Dissolved PAHs impacted by air-sea interactions: Net volatilization and strong surface current transport in the Eastern Indian Ocean

Liu, Mengyang; Zheng, Haowen; Chen, Meng; Liang, Junhua; Duan, Mengshan; Du, Huihong; Chen, Mian; Ke, Hongwei; Zhang, Kai; Cai, Minggang

doi:10.1016/j.jhazmat.2022.128603

Cited by 17 publications

(5 citation statements)

References 58 publications

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“…The filter membrane of Chl-a was placed into a 10 mL brown glass tube and then extracted with 5 mL acetone with a volume fraction of 90% in the dark at 4°C for 24 h. The content of Chl-a was (Peng et al, 2015;Wei et al, 2019;Guo et al, 2021;Liu et al, 2022;Ikhsani et al, 2023).…”

Section: Analytical Proceduresmentioning

confidence: 99%

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Spatial distribution and environmental/biological co-regulation mechanism of dimethyl sulfur compounds in the eastern Indian Ocean

Peng,

Fan,

Guo

et al. 2024

Front. Mar. Sci.

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Dimethyl sulfur compounds including dimethylsulfoniopropionate (DMSP), dimethyl sulfide (DMS), and dimethyl sulfoxide (DMSO), play a crucial part in global sulfur cycling. The eastern Indian Ocean (EIO), characterized by its remarkable diversity of biomes and climate dynamics, is integral to global climate regulation. However, the regulation mechanism of DMS (P, O) in the EIO remains to be elucidated in detail. This paper presented a field survey aimed at investigating the spatial distribution of DMS (P, O) and their relationships with environmental and biological factors in the EIO. The surface concentrations of DMS, DMSPt, and DMSOt varied from 0.07 to 7.37 nmol/L, 0.14 to 9.17 nmol/L, and 0.15 to 3.32 nmol/L, respectively, and their distributions are attributed to high Chl-a concentration near Sri Lanka and the influence of ocean currents (Wyrtki jets, Bay of Bengal runoff). Higher concentrations of DMS (P) and DMSOt were predominantly observed in water columns shallower than 75m and deeper than 75m deep, respectively. The monthly DMS fluxes in the study area peaked in August. Temperature and Dissolved Silica Index (DSI) were the key environmental determinants for DMS distribution, while nitrate (NO3-) was the primary factor for both DMSPt and DMSOt. In terms of biological factors, Prochlorococcus and Synechococcus were significant contributors to DMS (P, O) dynamics. Synechococcus was the dominant influence on the DMS source and DMSPt sink, whereas Prochlorococcus primarily consumed DMSOt. Furthermore, the structural equation modeling (SEM) revealed the relationship between DMS, DMSPt, DMSOt, and the key environmental/biological factors, as well as among them, and together they formed a co-regulatory network in the EIO. This contributes significantly to the advancement of global ecosystem models for DMS (P, O).

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Section: Analytical Proceduresmentioning

confidence: 99%

“…The thickness of the line indicates the corresponding circulation strength. Black triangles represent the SA section and red triangles represent the SB section(Peng et al, 2015;Wei et al, 2019;Guo et al, 2021;Liu et al, 2022;Ikhsani et al, 2023).…”

mentioning

confidence: 99%

Spatial distribution and environmental/biological co-regulation mechanism of dimethyl sulfur compounds in the eastern Indian Ocean

Peng,

Fan,

Guo

et al. 2024

Front. Mar. Sci.

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“…However, the seasonal variabilities should be further examined. For instance, the spring/ autumn EUC would result in an advection of DOC or an input of additional DOC (Liu et al, 2022), and consequently change the carbon export in the w-CIO (Jana et al, 2015). In the summer or autumn, the widespread freshwater might bring terrestrial OM into the BoB (Jana et al, 2015), which potentially increase the export.…”

Section: Different Dom Degradation Efficiency In the Euphotic Waters ...mentioning

confidence: 99%

Different behaviors of organic matter under physical-biological controls in the eastern Indian Ocean

Zhang

et al. 2023

Front. Mar. Sci.

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Marine organic matter (OM) pools are the key to understanding biogeochemical cycles and carbon storage, especially under ongoing ocean warming. The tropical eastern Indian Ocean (IO) is ideal for unraveling marine OM pools for being one of the least understood ocean basins in terms of its complex physical and biogeochemical dynamics. So far, OM transformation and export remain underexplored and enigmatic in the IO. Here, we integrated in situ observations and incubation experiments in the Central IO (CIO) and Bay of Bengal (BoB). A large OM pool was found in the CIO, where we emphasized the prominent contribution of production in the deep euphotic layer, with physical forcing seasonally playing a supporting role. The dissolved organic matter (DOM)-degradation experiment results revealed high efficiency of in situ DOM consumption in the BoB, whereas dark carbon fixation by ammonia-oxidizing microorganisms was considered an alternative strategy in the euphotic CIO. Water mixing was found to highly influence the OM pools in the mesopelagic waters in the tropical eastern IO, but active microbial respiration could also regulate the OM degradation in the CIO. Our results emphasized the heterogeneity of OM pools between the BoB and CIO, and stated their different regulators of carbon reservoir considering an ocean warming scenario.

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“…Physiological properties of soil and PAH and environmental factors can influence the volatilization rate. The PAHs with high molecular weight have high vapor pressure and lower half-life, resulting in a high volatilization rate (Liu et al, 2022). Also, PAH volatilization in soil depends on soil moisture and clay, and organic matter contents and air temperature, wind & Mansour, 2016;Huang et al, 2018).…”

Section: Transportation Of Pahsmentioning

confidence: 99%

A short review on polycyclic aromatic hydrocarbon contamination

Derafsh

Matin

Hassani

2022

Acta Horticulturae Et Regiotecturae

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Polycyclic aromatic hydrocarbons (PAHs) are prevalent environmental pollutants produced by incomplete combustion of biomass including fossil fuels, wood, and coal. The majority of PAHs in the environment emits from anthropogenic activities, while some are released from naturally occurring phenomena, such as volcanic activities. Consequently, PAHs concentration is significantly higher in industrialized and urban areas than in rural areas. Human exposure to PAHs results in many health problems, depending on the PAH concentration type, time and method of exposure, and individual health status. The PAHs readily transport between soil, water, and the atmosphere. Four main processes involved in PAH transportation are volatilization, absorption, leaching, and erosion. However, many factors affect PAHs‘ transportation, including PAHs‘ molecular weight, vapor pressure, soil matrix, climate condition, and topography. Various remediation techniques have experimented in order to PAHs remove from the natural environment. Bioremediation, in particular, is an optimistic way that can be done by bacteria, fungi, and alga.

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Dissolved PAHs impacted by air-sea interactions: Net volatilization and strong surface current transport in the Eastern Indian Ocean

Cited by 17 publications

References 58 publications

Spatial distribution and environmental/biological co-regulation mechanism of dimethyl sulfur compounds in the eastern Indian Ocean

Spatial distribution and environmental/biological co-regulation mechanism of dimethyl sulfur compounds in the eastern Indian Ocean

Different behaviors of organic matter under physical-biological controls in the eastern Indian Ocean

A short review on polycyclic aromatic hydrocarbon contamination

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