User talk:P KAVANA

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Removal of Dyes
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REMOVAL OF DYES FROM WATER USING WASTE MATERIALS
ABSTRACT In the present world availability of potable water is reducing day by day. The present scenario will worsen more in future. Waste water management is very much required for water conservation and to reduce water pollution. The colour in wastewater is mainly due to the carcinogenic and mutagenic organic dyes in wastewater. So removal of these dyes from industrial wastewater is very much essential.Dyes are released from industries like textile industry leather, paper, plastic etc. Generally activated carbon is used for removing pollutant from water which is quite expensive and regeneration of carbon is quite expensive. So we can use materials like seed husk of bengal gram, sawdust orange peel etc.(which are waste materials) instead of activated carbon. THEORY ADSORPTION is the process adopted here which is the surface phenomenon.There are two types of adsorption namely PHYSISORPTION and chemisorption.In this process we are using physisorption. The common dyes present in wastewater are METHYLENE BLUE AND METHYL ORANGE .METHYLENE BLUEis a basic aniline dye and mainly used in textile industries.Methyl orange is an acidic dye, used in paper industries, food industries etc.

PROCEDURE The adsorbent used such as saw dust, bengal gram husk should be washed with water and dried for some days under sunlight.Then they were grounded to fine powder so as to increase the surface area( as more the surface area more is the adsorption). The water containing these dyes were poured on the adsorbate and left for some time undisturbed.later the content is filtered.

RESULT It was found that sawdust was more effective in removing methylene blue when compared with bengal gram husk and both failed in removing methyl orange. So we can conclude that not all the dyes can be removed from the same material.Particular dyes can be removed by particular materials. thid is due to the ionic interactions between the ions present in adsorbate and adsorbent.

REMOVAL OF DYES FROM WATER USING WASTE MATERIALS
ABSTRACT In the present world availability of potable water is reducing day by day. The present scenario will worsen more in future. Waste water management is very much required for water conservation and to reduce water pollution. The color in wastewater is mainly due to the carcinogenic and mutagenic organic dyes in wastewater. So removal of these dyes from industrial wastewater is very much essential. Dyes are released from industries like textile industry leather, paper, plastic etc. Generally activated carbon is used for removing pollutant from water which is quite expensive and regeneration of carbon is quite expensive. So we can use materials like seed husk of Bengal gram, sawdust orange peel etc.(which are waste materials) instead of activated carbon.

THEORY Adsorption is the process adopted here which is the surface phenomenon. There are two types of adsorption namely physisorption and chemisorption. In this process we are using physisorption. The common dyes present in wastewater are ''methylene blue and methyl orange”. Methylene blue is a basic aniline dye and mainly used in textile industries. Methyl orange is an acidic dye, used in paper industries, food industries etc.''

PROCEDURE The adsorbent used such as saw dust, Bengal gram husk should be washed with water and dried for some days under sunlight. Then they were grounded to fine powder so as to increase the surface area (as more the surface area more is the adsorption). The water containing these dyes were poured on the adsorbate and left for some time undisturbed. Later the content is filtered.

RESULT 

It was found that sawdust was more effective in removing methylene blue when compared with Bengal gram husk and both failed in removing methyl orange. So we can conclude that not all the dyes can be removed from the same material. Particular dyes can be removed by particular materials. this is due to the ionic interactions between the ions present in adsorbate and adsorbent.

SOLAR ECLIPSE
MYTHS According to indian culture, Rahu is known for causing eclipses. It is believed that Rahu will swallow the sun and cause eclipse.Greeks believed that eclipse is the sign of angry or quarreling between the gods.The popular misconception is that solar eclipses can be danger to the pregnant women and their unborn children so that they are advised to stay indoors. Many people keep fast during eclipse due to belief that any food cooked during this time will be poisonous and impure.The child which is born during solar eclipses would turn into mice and if solar eclipse occurs six months after or before the birth of the child then,it is believed that it will have very dangerous death. Not all superstitions surrounding solar eclipses are about doom. In italy, it is believed that flowers planted during solar eclipse are brighert and colourful than planted at the normal conditions.

SCIENCE BEHIND SOLAR ECLIPSE