Preparation and characterization of ceramic nanofiltration membrane prepared from hazardous industrial waste

Abstract

Kiln rollers, which are widely used in ceramic tiles production, are usually subjected to surface grinding to remove the contaminations. The resulted fine powder is considered useless waste and a hazardous source of environmental pollution particularly as it contains health‐threatening fine free silica. In the present paper, the grind waste from kiln rollers was reused as raw material in the fabrication of nanofiltration ceramic membrane. The samples of produced ceramic membranes were formed into disks by adding 15% (by weight) organic binder solution with 2% concentration, then pressed at 35 MPa, dried and fired at temperatures range from 1100°C to 1300°C for 1 hour soaking time. It was found that the best firing temperature to produce nanofiltration ceramic membrane is 1250°C, where the ceramic membrane provides high removal of turbidity and high monovalent, divalent, and trivalent salts separation percentage.

Studies on Production of Low-Cost Ceramic Membranes and Their Uses in Wastewater Treatment Processes

“…Membranes are effective in reducing waste disposal expenses and in the recovery and recycling of materials that provide economic advantages. Membranes have become a standard procedure in recent years due to the advantages they offer [6].…”

“…In addition, for these membranes sintering temperatures are high [24]. Among these expensive materials, alumina powder and a large amount of heat required for high sintering temperatures make ceramic membranes expensive [6]. It is stated that when ceramic membrane prices are provided between $500/m 2 and $1000/m 2 , it will be possible to use it in industrial applications [31].…”

“…The use of ceramic membranes is more advantageous and effective instead of traditional steps in water treatment (coagulation, precipitation, and filtration) [6]. For this reason, studies on low-cost ceramic membranes have attracted great interest in recent years.…”

“…It is widely used in micro-filtration, ultra-filtration, and nano-filtration, especially in water and wastewater treatment [7]. In the membrane filtration method, no chemical additives are used to break the emulsions and membrane filtration method provides high Chemical Oxygen Demand (COD) removal.…”

Synthesis and characterization of tubular ceramic ultrafiltration membrane from coal fly ash

“…Nowadays, ceramic membranes are gaining the attention of many researchers and industrialists across the world due to their attractive properties such as high mechanical, chemical, and thermal stability, long life span, ease of cleaning, anti‐fouling property and durability. Ceramic membranes can also be synthesized with different porosity and pore size distribution to get the microfiltration, ultrafiltration, and nanofiltration membranes for various applications (Amin et al., 2020; Bakhtiari et al., 2011; Bazin et al., 2019; Emani et al., 2013; Fu et al., 2019; Ghosh et al., 2013; Hubadillah et al., 2016; Mouiya et al., 2019). Ceramic membranes are generally synthesized by using various industrial oxides such as, zirconia, titania, silica and alumina either individually or in combination.…”