Researches on the Treatment of Phosphorous Wastewater with Oyster Shells |
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Authors: | HUANG Mian-Li YU Yan WU Ren-Ping |
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Institution: | State Key Laboratory Breeding Base of Photocatalysis, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China |
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Abstract: | Based on the analysis of adsorptive features of oyster shells,the researches on the treatment of phosphorous wastewater with oyster shells and the effect of temperature on phosphorus removal were carried out.XRD was used to characterize the crystalline phases,and the main component of oyster shells was shown to be CaC03.When the pretreatment temperature reached 800℃,some CaC03 decomposed into CaO.As the temperature was further raised,CaO increased gradually.Via SEM testing,the oyster shell was a kind of natural porous materials.The pore wall partially collapsed from 550 to 900℃.No obvious porous structure was found at 900℃.However,without preheating,the oyster shell phosphorous removal material can not adsorb the phosphorus.Pretreatment made calcium activate,thus greatly increasing the absorption of phosphorus. |
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Keywords: | oyster shell phosphorous waste water adsorptive feature activation |
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