KARAKTERISASI DAN PEMURNIAN ZEOLIT ALAM LAMPUNG SEBAGAI KANDIDAT ANTIDOTUM KERACUNAN TIMBAL

Abstract

Indonesia memiliki kelimpahan zeolit yang berpotensi dapat dikembangkan sebagai zeolit yang berderajat farmasi. Penelitian ini bertujuan untuk mendapatkan zeolit olahan dengan karakteristik yang cocok sebagai bahan baku farmasi. Zeolit alam diproses dengan cara pencucian menggunakan masing-masing larutan HCl,aquabidest, dan EDTA lalu diikuti dengan pemanasan pada 350 C. Sebelum dan sesudah pengolahan sampel zeolit dikarakterisasi menggunakan berbagai metode instrumental. Selanjutnya, zeolit olahan diuji kemampuannya untuk menjerap parasetamol dan timbal. Hasil analisis menunjukkan bahwa komposisi sampel zeolit > 91% berjenis klinoptilolit dengan kandungan utama unsur Si, Al dan K. Setelah pencucian dengan larutan HCl 1 M, EDTA 0,1 M danaquabidest, kadar As dalam masing-masing sampel zeolit 4,12 0,75 ppm, < 0,1 ppm dan 11,8 0,56 ppm dan kadar Pb untuk seluruh sampel < 1 ppm, sedangkan Cd dari semua sampel < 1 ppm. Tidak ada perubahan struktur dalam sampel zeolit yang teramati setelah proses pencucian dan pemanasan. Zeolit yang dicuci dengan larutan EDTA mampu menjerap Pb dalam cairan lambung buatan tanpa pepsin secara efektif dengan penurunan kadar hingga 89% namun tidak mampu menjerap parasetamol secara efektif. Disimpulkan bahwa hasil proses zeolit menunjukkan karakteristik yang cocok sebagai kandidat bahan baku farmasi. Zeolit yang diberi perlakuan dengan EDTA mampu menjerap Pb secara efektif sehingga berpeluang digunakan sebagai antidot lokal dalam kasus keracunan Pb akut.

Kata kunci:zeolit, klinoptilolit, logam berat.

CHARACTERIZATION AND PURIFICATION OF NATURAL LAMPUNG ZEOLITE AS ACANDIDATE OF ANTIDOTE OF LEAD INTOXICATION

ABSTRACT

Indonesia has the abundance potential of zeolites having possibility to be developed as pharmaceutical grade zeolites. This research aimed to obtain processed zeolite showing suitable characteristics as pharmaceutical ingredient. Natural zeolite was processed by means of washing using dilute HCl, aquabidest and EDTA solutions, respectively and subsequently followed by heating at 350^oC. Prior and after processing, the zeolite samples were characterized using various instrumental methods. Furthermore, the processed zeolite was tested for its ability to adsorb paracetamol and lead. The analysis results confirmed that the composition of zeolite samples were > 91% of clinoptilolite mainly composed of Si, Al and K. After washing with 1 M HCl, 0.1 M EDTA and aquabidest, the level of As in each of zeolite samples were 4.12 0.75 ppm, < 0.1 ppm and 11.8 0.56 ppm and those of Pb were all < 1 ppm, while those of Cd from all samples were < 1 ppm, respectively. No structural changes in zeolite samples were observed after washing and heating treatment. EDTA treated zeolite was able to adsorb Pb in artificial gastric fluid without pepsin effectively up to 89% reduction but failed to adsorb paracetamol effectively. It was concluded that processed natural zeolite was suitable as a pharmaceutical ingredient. EDTA-treated zeolite was able to adsorb Pb effectively and hence could be possibly applied as local antidote in the case of acute Pb intoxication.

Keywords:zeolite, clinoptilolite, heavy metals.