Telah dilakukan penelitian tentang pengaruh aktivasi fisis zeolit sebagai media filter terhadap penurunan kadar logam Pb dan Mn. Zeolit diperoleh dari Klaten dengan ukuran butir 20-30 mesh yang diaktivasi pada variasi suhu 100 derajat Celcius, 150 derajat Celcius, 200 derajat Celcius, 250 derajat Celcius, dan 300 derajat Celcius serta dengan variasi waktu aktivasi 30 menit, 45 menit, 60 menit, 75 menit, dan 90 menit. Sampel uji yang digunakan pada penelitian ini adalah larutan Pb(NO3)2 dan MnCl2 dengan debit 20 tetes/menit. Hasil penelitian menunjukkan bahwa suhu aktivasi dan lama aktivasi zeolit berpengaruh pada efektivitas penurunan kadar logam Pb dan Mn. Hasil optimum penyaringan logam Pb tercapai hampir di setiap perlakuan aktivasi yaitu efektivitasnya 100%, sedangkan hasil optimum penyaringan logam Mn tercapai ketika zeolit diaktviasi pada suhu 100 derajat Celcius selama 45 menit dengan efektivitas 99,97%.

Research on the influence of zeoltile physical activation as filter medium toward decreasing Pb and Mn metal content has been done. Zeolite was obtained from with grain size of 20-30 mesh which was activated on temperature variation 100 degrees Celcius, 150 degrees Celcius, 200 degrees Celcius, 250 degrees Celcius, and 300 degrees Celcius and with variation of activation time 30 minutes, 45 minutes, 60 minutes, 75 minutes, and 90 minutes. The test samples used in this research is Pb(NO3)2 and MnCl2 with flow discharge 20 drops/minute. The results showed that activation temperature and duration of zeolite activation had an effect on effectiveness of decreasing Pb and Mn metal content. The optimum result of Pb metal filtration was achieved in almost every activation treatment that was 100% efectiveness, while optimum result of Mn filtering was achieved when zeolite was activated at 100 degrees Celcius for 45 minutes with effectivenes of 99,97%.

Kata Kunci : zeolit, aktivasi fisis, media filter, penurunan kadar logam.