Pillared Based Clays as Catalysts for Wastewater Treatment
Clays have been used extensively for a number of applications, ranging from traditional to professional. Because they are environmentally friendly, clay minerals have received considerable attention in recenttimes due to their low-cost, high selectivity, reusability and operational simplicity. Porosity and stability of these clay materials could be improved by a process known as pillaring, which leads to materials known as pillared interlayered clays (PILCs). Pillared clays results to enhanced pore volume, surface area, thermal and mechanical stability and improved catalytic activity when compared to the original clays. These enhancement makes them suitable for use as adsorbents and catalysts. Available literature recently has shown the great potential and viability of pillared clays as catalysts in a number of processes such as catalytic reactions and in waste water treatments.This review, therefore, focus on the use of pillared clays as catalysts for the treatment of wastewater containing different types of contaminants such as chlorophenols bearing effluents which are among the most hazardous pollutants in industrial wastewater and contaminated groundwater, being highly resistance to biodegradation. Their conversion into environmentally harmless species is a current need.
Keywords - Pillared Clays; Wastewater, Effluents; Chlorophenols, Biodegradation.