NEGATIVE ECONOMY PERSEPTION DUE TO THE PRESENCE OF MICROPLASTIC IN MILKFISH (Chanos chanos) IN CITARUM RIVER DOWNSTREAM (CASE STUDY : MUARA GEMBONG)

• Main Author: Agustian Fareza, Achmad
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/43307
• Institution: Institut Teknologi Bandung

Microplastic is a plastic which size less than 5 mm. Microplastic can possibly enters to organism including milkfish. This study aims to value negative perseption due to microplastic concentration in milkfish. Quantification of microplastic in water and sediment samples as a background of environmental condition has also been conducted. Two alternative methods are used to estimate losses due to the presence of microplastic concentration in milkfish. First is the modify factor income approach method which is sourced from interview with milkfish farmer, the second alternative is from interview with consumers. The total of respondent were 30 respondents. Water samples were taken using a manta trawl pulled by a boat while sediment and milkfish samples were taken using the grab sampling method. Organic removal and cleaning was conducted by using the Fenton Oxidation method which use Fe and H2O2. The average of microplastic concentrations in river water, seawater ponds, mixed water, and seawater consecutively are 0.0574 ± 0.025 particles/m3, 3.000 ± 2.645 particles/L, 0.666 ± 0.577 particles/L and 1.333 ± 1.155 particles/L. The average of microplastic concentrations in sediment sea water pond, sediment mixed water pond and sea sediment samples consecutively are 3.666 ± 0.577 particles/20g, 2.670 ± 1.528 particles/20g, 2.333 ± 0.577 particles/20g dan 0.667 ± 0.577 particles/20g. The average of microplastic concentrations in the gut and gills of milkfish in sea ponds and mixed ponds consecutively are 2.666 ± 2.333 particles/fish and 1.166 ± 0.983 particles/fish. The average of microplastic concentrations in milkfish tissues in the sea and mixed water ponds are 1.333 ± 0,577 particles/fish and 1.111 ± 0,838 particles/fish. Based on statistical analysis using Kruskal Wallis test, there are significant differences between microplastic in water and sediment sample at Citarum River based on segment location (p-value = 0.024 and 0.032 < 0.05). The results of estimated losses due to microplastics on milkfish fishery products using alternative I amounted to Rp.52,000,000/year while alternative II amounted to Rp. 2.360.166. Microplastic problems can be solved several aspects such as, increasing the waste serving, optimization of informal sector, implementation of circular economy and increasing of social aspects.