Preparation and characterization of low cost flat ceramic membranes from easily available potters’ clay for dye separation

Abstract

In the present day scenario, the crisis of safe drinking water is an extremely serious issue across many parts of the globe and needs efficient methods to overcome this problem. The effort made in this study is to develop a method to prepare a ceramic membrane with locally available cheap compositions such as potters' clay, stone dust and tea waste materials for efficient adsorptive dye removal from water. The preparation of ceramic membrane was carried out by a paste pressing method and sintered at an optimized temperature of 900 • C to obtain flat ceramic membranes of 42 mm in diameter and 3±0.5 mm thickness with good thermal and chemical stabilities with 52.51% porosity and average pore size of 0.49 μm. The membrane was capable of decolouring methylene blue and congo red from water with good efficiency and the used membrane was regenerated by calcining at 400 • C for 30 min without much loss of its efficiency. Development of newer advanced products with the available local resources may be another way to sustain the small scale industry and livelihood of the people around.

Fabrication, characterization, fouling behavior and performance study of ceramic microfiltration membranes for oily wastewater treatment

“…This analysis also confirms that the membrane sample was highly stable at high temperatures. These findings are in good agreement with other published results [33,35,36].…”

“…code: 00.010.0173), and quartz and MAZ membrane have only a corundum phase. For these membranes, the minor phases are mullite and cristobalite[33]. The quartz and cristobalite phases can be washed with a strong alkali solution (20 wt% NaOH) in order to increase in the porosity of the membranes.…”

Characterization and Beneficiation of Ethiopian Kaolin for use in Fabrication of Ceramic Membrane

“…An increase in final firing temperature leads to a decrease in the porosity of the flat ceramic bodies down to a value of 14.96 ± 0.62 %. A similar trend was reported in the literature for kaolin based ceramic specimens [1], [63], [88]- [90], [64], [76], [79], [81], [84]- [87] and other types of clay-based ceramic specimens [74], [78], [91], [92]. Finally, the porosity of a flat ceramic specimen is directly related to water absorption, both properties show a similar trend in the firing temperature range 700-1100 o C. The chemical stability was estimated in terms of weight loss after immersing the flat ceramic specimen in acid and alkali solution.…”

Use of carbon coated ceramic barriers for adsorptive removal of fluoride and permanent immobilization of the spent adsorbent barriers

“…Preparation of clay based flat ceramic substrates is reported in some of our previous works [18]. Briefly, a 3:5:4 ratios of finely ground and sized Potters' clay (DKC) obtained from Dhekial region of Assam, India, Stone Quarry dust (SQD) supplied by local suppliers, and Tea dust (TD) obtained from local tea industry was taken and prepared a paste by adding 10 mL water to 45 g of the raw mixture.…”