HARIS, Amnan and Hadiyanto, Hadiyanto and Muhammad, Fuad (2021) INTERAKSI PLASTIK POLISTIRENA (PS) DENGAN MIKROALGA SPIRULINA (Arthrospira platensis) DALAM LINGKUNGAN AIR TAWAR DAN AIR PAYAU. Masters thesis, School of Postgraduate Studies.

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	Text BAB I PENDAHULUAN.pdf Download (301kB)
	Text BAB II TINJAUAN PUSTAKA.pdf Download (698kB)
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Abstract

Stirofoam sering kita jumpai sebagai sampah yang mencemari badan air. Harga murah, bentuk beraneka ragam dan tahan panas membuat penggunaan stirofoam semakin masif. Stirofoam termasuk sampah plastik yang susah diuraikan secara alami. Pengetahuan kita untuk mendegradasi stirofoam masih sangat minim. Tujuan penelitian adalah menganalisis interaksi antara stirofoam dan Spirulina. Penelitian menguji pertumbuhan Spirulina di bawah tekanan stirofoam, perubahan gugus fungsi stirofoam, dan interaksi keduanya. Metode penelitian yaitu kultur dilakukan dalam air-tawar (0 ppt) dan air-payau (12 ppt) selama 30 hari kemudian diuji Kruskal-Wallis. Hasil panen Spirulina diuji SEM-EDX dan stirofoam diuji FTIR. Hasil penelitian menunjukkan konstanta kecepatan pertumbuhan tertinggi Spirulina pada kultur yang diberi perlakuan stirofoam 150 mg, yaitu sebesar y = 0,0705x pada kultur air tawar dan y = 0,0401x pada kultur air payau. Analisis FTIR menunjukkan telah terjadi perubahan gugus fungsi pada stirofoam yaitu gugus alkohol (-COOH) pada panjang gelombang 3400-3200 cm-1 dan ada rantai siklik yang terbuka (muncul peak pada panjang gelombang 1680-1600 cm-1). Hasil uji SEM-EDX, menunjukkan stirofoam dapat menjadi sumber nutrisi khususnya karbon bagi Spirulina untuk berfotosintesis. Keberadaan unsur anorganik lain membuktikan Spirulina mampu menyerap kontaminan. Kesimpulannya ada interaksi antara stirofoam dan Spirulina. Saran dari penulis yaitu salinitas kultur bisa divariasi untuk mengetahui konstanta kecepatan pertumbuhan dan kemampuan degradasi yang lebih baik.
Kata kunci : Mikroplastik, Biodegradasi, Tujuan Pembangunan Berkelanjutan

We often encounter stirofoam as garbage that pollutes water bodies. Low price, various forms and heat resistance make the use of styrofoam even more massive. Stirofoam is a plastic waste that is difficult to decompose naturally. Our knowledge to degrade styrofoam is still very minimal. The aim of the study was to analyze the interaction between styrofoam and Spirulina. This study examined the growth of Spirulina under styrofoam stress, changes in styrofoam functional groups, and their interactions. The research method is Spirulina culture was carried out in fresh water (0 ppt) and brackish water (12 ppt) for 30 days and tested by Kruskal-Wallis analysis. Spirulina yields were tested by SEM-EDX and styrofoam samples were tested by FTIR. The results showed the highest growth rate of Spirulina in cultures treated with 150 mg styrofoam, y = 0.0705x in freshwater cultures and y = 0.0401x in brackish water cultures. FTIR analysis shows there has been a change in the functional group on styrofoam, there are the alcohol group (-COOH) at a wavelength of 3400-3200 cm-1 and there is an open cyclic chain (peaks appear at a wavelength of 1680-1600 cm-1). SEM-EDX test results show that styrofoam can be a source of nutrients, especially carbon for Spirulina that use to photosynthesize. The presence of other inorganic elements proves that Spirulina is capable of absorbing contaminants. So, it can be concluded that there is an interaction between styrofoam and Spirulina. Suggestions from the authors are that the culture salinity can be varied to determine better growth rate and degradation ability.
Keywords: Microplastic pollutant, Biodegradation, Sustainable Development Goals (SDGs)

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