?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+DAN+KARAKTERISASI+KANDUNGAN+SILIKA+(SiO2)+SEBAGAI+HASIL+EKSTRAKSI+BATU+APUNG+(PUMICE)&rft.creator=Trianasari%2C+1217041050&rft.subject=Q+Science+(General)&rft.subject=QC+Physics&rft.description=ABSTRAK%0D%0A%0D%0ATelah+dilakukan+analisis+dan+karakterisasi+tentang+silika+dari+batu+apung+dengan+metode+ekstraksi+menggunakan+NaOH%2C+H2SO4%2C+dan+HCl.+Serbuk+batu+apung+sebelum+ekstraksi+dikalsinasi+pada+suhu+450+oC+selama+4+jam.+Sedangkan+serbuk+hasil+ekstraksi+dikalsinasi+pada+suhu+800+oC+selama+3+jam.+Serbuk+sebelum+dan+setelah+ekstraksi+dikarakterisasi+dengan+X-Ray+Diffraction+(XRD)+dan+Scanning+Electron+Microscopy-Energy+Dispersive+X-Ray+Spectrometry+(SEM-EDS).+Selain+itu+dilakukan+pula+karakterisasi+Differential+Thermal+Analysis-Thermogravimetric+Analysis+(DTA-TGA)+untuk+sampel+sebelum+ekstraksi+dan+Transmission+Electron+Microscopy+(TEM)+untuk+sampel+setelah+ekstraksi.+Pola+XRD+serbuk+batu+apung+berbentuk+amorf+yang+didominasi+oleh+silika+dengan+beberapa+puncak+kristal+merupakan+senyawa+oksida+selain+silika.+Hasil+tersebut+telah+dikonfirmasi+dengan+SEM-EDS+yang+menunjukkan+bahwa+kandungan+silika+memiliki+persentase+tertinggi%2C+yaitu+65%2C88%25+untuk+sampel+sebelum+ekstraksi+dan+78%2C95%25+untuk+sampel+setelah+ekstraksi.+Dari+pengamatan+TEM+menunjukkan+partikel+berbentuk+bulat%2C+dengan+ukuran+butiran+partikel+sebesar+5%2C8+%C2%B1+0%2C2+nm.+Analisis+DTA-TGA+untuk+serbuk+batu+apung+menunjukkan+terjadinya+peristiwa+endoterm+dan+eksoterm+yang+disertai+dengan+penyusutan+massa+seiring+dengan+kenaikan+suhu+pemanasan.%0D%0A%0D%0AKata+kunci%3A+batu+apung%2C+silika%2C+metode+ekstraksi%2C+dan+nanostruktur.%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AAnalysis+and+characterization+of+silica+from+pumice+was+done+by+extraction+method+using+NaOH%2C+H2SO4%2C+and+HCl.++Powder+of+pumice+before+extraction+was+calcined+at+450+oC+for+4+hours.+The+extraction+powder+was+calcined+at+800+%C2%B0C+for+3+hours.+The+powder+before+and+after+the+extraction+were+characterized+by+X-Ray+Diffraction+(XRD)+and+Scanning+Electron+Microscopy-Energy+Dispersive+X-Ray+Spectrometry+(SEM-EDS).+Sample+also+characterized+by+Differential+Thermal+Analysis-Thermogravimetric+Analysis+(DTA-TGA)+before+extraction+and+after+extraction+was+analyzed+by+Transmission+Electron+Microscopy+(TEM).+XRD+pattern+powder+of+pumice+dominated+by+amorphous+silica.+The+results+have+been+confirmed+with+SEM-EDS+showing+that+the+silica+content+has+the+highest+percentage%2C+ie+65.88%25+for+the+sample+before+extraction+and+78.95%25+for+the+sample+after+extraction.+From+the+TEM+observation+it+shows+spherical+particles%2C+with+particle+size+of+5.8+%C2%B1+0.2+nm.+DTA-TGA+analysis+for+pumice+powder+shows+the+occurrence+of+endotherm+and+exothermic+events+accompanied+by+mass+shrinkage+along+with+warming+temperature+rise.%0D%0A%0D%0AKeywords%3A+pumice%2C+silica%2C+extraction+method%2C+and+nanostructure.%0D%0A&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+&rft.date=2017-10-16&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28959%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28959%2F2%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F28959%2F3%2FSKRIPSI%2520FULL.pdf&rft.identifier=++Trianasari%2C+1217041050++(2017)+ANALISIS+DAN+KARAKTERISASI+KANDUNGAN+SILIKA+(SiO2)+SEBAGAI+HASIL+EKSTRAKSI+BATU+APUNG+(PUMICE).++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F28959%2F