Possibilities of chromium (III) separation from acid solution using the double-carrier supported liquid membrane (DCSLM)

被引:3
作者
Rajewski, Jakub [1 ,2 ]
Rajewska, Paulina [3 ]
机构
[1] New Chem Synth Inst, Nitr Acid Technol Dept, Al Tysiaclecia Panstwa Polskiego 13a, PL-24110 Pulawy, Poland
[2] Warsaw Univ Technol, Fac Chem & Proc Engn, Warynskiego 1, PL-00645 Warsaw, Poland
[3] Natl Res Inst, Inst Sustainable Technol, Ind Biotechnol Dept, Pulaskiego 6-10, PL-26600 Radom, Poland
关键词
chromium (III) separation; Cyanex272; D2EHPA; supported liquid membrane; TANNING WASTE-WATER; HEAVY-METALS; REMOVAL; TRANSPORT; RECOVERY;
D O I
10.2166/wst.2017.095
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper describes the problem of recovery and reusing chromium from aqueous solutions. The authors studied a novel double-carrier supported liquid membrane system (DCSLM) with di(2-ethylhexyl) phosphoric acid (D2EHPA) and bis(2,4,4-trimethyl) phosphinic acid (Cyanex272) as a carrier of Cr(III) ions as a method to separate chromium (III) from acid solutions. As a result, they confirmed that the presence of two carriers in the DCSLM with the most effective carrier concentration ratios, leads to approximately three times shorter pertraction, compared to a process conducted with the D2EHPA only. It was found that synergistic effect is independent of the initial concentration of chromium in the feed solution. Higher initial concentrations of Cr(III) >= 0.01 mol dm(-3) cause high 'exhaustion' of active carrier molecules at the interface. Moreover, the authors observed the increase in viscosity in the membrane phase and process inhibition. It was found that efficiency of separation of chromium ions from aqueous solutions using a liquid membrane depends on the transport rate for these ions in the membrane (ions pertraction). Therefore, it was concluded that the pertraction stage of the Cr(III) ions limits the efficiency of the whole separation process.
引用
收藏
页码:2358 / 2368
页数:11
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