所属单位：

化学与化工学院

发表刊物：

Water Science and Technology（SCI）

关键字：

中文关键字：大块液膜，氰化废水，传输动力学，三正辛胺，英文关键字：bulk liquid membrane, cyanide wastewater, transpor

摘要：

The transport of cyanide from wastewater through a bulk liquid membrane (BLM) containing tricaprylamine (TOA) as a carrier was studied. The effect of cyanide concentration in the feed solution, TOA concentration in the organic phase, the stirring speed, NaOH concentration in the stripping solution and temperature on cyanide transport was determined through BLM. Mass transfer of cyanide through BLM was analyzed by following the kinetic laws of two consecutive irreversible first-order reactions, and the kinetic parameters (k1, k2, Rmax m , tmax, Jmax a , Jmax d ) were also calculated. Apparently, increase in membrane entrance (k1) and exit rate (k2) constants was accompanied by a rise in temperature. The values of activation energies were obtained as 35.6 kJ/mol and 18.2 kJ/mol for removal and recovery, respectively. These values showed that both removal and recovery steps in cyanide transport is controlled by the rate of the chemical complexation reaction. The optimal reaction conditions were determined by BLM using trioctylamine as the carrier: feed phase: pH 4, carrier TOA possession ratio in organic phase: 2% (V/V), stripping phase concentration of NaOH: 1% (W/V), reaction time: 60 min, stirring speed: 250 r/min. Under the above conditions, the removal rate was up to 92.96%. The experiments demonstrated that TOA was a good carrier for cyanide transport through BLM in this study.

备注：

李国平

合写作者：

刘妮娜

第一作者：

于丽花,薛娟琴,李国平

论文类型：

期刊论文

卷号：

卷：73

期号：

期：12

页面范围：

页：2888-2895

是否译文：

否

发表时间：

2016-11-01