本文關(guān)鍵詞：微乳液萃取分離廢渣中的重金屬　出處：《沈陽(yáng)理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 微乳液 萃取 分離 鋅、銅、鈷

【摘要】：本課題主要研究微乳液在萃取分離重金屬方面的應(yīng)用。采用Triton X-100/正丁醇/正庚烷/水/P507/氫氧化鈉組成的微乳液體系對(duì)水相中的Zn2+、Cu2+和Co2+進(jìn)行萃取分離研究。確定了萃取分離鋅和銅鈷的最佳工藝條件為:Triton X-100:正丁醇:正庚烷:水:P507:氫氧化鈉=2:42:1.7:1.8:0.7:0.8(體積比),其中氫氧化鈉溶液濃度為1.9mol/L,外水相p H為2.5,乳水比為1:4,外水相(體積為20m L)中加入0.5g Na Cl,水浴溫度60℃,水浴萃取時(shí)間3min,在此條件下,鋅的最佳萃取率高達(dá)87.6%,而銅和鈷分別只有12.3%和7.9%,βZn/Cu和βZn/Co為50.4和82.3,鋅和銅鈷的分離效果很好。研究了Triton X-100乳液體系、Triton X-100 P507微乳液體系、油酸P507微乳液體系對(duì)銅離子和鈷離子的萃取分離效果,采用油酸/正丁醇/P507/氫氧化鈉/正庚烷組成的微乳液體系對(duì)水相中的Cu2+和Co2+進(jìn)行萃取分離研究。確定了萃取分離銅鈷的最佳工藝條件為:油酸:正丁醇:P507:氫氧化鈉:正庚烷=0.2:10:0.8:1:1(體積比),其中氫氧化鈉濃度為1.8mol/L,外水相p H為3.5,乳水比為1:4,外水相(體積為20m L)中加入0.5g Na Cl,水浴溫度50℃,水浴萃取時(shí)間4min,在此條件下,銅的最佳萃取率高達(dá)92.7%,而鈷僅有9.5%,βCu/Co為120.9,并將該方法應(yīng)用于冶煉廢渣中銅鈷的分離,銅和鈷的分離效果非常好。最后,通過(guò)上述所得到的微乳液對(duì)實(shí)際的冶煉廢渣樣品進(jìn)行了萃取分離,其中鋅的萃取率達(dá)到87.3%,銅萃取率高達(dá)91.3%,而鈷的萃取率只有9.1%。
[Abstract]:The application of microemulsion in extraction and separation of heavy metals was studied in this paper. Triton. X-100 / n-butanol / n-heptane / water / P507 / sodium hydroxide microemulsion system for Zn2 in aqueous phase. Cu2 and Co2 were used to study the extraction and separation of zinc and copper cobalt. The optimum conditions were determined as follows: 1 Triton X-100: n-butanol: n-heptane: water: P507. Sodium hydroxide 2: 42: 1. 7: 1. 8: 0.7: 0.8. Volume ratio. The concentration of sodium hydroxide solution is 1.9 mol / L, the pH of external water phase is 2.5, the ratio of milk to water is 1: 4, and 0.5 g NaCl is added to the external water phase (20 mL volume). The optimum extraction rate of zinc was up to 87.6, while copper and cobalt were only 12.3% and 7.9%, respectively, under the conditions of water bath temperature 60 鈩，

本文編號(hào)：1429408