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Diansyah G, Rozirwan, Rahman MA, Nugroho RY, Syakti AD. Dynamics of microplastic abundance under tidal fluctuation in Musi estuary, Indonesia. MARINE POLLUTION BULLETIN 2024; 203:116431. [PMID: 38692003 DOI: 10.1016/j.marpolbul.2024.116431] [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: 12/08/2023] [Revised: 04/23/2024] [Accepted: 04/26/2024] [Indexed: 05/03/2024]
Abstract
Tidal dynamics contribute to fluctuations in microplastic abundance (MPs). This is the first study to characterize MPs under the influence of tidal fluctuations in the Musi River Estuary. MPs samples were collected during flood and ebb tides at 10 research stations representing the inner, middle and outer parts of the Musi River Estuary. MPs were extracted to identify the shape, color and size. MP abundances were 467.67 ± 127.84 particles/m3 during flood tide and 723.67 ± 112.05 particles/m3 during ebb tide. The concentration of MPs in the outer zone of the estuary (ocean) was detected to be higher than in the inner zone of the estuary (river). The MPs found were dominated by black color, film shape and size 101-250 μm. A greater abundance of MPs at ebb tide than at flood tide implies that the Musi Estuary's largest source of emissions is discharge from the river.
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Affiliation(s)
- Gusti Diansyah
- Department of Marine Science, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir 30662, South Sumatra, Indonesia.
| | - Rozirwan
- Department of Marine Science, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir 30662, South Sumatra, Indonesia
| | - M Akbar Rahman
- Environmental Management Study Program, Graduate Program, Universitas Sriwijaya, Palembang 30139, South Sumatra, Indonesia
| | - Redho Yoga Nugroho
- Environmental Management Study Program, Graduate Program, Universitas Sriwijaya, Palembang 30139, South Sumatra, Indonesia
| | - Agung Dhamar Syakti
- Marine Science and Fisheries Faculty, Raja Ali Haji Maritime University, Tanjung Pinang 29100, Riau Islands, Indonesia
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Jiang J, He L, Zheng S, Liu J, Gong L. A review of microplastic transport in coastal zones. MARINE ENVIRONMENTAL RESEARCH 2024; 196:106397. [PMID: 38377936 DOI: 10.1016/j.marenvres.2024.106397] [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: 10/30/2023] [Revised: 01/13/2024] [Accepted: 02/05/2024] [Indexed: 02/22/2024]
Abstract
Transport of microplastics (MPs) in coastal zones is influenced not only by their own characteristics, but also by the hydrodynamic conditions and coastal environment. In this article, we first summarized the source, distribution and abundance of MPs in coastal zones around the world through the induction of in-situ observation literature, and then comprehensively reviewed the different transports of MPs in coastal zones, including sedimentation, vertical mixing, resuspension, drift and biofouling. Afterwards, we conducted a comparative analysis of relevant experimental literature, and found that the current experimental research on microplastic transport mainly focused on the settling velocity under static water and the transport distribution under dynamic water. Based on the relevant literature on numerical simulation of microplastic transport in coastal zones, it was also found that the Euler-Lagrange method is the most widely used. The main influencing factor in the Euler method is hydrodynamic, while the Lagrange method and Euler-Lagrange method is hydrodynamic and microplastic particle characteristics. Tides in hydrodynamics are mentioned the most frequently, and the role of turbulence in almost all the literature. The density of MPs is the most influencing factor on transport results, followed by size, while shape is only studied in small-scale models. Some literature has also found that the influence of biofilms is mainly reflected in the changes in the density and size of MPs.
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Affiliation(s)
- Jianhao Jiang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang, China
| | - Lulu He
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang, China.
| | - Shiwei Zheng
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang, China; Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou, 310002, Zhejiang, China
| | - Junping Liu
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang, China
| | - Lixin Gong
- The Eighth Geological Brigade, Hebei Bureau of Geology and Mineral Resources Exploration, Qinhuangdao, 066001, Hebei, China; Marine Ecological Restoration and Smart Ocean Engineering Research Center of Hebei Province, Qinhuangdao, 066001, Hebei, China
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Liu R, Wang T, Li J, Liu X, Zhu Q. Simulation of seasonal transport of microplastics and influencing factors in the China Seas based on the ROMS model. WATER RESEARCH 2023; 244:120493. [PMID: 37683497 DOI: 10.1016/j.watres.2023.120493] [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: 05/06/2023] [Revised: 08/12/2023] [Accepted: 08/14/2023] [Indexed: 09/10/2023]
Abstract
Elucidating the mechanisms governing microplastic transport and spatial distribution in offshore waters is essential to microplastic control. However, current research on microplastic transport in the China Seas is largely restricted to small-scale investigations, which do not provide a comprehensive result. Therefore, in this study, we used the Regional Ocean Modeling System (ROMS) combined with the Lagrangian Transport (LTRANS v.2) model to investigate how microplastics are transported around the China Seas during different seasons and under climatological river discharge. Our findings showed that the microplastic pathways and spatial distributions exhibit marked seasonal variations controlled by circulation patterns in the China Seas, river discharge values, and the characteristics of the microplastic materials. Floating microplastics exhibited the longest transport distance in summer, when microplastics from the Pearl River could be transported up to 1375.8 km through the Tokara and Tsushima straits. The heavy pollution areas in summer were located in the South Yellow Sea and East China Sea, mainly resulting from the contribution of the Yangtze River (>66%). In autumn and winter, more than three-quarters of the microplastics beached off the south-central Chinese coast. In addition, simulating the vertical velocity of the water prolonged the time required for microplastics to reach the open ocean, thereby reducing the amount of microplastics entering the Pacific Ocean by 6% compared to the simulation without the vertical velocity of the water in summer. Microplastics with higher densities were generally transported shorter distances. The transmission distances of PET and PS were two orders of magnitude smaller than that of PE. This study enhances knowledge of the sources and fates of offshore microplastics and provides scientific support for offshore microplastic control.
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Affiliation(s)
- Rongze Liu
- College of Oceanography, Hohai University, Nanjing 210098, China
| | - Teng Wang
- College of Oceanography, Hohai University, Nanjing 210098, China.
| | - Junde Li
- College of Oceanography, Hohai University, Nanjing 210098, China
| | - Xiaohui Liu
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Qing Zhu
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
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Cai C, Zhu L, Hong B. A review of methods for modeling microplastic transport in the marine environments. MARINE POLLUTION BULLETIN 2023; 193:115136. [PMID: 37329736 DOI: 10.1016/j.marpolbul.2023.115136] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/19/2023]
Abstract
Microplastic (MP) pollution is ubiquitous in the oceans and poses serious threats to the marine ecosystems. Nowadays numerical modeling has become one of the widely used tools for monitoring and predicting the transport and fate of MP in marine environments. Despite the growing body of research on numerical modeling of marine MP, the advantages and disadvantages of various modeling methods have not received systematic evaluation in published works. Important aspects such as parameterization schemes for MP behaviors, factors influencing MP transport, and proper configuration in beaching are essential for guiding researchers to choose proper methods in their work. For this purpose, we comprehensively reviewed the current knowledge on factors influencing MP transport, classified modeling approaches according to the governing equations, and summarized up-to-date parameterization schemes for MP behaviors. Critical factors such as vertical velocity, biofouling, degradation, fragmentation, beaching, and washing-off were reviewed in the frame of MP transport processes.
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Affiliation(s)
- Caiyuan Cai
- School of Civil and Transportation Engineering, South China University of Technology, Guangzhou, China
| | - Liangsheng Zhu
- School of Civil and Transportation Engineering, South China University of Technology, Guangzhou, China
| | - Bo Hong
- School of Civil and Transportation Engineering, South China University of Technology, Guangzhou, China.
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Feng Q, Chen Z, An C, Yang X, Wang Z. Tide-induced infiltration and resuspension of microplastics in shorelines: Insights from tidal tank experiments. WATER RESEARCH 2023; 236:119970. [PMID: 37084574 DOI: 10.1016/j.watres.2023.119970] [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: 12/14/2022] [Revised: 04/04/2023] [Accepted: 04/09/2023] [Indexed: 05/03/2023]
Abstract
In the present study, the infiltration and resuspension of microplastics (MPs) in a slope substrate under the influence of repeated tidal forces were investigated using a tidal tank. In the scenario in which MPs were placed on the top of the slope, increasing numbers of particles were observed on the water surface with the increase in tidal cycles. More particles of smaller equivalent particle diameter (dMP) and low density floated to the water surface. The horizontal positions (positive toward the lower tide zone) of MPs showed significant positive correlation with the shortest length c of MPs, MP density, MP weight, dMP, and Corey shape factor, whereas they showed significant negative correlation with the rate of tidal level change and the longest length a of MPs. The vertical positions (positive in the downward direction) of MPs showed significant positive correlation with the shortest length c of MPs, MP density, MP weight, dMP, and Corey shape factor, while they demonstrated significant negative correlation with the largest cross-section area and surface tension of MPs. In the scenario in which MPs were placed at the bottom of the tank, the smaller and low-density particles had a higher possibility of moving upward to the water surface under repeated tidal forces. High-density particles also migrated to the water surface due to the surface tension force. Further, a lower rate of tidal level change contributed to more floating of particles. The horizontal positions of MPs showed significant positive correlation with MP density, while they demonstrated significant negative correlation with the largest cross-section area and surface tension of MPs. The vertical positions of MPs showed significant positive correlation with the longest length a of MPs, MP density, MP weight, and dMP. These results imply that large, high-density, and less flatty particles tend to be distributed in the lower tidal zone and deeper substrate layers. These findings can help understand the redistribution of MPs and assess their risk in the shoreline environment.
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Affiliation(s)
- Qi Feng
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal H3G 1M8, Canada
| | - Zhi Chen
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal H3G 1M8, Canada
| | - Chunjiang An
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal H3G 1M8, Canada.
| | - Xiaohan Yang
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal H3G 1M8, Canada
| | - Zheng Wang
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal H3G 1M8, Canada
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Shen Z, Wang H, Liang D, Yan Y, Zeng Y. The fate of microplastics in estuary: A quantitative simulation approach. WATER RESEARCH 2022; 226:119281. [PMID: 36288665 DOI: 10.1016/j.watres.2022.119281] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/01/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Microplastics pollution is an emerging environmental concern. However, there are almost no MPs numerical simulation studies in the Yangtze Estuary which is considered as the largest plastic export in the world and quantitative simulation is not carried out in the existing models. Therefore, completing quantitative simulation and exploring different patterns of MPs transport are the main objectives of this study. In addition, the concentration distribution and risk of MPs are also analyzed. Mass-Number method is proposed to quantitatively simulate microplastics concentration in Feb. and May with errors of less than 18%. Compared with sediment flocculation and settling transport, independent floating transport is more susceptible to surface currents resulting in increased beaching and more inhomogeneous concentration distribution. Meanwhile, under the influence of current, local topography and salt wedge, the MPs perform linear motion and clockwise spiral motion inside and outside the estuary and rapidly form a "hot spot" on the southeastern part of Chongming Island and 57% to 90% of MPs are beached or settled inside the estuary, especially on the north shore. Therefore, MPs risk in some sensitive targets should be concerned according to risk assessment results. Our results break the space-time limit and explore the fate of MPs in the Yangtze Estuary and provide new idea and concern of MPs numerical simulation.
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Affiliation(s)
- Zilin Shen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Hua Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
| | - Dongfang Liang
- Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK
| | - Yuting Yan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Yichuan Zeng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
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