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

Pradit, Siriporn; Puttapreecha, Ratchanee; Noppradit, Prakrit; Buranapratheprat, Anukul; Sompongchaiyakul, Penjai

doi:10.3389/fmars.2022.961729

Cited by 2 publications

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References 41 publications

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“…MPs may harm the environment once they enter the food chain ( Goh et al, 2021 ; Pradit et al, 2022b ). Several previous studies on MPs have focused on the marine environment, such as in sediment ( Pradit et al, 2022c ; Pradit et al, 2021 ), beach sand ( Jualaong et al, 2021 ; Pradit et al, 2020a ; Pradit et al, 2020b ), seawater ( Prarat & Hongsawat, 2022 ), or aquatic biota ( e.g ., fish, bivalves, shrimp, jellyfish, and bristle worm) ( Azad et al, 2018 ; Hamid et al, 2018 ; Lusher, McHugh & Thompson, 2013 ; Goh et al, 2021 ).…”

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confidence: 99%

Occurrence of microplastics in freshwater gastropods from a tropical river U-Taphao, southern Thailand

Jitkaew

Pradit

Noppradit

et al. 2023

PeerJ

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Background Microplastics (MPs) are pollutants in rivers and marine environments. Rivers can be sources and sinks of MPs that enter the biota. Previous studies focusing on freshwater species are quite limited, especially for gastropods. Freshwater gastropods are essential to aquatic ecosystems because they are food to other aquatic animals, such as fish, shrimp, and crabs. They are a crucial link in the food chain between water resources and human food. Therefore, this study aimed to investigate MP accumulation in freshwater gastropods, commonly known as snails (Filopaludina sumatrensis speciosa and Pomacea canaliculata), in a river flowing into a shallow coastal lagoon. Method In this study, snail tissue samples were digested with 30% hydrogen peroxide. The mixture was heated at 60 °C for 24 h. MP particles were identified, counted, and characterized (shape, size, and color) by visual identification under a stereomicroscope. Furthermore, polymer-type identification was performed using Fourier transform infrared spectroscopy (FTIR). Analysis of variance (ANOVA) was applied for the statistical analysis. Results The MPs found were as follows: 4.76 particles/individual were found in F. sumatrensis speciosa upstream, 5.20 particles/individual were found in F. sumatrensis speciosa downstream, 7.28 particles/individual were found in P. canaliculata upstream, and 4.00 particles/individual were found in P. canaliculata downstream. It was found in the two-way ANOVA that the accumulation of MPs in gastropods was affected by species and study sites (upstream and downstream). There was a significant difference in the amount of MPs in P. canaliculata between upstream and downstream sites (p = 0.003). Fibers were the most common MPs in both species. Moreover, P. canaliculata upstream had the most significant amount of MPs. The smallest amount of MPs was recorded for P. canaliculata downstream, but there was great diversity in shape, size, and polymer type. MPs sized 500 μm–1 mm were the most common in both species. Fourier transform infrared spectroscopy revealed six polymers: poly (ethylene terephthalate), polypropylene, rayon, polyethyleneimine, polyamine, and poly (propylene: ethylene). The occurrence of MPs in gastropods is alarming for food security in Thailand. The results of this study can be used to support baseline data on MP accumulation among freshwater gastropods.

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Section: Introductionmentioning

confidence: 99%

Occurrence of microplastics in freshwater gastropods from a tropical river U-Taphao, southern Thailand

Jitkaew

Pradit

Noppradit

et al. 2023

PeerJ

Self Cite

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“…Recent papers exploring the microplastic presence in pumice stone along the coast of Thailand. Microplastic entered the hole of the stone and come along with the stone floating from the South China Sea to the Gulf of Thailand (Pradit, Puttapreecha, et al, 2022).…”

Section: Plastic Pollution In Thailandmentioning

confidence: 99%

Microplastics in mangrove sediments at Maeklong river mouth, Samut Songkhram province

Chaisanguansuk

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Microplastics are omnipresent in our environment. Living organisms were affected by microplastic pollution. This study was investigated microplastic in mangrove environments because there are accumulated various substances from land and sea. Moreover, mangrove is an important ecosystem that is a habitat for marine life�and benthic organism. Our study area is the Maeklong River mouth, Samut Songkhram Province, Thailand. Surface sediments�from 3 stations were collected from the Maeklong River area and 2 core sediments were collected from the Maeklong River mouth and the Queen Sirikit Park. Sediment samples were analyzed by Loss on ignition (LOI) and grain size distribution. Microplastics were digested and observed their characteristics. Surface sediments from the Maeklong River mouth were found microplastic with average 580 ? 87 item per kilogram. The abundance of microplastic at far away site from river mouth was lower amount than at river mouth site. Previous studies in the Klong Khon tidal canal showed that the number of microplastic from the Klong Khon was higher than the Maeklong River. According to the Maeklong River flow are turbulent that affected on sediment also other particle to accumulate. 142 cm core was found microplastic ranging from 0 5,200 items per kilogram that concentration was decreasing with more depth. Location and grain size had an influence in the accumulation of microplastic in sediment. The most common microplastics that found in this study were 0.1 1.0 mm in size. The fiber was the abundance shape of microplastic. Polyester is the prevalent type of plastic in this study, the result refers to the source that can generate microplastic into environment such as wastewater from washing process and material from fishing.

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

Cited by 2 publications

References 41 publications

Occurrence of microplastics in freshwater gastropods from a tropical river U-Taphao, southern Thailand

Occurrence of microplastics in freshwater gastropods from a tropical river U-Taphao, southern Thailand

Microplastics in mangrove sediments at Maeklong river mouth, Samut Songkhram province

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