Electronic Theses and Dissertation

Studi tentang penyerapan timbal (Pb) oleh karbon aktif kulit kakao dengan metode pirolisis dilakukan dengan tujuan untuk mengetahui kondisi optimum penyerapan Pb serta mengetahui pengaruh waktu kontak penyerapan, pengaruh perbandingan temperatur pirolisis pada furnace dan pengaruh pH terhadap penyerapan ion Pb yang mampu diserap oleh karbon aktif kulit kakao. Kulit kakao di aktivasi secara fisika dengan pirolisiskan dalam furnace hingga menjadi arang (karbon) pada temperatur pirolisis 300, 340 dan 380°C selama 1,5 jam dan dihaluskan dengan hingga ukuran 100 mesh. Proses adsorpsi limbah Pb dengan karbon aktif bermassa 1 gram dilakukan dengan variasi waktu kontak 30, 60 dan 90 menit serta variasi pH 6, 7 dan 8 dalam kondisi operasi temperatur berlangsungnya proses adsorpsi yaitu 28°C yang dikontakkan selama 1,5 jam dengan pengasukan 180 rpm. Penyerapan optimum Pb akan dievaluasi dengan metode Response Surface model Box-Behnken dari Software Design Expert. Karbon aktif akan diuji SEM (Scanning Electron Microscopy), FTIR (Fourier Transform Infra Red), XRD (X-Ray Diffraction) serta uji AAS (Atomic Absorption Spectoscopy) untuk mendapatkan kapasitas adsorpsi yang dilihat dari uji konsentrasi Pb yang ada di dalam limbah cair.

Research on the absorption of lead (Pb) by cocoa shell activated carbon using pyrolysis method will be conducted with the aim to determine the optimum conditions for Pb absorption and to determine the effect of Pb contact time, the effect of pyrolysis temperature ratio in the furnace and the effect of pH on the absorption of Pb ions that can be absorbed by cocoa shell activated carbon. Cocoa shells were physically activated by pyrolysis in a tube furnace to become charcoal (carbon) at pyrolysis temperatures of 300, 340 and 380°C for 1.5 hours and pulverized to a size of 100 mesh. The adsorption process of Pb waste with 1 gram of activated carbon was carried out with variations in Pb contact time of 30, 60 and 90 minute and pH variations of 6, 7 and 8 at the operating conditions of the adsorption process temperature of 28°C which was contacted for 1.5 hours with 180 rpm stirring. The optimum Pb sorption will be evaluated by Response Surface Method Box-Behnken Design from Design Expert software. The activated carbon will be tested by SEM (Scanning Electron Microscopy), FTIR (Fourier Transform Infra Red), XRD (X-Ray Diffraction) and AAS (Atomic Absorption Spectroscopy) test to determine the adsorption capacity as seen from the Pb concentration test in wastewater.