Spatial and temporal variations of coastal microplastic pollution in Hong Kong

Tsang, Y.Y.; Mak, Chu Wa; Liebich, C.; Lam, Sai-Wo; Sze, Eric Tung-Po; Chan, King Ming

doi:10.1016/j.marpolbul.2020.111765

Cited by 28 publications

(8 citation statements)

References 30 publications

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“…The MPs abundance in the seawater were similar to that reported in the east coast of Hainan Island (14.9 items L −1 ) (Tang et al, 2021) and in the lagoon of the Xisha Islands (15.9 items L −1 ) (Ding et al, 2019). However, this was much higher than the other observations in the South China Sea, such as the Hong Kong coast, Haikou Bay, Pearl River Estuary, the Xisha Islands, and the Nansha Islands (Cai et al, 2018;Ding et al, 2019;Huang et al, 2019;Nie et al, 2019;Wang et al, 2019;Yan et al, 2019;Qi et al, 2020;Tan et al, 2020;Tsang et al, 2020;Xie et al, 2021).…”

Section: Microplastics Features In Seawatersupporting

confidence: 84%

“…Additionally, the difference in MPs abundance might due to the different sampling methods. In our study, the seawater were sampled by plexiglass water sampler and all the particles above 45 µm were collected, while the other collected by plankton net (153 µm) (Tsang et al, 2020) or nylon Neuston nets (333 µm) (Cai et al, 2018;Qi et al, 2020;Tan et al, 2020). The MPs with the size range of 153-333 µm could be easily lost when sampling.…”

Section: Microplastics Features In Seawatermentioning

confidence: 99%

“…Plastic debris was first noted as a potential coastal water problem in 1971 (Carpenter et al, 1972), and MPs (plastic fragments < 5 mm, MPs) are now a widespread form of contamination in marine ecosystems (Moore, 2008;Andrady, 2011), from the Arctic waters (Lusher et al, 2015) to the remote Islands (Ding et al, 2019;Saliu et al, 2019;Tan et al, 2020;Oldenburg et al, 2021) and the coastal waters (Sutton et al, 2016;Yan et al, 2019;Qi et al, 2020;Tsang et al, 2020;Xie et al, 2021). MPs could enter the marine environment via multiple ways, such as ship transportation, fisheries, and domestic sewage discharges (Lusher et al, 2015;Sutton et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

et al. 2021

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Microplastics (MPs) contamination is widespread in the coral reef ecosystems leading to the exposure of both corals and other biotas. Knowledge gaps still exist concerning patterns in MPs abundance spatially. This work quantified the MPs abundance and characteristics in the seawater and corals in the Sanya Bay, Hainan Island. MPs abundance was detected in the seawater and coral samples ranging from 15.50 to 22.14 items L–1, and 0.01 to 3.60 items polyp–1, respectively. We found the predominant size and type of MPs in seawater and corals were smaller than 2 mm and fiber. Further analysis revealed that the characteristics of MPs in the corals were significantly different from those in the seawater environment, indicating that the MPs are selectively enriched in corals. Furthermore, the MPs particles ingested and retained in coral tissue may be related to the polyp size. This study shows that MPs are present in the whole coral reef region and the coral community structure would be potentially harmed by these contaminants.

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Section: Microplastics Features In Seawatersupporting

confidence: 84%

Section: Microplastics Features In Seawatermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

et al. 2021

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“…MPs generated through grinding are known as primary MPs for, e.g., drug carriers and abrasives used in personal care products such as shampoos, tooth pastes and cleansers [13,27]. On the other hand, secondary MPs are formed under the external force of physical, chemical and biological degradation of large and visible plastic items such as commodity packages, discarded clothing, digital products, footwear, plastic bottles and fibers in laundry effluents [12,[27][28][29]. In addition, based on polymer type, micro-plastics can be polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyamide (PA), poly (ethylene terephthalate) (PET), poly-lactic acid (PLA), etc.…”

Section: Introductionmentioning

confidence: 99%

Phytotoxic Effects of Polyethylene Microplastics on the Growth of Food Crops Soybean (Glycine max) and Mung Bean (Vigna radiata)

Wang

Liu

Kaur

et al. 2021

IJERPH

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Accumulation of micro-plastics (MPs) in the environment has resulted in various ecological and health concerns. Nowadays, however, studies are mainly focused on toxicity of MPs on aquatic organisms, but only a few studies assess the toxic effects of micro-plastics on terrestrial plants, especially edible agricultural crops. The present study was aimed to investigate the adverse effects of polyethylene (PE) microplastics on the germination of two common food crops of China, i.e., soybean (Glycine max) and mung bean (Vigna radiata). Both the crops were treated with polyethylene microplastics (PE-MPs) of two sizes (6.5 μm and 13 μm) with six different concentrations (0, 10, 50, 100, 200, and 500 mg/L). Parameters studied were (i) seed vigor (e.g., germination energy, germination index, vigor index, mean germination speed, germination rate); (ii) morphology (e.g., root length, shoot length) and (iii) dry weight. It was found that the phyto-toxicity of PE-MPs to soybean (Glycine max) was greater than that of mung bean (Vigna radiata). On the 3rd day, the dry weight of soybean was inhibited at different concentrations as compared to the control and the inhibition showed decline with the increase in the concentration of PE-MPs. After the 7th day, the root length of soybean was inhibited by PE-MPs of 13 μm size, and the inhibition degree was positively correlated with the concentration, whereas the root length of mung bean was increased, and the promotion degree was positively correlated with the concentration. Present study indicated the necessity to explore the hazardous effects of different sizes of PE-MPs on the growth and germination process of agricultural crops. Additionally, our results can provide theoretical basis and data support for further investigation on the toxicity of PE-MPs to soybean and mung bean.

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“…And the variation of suspended sediments in seawater is a necessary part of routine marine monitoring. Microplastics as a new and manmade type of pollutant have become a major global environmental problem and become the research hotspots in recent years (Lin et al 2020; Tsang et al 2020). Microplastics can affect the metabolism of phytoplankton and aquatic organisms in water (Wu et al 2020), and even enter the human body through water and food chains (Liu et al 2021).…”

mentioning

confidence: 99%

Classification of suspended particles in seawater using an in situ polarized light scattering prototype

Deng,

Wang,

Guo

et al. 2023

Limnology & Ocean Methods

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Classification of suspended particles characterizes the composition of seawater, which helps the interpretation of remote sensing data and promotes the researches of the matter exchanges in ocean processes. In this article, an in situ prototype based on polarized light scattering is introduced, and its ability to classify the suspended particles is demonstrated. The experimental results show that the prototype can classify the sediments, microplastics, and phytoplankton in seawater with an accuracy larger than 85%, and further calculate their relative proportion in water. In the summer and winter of 2020, the prototype was deployed three times in Daya Bay and lasted for dozens of hours each time, along with the additional commercial sensors, that is, Environment X Observation (EXO) and Acoustic Doppler Current Profiler (ADCP). The chlorophyll content measured by EXO and the acoustic backscatter intensity measured by ADCP are respectively related to the number of algal cells and sediments in the water, which helps to interpret the data of the prototype. The results of field data show that the prototype can effectively classify phytoplankton and sediment particles in seawater and monitor their temporal variations. Besides, the retrieved information of the suspended particles is consistent with the analysis from the flow dynamics and season variations in Daya Bay. These results indicate the ability of this prototype to classify the suspended particles in seawater, which promises its potential contribution to particulate oceanography in the future.

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Spatial and temporal variations of coastal microplastic pollution in Hong Kong

Cited by 28 publications

References 30 publications

Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

Abundance and Characteristics of Microplastics in Seawater and Corals From Reef Region of Sanya Bay, China

Phytotoxic Effects of Polyethylene Microplastics on the Growth of Food Crops Soybean (Glycine max) and Mung Bean (Vigna radiata)

Classification of suspended particles in seawater using an in situ polarized light scattering prototype

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