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Kemampuan Degradasi Mikroplastik Polycaprolactone oleh Bakteri Asosiasi Karang Keras di Pantai Kartini Jepara
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Researchers isolated bacteria associated with hard corals at Kartini Beach, Jepara, Indonesia, identifying a Bacillus aerius isolate (99.71% similarity) from massive coral with potential to degrade polycaprolactone microplastics via polyesterase enzyme activity, suggesting coral-associated bacteria as a promising source for microplastic-degrading organisms.
Jutaan ton sampah plastik global akan berakhir ke laut setiap tahunnya. Dampak adanya mikroplastik telah menjadi ancaman bagi organisme laut, salah satunya karang keras yang merupakan penyusun ekosistem terumbu karang. Penelitian ini bertujuan memperoleh bakteri asosiasi karang keras yang berpotensi mendegradasi mikroplastik dari dari perairan Pantai Kartini, Jepara. Sampel karang diambil dari tiga macam life form yaitu branching, massive, dan submassive pada kedalaman 5 – 10 meter. Sampel karang selanjutnya dilakukan pengenceran bertingkat, kemudian diinokulasi pada media agar laut zobell 2216E. Skrining uji potensi degradasi mikroplastik dilakukan menggunakan substrat tributyrin sebagai tahap awal untuk mengetahui aktivitas enzim lipolitik, dilanjutkan dengan uji polycaprolactone untuk mengetahui potensi adanya enzim poliesterase yang dapat memecah partikel mikroplstik. Tahapan analisa molekuler dilakukan meliputi ekstraksi DNA, amplifikasi DNA gen 16S rRNA, elektroforesis, dan analisa filogenetik. Hasil penelitian didapatkan sebanyak 37 isolat bakteri asosiasi karang keras dari berbagai life form. Delapan bakteri diketahui berpotensi memiliki aktivitas enzim lipolitik pada media tributyrin. Dilanjutkan pada uji polycaprolactone dihasilkan satu isolat bakteri dari karang massive degan kode PK-KM-1.1 yang berpotensi mendegradasi polimer polycaprolactone. Analisa molekuler menunjukkan isolat PK-KM-1.1 memiliki kemiripan dengan Bacillus aerius hingga 99,71%. Hasil penelitian ini menunjukkan bahwa bakteri yang berasosiasi dengan karang keras berpotensi mendegradasi senyawa mikroplastik polycaprolactone dan dapat dijadikan sebagai sumber inang di dalam eksplorasi bakteri pendegradasi mikroplastik.
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This Indonesian review examines microorganisms with the potential to biodegrade microplastics in marine environments, including bacteria that can use plastic as a carbon source. Identifying plastic-degrading microbes is a step toward developing biological remediation strategies for marine microplastic pollution.
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Researchers isolated bacteria from Jakarta Bay, Indonesia, that showed the ability to degrade polyethylene and polyethylene terephthalate microplastics in laboratory conditions. They identified the most effective bacterial strains and confirmed plastic degradation through weight loss measurements and surface analysis. The study supports the potential of using naturally occurring marine bacteria for bioremediation of plastic-polluted coastal environments.
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This Indonesian study investigated the ability of a mixed bacterial culture (including Clostridium species) to degrade microplastics in aquatic ecosystems. Biological degradation by bacteria is a promising but challenging approach to reducing the accumulation of persistent microplastic pollution in water bodies.
Biodegradation of Polyethylene Microplastic using Culturable Coral-Associated Bacteria Isolated from Corals of Karimunjawa National Park
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Researchers isolated bacteria from corals in Indonesia's Karimunjawa National Park and tested their ability to degrade polyethylene microplastics. Coral-associated bacteria showed measurable polyethylene degradation activity, suggesting that coral reef microbial communities may contribute to local plastic breakdown despite the slow overall rate.
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Indonesian researchers characterized plastic waste accumulating at Timur Port in Bangkalan, finding LDPE dominance at all sampling stations, and demonstrated that indigenous bacteria from salt-washing wastewater (bittern) achieved measurable plastic biodegradation with an average weight loss from 0.0019g to 0.0012g. This study highlights the potential of locally sourced microbial communities as cost-effective biological agents for reducing coastal plastic accumulation and associated microplastic fragmentation in harbor environments.
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