Activated carbon has been widely used as a good adsorbent. Water hyacinth may be an alternative of activated carbon. This work deals with the study of methylene blue adsorption on activated carbon as well as water hyacinth ash from aqueous solution. Batch kinetic and isotherm studies were carried out at different conditions like, contact time, methylene blue concentration etc for both adsorbents. The Freundlich and Langmuir adsorption models have been mathematical description of adsorption equilibrium and finally it has been that observed that the experimental data fitted more accurate to the Langmuir model for both cases.
Sugar cane bagasse ash, an agricultural byproduct, acts as an effective adsorbent for the removal of dyes from aqueous solution. Batch adsorption study was investigated for the removal of Acid Orange-II from aqueous solution. Adsorbents are very efficient in decolorized diluted solution. The effects of bed depth on breakthrough curve, effects of flow rate on breakthrough curve were investigated. The removal of dyes at different flow rate (contact time), bed height, initial dye concentration, column diameter, pH & temperature by Sugarcane Bagasse Ash as an adsorbent has been studied. It is found that percent adsorption of dyes increases by decreasing flow rate from 2 lit/hr to 1 lit/hr, by increasing bed height from 15cm to 45cm, by decreasing initial conc.150mg/lit to 100mg/lit, by increasing column diameter from 2.54cm to 3.5cm,by maintaining neutral pH & at temperature 45ºc than 25ºc & 35ºc.The result shows that, bagasse ash is a good adsorbent for dye effluent treatment.
Rapid industrialization and urbanization have resulted in the discharge of various toxic pollutants into the water bodies. Heavy metals constitute the major part of toxic waste let out by many industries. These metals are toxic to both human beings and aquatic life when they exceed their permissible limits. There are several methods used for the removal of heavy metals in the wastewater such as chemical precipitation, ion exchange, reverse osmosis, electro dialysis, ultra filtration and phytoremediation. But these methods are either expensive or inefficient for the removal when the metals are at high concentration. The search for new technologies involving the removal of toxic metals from wastewaters has attracted attention to adsorption. The present study aims at the removal of zinc from electroplating industrial wastewater using a cheap adsorbent, cork powder. 98% of zinc removal was found in synthetic wastewater whereas the removal percentage for the electroplating industrial wastewater was observed to be 91%.
Sugar cane bagasse ash, an agricultural byproduct, acts as an effective adsorbent for the removal of dyes from aqueous solution. Batch adsorption study was investigated for the removal of Acid Orange-II from aqueous solution. Adsorbents are very efficient in decolorized diluted solution. The effects of bed depth on breakthrough curve, effects of flow rate on breakthrough curve were investigated with the help of Thomas,Yoon-Nelson model .The removal of dyes at different flow rate (contact time),bed height by Sugarcane Bagasse Ash as an adsorbent has been studied. It is found that percent adsorption of dyes increases by decreasing flow rate from 2 lit/hr to 1 lit/hr, by increasing bed height from 15cm to 45cm.The result shows that, bagasse ash is a good adsorbent for dye effluent treatment.
Global pollution is a major problem that is yet to be solved. There are several causes of increasing pollution such as burning fossils, deforestation, increase in number of industries and vehicles etc. Humans are almost responsible for all types of pollution. The impact on global environment is becoming more serious. These impacts are discussed in this paper along with probable controlling methods of pollution.
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