PENGARUH BENTONIT TEKNIS TERAKTIVASI H2SO4 TERHADAP KAPASITAS ADSORPSI ION Pb2+ THE EFFECT OF TECHNICAL BENTONITE ACTIVATED H2SO4 TOWARD ADSORPTION CAPACITY OF Pb2+ ION

Abstrak. Penelitian eksperimen laboratoris bertujuan untuk mengetahui karakteristik bentonit teknis sesudah diaktivasi H2SO4 serta untuk mengetahui pengaruh bentonit teknis teraktivasi H2SO4 terhadap kapasitas adsorpsi ion Pb2+ . Aktivasi bentonit teknis dilakukan dengan menggunakan larutan H2SO4 1,5 M. Optimasi dalam penelitian ini meliputi konsentrasi adsorbat, massa adsorben, waktu kontak bentonit teknis teraktivasi H2SO4. Karakteristik bentonit teknis sebelum dan sesudah diaktivasi menunjukkan perbedaan dan persamaan  gugus fungsi. Perbedaan bilangan gelombang yaitu pada regangan OH, regangan Al-O-Al, regangan C-H sedangkan. persamaan terletak di vibrasi ulur H-O-H, tekuk H-O-H, regangan O-H, regangan asimetris Si-O-Si,regangan Al-O-Al, regangan C-H, tekuk Al-O-Al dan tekuk Si-O-Al. Hasil surface area alalyzer (SAA) menunjukkan luas permukaan bentonit teknis teraktivasi H2SO4 sebesar 16,514 m2/g Efektivitas adsorpsi menunjukkan bahwa konsentrasi adsorbat optimum bentonit teknis teraktivasi H2SO4 adalah 30 ppm, massa adsorben optimum bentonit teknis teraktivasi H2SO4 adalah 0,1 gram, waktu kontak optimum bentonit teknis teraktivasi H2SO4 adalah selama 60 menit. Kapasitas adsorpsi bentonit teknis teraktivasi H2SO4 adalah 3,8305 mg/g.   Kata-kata kunci: Bentonit teknis, karakteristik, aktivasi, dan kapasitas adsorpsi Abstract. Laboratory experimental research aims to determine the technical characteristics of the bentonite activated after H2SO4 as well as to determine the effect of activated bentonite H2SO4 technical against Pb2 + ion adsorption capacity. Technical bentonite activation is done by using a solution of H2SO4 1.5 M. Optimization in this study include the concentration of the adsorbate, adsorbent mass, contact time technical bentonite activated  H2SO4. Bentonite technical characteristics before and after the show the differences and similarities activated functional groups. Differences in wave numbers are on the OH strain, strain Al-O-Al, while the CH stretch. equation is located in the HOH stretching vibration, buckling HOH, OH strain, strain asymmetric Si-O-Si, strain Al-O-Al, CH stretch, bend Al-O-Al and bending Si-O-Al. Results alalyzer surface area (SAA) indicate technical surface area of activated bentonite H2SO4 was 16.514 m2 / g Effectiveness of adsorption showed that the optimum concentration of adsorbate technical bentonite activated H2SO4 was 30 ppm, the mass of adsorbent optimum technical bentonite activated H2SO4 is 0.1 grams, optimum contact time Technical bentonite is activated H2SO4 for 60 minutes. Technical adsorption capacity of activated bentonite H2SO4 was 3.8305 mg / g. Keywords: Technical bentonite, characteristic, activation, and capacity of adsorptio