A baseline study on polycyclic aromatic hydrocarbons (PAHS) in surface Sediments, Kerala Estuaries, west coast of India

Radhakrishnan, K.; Prakasheswar, P; Pradhap, D.; Akramkhan, N.; Rajkumar, A.; Maheswaran, Subbiah; Hussain, S. M.; Gandhi, K. Sanjai; Krishnakumar, S.

doi:10.1016/j.totert.2023.100055

“…Sediment samples were pretreated using the EPA 3540 method recommended by US EPA (Radhakrishnan et al 2023;Shi et al 2023). First, take 10 g of soil and sediment samples, mix each of them with 10 g of anhydrous sodium sulfate, wrap the mixed samples with filter papers (which have been extracted for 72 h with dichloromethane), and add 5 recovery indicators to the samples.…”

Section: Study Area and Sample Collectionmentioning

confidence: 99%

The sources, diffusion, and health risks of polycyclic aromatic hydrocarbons in water and sediment of a typical underground river in South China

Lu,

Chen,

Zou

et al. 2024

Environ Earth Sci

2

0

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Underground rivers serve as the primary source of drinking water in the karst area in South China and support their development. However, the aquifer structure of the karst region makes it easy for PAHs (polycyclic aromatic hydrocarbons) to enter underground rivers, which causes heavy pollution and affects water quality and safety. This study chose the Qingshuiquan underground river in Nanning City as a representative to reveal the sources, diffusion, and health risks of PAHs in water and sediment of underground rivers. The results showed that the ∑16PAHs concentration ranges in groundwater and sediment were 294.44-489.91 ng/L and 380.13-1141.97 ng/g respectively. From the upstream to the downstream, PAH concentrations increased, and the proportion of PAHs with lower rings decreased. PAHs came from three sources: the high-temperature combustion of grass, wood, and coal in the upper reaches, petroleum in the middle reaches, and coal and oil combustion in the lower reaches. As ring numbers of PAHs and organic carbon content increased, PAHs were more likely to disperse into sediment. Sediment turned from source to sink, and groundwater from sink to source. PAHs in groundwater posed only carcinogenic health risks and zero non-carcinogenic health risks, with adults suffering from higher risks than children, and dermal contacts riskier than ingestion. The levels of carcinogenic health risks differed spatially, with risks in the downstream significantly higher than those in the midstream and upstream. PAH monomers such as BaP and DaA require close attention. These results can provide scientific evidence for POPs (persistent organic pollutants) prevention and control in the karst water environment.

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Marine pollution and ecological degradation—issues and challenges

Krishnakumar,

Satheesh Herbert Singh,

Nallusamy

et al. 2024

Environ Sci Pollut Res

1

0

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The Sources, Diffusion, and Health Risks of Polycyclic Aromatic Hydrocarbons in Water and Sediment of a Typical Underground River in South China

Lu,

Chen,

Zou

et al. 2023

Preprint

0

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Underground rivers serve as the primary source of drinking water in the karst area in South China and support their development. However, the aquifer structure of the karst region makes it easy for PAHs (polycyclic aromatic hydrocarbons) to enter underground rivers, which causes heavy pollution and affects water quality and safety. This study chose the Qingshuiquan underground river in Nanning City as a representative to reveal the sources, diffusion, and health risks of PAHs in water and sediment of underground rivers. The results showed that the ∑16PAHs concentration ranges in groundwater and sediment were 294.44-489.91 ng/L and 380.13-1141.97 ng/g respectively. From the upstream to the downstream, PAH concentrations increased, and the proportion of PAHs with lower rings decreased. PAHs came from three sources: the high-temperature combustion of grass, wood, and coal in the upper reaches, petroleum in the middle reaches, and coal and oil combustion in the lower reaches. As ring numbers of PAHs and organic carbon content increased, PAHs were more likely to disperse into sediment. Sediment turned from source to sink, and groundwater from sink to source. PAHs in groundwater posed only carcinogenic health risks and zero non-carcinogenic health risks, with adults suffering from higher risks than children, and dermal contacts riskier than ingestion. The levels of carcinogenic health risks differed spatially, with risks in the downstream significantly higher than those in the midstream and upstream. PAH monomers such as BaP and DaA require close attention. These results can provide scientific evidence for POPs (persistent organic pollutants) prevention and control in the karst water environment.

show abstract

A baseline study on polycyclic aromatic hydrocarbons (PAHS) in surface Sediments, Kerala Estuaries, west coast of India

Cited by 3 publications

References 66 publications

The sources, diffusion, and health risks of polycyclic aromatic hydrocarbons in water and sediment of a typical underground river in South China

The sources, diffusion, and health risks of polycyclic aromatic hydrocarbons in water and sediment of a typical underground river in South China

Marine pollution and ecological degradation—issues and challenges

The Sources, Diffusion, and Health Risks of Polycyclic Aromatic Hydrocarbons in Water and Sediment of a Typical Underground River in South China

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