 2020); but lower than the Escravos River in Nigeria and the Hudson River (2500 ng g − 1 ) in the USA (Chitsaz et al, 2020;Iwegbue et al, 2020). Surficial sediments from the Escravos River were Fig.…”

Section: Pcbs Distribution In Basin Soils River and Marine Sedimentsmentioning

confidence: 99%

Spatial distribution and ecological risks of polychlorinated biphenyls in a river basin affected by traditional and emerging electronic waste recycling in South China

Shi

Huang

Sanganyado

et al. 2022

Ecotoxicology and Environmental Safety

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Section: Pcbs Distribution In Basin Soils River and Marine Sedimentsmentioning

confidence: 99%

Spatial distribution and ecological risks of polychlorinated biphenyls in a river basin affected by traditional and emerging electronic waste recycling in South China

Shi

Huang

Sanganyado

et al. 2022

Ecotoxicology and Environmental Safety

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“…[1][2][3][4][5][6][7] The attributes of DMD, notably its high contrast and rapid refresh rate, coupled with its ability to realize photomasks digitally, have positioned it as an indispensable tool in various applications. These span from printed circuit boards 8,9) and MEMS [10][11][12][13][14][15] to micro-nano optical elements [16][17][18][19][20][21] and 3D lithography. [22][23][24][25] Notwithstanding its manifold advantages, one persistent challenge has been the pattern distortion inherent in the lithographic process.…”

Section: Introductionmentioning

confidence: 99%

DMD maskless lithography optimization based on an improved genetic algorithm

Huang,

Tang,

Ren

et al. 2024

Jpn. J. Appl. Phys.

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In this paper, an efficient mask optimization method is proposed based on the improved genetic algorithm (GA), which can obviously enhance the performance of digital micromirror device (DMD) maskless lithography. Through meticulous exploration and comparison of multiple optimization techniques, the simulated annealing improved genetic algorithm (SA-GA) method was identified as the most effective improved algorithm, which notably improves the lithography simulation outcomes to achieve mask optimization objectives. Results demonstrated the effectiveness of this method, with the improvement percentage improved by up to 88% and to 75% for circular and heart-shaped images compared to traditional Hopkins lithography simulation. The remarkable effect of improved GA in enhancing the quality of DMD digital lithography shows that it will have great potential in micro-fabrication applications, and paves the way for the realization of high-fidelity and efficient DMD digital lithography technology, which has star versatility and adaptability in the field of microelectronics manufacturing.

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“…Since their commercial production began in 1930, PCBs have primarily been used as coolants, lubricants, and uids in electrical transformers and capacitors under the trade names Aroclor, Clophen, Fenclor, Kanechlor, Phenoclor, and Sovolin, among others ( Igbo et al, 2018: Takasuga et al, 2006. PCBs are widespread synthetic organic pollutants that are capable of exhibiting eco-toxicity effects far away from their point of emission due to their ability to undergo long distance migration (Iwegbue et al, 2020a;Ololade et al, 2021). These compounds are environmentally stable (i.e.…”

Section: Introductionmentioning

confidence: 99%

Assessment Of Level Of Polychlorinated Biphenyls (PCBs) In Soil And Edible Crops From River Ala Floodplain In Akure

Abe,

Aiyesanmi,

Ojonukpe

2024

Preprint

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Flooding is one significant process that contributes to the movement of soil and sediments with the pollutants present in it along the river bank. With higher velocities of water, flooding can take contamination downstream. The soil, edible crops (rice and vegetables) samples were collected from Ala river floodplain in Ondo State and analyzed for their physico-chemical characteristics and level of Polychlorinated biphenyls present. The concentrations of nineteen (19) polychlorinated biphenyls (PCBs) were analyzed in soils collected at nine different sites along the floodplain and edible crops collected from six of the sites/ location using Gas Chromatography Mass Spectrometer (GC-MS) to determine the level of contamination of the floodplain and potential risks to the ecosystem and humans. The Ʃ-19 PCB concentrations in the floodplain soils varied between not detected (nd) -60 µg kg −1, n.d – 60 µg kg −1 in vegetables and not detected to 80 µg kg −1 in rice across different locations. Higher concentration values were recorded in rice which suggests plants uptake and bioaccumulation potentials.The concentration of di to tetra homologues are more predominant in the samples. The concentration is lower than the value of permissible limit 2mg kg-1 recommended by Canadian Soil Quality Guideline (CSQG) and United States Environmental Protection Agency (US EPA). Dioxin-like PCBs were not detected

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Spatial characteristics and risk assessment of polychlorinated biphenyls in surficial sediments around crude oil production facilities in the Escravos River Basin, Niger Delta, Nigeria

Cited by 31 publications

References 54 publications

Spatial distribution and ecological risks of polychlorinated biphenyls in a river basin affected by traditional and emerging electronic waste recycling in South China

Spatial distribution and ecological risks of polychlorinated biphenyls in a river basin affected by traditional and emerging electronic waste recycling in South China

DMD maskless lithography optimization based on an improved genetic algorithm

Assessment Of Level Of Polychlorinated Biphenyls (PCBs) In Soil And Edible Crops From River Ala Floodplain In Akure

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