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Fu Y, Zhang R, Rong S, Wu Y, Wu Y, Ya M. A methodological review of compound-specific radiocarbon analysis for polycyclic aromatic hydrocarbons in environmental matrices. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 350:124050. [PMID: 38677454 DOI: 10.1016/j.envpol.2024.124050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 04/29/2024]
Abstract
Identifying the sources of polycyclic aromatic hydrocarbons (PAHs) in complex environmental matrices is essential for understanding the impact of combustion-related human activities on the environment. Since the turn of the century, advances in analytical capability and accuracy of accelerator mass spectrometry (AMS) have made it possible to accurately determine the source apportionment of PAHs based on their radiocarbon (14C) mass conservation. This also allows us to trace the environmental transport processes of PAHs from the perspective of molecular 14C. However, natural environmental matrices have very low concentrations of PAHs (ppb to ppm level). To meet the requirements of carbon weight for 14C measurement by AMS, trace PAHs in complex environmental matrices must be enriched thousands of times, and then higher purity individual PAH molecules should be obtained through a series of complex purification procedures. Therefore, the technical difficulty is the main challenge in expanding the application of compound-specific 14C analysis in environmental science. This article reviews the detailed pretreatment procedures for 14C measurement of specific PAHs, including sample enrichment, extraction and purification of aromatic components, preparation of compound-specific PAHs by preparative capillary gas chromatography, graphitization of samples with ultra-small carbon content, and relevant quality control and assurance procedures. This study aims to help environmental geoscientists understand the technical process of 14C analysis of PAHs and inspire new scientific questions related to environmental science. To our knowledge, this is the first comprehensive review of the technical method of compound-specific 14C analysis for PAHs.
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Affiliation(s)
- Yu Fu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China
| | - Rui Zhang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China
| | - Shaopeng Rong
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Yuling Wu
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Ying Wu
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China
| | - Miaolei Ya
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China.
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Cao Y, Wang J, Xin M, Wang B, Lin C. Spatial distribution and partition of polycyclic aromatic hydrocarbons (PAHs) in the water and sediment of the southern Bohai Sea: Yellow River and PAH property influences. WATER RESEARCH 2024; 248:120873. [PMID: 37980864 DOI: 10.1016/j.watres.2023.120873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 11/01/2023] [Accepted: 11/13/2023] [Indexed: 11/21/2023]
Abstract
The marginal Bohai Sea, connected to the northwestern Pacific Ocean, is threatened by human activity. The Yellow River, the second largest river in China, drains large amounts of water, silts, and polycyclic aromatic hydrocarbons (PAHs) into the southern Bohai Sea; however, to what extent the Yellow River inputs influence the spatial distributions and partitions of PAHs in the southern Bohai Sea is not well known. Therefore, this study collected surface water, bottom water, and sediment samples from the southern Bohai Sea and analyzed them to examine the spatial distributions and partitions of 15 priority PAHs. The results showed that PAH concentrations ranged from 26.9 to 50.1 ng L-1 in surface water, 18.8 to 44.1 ng L-1 in bottom water, and 7.4 to 143.9 ng g-1 in sediment, with higher proportions of four-, five-, and six-ring PAHs in sediment than in water. PAH inputs from the Yellow River and sea coastal currents determined the spatial distribution of PAH concentrations in water and sediment, with an overall decrease from the estuary to the southeast. However, the solid dilution effect of input silts from the Yellow River and the liquid dilution effect of water from the Yellow River and Yellow Sea led to lower PAH concentrations in the water and sediment of the southern Bohai Sea than those in other areas of the Bohai Sea. PAH exchange between the atmosphere and seawater led to significantly higher individual PAH concentrations (except for acenaphthylene) in the surface water than in the bottom water, with ratios significantly related to the PAH n-octanol-water partition coefficient, organic carbon-water partition coefficient, and Henry's law constants. These parameters also determined PAH partitioning between the bottom water and sediment. Individual and total PAH concentrations in the sediment were significantly correlated with organic matter, clay, and silt contents. Therefore, the partitions and spatial distributions of PAHs in the southern Bohai Sea comprehensively depend on PAH properties, PAH inputs from the Yellow River and the atmosphere, sea currents, and seawater and sediment properties. The ecological risks posed by individual PAHs in both water and sediment were negligible or acceptable.
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Affiliation(s)
- Yuanxin Cao
- Beijing Normal University, Beijing 100875, China; School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, 223300, China
| | - Jing Wang
- Beijing Normal University, Beijing 100875, China.
| | - Ming Xin
- The First Institute of Oceanography, Ministry of Natural Resources, 6 Xianxialing Road, Qingdao 266061, China
| | - Baodong Wang
- The First Institute of Oceanography, Ministry of Natural Resources, 6 Xianxialing Road, Qingdao 266061, China
| | - Chunye Lin
- Beijing Normal University, Beijing 100875, China
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Liu M, Zheng H, Cai M, Leung KMY, Li Y, Yan M, Zhang Z, Zhang K, Chen M, Ke H. Ocean Stratification Impacts on Dissolved Polycyclic Aromatic Hydrocarbons (PAHs): From Global Observation to Deep Learning. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:18339-18349. [PMID: 37651694 DOI: 10.1021/acs.est.3c03237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Ocean stratification plays a crucial role in many biogeochemical processes of dissolved matter, but our understanding of its impact on widespread organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs), remains limited. By analyzing dissolved PAHs collected from global oceans and marginal seas, we found different patterns in vertical distributions of PAHs in relation to ocean primary productivity and stratification index. Notably, a significant positive logarithmic relationship (R2 = 0.50, p < 0.05) was observed between the stratification index and the PAH stock. To further investigate the impact of ocean stratification on PAHs, we developed a deep learning neural network model. This model incorporated input variables determining the state of the seawater or the stock of PAHs. The modeled PAH stocks displayed substantial agreement with the observed values (R2 ≥ 0.92), suggesting that intensified stratification could prompt the accumulation of PAHs in the water column. Given the amplified effect of global warming, it is imperative to give more attention to increased ocean stratification and its impact on the environmental fate of organic pollutants.
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Affiliation(s)
- Mengyang Liu
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, College of the Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
- State Key Laboratory of Marine Pollution, and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, P. R. China
| | - Haowen Zheng
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, College of the Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
| | - Minggang Cai
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, College of the Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
| | - Kenneth M Y Leung
- State Key Laboratory of Marine Pollution, and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, P. R. China
| | - Yifan Li
- Harbin Institute of Technology, Harbin 150090, P. R. China
| | - Meng Yan
- State Key Laboratory of Marine Pollution, and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, P. R. China
| | - Zifeng Zhang
- Harbin Institute of Technology, Harbin 150090, P. R. China
| | - Kai Zhang
- State Key Laboratory of Marine Pollution, and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, P. R. China
| | - Meng Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, College of the Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
| | - Hongwei Ke
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, College of the Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
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Ye J, Zheng H, Liu M, Tanli Y, Qi H, Jing L, Huang J, Hossain KB, Ke H, Wang C, Wang S, Cai M. Upwelling impact and lateral transport of dissolved PAHs in the Taiwan Strait and adjacent South China Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 895:165159. [PMID: 37385490 DOI: 10.1016/j.scitotenv.2023.165159] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/22/2023] [Accepted: 06/25/2023] [Indexed: 07/01/2023]
Abstract
The spatial distribution and depth profile of dissolved polycyclic aromatic hydrocarbons (PAHs) were investigated in the western Taiwan Strait (TWS) and northeastern South China Sea (SCS) during the southwest monsoon for a comprehensive study of spatial distribution, potential sources, upwelling, and lateral PAHs transport flux to assess the impacts of oceanic processes. The concentrations of ∑14PAHs were 33 ± 14 ng L-1 and 23 ± 11 ng L-1 in western TWS and northeastern SCS, respectively. A minor difference in potential sources in different areas was shown in principle component analysis results, which illustrated mixed sources (petrogenic and pyrogenic) in western TWS and petrogenic sources in northeastern SCS. An "enrichment in surface or deep but depletion in medium water" distribution pattern of PAHs depth profile during summertime was observed in Taiwan Bank, which was potentially influenced by the upwelling. The greatest lateral ∑14PAHs transport flux was found along the Taiwan Strait Current area (43.51 g s-1), followed by those along South China Sea Warm Current and Guangdong Coastal Current areas. Though the oceanic response to PAHs varied relatively slowly, the ocean current was a less-dominant pathway for PAHs exchange between the SCS and the East China Sea (ECS).
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Affiliation(s)
- Jiandong Ye
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Haowen Zheng
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Mengyang Liu
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; State Key Laboratory of Marine Pollution, City University of Hong Kong, 999077, Hong Kong, China
| | - Yina Tanli
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Huaiyuan Qi
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Lingkun Jing
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Jiajin Huang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Kazi Belayet Hossain
- Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China; College of Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Hongwei Ke
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Chunhui Wang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Shanlin Wang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China.
| | - Minggang Cai
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; Coastal and Ocean Management Institute, Xiamen University, Xiamen 361102, China; College of Environment and Ecology, Xiamen University, Xiamen 361102, China.
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Ya M, Wu Y, Wang X, Wei H. Fine particles and pyrogenic carbon fractions regulate PAH partitioning and burial in a eutrophic shallow lake. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120211. [PMID: 36152709 DOI: 10.1016/j.envpol.2022.120211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/30/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Aquatic particles and organic carbon (OC) regulate the occurrence and transport of hydrophobic organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) in water-suspended particle-sediment interfaces. Conventional studies on the mechanisms regulating the relationships between PAHs and total particles/OC have ignored micro-scale regulatory factors such as particle size and OC composition. Field research in the eutrophic shallow Lake Taihu, China, revealed that the fine particle fractions 2.7-10 μm in diameter had stronger PAH adsorption capacity and significantly regulated PAH particle size distribution and water-particle partitioning. Selective PAH biodegradation by planktonic microorganisms probably significantly weakened the capacity of the coarse fractions to regulate PAHs. OC fragments at different temperature gradients had markedly different influences on the particle size distribution of PAHs. High-temperature pyrogenic OC fractions (part of black carbon) were the principal OC regulatory factors for medium-to high-molecular-weight PAHs. However, the OC fragments did not directly affect the particle distribution of low-molecular-weight PAHs. During particle deposition and burial, microbial PAH utilization and efficiency probably regulated the burial potential of various hydrophobic PAH species. Biodegradation of relatively less hydrophobic PAHs with octanol-water partition coefficients (log Kow) < 5.8 showed an increasing trend with decreasing PAH hydrophobicity. Biological pump action of the relatively higher hydrophobic PAH species (log Kow > 5.8) showed a decreasing trend with increasing PAH hydrophobicity. The discoveries of the present work further clarified the mechanisms of PAH partitioning and burial in a eutrophic shallow lake and collectively provides a valuable reference for modeling the transport and dispersal mechanisms of hydrophobic, particle-bound organic contaminants in other aquatic ecosystems.
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Affiliation(s)
- Miaolei Ya
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China.
| | - Yuling Wu
- School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Hengchen Wei
- School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China
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Wang C, Thakuri B, Roy AK, Mondal N, Chakraborty A. Phase partitioning effects on seasonal compositions and distributions of terrigenous polycyclic aromatic hydrocarbons along the South China Sea and East China Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154430. [PMID: 35276140 DOI: 10.1016/j.scitotenv.2022.154430] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/19/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) have posed serious risk to marine ecosystems due to their carcinogenic properties, and persistence in the environment and elevated bioaccumulation. It, therefore, becomes essential to examine spatial distribution, composition, and sources of PAHs. In this study, we have examined these PAH variations in the South China Sea (SCS) and East China Sea (ECS), that are experiencing rapid population and economic growth by the surrounding developing countries. It revealed high seasonal variations that significantly differ between dissolved and particulate PAHs concentrations. Spatial variations of PAHs across sites remain relatively insignificant. Persistently high particulate concentrations of the Naphthalene (Nap) were observed, whereas the dissolved concentrations of Fluorene (Flu) and Phenanthrene (Phen) remained prevalent across all the seasons. The result of non-metric multidimensional scaling (NMDS) strongly reflects the weak dispersions of PAHs across the seasons and the contrasting effects of the phase partitioning. Principal component analysis indicates that the primary source of PAH contamination is coal tar or petroleum distillation. However, estimated risk quotient (RQ) values of both the dissolved and particulate PAHs in all the seasons are far below the high-risk levels, while dissolved PAHs displayed relatively higher values. This study signifies the importance of phase petitioning for PAHs monitoring and potential risk assessments.
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Affiliation(s)
- Ce Wang
- School of Energy and Environment, Southeast University, Nanjing, 210096, PR China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, 210096, PR China.
| | - Bikash Thakuri
- Department of Mathematics, School of Physical Sciences, Sikkim University, Gangtok 737102, Sikkim, India
| | - Amit Kumar Roy
- Department of Mathematics, School of Physical Sciences, Sikkim University, Gangtok 737102, Sikkim, India
| | - Nitish Mondal
- Department of Anthropology, School of Human Sciences, Sikkim University, Gangtok 737102, Sikkim, India
| | - Amit Chakraborty
- Department of Mathematics, School of Physical Sciences, Sikkim University, Gangtok 737102, Sikkim, India.
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Method Development for Low-Concentration PAHs Analysis in Seawater to Evaluate the Impact of Ship Scrubber Washwater Effluents. WATER 2022. [DOI: 10.3390/w14030287] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A naval ship’s exhaust gas scrubber may discharge polycyclic aromatic hydrocarbons (PAHs) into seawater. Due to the high lipophilicity and low water solubility of PAHs, their concentrations in seawater are extremely low, making them difficult to detect or accurately determine. To accurately assess the impact of scrubber washwater effluent on the PAHs concentration of seawater, appropriate analysis methods must be established. In this study, a large-volume pre-concentration water sampler was used onboard to concentrate PAHs in surface seawater (100 L) from four sites offshore of southern Taiwan. The quantitative and qualitative analysis of dissolved PAHs in seawater and quality control samples were implemented using a GC/MS system with the aid of internal and surrogate standards. Results showed that the field and equipment blank samples of quality control samples were lower than twice the detection limit. The detection limit of individual PAHs is between 0.001 (naphthalene, NA) and 0.014 ng/L (dibenzo[a,h]anthracene, DBA), which meets the requirements for evaluating PAHs in seawater (that is, less than the maximum permissible concentrations (MPCs)). The concentration of total PAHs (TPAHs) in the four seawater samples ranged from 2.297 to 4.001 ng/L and had an average concentration of 3.056 ± 0.727 ng/L. The concentrations of 16 PAHs were determined in each seawater sample, indicating that the analytical method in this study is suitable for the determination of low-concentration PAHs in seawater. Phenanthrene (PHE) is the most dominant compound in seawater samples accounting for 59.6 ± 12.6% of TPAHs, followed by fluorine (FL) accounting for 8.5 ± 3.7%. The contribution of high-ring PAHs to TPAHs is not high (0.5–9.2%), but the observed concentrations can cause a higher risk to aquatic organisms than low-ring PAHs. The diagnostic ratio showed that the sources of PAHs in the seawater collected offshore of southern Taiwan may include mixed sources such as petrogenic, petroleum combustion, and biomass combustion. The results can be used for regular monitoring, which contributes to pollution prevention and management of the marine environment.
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Ya M, Wu Y, Xu L, Li Y, Chen H, Wang X. Compound-specific radiocarbon reveals sources and land-sea transport of polycyclic aromatic hydrocarbons in an urban estuary. WATER RESEARCH 2021; 198:117134. [PMID: 33901842 DOI: 10.1016/j.watres.2021.117134] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
As typical chemical indicators of the Anthropocene, polycyclic aromatic hydrocarbons (PAHs) and their environmental behavior in urban estuaries can reveal the influence of anthropogenic activities on coastal zones worldwide. In contrast to conventional approaches based on concentration datasets, we provide a compound-specific radiocarbon (14C) perspective to quantitatively evaluate the sources and land‒sea transport of PAHs in an estuarine‒coastal surficial sedimentary system impacted by anthropogenic activities and coastal currents. Compound-specific 14C of PAHs and their 14C end-member mixing models showed that 67-73% of fluoranthene and pyrene and 76-80% of five- and six-ring PAHs in the Jiulong River Estuary (JRE, China) originated from fossil fuels (e.g., coal, oil spill, and petroleum-related emissions). In the adjacent Western Taiwan Strait (WTS), the contributions of fossil fuel to these PAH groups were higher at 74-79% and 84-87%, respectively. Furthermore, as a significant biomarker for source allocation of terrigenous organic matter, perylene, a typical five-ring PAH, and its land‒sea transport from the basin through the JRE and finally to the WTS was quantitatively evaluated based on the 14C transport models. In the JRE, fluvial erosions and anthropogenic emissions affected the 14C signature of perylene (Δ14Cperylene, -535 ± 5‰) with contributions of > 38% and < 62%, respectively. From the JRE to the WTS, the decreased Δ14Cperylene (-735 ± 4‰) could be attributed to the long‒range transport of "ocean current-driven" perylene (-919 ± 53‰) with a contribution of 53 ± 8%. This compound-specific 14C approach and PAH transport model help provide a valuable reference for accurately quantifying land‒sea transport and burial of organic pollutants in estuarine‒coastal sedimentary systems.
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Affiliation(s)
- Miaolei Ya
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China; School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Yuling Wu
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Li Xu
- National Ocean Sciences Accelerator Mass Spectrometry Facility, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
| | - Yongyu Li
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Hanzhe Chen
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, China.
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Liu M, Zheng H, Wang W, Ke H, Huang P, Liu S, Chen F, Lin Y, Cai M. Enhanced Sinks of Polycyclic Aromatic Hydrocarbons Due to Kuroshio Intrusion: Implications on Biogeochemical Processes in the Ocean-Dominated Marginal Seas. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:6838-6847. [PMID: 33944554 DOI: 10.1021/acs.est.1c01009] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The biogeochemical processes of polycyclic aromatic hydrocarbons (PAHs) in the South China Sea (SCS) are influenced by the exchanges of water masses, energies, and materials between this marginal sea and the Pacific Ocean. To investigate the impact of oceanic water intrusion on semivolatile compounds, we collected seawater samples in the Western Pacific, northern, and central SCS in 2017 and analyzed for dissolved PAHs. PAH concentrations in the water columns of the Pacific Ocean and SCS were 1.7-11 and 1.1-7.3 ng L-1, respectively, showing spatial distinctions in terms of the composition and source characteristics. A common depletion for three-ring PAHs was found in the northern SCS by comparing the modeling results of conservative mixing by Kuroshio intrusion. Kuroshio water increased the levels of temperature, dissolved oxygen, and nutrients when intruding into the northern SCS and was likely to enhance the bioavailability of PAHs and stimulate their biodegradation process. In the water column, the most effective layer under the Kuroshio intrusion impact is different for three- and four-ring PAHs, where the three-ring PAHs' depletion was most significant at the surface; however, for four-ring PAHs, that was at the deep chlorophyll maximum layer. This study highlighted the effect of ocean currents on PAHs for their water-column processes both from physical and biogeochemical perspectives.
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Affiliation(s)
- Mengyang Liu
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361102, China
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Haowen Zheng
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Weimin Wang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Hongwei Ke
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Peng Huang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
- College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Siguang Liu
- Fujian Institute of Oceanography, Xiamen 361013, China
| | - Fajin Chen
- College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yan Lin
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Minggang Cai
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361102, China
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
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Liu M, Hu J, Lin Y, Ke H, Lian J, Xu Y, Chen K, Zheng H, Chen M, Cai M. Full-depth profiles of PAHs in the Western South China Sea: Influence of Upwelling and Mesoscale Eddy. CHEMOSPHERE 2021; 263:127933. [PMID: 32822935 DOI: 10.1016/j.chemosphere.2020.127933] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
Oceanic processes such as coastal upwelling and mesoscale eddy, could influence the spatial distribution and environmental behaviors of semi-volatile organic pollutants in the marine environment. Seawater samples were collected from the full-depth water columns from the South China Sea (SCS), and PAH concentrations (∑14PAH) in the continental shelf and the open basin areas were 16-110 and 10-93 ng/L respectively. Results of isomeric ratios and principal component analysis illustrated PAHs' mixed sources (petrogenic and pyrogenic). PAH inventory of the SCS seawater was estimated as 100 ± 58 thousand tons, and the majority of them was stored in the intermediate and deep water masses. Generally, full-depth profiles of dissolved PAHs showed an "enrichment in surface and exhaustion in the deep" pattern, and this might be influenced by the oceanic processes such as coastal upwelling or eddy diffusion. In the cross-shelf area, upwelling could enhance the scavenging efficiency of PAHs on the upper layer, and increase the pollutant concentration in the medium and deep water. While in the open-basin area, PAHs were more likely influenced by the halocline stratification and eddy diffusion, and their vertical fluxes due to eddy diffusion was estimated to be 1.2 × 10-6 g s-1. This study highlighted the influences of oceanic processes in transport PAHs in the marginal sea, further study is needed to investigate their seasonal variations related to the monsoon characteristics.
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Affiliation(s)
- Mengyang Liu
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Jiahui Hu
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Yan Lin
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Hongwei Ke
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Jiongjie Lian
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Ye Xu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Kai Chen
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Haowen Zheng
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Mian Chen
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Minggang Cai
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
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11
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Zhou Z, Lu J, Wang J, Zou Y, Liu T, Zhang Y, Liu G, Tian Z. Trace detection of polycyclic aromatic hydrocarbons in environmental waters by SERS. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 234:118250. [PMID: 32197231 DOI: 10.1016/j.saa.2020.118250] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/07/2020] [Accepted: 03/08/2020] [Indexed: 05/29/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are among the most hazardous pollutants and have attracted significant attention in the last decades. Up to now, rapid and on-site trace detection of PAHs remains a challenging issue. Here, taking advantage of the high sensitivity and reliable qualification of Surface-enhanced Raman Spectroscopy (SERS), we firstly carried out trace analyses of 16 typical PAHs in water at concentrations as low as 100-0.1 μg/L, depending on the number of aromatic rings of the molecule. Furthermore, owing to the simplicity of the liquid-liquid extraction (LLE) step, the sensitivity was further improved 2-3 orders of magnitude, and the lowest detectable concentrations were 100, 50, and 5 ng/L for anthracene, pyrene, and benzo[a]pyrene (the three PAHs typically found in heavily polluted waters), respectively. The LLE-SERS approach was successfully applied to the qualitative and quantitative analyses of different (ocean and coast) water samples being spiked by these three PAHs, which showed great promise as a trace detection tool of PAHs under water environments having different contaminant matrices.
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Affiliation(s)
- Zhifan Zhou
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry & Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Jianglong Lu
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry & Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Juyong Wang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yisong Zou
- State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Tao Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yulong Zhang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
| | - Guokun Liu
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry & Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
| | - Zhongqun Tian
- State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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12
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Santos FR, Neves PA, Kim BSM, Taniguchi S, Lourenço RA, Timoszczuk CT, Sotão BMT, Montone RC, Figueira RCL, Mahiques MM, Bícego MC. Organic contaminants and trace metals in the western South Atlantic upper continental margin: Anthropogenic influence on mud depocenters. MARINE POLLUTION BULLETIN 2020; 154:111087. [PMID: 32319916 DOI: 10.1016/j.marpolbul.2020.111087] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 03/12/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
Trace metals, dichloro-diphenyl-trichloroethane (DDTs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs) were quantified in surface sediments from mud depocenters located in the western South Atlantic upper continental margin. There was no anthropogenic trace metal pollution observed, and the higher As values were attributed to high CaCO3 content in the area. The results indicate PCB sources associated with long-range atmospheric transport in addition to past DDT use for agriculture and pest control. PAHs were mainly originated from biomass and fossil fuel combustion, and their distribution is in alignment with the riverine runoff influence in southern region, which is transported towards the northern regions by coastal currents. Higher concentrations of 2-3 ring PAHs and DDTs in shallow and northern stations indicate a coastal influence. This work presents baseline information on the extent of anthropogenic influence in mud depocenters located in the western South Atlantic upper continental margin, showing these locations as potential source to sink of anthropogenic contaminants.
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Affiliation(s)
- Felipe R Santos
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil.
| | - Patricia A Neves
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Bianca S M Kim
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Satie Taniguchi
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Rafael A Lourenço
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Cristian T Timoszczuk
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Basílio M T Sotão
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Rosalinda C Montone
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Rubens C L Figueira
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Michel M Mahiques
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
| | - Márcia C Bícego
- Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
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13
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Karavoltsos S, Sakellari A, Bakeas E, Bekiaris G, Plavšić M, Proestos C, Zinelis S, Koukoulakis K, Diakos I, Dassenakis M, Kalogeropoulos N. Trace elements, polycyclic aromatic hydrocarbons, mineral composition, and FT-IR characterization of unrefined sea and rock salts: environmental interactions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:10857-10868. [PMID: 31950411 DOI: 10.1007/s11356-020-07670-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 01/07/2020] [Indexed: 05/21/2023]
Abstract
Unrefined sea salt originates from seawater, typically by natural evaporation. Being minimally processed, it contains the natural minerals and impurities of seawater. Despite the wide applications of salt for culinary and food preservation purposes, the available composition data is particularly limited. Since seawater often contains various harmful substances at a trace or ultra-trace level, their determination in unrefined salt is significant in terms of quality control and food safety. Twenty-four (24) samples of unrefined sea and rock salts retailed in Greece were studied in terms of their trace metals and polycyclic aromatic hydrocarbon (PAH) content, which constitute the usual pollutants examined in seawater. In addition, samples' color and mineralogy were recorded and their attenuated total reflectance Fourier transform infrared (ATR FT-IR) spectra were obtained. No statistically significant differences were found between sea and rock salts regarding their trace metal (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) content (excluding V) and the 15 PAHs examined. ATR FT-IR succeeded to discriminate among sea, rock, flower, and underground salty water salts. Compared with the typical trace metal concentrations in seawater, quite high Pb values were determined in both sea and rock salts, whereas outliers in the rest of the trace elements examined were scarce. Median values of the sum of PAH (ΣPAHs) concentrations were calculated equal to 2.1 and 2.6 ng g-1 for sea and rock salts, respectively. Environmental interactions of salt production with trace elements and PAHs are also discussed.
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Affiliation(s)
- Sotirios Karavoltsos
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece.
| | - Aikaterini Sakellari
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Evangelos Bakeas
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 118 55, Athens, Greece
| | - Marta Plavšić
- Center for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002, Zagreb, Croatia
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Spiros Zinelis
- Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 115 21, Athens, Greece
| | - Konstantinos Koukoulakis
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Ioannis Diakos
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Manos Dassenakis
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 157 84, Athens, Greece
| | - Nick Kalogeropoulos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University of Athens, 176 76, Athens, Greece
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14
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Wu Y, Wang X, Ya M, Li Y, Liu Y, Chen H. Spatial-temporal distribution and transport flux of polycyclic aromatic hydrocarbons in a large hydropower reservoir of Southeast China: Implication for impoundment impacts. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 257:113603. [PMID: 31767238 DOI: 10.1016/j.envpol.2019.113603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 11/08/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
In order to investigate the impacts of dam-related water impoundment on the spatial-temporal variations and transport of anthropogenic organic pollutants, 15 priority polycyclic aromatic hydrocarbons (PAHs) were analyzed in water samples from the Shuikou Reservoir (SKR) of the Minjiang River. The SKR was formed after the construction of the Shuikou Dam, which is the largest hydropower station in Southeast China. The water samples were collected from the backwater zone of the SKR, in both the wet and dry seasons, corresponding to the drainage and impoundment periods of water flow, respectively. The concentrations of the dissolved PAHs in surface water from the wet season (average of 161 ± 97 ng L-1) were significantly higher (ANOVA, p < 0.01) than those from the dry season (average of 43 ± 21 ng L-1). PAH concentrations in the SKR decreased from upstream (industrialized cities) to downstream (rural towns or counties), indicating high PAH loads caused by intensive urbanization effects. The high proportions of 3-ring PAHs in the wet season were from local sources via surface runoff; while the elevated proportions of 4- to 6- ring PAHs in the dry season reflected atmospheric deposition emerged of these PAHs and/or volatilization of 3-ring PAHs enhanced. Molecular diagnostic ratios of PAH isomers in multimedium and principal component analysis indicated that PAH presence in the SKR was mainly attributed to pyrogenic origin. The isomeric ratios of fluoranthene to fluoranthene plus pyrene in the wet season were homogeneous, implying that there were continuous new inputs along the riverine runoff. However, these ratios showed spatial downward trend in the dry season, indicating continued degradation of PAHs occurred along the transport path during the impoundment period. The input and output fluxes of PAHs in the SKR were 5330 kg yr-1 and 2991 kg yr-1, revealing that the reservoir retained contaminants after impoundment of the hydropower dam.
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Affiliation(s)
- Yuling Wu
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China.
| | - Miaolei Ya
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Yongyu Li
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Yihao Liu
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Hanzhe Chen
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
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15
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Kahkashan S, Wang X, Ya M, Chen J, Wu Y, Cai Y, Saleem M, Inam A, Aftab J. Evaluation of marine sediment contamination by polycyclic aromatic hydrocarbons along the Karachi coast, Pakistan, 11 years after the Tasman Spirit oil spill. CHEMOSPHERE 2019; 233:652-659. [PMID: 31195269 DOI: 10.1016/j.chemosphere.2019.05.217] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/07/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
On July 27, 2003, a spill of approximately 31,000 tons of Iranian light crude oil affected the coast of Karachi, Pakistan. Approximately 11 years after the spill, we analyzed polycyclic aromatic hydrocarbons (PAHs) and their alkylated homologues (alkyl-PAHs) as the indicators to evaluate the residual effect of oil spill to the sediment along the Karachi coast. The total concentrations (dry weight) of parent PAHs and alkyl-PAHs ranged from 121.9 to 735.4 and 42.3-1149.9 ng/g, respectively. The estuary and harbor were the two regions with the highest levels of PAHs in the sediment. Conversely, sedimentary PAHs in the oil spill areas and remote coastal areas showed significantly lower levels. Although the results of the source identification indicated the up to 75.2% of the contribution from petroleum and its derivatives, this could only reflect the direct impact of the Karachi city on the presence of PAHs in the coastal sedimentary environment and did not indicated that the oil spill continues to stay 11 years later. Compared with 11 years ago, the sharply reduced PAH content, great changed composition, and the degradation driven trend of diagnostic ratios all indicated a sharp decrease in the influence of PAHs caused by the oil spill. Finally, the ecological risk caused by the PAH residual in the marine sedimentary ecosystem had disappeared along the Karachi coasts, Pakistan.
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Affiliation(s)
- Sanober Kahkashan
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China; National Institute of Oceanography, Clifton, Block 1, Karachi-75600, Pakistan
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China.
| | - Miaolei Ya
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Jianfang Chen
- Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Yuling Wu
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Yizhi Cai
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Monawwar Saleem
- National Institute of Oceanography, Clifton, Block 1, Karachi-75600, Pakistan
| | - Asif Inam
- National Institute of Oceanography, Clifton, Block 1, Karachi-75600, Pakistan
| | - Javed Aftab
- National Institute of Oceanography, Clifton, Block 1, Karachi-75600, Pakistan
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16
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Soliman YS, Alansari EMA, Sericano JL, Wade TL. Spatio-temporal distribution and sources identifications of polycyclic aromatic hydrocarbons and their alkyl homolog in surface sediments in the central Arabian Gulf. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 658:787-797. [PMID: 30583174 DOI: 10.1016/j.scitotenv.2018.12.093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/06/2018] [Accepted: 12/07/2018] [Indexed: 05/14/2023]
Abstract
The quantitative analysis of 18 parents and their alkyl homologs was performed in sediment samples from the central Arabian Gulf (Gulf) around Qatar Peninsula in six sequential seasons, winter 2014 to spring 2015, at 21 locations with a water depth range of 1.5-60 m. PAHs distribution was patchy with higher concentrations found inside semi-enclosed coastal areas like harbors and bays. The mean PAHs concentration was 112 ng·g-1 dry weight with a range of 0.6 to 1560 ng·g-1 and a variability coefficient of 2.4. The PAHs mean concentration was highest in the winter by a factor of 5 compared to mean summer concentration. A significant seasonal variability in the concentrations of ∑PAHs is mainly attributed to variability in the concentrations of the low molecular weight PAHs fraction and the less alkylated PAHs. Alkylated-PAHs were the most dominant PAHs comprising about 50% of the ∑PAHs, and with about 6 times higher than the mean concentrations in the winter compared to the mean summer concentration. The LPAHs concentrations correlated negatively with temperature and ∑PAHs correlated positively with % clay. Principal component analysis was used to identify sources of PAHs. PAHs in the Gulf have mixed sources with an estimated 57% from petroleum and 43% from pyrogenic sources. Coastal water hydrodynamics and lateral transport processes affect the distribution and composition of PAHs in the central Gulf.
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Affiliation(s)
- Yousria S Soliman
- Department of Biological and Environmental Sciences, Doha, Qatar University, Qatar.
| | | | - José L Sericano
- Geochemical and Environmental Research Group, Texas A&M University, College Station, TX, United States of America
| | - Terry L Wade
- Geochemical and Environmental Research Group, Texas A&M University, College Station, TX, United States of America
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17
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Ya M, Xu L, Wu Y, Li Y, Zhao S, Wang X. Fossil Fuel-Derived Polycyclic Aromatic Hydrocarbons in the Taiwan Strait, China, and Fluxes across the Air-Water Interface. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7307-7316. [PMID: 29856922 DOI: 10.1021/acs.est.8b01331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
On the basis of the application of compound-specific radiocarbon analysis (CSRA) and air-water exchange models, the contributions of fossil fuel and biomass burning derived polycyclic aromatic hydrocarbons (PAHs) as well as their air-water transport were elucidated. The results showed that fossil fuel-derived PAHs (an average contribution of 89%) presented the net volatilization process at the air-water interface of the Taiwan Strait in summer. Net volatile fluxes of the dominant fluorene and phenanthrene (>58% of the total PAHs) were 27 ± 2.8 μg m-2 day-1, significantly higher than the dry deposition fluxes (average 0.43 μg m-2 day-1). The Δ14C contents of selected PAHs (fluorene, phenanthrene plus anthracene, fluoranthene, and pyrene) determined by CSRA in the dissolved seawater ranged from -997 ± 4‰ to -873 ± 6‰, indicating that 89-100% (95 ± 4%) of PAHs were supplied by fossil fuels. The South China Sea warm current originating from the southwest China in summer (98%) and the Min-Zhe coastal current originating from the north China in winter (97%) input more fossil fuel PAHs than the Jiulong River estuary (90%) and Xiamen harbor water (93%). The more radioactive decayed 14C of fluoranthene (a 4-ring PAH) than that of phenanthrene and anthracene (3-ring PAHs) represented a greater fossil fuel contribution to the former in dissolved seawater.
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Affiliation(s)
- Miaolei Ya
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology , Xiamen University , Xiamen , 361102 , China
- National Ocean Sciences Accelerator Mass Spectrometry Facility, Department of Geology and Geophysics , Woods Hole Oceanographic Institution , Woods Hole , Massachusetts 02543 , United States
| | - Li Xu
- National Ocean Sciences Accelerator Mass Spectrometry Facility, Department of Geology and Geophysics , Woods Hole Oceanographic Institution , Woods Hole , Massachusetts 02543 , United States
| | - Yuling Wu
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology , Xiamen University , Xiamen , 361102 , China
| | - Yongyu Li
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology , Xiamen University , Xiamen , 361102 , China
| | - Songhe Zhao
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology , Xiamen University , Xiamen , 361102 , China
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology , Xiamen University , Xiamen , 361102 , China
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18
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Ya M, Wang X, Wu Y, Li Y, Yan J, Fang C, Zhao Y, Qian R, Lin X. Seasonal Variation of Terrigenous Polycyclic Aromatic Hydrocarbons along the Marginal Seas of China: Input, Phase Partitioning, and Ocean-Current Transport. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:9072-9079. [PMID: 28727423 DOI: 10.1021/acs.est.7b02755] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To study the spatial distributions and seasonal differences of concentrations, source identification, and phase partitioning of polycyclic aromatic hydrocarbons (PAHs) in surface water, intensive sampling was carried out along the marginal seas of China in four seasons. In the northern South China Sea (SCS), the highest PAH levels occurred in the summer (July to August) and autumn (October to November). In the East China Sea (ECS) and the Yellow Sea, the highest occurred in the summer (August) and winter (December). In all areas, the lowest PAH levels were found in the spring (May to June). The estimated mass inventory of PAHs in the surface water (0-5 m) of the northern SCS and ECS accounted for less than 8% of PAHs outflow into the offshore environment. That showed the consistent seasonal variation with PAHs levels. Land- and ocean-based emissions, surface runoff, and the open seawater dilution were the most important environmental factors influencing the seasonal heterogeneity and the spatial distributions of PAH in the surface water. The decline of observed organic carbon normalized partition coefficients in the four seasons was probably affected by the presence of submicrometer-sized soot particles accompanying the PAH outflow from China.
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Affiliation(s)
- Miaolei Ya
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Xinhong Wang
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Yuling Wu
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Yongyu Li
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Jingming Yan
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Chao Fang
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Yanyan Zhao
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Ranran Qian
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Xiaolong Lin
- State Key Laboratory of Marine Environmental Science and ‡College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
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