PEMANFAATAN BIOMASSA DAUN PECAH BELING (Strobilanthes crispus) TERMODIFIKASI TANIN SEBAGAI SORBEN UNTUK LOGAM ORGANOLEAD
Abstract
Abstrak: Pb-organik atau senyawa organolead merupakan logam turunan dari Pb yang tingkatan toksisitasnya empat kali lebih tinggi dibandingkan dengan senyawa logam Pb murni dan Pb ionik. Dalam penelitian ini, modifikasi tannin dari biomassa daun Strobilanthes cripus dimanfaatkan sebagai biosoben untuk mengurangi konsentrasi senyawa organolead. Biosorben yang digunakan dalam penelitian ini terdiri dari tiga jenis: biosorben dari biomassa tanpa perlakuan (BTP), biosorben polimerisasi dari biomassa daun (BDP), dan biosorben polimerisasi ekstrak tannin dari biomassa (BEP). y Scanning Electron Microscopy (SEM), kadar air, kadar abu, kadar volatil, dan kadar karbon terikat dilakukan untuk menentukan karakteristik fisik dan kimia biosorben yang dibandingkan dengan SNI 06-3730 dan SII 0258-79. Untuk memperkirakan kapasitas penyerapan logam organolead, maka dilakukan percobaan secara sistem batch, dengan parameter yang mempengaruhi proses adsorpsi terdiri dari variasi ukuran biosorben, dosis biosorben, waktu kontak, serta konsentrasi awal limbah artifisial organolead. Mekanisme penyerapan organolead dianalisis melalui uji isoterm adsorpsi berdasarkan model Langmuir dan model Freundlich)
Kata kunci: organolead, biosorpsi, pecah beling (Strobilanthes cripus), polimerisasi tannin
Abstract : Organic-Pb or organolead compound is a derivative of Pb metal which have toxicity levels four times higher than the pure metal Pb and Pb ionic. In this research, the modification of tannin from the Strobilanthes crispus leaves biomass was utilized as an adsorbent material for the removal of organolead from artificially contaminated solution. Biosorbent used in this study consists of three types: biosorbent from biomass without treatment (BTP), biosorbent treatment polymerization from the biomass (BDP), and biosorbent treatment polymerization from the tannin extract from biomass (BEP). The Scanning Electron Microscopy (SEM), moisture content, ash content, volatile content, and fixed carbon content was conducted to determine the physical and chemical characteristics of biosorbent compared to SNI 06-3730 and SII 0258-79. Batch experiments were used to predict the adsorption capacity of lead ion. Different parameters affecting the adsorption process were tested including initial adsorbent particle size, adsorbent dose, contact time and adsorbate dose. The adsorption process of organolead was tested with Langmuir and Freundlich model.
Key words: organolead, biosorption, pecah beling leaves, polymerization of tannin
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