Analisis Logam Berat Timbal (Pb) pada Daging Kerang Lentera (Lingula unguis) di Desa Jaring Halus, Secanggang, Langkat

Abstract

This study aims to analyze lead (Pb) concentrations in the meat of Lingula unguis and to compare them with Pb levels in seawater and sediment in the coastal area of Jaring Halus Beach, Secanggang District, Langkat Regency. From a biological perspective, Lingula unguis plays an important ecological role as a benthic organism with the potential to accumulate heavy metals from its surrounding environment. Sampling has been conducted at three stations selected using purposive sampling based on local environmental characteristics. The results have shown that Pb concentrations in Lingula unguis meat at all stations were <0.07 mg/kg, which were considerably lower than the the maximum permissible limit established by SNI 7387:2009 (1.5 mg/kg). Lead concentrations in seawater have been recorded at <0.002 mg/L, remaining below the quality standard set by the Regulation of the Republic of Indonesia No. 22 of 2021 (0.008 mg/L). Meanwhile, Pb concentrations in sediment have ranged from 0.27 to 0.32 mg/kg, still within the guideline value recommended by ANZECC/ARMCANZ (2000) of 50 mg/kg. These findings indicate that the aquatic environment of Jaring Halus Beach remains in good condition and has not been contaminated by lead at levels that pose risks to marine biota or the surrounding ecosystem.