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采用蟹殼粉（100目）作為吸附劑，對(duì)牡蠣水解液中的Cd2+、Cr2+、Pb2+以及As等重金屬離子進(jìn)行了靜態(tài)和動(dòng)態(tài)吸附試驗(yàn)，分別從蟹殼粉投加量、溶液初始pH值、脫除震蕩時(shí)間等方面對(duì)蟹殼粉的吸附性能進(jìn)行了研究。試驗(yàn)結(jié)果表明，蟹殼粉對(duì)于牡蠣水解液中的重金屬離子吸附性能良好，脫除率均能達(dá)到50%左右。在溶液初始pH分別為5,5,4,6時(shí)，蟹殼粉對(duì)Cd2+、Pb2+、Cr2+、As的脫除效果最好，脫除率分別為74.95%，69.53%，54.51%和95.95%。蟹殼對(duì)Cd2+、Cr2+、Pb2+以及As的吸附符合Langmuir吸附等溫模型。獲得的動(dòng)力學(xué)數(shù)據(jù)表明，金屬吸附速度快，當(dāng)吸附時(shí)間超過(guò)60min后，吸附較慢，當(dāng)吸附到達(dá)240min時(shí)，吸附趨于完成。較高的相關(guān)系數(shù)符合Ho Y S 二級(jí)吸附動(dòng)力學(xué)模型。 關(guān)鍵詞：蟹殼粉 重金屬 鉻 鎘 鉛 砷 脫除率 吸附量 |
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求調(diào)劑，一志愿:南京航空航天大學(xué)大學(xué) ，080500材料科學(xué)與工程學(xué)碩，總分289分
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jingjing1005
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wypward(金幣+1):歡迎新蟲，謝謝參與 2010-06-03 17:35:26
kitten311(金幣+20, 翻譯EPI+1):嗷嗷感動(dòng)啊~~ 2010-06-04 21:38:00
kitten311(金幣+35): 2010-06-06 21:57:10
wypward(金幣+1):歡迎新蟲，謝謝參與 2010-06-03 17:35:26
kitten311(金幣+20, 翻譯EPI+1):嗷嗷感動(dòng)啊~~ 2010-06-04 21:38:00
kitten311(金幣+35): 2010-06-06 21:57:10
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Static and dynamic adsorption experiments were performed to the Cd2 +, Cr2 +, Pb2 + and other heavy metal ions in the hydrolysis of oysters with crab shell powder (100 mesh) as adsorbent to study the impacts of crab shell powder dosage, initial pH value of solution and time for shock removal on absorption properties of crab shell powder. The results showed that crab shell powder had strong ability of adsorbing heavy metal ions in the hydrolysis of oysters and the removal rate can reach 50%. Best removal effect reached at the Initial pH in the solution of 5,5,4,6 respectively, in particular for the ions of Cd2 +, Pb2 +, Cr2 +, and the removal rate for each of the four was 74.95%, 69.53%, 54.51% and 95.95% respectively . The adsorption of crab shell powder for Cd2 +, Cr2 +, Pb2 + conformed to the Langmuir isotherm model. The kinetic data obtained showed that the metal adsorption was at high speed, but it slowed down after 60min and finished at 240min. The absorption coincided with Ho YS 2 adsorption kinetic model with high correlation coefficient. Keywords: crab shell powder, heavy metal, Cr, Cd, Pb, As, removal rate, absorption dosage |
2樓2010-06-03 16:48:01
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