Layered Double Hydroxides in the Remediation and Prevention of Water Pollution
Increasing efforts are being made worldwide to prevent pollution, and where it has arisen to remediate the effects. A particular concern is ensuring the purity of water supplies. Layered double hydroxides (LDHs) and their calcined products (CLDHs) have received much attention in this
regard. By dint of their ability to undergo anion exchange, surface adsorption, reconstruction, and adsolubilization, these materials have great potential in the removal of pollutants from effluvium streams, and/or to provide sustained and targeted release of functional anions. They can also
be used as catalysts or catalyst supports. A range of wastewater clean-up technologies have been proposed applying LDHs and CLDHs as sorbents and catalysts. This review outlines the latest research into the use of these materials in water treatment. The direct uptake of pollutants through
ion exchange, reconstruction and adsolubilization are considered in detail, followed by the use of LDHs and CLDHs as catalysts for pollutant degradation. Finally, the possible roles of LDHs and CLDHs in advanced formulations to deliver agrochemicals in a sustained manner, thereby preventing
leaching and eutrophication, are considered.
Keywords: ADSORPTION TECHNOLOGIES; AGROCHEMISTRY; CATALYTIC TECHNOLOGIES; HYDROTALCITE; LAYERED DOUBLE HYDROXIDE; WASTEWATER TREATMENT
Document Type: Review Article
Publication date: 01 March 2014
- ENERGY AND ENVIRONMENT FOCUS is a multidisciplinary peer-reviewed international research journal consolidating research activities in all experimental and theoretical aspects of energy and environment with an interdisciplinary approach. The research topics include the preparation and characterization of advanced functional materials and their utilization in various energy and environmental applications, to name a few; fuel cells, batteries, solar cells, light emitting diodes, solar cells, optoelectronic devices, thermoelectric, clean energy, bio-fuels and bio-refineries, supercapacitors, hydrogen energy (storage and generation), geothermal energy, nanogenerators, self-powered devices and systems, catalysis, biomass and bioenergy, static and dynamic energy conversion; energy efficiency and management, nuclear energy, fossil fuels, geothermal, wind energy, electrolysis, and photothermal devices, environmental science and technology (environmental chemistry, physics biology and engineering) including climate change, greenhouse gases and global warming, ecology, environmental toxicology, industrial wastewater and sewage treatment, geosciences, atmospheric, terrestrial and aquatic environments, pollution and environmental control, hazardous substances, radioactive contamination, noise pollution, effects of air, water, and soil contaminations on human health, environmental public health policies, soil environmental management and technologies, environmental policies, rules and regulations, conservation of natural resources, and all aspects of theoretical modeling related with energy and environment.
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