Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
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@article{JKSA3548, author = {Sriatun Sriatun and Oktaffi Manasikana and Adi Darmawan}, title = {Modifikasi Zeolit Alam dengan Ligan EDTA untuk Adsorpsi Ion Logam Pb2+ dan Cd2+}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {11}, number = {2}, year = {2008}, keywords = {modifikasi; zeolit alam; ligan EDTA; adsorpsi ion logam}, abstract = {Zeolit merupakan aluminosilikat dengan struktur kerangka tiga dimensi, memiliki rongga serta saluran yang saling berhubungan menyebabkan bagian permukaannya menjadi sangat luas. Luas permukaan dan pori zeolit sering dimanfaatkan untuk mengadsorp adsorbat. Dalam efektifitasnya sebagai adsorben, situs asam dan permukaan zeolit alam dapat dimodifikasi dengan ligan EDTA (etilendiamintetraasetat/ ethylenediaminetetraacetic acid). Dengan ligan EDTA diharapkan zeolit menjadi lebih selektif dalam mengadsopsi ion logam Pb2+. Pada penelitian ini zeolit alam (ZA) dimodifikasi dengan ligan EDTA pada variasi konsentrasi yaitu 0,20 M, 0,15 M, 0,10 M dan 0,05 M. Selanjutnya digunakan untuk mengadsorpsi ion logam Pb2+ dan Cd2+ dengan variasi: (i) ukuran partikel ZA 212 pm, 125 pm, dan 90 pm, (ii) rasio adsorbat/adsorben pada 20 mL/g, 30 mL/g, 40 mL/g dan 50 mL/g. Pada penelitian ini juga dilakukan perbandingan kemampuan adsorpsi ZA-EDTA terhadap ion Pb2+ dan Cd2+ dengan kemampuan adsorpsi ZA terhadap kompleks Pb-EDTA dan Cd-EDTA. Hasil penelitian menunjukkan bahwa spektra FTIR ZA sebelum maupun sesudah modifikasi dengan ligan EDTA tidak menampakkan perbedaan yang signifikan. Namun demikian kemampuan ZA setelah modifikasi dengan ligan EDTA (ZA-EDTA) dalam mengadsorpsi logam lebih tinggi. Hasil uji adsorpsi terhadap ion Pb2+ dan Cd2+ menunjukkan bahwa adsorpsi tertinggi oleh ZA-EDTA dengan ukuran partikel ZA 212 pm, sedangkan rasio adsorbat/adsorben terbaik untuk ion Pb2+ adalah 30 mL/g dan untuk ion Cd2+ adalah 20 mL/g. Dari perbandingan yang telah dilakukan juga diketahui bahwa adsorpsi yang dilakukan oleh ZA-EDTA terhadap ion Pb2+ dan Cd2+ lebih baik daripada adsorpsi ZA terhadap kompleks Pb-EDTA dan Cd-EDTA.}, issn = {2597-9914}, pages = {43--47} doi = {10.14710/jksa.11.2.43-47}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/3548} }
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