Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : JOURNAL ONLINE OF PHYSICS

THE EFFECT OF MILLING ON PARTICLE SIZE AND CRYSTAL STRUCTURE IN MECHANOCHEMICAL PROCESSING OF LEAD-CONTAMINATED SYNTHETIC SOIL Lagowa, Muhammad Ikrar; Maulana, Lucky Zaehir
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.43457

Abstract

crystal structure, which can immobilize lead and mitigate environmental contamination. Milling as a mechanical treatment plays a critical role in determining the final properties of the processed material. This study investigates the role of particle size and crystal structure in the mechanochemical treatment of lead-contaminated synthetic soil. Two synthetic soil samples were prepared in the laboratory, including lead contamination. Milling of the contaminated soils was carried out in a planetary ball mill. The samples were analysed using a lasersizer and X-Ray Diffraction (XRD) to investigate the change in particle size and identify the crystalline phase after milling. The results showed that milling initially reduced particle size, but further milling resulted in particle agglomeration, which was reflected by partial amorphization in soil samples after milling. Other than the partial amorphization, no phase change was detected in the crystal structure. In conclusion, milling resulted in the change of particle size but did not affect the crystalline phase of the milled sample, despite of partial amorphization.
ANALISIS VARIASI KONSENTRASI EKSTRAK DAUN PANDAN (Pandanus amaryllifolius) PADA GREEN SYNTHESIS NANOPARTIKEL MAGNETIT (Fe3O4) BERBASIS PASIR BESI (IRON SANDS) SUNGAI BATANG HARI Berliana, Aulia Putri; Deswardani, Frastica; Pujaningsih, Febri Berthalita; Anggraini, Rista Mutia; Maulana, Lucky Zaehir
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 3 (2025): JOP (Journal Online of Physics) Vol 10 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i3.46458

Abstract

Telah dilakukan penelitian tetang green synthesis nanopartikel berbasis pasir besi Sungai Batanghari dengan variasi konsentrasi ekstrak daun pandan (Pandanus Amaryllifolius). Penelitian ini bertujuan untuk mengetahui pengaruh dari variasi konsentrsi ekstrak daun pandan terhadap nanopartikel Fe3O4. Uji karakterisasi yang lakukan adalah uji XRD dan uji UV-Vis. Hasil analisis  uji XRD menunjukan bahwa pola difraksi 2θ yang terletak pada sampel berturut-turut Fe3O4 , NP1, NP2, NP3, yaitu pada  35,51˚; 35,41˚; 35,49˚; dan 35,53˚ dengan bidang kristal (311). Ukuran kristal berturut-turut 13,83 nm; 26,80 nm; 13,86 nm; dan 25,30 nm. Hal ini menunjukan bahwa pada sampel NP1 dan sampel NP2 memiliki ukuran kristal lebih besar dibandingkan dengan sampel NP2. Nilai dari sampel NP2 hampir sama dengan ukuran kristal dari Fe3O4 tanpa tambahan ekstrak. Berdasarkan uji karakterisasi UV-Vis nanopartikel Fe3O4 menunjukan energy gap (Eg) yang elalui metode touc plot. Dengan nilai direct badgap berturut-turut 4,2 eV;  4,8 eV; dan 4,4 eV untuk sampel Fe3O4 , NP1, NP3 . Nilai indirect bandgap berturut-turut 3,9 eV; 4,1 eV; dan 3.7 eV untuk sampel Fe3O4 , NP1, NP3.