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Biodegradation Study of Polyblends between Polystyrene-Lignin Using Activated Sludge

Undergraduate Theses from JBPTITBPP / 2010-01-15 15:37:02
By : HOWARDSETYAMUKTI (NIM 10503014), S1 - Department of Chemistry
Created : 2009, with 7 files

Keyword : biodegradasi, polistiren, lignin, lumpur aktif

Dewasa ini penggunaan plastik telah meluas pada berbagai aspek kehidupan masyarakat. Penggunaan dalam skala besar ini menimbulkan kekhawatiran terhadap dampak dari sampah produk-produk plastik terhadap lingkungan. Ini disebabkan karena kebanyakan produk plastik tidak mudah terdegradasi secara alami. Untuk itu telah dilakukan beberapa penelitian mengenai pembuatan plastik ramah lingkungan. Penelitian ini difokuskan pada analisis kemampuan biodegradasi poliblend antara polistiren (PS)-lignin yang telah dibuat pada penelitian sebelumnya. Uji biodegradabilitas dilakukan menggunakan lumpur aktif yang diperoleh dari Laboratorium Hayati, PAU ITB. Sampel polimer diinkubasi selama 5, 10, 15, 20 dan 30 hari. Sampel hasil uji biodegradasi dianalisis dengan cara pengukuran persen pengurangan berat, analisis struktur (FTIR), analisis permukaan (SEM), dan kristalinitas (XRD). Hasil analisis persen pengurangan berat tidak menunjukkan adanya pengurangan yang signifikan, yang berarti sampel poliblend PS-lignin masih sukar terbiodegradasi. Hasil ini didukung oleh hasil analisis gugus fungsi, kristalinitas, dan analisis permukaan.

Description Alternative :

Plastic usage has spread widely across many aspects of human life. The massive scale of plastic usage gives rise to concerns toward the effect of plastic product's waste on the environment. These concerns are related to the fact that plastic products are not readily biodegradable. Therefore several researches had been conducted in order to create an environmentally friendly plastics. The experiment in this research is focused on the analysis of biodegradability of polyblends between polystyrene-lignin acquired from previous research. Biodegradability test was conducted using activated sludge obtained from Life Sciences Laboratory (Laboratorium Hayati), PAU ITB. Polymer samples were incubated for 5, 10, 15, 20 and 30 days. The resulting samples were then analyzed using percent weight loss, structural analysis (FTIR), surface analysis (SEM), and crystallinity analysis (XRD). Percent weight loss analysis does not show significant weight loss which indicates that the samples were difficult to be decomposed by microorganisms in the activated sludge. This result is supported by functional groups, crystallinity and surface morphology analysis.

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