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Adsorptive Processing Technology Of Simulating Antimony Ore Wastewater

Posted on:2009-01-05Degree:MasterType:Thesis
Country:ChinaCandidate:H M GuFull Text:PDF
GTID:2121360245951566Subject:Environmental Science
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According to the announcement named "Mineral commodity summaries " , which was pubished by American geology Investigation Bureau in 2003, it reports that there are 1.8 million t antimony reserves in the world and 790,000 t antimony reserves in China, occupies the first place of the world. Our country is the great nation which produces and exports antimony. the antimony ore mainly and centrally distributes in Hunan, Guizhou, Guangxi , as well as the south provincial area. The Wastewater which contains much antimony and arsenic virulent element will be produced massively during the process of the ore excavates and selects. The water not only has caused the serious pollution to eht local water environment, but also the serious harm to inhabitants health in the nearby and the down stream of the minning area if it had not been disposed after any processing and disperse directhly into surface water, the rivers and reserviors. However, compares with other kind of type mine Wastewater, at present we also extremely are limited in view of the antimony mine waster water processing literature report, and lackes the mature technology which may supply the applicationTherefore, this research plans to develop one new technology which based on highly effective, inexpensive absorbent antimony ore Wastewater processes. Through the adsorption experiment, we screen the highly effective antimony adsorption material from sticks the soil type absorbent, the reject absorbent, the biological absorbent ( this only conducts research to reject absorbent;through batch adsorption experiment, highly effective absorbent adsorption antimony dynamics, uniform temperature adsorption, hot dynamics and adsorption mechanism; In this foundation, through physics, chemistry method carries on the modification to the absorbent, and enhance its adsorption efficiency.The findings indicated that, 100℃dries CL2007# [ note ], 400℃ and 800℃high temperature modified CL2007#, is 20% hydrochloric acid modified CL2007# adds water with the density the antimony to have the varying degree removeing, removes effect 100℃to dry 20% hydrochloric acid modification 400℃high temperatures modifications 800℃high temperatures modifications. Therefore, the present paper mainly studies the influence factor ,which is 100℃to dry the CL2007# processing antimony ore Wastewater, seeks the best adsorption condition.Obtains through the batch experiment, 100℃drying CL2007# in pH=2, the Sb solution concentration is 200mg/L, the reaction temperature is 35℃, the reaction time is under the 45min condition, tends to the balance to the antimony adsorption (Qe =17.92mg/g). To look from the correlation coefficient of the uniform temperature adsorbs three equations simulations that, Langmuir equation fitting result best, the Freundlich equation fitting result is next, but the Temkin equation fitting result is worse. The driven mechanics equation simulation correlation coefficient looked that, only has draws up two levels of speeds equations fitting the result most to conform to the empirical datum. From this explained CL2007# is through function and so on physisorption, superficial complexing adsorption, ionic exchange and flocculent precipitate removes in the antimony ore Wastewater the antimony ion.Polluted CL2007# the antimony the regeneration optimization condition is 0.025~0.075mol/L EDTA, may adsorb the antimony after EDTA Desorption CL2007# the quantity is 16.25mg/g again, approaches initial adsorption value Qe =17.92mg/g.
Keywords/Search Tags:Antimony ore Wastewater, CL2007#, antimony ion, adsorption
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