X-ray Diffraction Analysis on Post Treatment of Ca-Mg-Al-Layered Double Hydroxide Slurry

Abstract

Abstract. This research objectives to study post treatment on Ca-Mg-Al-Layered Double Hydroxide (Ca-Mg-Al-LDH) slurry which was prepared from brine water by cooling treatment. The cooling rate was varied from 1 to 3 °C/min by using stirring and without stirring, and the cooling time was done at 0, 30 minutes and 24 hours. The quantitative X-ray diffraction (QXRD) was employed on Ca-Mg-Al-LDH using Le Bail refinement method. The refinement results found another Mg-Al-LDH and Ca-Al-LDH phases, such as Mg(OH) 2 , Al(OH) 3 and CaCO 3 . The highest phase composition on material Ca-Mg-Al-LDH using Le Bail refinement was showed by Al(OH) 3 .

The Capability of Biochar-Based CaAl and MgAl Composite Materials as Adsorbent for Removal Cr(VI) in Aqueous Solution

“…Figure 3 The success of the CaAl-Biochar composite preparation process refers to the JCPDS data No. 87-0493 Heraldy et al (2017), that the typical di raction of CaAl is around 2 = 11°(003) and 23°(006). The analysis results obtained, the di raction of CaAl (Fig.…”

Permanganate loaded Ca-Al-LDH coating for active corrosion protection of 2024-T3 alloy

“…A small diffraction peak at ~12º was detected for the Ca-Al-LDH specimen. This was insufficient for a sound identification, but it is located in the characteristic region of LDH phases, particularly near the (001) diffraction of Ca-Al-LDH (JCPDS #870493) [37,38].…”

“…The presence of CaCO3 (JCPDS #862334) may arise from the interaction of free aqueous Ca 2+ with CO 3 2− anions coming from atmospheric CO2 contamination during the LDH synthesis [38,41]. An additional CaCO3 peak was detected in the Ca-Al-LDH-Mn coating.…”

Calcination on Ca-Mg-Al Hydrotalcite from Brine Water and Its Characterization

“…Brine water adalah air limbah hasil samping proses desalinasi air laut dengan konsentrasi garam yang tinggi. Menurut Heraldy et al (2015Heraldy et al ( , 2017aHeraldy et al ( , 2017b, brine water yang mengandung logam Mg 2+ dan Ca 2+ dapat dimanfaatkan untuk pembuatan Ca-Mg-Al hydrotalcite yang merupakan hasil modifikasi senyawa hydrotalcite.…”

“…yH 2 O, dimana M 2+ sebagai kation divalen, M 3+ sebagai kation trivalen, A nsebagai anion penyeimbang, rasio molar (x) antara 0,2 -0,33 dan y adalah jumlah H 2 O pada interlayer. Dengan formula ini, sangat dimungkinkan untuk membuat senyawa hydrotalcite dengan dua logam seperti Mg/Al hydrotalcite (Heraldy et al, 2015), Zn/Al hydrotalcite (Heraldy et al, 2016) atau dengan tiga logam seperti Mg-Co-Al hydrotalcite (Thao and Trung, 2014) dan Ca-Mg-Al hydrotalcite (Heraldy et al, 2017a).…”