Microplastics and heavy metals contamination in shrimp paste products in Thailand

Name: Pondpimon Nuanphuen

keyword: Shrimp paste

; Microplastics

; Heavy metals

Abstract: Shrimp paste (ka-pi) is one of the fermented fishery products that has been widely consumed in Thailand. This cross-sectional study aims to determine the concentration of microplastic, and heavy metal contaminated in shrimp paste. The results shown that 17 out of 30 shrimp paste samples revealed the presence of microplastic particles, with concentrations ranging from 1 to 11 particles per 30 grams of sample. In contrast, 13 samples showed no detectable microplastic particles. In this study, 6 polymer types were identified, including Polyisoprene (PI), Polypropylene (PP), Polyethylene (PE), Ethylene propylene copolymer (EPC), Polypropylene copolymer (PPC), and additives like Cellulose and alpha. The predominant source of polymer distribution was identified in the Gulf of Thailand area, specifically in Chonburi and Rayong provinces. The heavy metals, including Arsenic (As), Lead (Pb), Cadmium (Cd), and Mercury (Hg) were found. As and Hg contaminants were found in all 30 sample products. The range of the As concentration was 0.545-9.276 mg/kg, and the highest arsenic levels detected in samples from the Andaman Sea while Hg ranged from 0.031 to 0.349 mg/kg. Pb concentrations were found in 4 out of 15 samples, and 1 out of 4 samples were higher than the Thailand acceptable value in the Andaman Sea samples. More than 80% of samples from both areas of study had Cd contaminants in the shrimp paste products. Even though the Cd concentration in all samples was lower than the acceptable value (range from 0.109–0.533 mg/kg). The results show that As, Pb, Cd and Hg were not significantly different between research areas Andaman Sea and Gulf of Thailand (p-value >0.05). This research serves as foundational data for regulatory agencies, facilitating the development of protective measures and addressing environmental contamination and occupational health and safety concerns. To promote public health, educational training programs for shrimp paste production should be developed

Thammasat University. Thammasat University Library

Address: BANGKOK

Email: preserv@tu.ac.th

Name: Saowanee Norkaew

Role: advisor

Name: Nontiya Homkham

Role: co-advisor

Created: 2023

Modified: 2024-07-25

Issued: 2024-07-25

วิทยานิพนธ์/Thesis

application/pdf

DOI: 10.14457/TU.the.2023.35

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Occupational and Environmental Health

Grantor: Thammasat University

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