Pengaruh Variasi Konsentrasi HCl Pada Pembentukan Nanosilika Berbasis Batu Apung

Abstract

The aims of this research is to determine the effect of variation concentration of HCl on chemical composition, phase formed, and particle size on pumice powder. Nanosilica is made using the solgel method with NaOH concentration 4 M, H2SO4 5 M and variation concentration of HCl 0,5; 0,75; 1; 1,25 dan 1,5 M. The XRF results showed the greatest chemical composition value in the silica pumice powder sample with a value of 77.80%. This value is higher after synthesis at the highest chemical composition value in the nanosilica sample 1,25 M HCl concentration of 87.05%. The XRD results show a diffractogram of pumice powder samples formed by anorthite and albite phases while in the nanosilica sample 1,25 M HCl concentrates are debated with the amorphous phase. The TEM results show particle size of nanosilic sample 1,25 M HCl concentration is 5 nm with average particle size (12.02 ± 3.23) nm.

Analysis of Chemical Compound Content and Magnetic Properties of Iron Sand in Rondo Woing Village, East Manggarai

“…The variables in this research are as follows: the independent variable is the sand sample, the control variables are the extraction methods (Methanol Soap Bathed and Hydrochloric Acid), and the dependent variables are the chemical compound content and magnetic properties. The research sample analysis, the sand taken from Rondo Woing, involved cleaning the sand with water to separate it from impurities like soil (Sari & Manurung, 2019). The purification process using the Methanol Soap Bathed (MSB) method aims to increase the purity level of the obtained sand.…”

Pembuatan Cairan Pembersih Lantai dengan Memanfaatkan Minyak Atsiri dan Hidrosolnya

“…Menurut Cahyani, C. dkk. [16] cairan pembersih lantai yang memberikan daya anti bakteri terbaik adalah sampel dengan konsentrasi 4% dengan perbandingan gondurekum dan hidrosol minyak sereh wangi 1:2. Menurut Ferianto dkk., [17] pada persentase minyak sereh wangi 1%, 2%, 3%, 4%, 5% dan hidrosol 98% di cairan pembersih lantai belum mampu untuk menghambat pertumbuhan bakteri Escherichia coli.…”

Extraction of Silica (SiO2) from Rare-Earth Metal Zircon (ZrSiO4) as Lithium-Ion Battery Anode Material

“…In general, extraction is a process of separating solutes with solvents where the solvent will extract the desired material without dissolving other substances [9]. Several factors affect the extraction process, including temperature, concentration, solvent solution, extraction time, and stirring [10]. Zircon (ZrSiO4) is decomposed into zirconia (ZrO2) and silica (SiO2) based on the reaction of ZrSiO4 → ZrO2 + SiO2.…”