Seasonal microplastic variations in estuarine sediments from urban canal on the west coast of Thailand: A case study in Phuket province

Phaksopa, Jitraporn; Sompongchaiyakul, Penjai; Tipmanee, Danai

doi:10.1016/j.marpolbul.2021.112452

Cited by 45 publications

(19 citation statements)

References 59 publications

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“…Fragment microplastics are sourced from the degradation of large plastic debris [52][53], packaging material, littering, runoff, or wind deposition [54]. The microplastics sampled in this study were identified as having various colors including black, blue, purple, red, white, and gray (Figure 4), which is consistent with other studies on microplastics [25,34,38]. The particles found in cockles were predominantly black (38 %), whereas the majority of particles found in mussels were blue (41 %) (Figure 4).…”

Section: Resultssupporting

confidence: 88%

“…Whereas, the environmental conditions may are less different in the study area. The other studies reported the contamination of microplastics pollution in the mid-dry and mid-wet season [34,38] in the South of Thailand. While, this present study will provided some missing information for performing an environmental risk assessment of microplastics pollution during the transitional period between the two seasons in the study area.…”

Section: Resultsmentioning

confidence: 97%

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Microplastic Contamination in Blood Cockles and Mussels in Bandon Bay, Suratthani Province, Thailand

et al. 2022

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Widespread microplastic contamination has been of growing concern worldwide and poses a growing threat to the marine environment, particularly the impact on the food chain. This study quantified the presence of microplastics in two bivalves of commercial interest at the Pak Kadae Estuary, Bandon Bay, Surat Thani province, Thailand: green mussel Perna viridis (L.) and cockles Tegillarca granosa (L.). Data collection was carried out over two seasons: dry season (April - May 2019) and wet season (June - August 2019). Microplastics were extracted using a 10 % potassium hydroxide (KOH) digestion method and then identified under a microscope. Results confirmed the presence of microplastics in both cockles and green mussels, during the dry season, with mean concentrations of 0.30±0.07 and 1.26±0.10 items/individual, respectively. During the wet season, the mean microplastic concentrations were 0.20±0.07 and 0.56±0.15 items/individual in the cockles and green mussels, respectively. There was a greater concentration of microplastics found in green mussels compared to cockles (P < 0.05) with no seasonal variation being observed. Five different shapes of microplastics, including fiber, fragment, pellet, rod, and film, were detected in the soft tissues of the bivalves. Fibers were the most common shape in green mussels (49 - 69 %) during both seasons. Cockles, in contrast, predominantly contained the pellet shape in the dry season (49 %) and fiber in the wet season (59 %). In addition, the microplastic concentrations were positively correlated to shell heights of the bivalves (P < 0.01). The number of microplastics recorded in the two commercially exploited species demonstrated the need for controlling plastic pollution in coastal ecosystems. HIGHLIGHTS Green mussels showed higher contamination with microplastics than blood cockles An average (Mean±SD) of 0.28±0.05 to 2.14±0.36 items/individual in cockles and 0.65±0.13 to 3.43±0.21 items /individual in mussels were obtained Microplastic fibers were the dominant shape found in shellfish Blue microplastics was the most frequently found in green mussels whereas the black color dominated in cockles GRAPHICAL ABSTRACT

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 97%

Microplastic Contamination in Blood Cockles and Mussels in Bandon Bay, Suratthani Province, Thailand

et al. 2022

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“…During the past few years, several studies on microplastics in marine ecosystem have been conducted in Thailand, with the focus on marine organisms [34,35], estuarine environments [36,37], and ocean sediment [38]. Despite this, the accumulation of ingested microplastics in fish has been less emphasized [39].…”

Section: Introductionmentioning

confidence: 99%

Presence and Characterization of Microplastics in Coastal Fish around the Eastern Coast of Thailand

et al. 2021

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Marine microplastic has been in the limelight recently. This study aimed to describe microplastic types ingested by 274 fish from Thailand’s eastern coast in 2020 and to compare the microplastic content among different feeding traits. The microplastics in the gastrointestinal tracts and gills were extracted, analyzed, and identified using FT-IR spectroscopy. Approximately 13.14% of the total specimen ingested microplastics, with an average of 0.14 items per individual. The detection frequency of microplastics was relatively high compared with other regions in Thailand but relatively low compared to global standards. Of the microplastic contaminated specimens, 56.41% had at least one piece of microplastic in their gastrointestinal tract. Pelagic (14.47%) species were found to have ingested more microplastics than the demersal (12.63%) group. Dominant aspects found included PET (as in polymers), fiber (as in shape), and black (as in color). However, microplastic numbers fluctuated with the size, weight, and feeding behavior of fish. This result suggested that the pelagic has a higher exposure risk and microplastic ingestion in relatively small quantities in a range of fish species. Our results indicated that the occurrence of microplastics in fish is not influenced by organism habitat or trophic level, although the characteristics of pelagic fish might significantly increase the chance of exposure to microplastics in pelagic species.

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“…The samples were dried in an oven at 50°C for 3-5 h. Each pumice stone was then ground using a mortar and pestle and put in a 500-ml beaker. MPs were extracted from the pumice stones using a density separation method based on NaCl, which is a widely used technique (Wang et al, 2020;Chinfak et al, 2021;Jiwarungrueangkul et al, 2021). The 250-ml saturated NaCl solution (1.2 g/cm3) was filtered through GF/C filter paper before being added to the ground pumice samples.…”

Section: Methodsmentioning

confidence: 99%

“…These rules consist of Rule 1: No cellular or organic structures visible; Rule 2: Fibers should be equally thick throughout their entire length; and Rule 3: Particles should exhibit homogenous color throughout the item. All the MPs found were recorded for amount, size [based on three class sizes (>1 mm; 500 µm-1 mm; <500 µm)] (modified from Karbalaei et al, 2019), color, and shape (fiber, fragment, or other) (Li et al, 2016;Jiwarungrueangkul et al, 2021). Polymer type identification was performed using FTIR (Spectrum Two with Spotlight 200i, Perkin Elmer Inc., Waltham, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

The first evidence of microplastic presence in pumice stone along the coast of Thailand: A preliminary study

Pradit

Puttapreecha²,

Noppradit

et al. 2022

Front. Mar. Sci.

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In February and March 2022, a large amount of pumice stone appeared along the shoreline of Thailand. Pumice is a type of extrusive volcanic rock, and since there are no volcanoes in the Gulf of Thailand, an interesting question was where the pumice stones originated from. Another question was whether the pumice could be a vehicle for microplastics (MPs) which could then journey across the ocean until reaching the coast of Thailand. A preliminary study was begun, which randomly collected samples from seven beaches in five provinces along the coast of Thailand. Grayish-green pumice stones are tiny, porous, and lightweight, ranging from 0.3 to 5.0 cm in size. The examination found 5.7–12.6 MP items per pumice stone. Most of the MP particles observed were less than 1 mm in length. From Fourier transform infrared spectroscopy (FTIR) analysis, the MPs were characterized as polystyrene, polypropylene, poly (ethylene terephthalate) (PET), rayon, and nylon. The MP could have entered the holes in pumice stones while floating on the water surface over long periods. From the seasonal flow patterns, it was revealed that pumice from the South China Sea was more likely to have floated with surface currents into the Gulf of Thailand

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Seasonal microplastic variations in estuarine sediments from urban canal on the west coast of Thailand: A case study in Phuket province

Cited by 45 publications

References 59 publications

Microplastic Contamination in Blood Cockles and Mussels in Bandon Bay, Suratthani Province, Thailand

Microplastic Contamination in Blood Cockles and Mussels in Bandon Bay, Suratthani Province, Thailand

Presence and Characterization of Microplastics in Coastal Fish around the Eastern Coast of Thailand

The first evidence of microplastic presence in pumice stone along the coast of Thailand: A preliminary study

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