Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Abstract

Indonesian kaolin was used as precursor for synthesis of sodalite. Synthesis parameters were optimized by varying the Si/Al ratios, stirring and aging conditions, and water composition. X-ray diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope-Energy Dispersive Xray (SEM-EDX), and Particle Size Analyzer (PSA) were used to characterize sodalite. The potential of sodalite as adsorbent for heavy metal Pb 2+ ions removal from waste water was investigated in this work. The uptake adsorption capacities of sodalite was 90-100 mg/g from synthesized sodalite crystallized for 24 and 48 hours, and commercial silica. The kinetic of Pb 2+ adsorption was a pseudo second order reaction and the adsorption coefficients was followed Langmuir adsorption isotherm. ous damage to nervous system, kidney function and reproduction organ [1]. It also affects hematopoietic, renal, gastrointestinal, and cardiovascular [2]. Removal of lead from waste water using reverse osmosis, precipitation, ion exchange and electro dialysis have been investigated and were proven effective [1,[3][4][5][6]. However, the processes were economically demanding and the waste deposit resulted from the removal processes were still required for additional disposal treatment.Sorption using solid adsorbents offers a better solution for waste water treatment which in-

Controlling the Size and Porosity of Sodalite Nanoparticles from Indonesian Kaolin for Pb2+ Removal

“…Although the initial molar composition of sodalite was similar, changing the temperature and the time for crystallization enhanced the adsorption capacity of Pb 2+ . The capacity of sodalite adsorption in this study was greater than that in our previously reported studies, at 97.15 mg/g [16]. The formation of stable silicate particles was crucial to ensure efficient interaction with CTABr for the formation of larger mesopore cavities.…”

“…Zeolite has a uniform pore structure and high surface area to ensure efficient diffusion and adsorption of large pollutants [14,15]. Sodalite is a zeolite with good adsorption ability [16] that can be used as a catalyst or catalyst support [17].…”

Insight into Structural Features of Magnetic Kaolinite Nanocomposite and Its Potential for Methylene Blue Dye Removal from Aqueous Solution

“…Methylene blue (MB) is an example of cationic synthetic dye commonly used in the textile and pharmaceutical industry [1]. Exposure to excessive MB could cause harmful ef-Clay minerals like bentonite, palygorskite, and kaolinite have received great interest either as a catalyst or pollutant adsorbent due to its non-toxicity, inexpensive and high availability [3,5,6]. Malaysia has approximately 112 million tons of kaolinite reserve [7,8] with a total export value of Malaysian Ringgit 26 million (approximately USD 6 million) in 2013 [8].…”