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研究了微晶吸附体系浮选分离锌(Ⅱ)的行为及其与Fe~(3+)、Co~(2+)、Al~(3+)、Mn~(2+)、Ni~(2+)等离子分离的条件。探讨了浮选分离锌(Ⅱ)的各种影响因素,讨论了锌(Ⅱ)的浮选分离机理。结果表明,控制pH=4.0,在1.0g NaCl存在下,当0.050mol/L十八烷基三甲基氯化铵(ODAC)溶液1.00mL,0.10mol/L硫氰酸铵溶液3.50mL时,由Zn~(2+)、SCN-和ODAC+形成的不溶于水的三元缔合物(ODAC)2[Zn(SCN)4]被体系中生成的微晶物质ODAC+·SCN-定量吸附并被浮选于盐水相上,实现了Zn~(2+)与Fe~(3+)、Co~(2+)、Al~(3+)、Mn~(2+)、Ni~(2+)等离子的定量分离,据此建立了微晶吸附体系浮选分离微量锌(Ⅱ)的新方法。方法用于环境水样中微量Zn~(2+)的定量浮选分离测定,回收率为96.2%~97.9%。
The effect of flotation separation of zinc (Ⅱ) on the microcrystalline adsorption system and its interaction with Fe 3+, Co 2 +, Al 3+, Mn 2 +, Ni 2+ +) Conditions for plasma separation. The influencing factors of zinc (Ⅱ) separation by flotation were discussed. The flotation separation mechanism of zinc (Ⅱ) was discussed. The results showed that under the control of pH = 4.0, when 1.0mL of 0.050mol / L octadecyltrimethylammonium chloride (ODAC) solution and 3.50mL of 0.10mol / L ammonium thiocyanate solution in the presence of 1.0g NaCl, The water-insoluble ternary complex (ODAC) 2 [Zn (SCN) 4] formed by Zn ~ (2 +), SCN- and ODAC + is quantitatively adsorbed by the ODAC + · SCN- Flotation was carried out on the brine phase, and the effects of Zn 2+ and Fe 3+, Co 2 +, Al 3+, Mn 2 +, Ni 2+ Based on this, a new method of flotation separation of trace zinc (Ⅱ) by microcrystalline adsorption system was established. The method was applied to the quantitative flotation separation of trace Zn2 + in environmental water samples with the recoveries of 96.2% -97.9%.