ABSTRAKPenelitian tentang pengaruh suhu aktivasi terhadapdayaserapmetilen biru daricangkangtelurtelah dilakukan. Cangkang telur diaktivasi menggunakan alat furnace pada variasi suhu 1500C, 2000C dan 3000C. Cangkang telur yang telah diaktivasi digunakan sebagai adsorben untuk penyerapan zat warna metilen biru denganvariasi waktu kontak, pH larutan, dan konsentrasi awal larutan zat warna. Hasil penelitianmenunjukkan bahwa suhu aktivasi optimum diperoleh pada 2000C dengan kapasitas serapan sebesar 0,197 (mg/g) dan %removal sebesar 98,58%. Hasil uji adsorpsimenunjukkan bahwa kapasitas serapan optimum metilen biru diperoleh waktu kontak selama 15 menitdanpH 12. Adsorpsimetilenbiruolehcangkangtelurteraktivasimengikutipersamaan isoterm Langmuirdengan nilai koefesien korelasi (R2 ? 0,98). Kapasitasserapanmaksimum (qmax) zat warna metilen biru yaitu sebesar 0,321 (mg/g).Kata Kunci: Cangkang telur, Metilen biru, Adsorpsi, Aktivasi, Penyerapan zat warna. ABSTRACTThe effect of activation temperature ofeggshell on methylene blue adsorption has been studied. The eggshell was activated at variation temperatureof 150oC, 200oC and 300oC. Activated eggshell obtained was then used asadsorbent for methylene blue dye removal from aqueous solution. The effectof contact time, pHand initial consentration of dye solution on adsorption capacity of methylene blue was also studied. The results showedthat the optimum activation temperature was obtained at 200oC with adsorption capacity of0.197 (mg/g) and% removalof 98.58%. The adsorption studies showed that optimum adsorption occurred ata contact time 15 minutes and pH of 12. Adsorption of methylene blue by theactivated eggshell followed the Langmuir isotherm equation with the value of the correlation coefficient (R2) ? of 0.98. The maximum adsorption capacity (qmax) of methylene blue dye was 0.321 (mg/g). Keywords: Eggshell, Methylene blue, Adsorption, Activation, Dye removal
