Evaluation of the LC50 (Lethal Concentration) for LAS and Pb Administration

The surface water quality in Indonesia is deteriorating due to the accumulation of waste, particularly detergent waste from households and heavy metal waste from industries.This pollution source contributes to the loss of aquatic life.This study aims to determine the LC50 value for aquatic biota, specifically goldfish, and provide recommendations for relevant stakeholders.Acute toxicity tests were conducted over 96 hours using goldfish (Cyprinus carpio L) test subjects, with variations in Linear Alkylbenzene Sulfonate (LAS) and Lead (Pb) concentrations to ascertain the concentration causing 50% mortality, determined through a range-finding test.The toxicity test stage employs various concentrations of toxicants identified during the Range Finding Test stage, including: P0 (0 mg/L both LAS and Pb), P1 (0.05 mg/L LAS & Pb), P2 (0.1 mg/L LAS & Pb), P3 (0.15 mg/L LAS and Pb), P4 (0.2 mg/L LAS and Pb), P5 (0.25 mg/L LAS and Pb) and P6 (0.3 mg/L LAS and Pb).The LC50 value for LAS and Pb was established at 0.313 mg/L.This research can serve as an initial reference for biomonitoring detergent and heavy metal waste in aquatic environments.Effective effluent control is crucial for both industries and households to ensure compliance with government-mandated concentration standards for detergent and heavy metal effluents.