Diverse Technology and Methods for Dye Treatment

摘要

Adsorption methods are primarily used for the dye removal which are not easily degradable and are the main cause for water pollution. There are various latest technologies available for the removal of dye. Most commonly used method is adsorption and the material used is the activated carbon, but their usage is restriced due to its high cost. As such, alternative non-conventional sorbents have been investigated. It is well-known that natural materials, waste materials from industry, agriculture and biosorbents can be obtained and employed as inexpensive sorbents. In this review, an extensive list of sorbent literature has been compiled. The waste material from the industries, agricultural waste is mainly employed for the removal of dye due to large availability and its low cost. The review paper comprises (i) a critical analysis of these techniques; (ii) describes their process, advantages and limitations; and (iii) various mechanisms involved in the process.