ANALISIS MIKROPLSTIK DI SUNGAI WAY BALAU KOTA BANDAR LAMPUNG MENGGUNAKAN METODE FTIR

UMEI, LINDA APINTASARI (2026) ANALISIS MIKROPLSTIK DI SUNGAI WAY BALAU KOTA BANDAR LAMPUNG MENGGUNAKAN METODE FTIR. Diploma thesis, UIN RADEN INTAN LAMPUNG.

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Abstract

ABSTRAK Mikroplastik merupakan partikel plastik berukuran kurang dari 5 mm yang banyak ditemukan di perairan dan dapat mencemari lingkungan. Penelitian ini bertujuan untuk mengetahui jumlah, bentuk, warna, jenis polimer mikroplastik, serta kondisi kualitas air di Sungai Way Balau Kota Bandar Lampung. Pengambilan sampel dilakukan pada empat lokasi dari hulu hingga hilir sungai. Analisis mikroplastik dilakukan menggunakan mikroskop dan FTIR, sedangkan kualitas air diukur berdasarkan parameter pH, COD, TSS, dan debit air. Hasil penelitian menunjukkan bahwa mikroplastik ditemukan di seluruh lokasi dengan total 32 partikel/L. Jumlah tertinggi ditemukan di Panjang (14 partikel/L) dan terendah di Kedaton (4 partikel/L). Bentuk mikroplastik yang ditemukan yaitu fiber, film, dan fragment, dengan fiber sebagai bentuk yang paling banyak ditemukan. Warna mikroplastik yang teridentifikasi meliputi transparan, kuning, merah, hitam, dan biru. Hasil FTIR menunjukkan adanya polimer Polyamide (PA), nylon, rayon atau selulosa. Nilai pH dan TSS masih memenuhi baku mutu, sedangkan COD telah melebihi baku mutu. Secara umum, Sungai Way Balau telah tercemar mikroplastik yang diduga berasal dari aktivitas masyarakat dan kegiatan di sekitar sungai. Kata kunci: Mikroplastik, Sungai Way Balau, FTIR, Kualitas Air. ABSTRACT Microplastics are plastic particles smaller than 5 mm that are commonly found in water and can pollute the environment. This study aims to find out the quantity, shape, color, types of microplastic polymers, as well as the water quality conditions in the Way Balau River in Bandar Lampung City. Samples were taken from four locations from upstream to downstream of the river. Microplastic analysis was conducted using a microscope and FTIR, while water quality was measured based on pH, COD, TSS, and water discharge parameters. The results showed that microplastics were found at all locations with a total of 32 particles/L. The highest amount was found in Panjang (14 particles/L) and the lowest in Kedaton (4 particles/L). The shapes of microplastics found were fiber, film, and fragment, with fiber being the most common form. The identified colors of microplastics included transparent, yellow, red, black, and blue. FTIR results show the presence of polymers like Polyamide (PA), nylon, rayon, or cellulose. The pH value and TSS still meets the quality standards, while COD has exceeded the quality standards. In general, Way Balau River has been contaminated with microplastics, suspected to come from community activities and activities around the river. Keywords: Microplastics, Way Balau River, FTIR, Water Quality.

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