Characterization of a supported ionic liquid membrane used for the removal of cyanide from wastewater.

This work evaluated the performance of ionic liquids (ILs) in supported liquid membranes in the removal of total cyanide from wastewater. Membranes were characterized by scanning electron microscopy and contact angle measurements to study the membrane morphology and wetting ability. In particular, the effects of operational parameters such as membrane immersion time, feed-phase concentration, and pH on cyanide removal were investigated.

Optimization of cyanide extraction from wastewater using emulsion liquid membrane system by response surface methodology.

To solve the disposal problem of cyanide wastewater, removal of cyanide from wastewater using a water-in-oil emulsion type of emulsion liquid membrane (ELM) was studied in this work. Specifically, the effects of surfactant Span-80, carrier trioctylamine (TOA), stripping agent NaOH solution and the emulsion-to-external-phase-volume ratio on removal of cyanide were investigated. Removal of total cyanide was determined using the silver nitrate titration method.

Study of cyanide wastewater treatment by dispersion supported liquid membrane using trioctylamine and kerosene as liquid membrane.

A certain amount of cyanide is present in wastewater of various industrial processes, such as wet extraction of gold, coal processing, electroplating and other industries. In this work, an experimental study regarding transport of cyanide through a dispersion supported liquid membrane was performed. A model was established to describe the reaction and transport of CN(I) in the supported liquid membrane and the mass transfer kinetics equations were deduced.

[Quantum chemical study of ultraviolet and visible spectra of four amino cobalt phthalocyanin].

Four amino cobalt phthalocyanine is well known as a promising photosensitizer. In order to enrich and complete the theoretical system of structural properties and reactivity, four amino cobalt phthalocyanine was synthesized and its ultraviolet-visible spectrum was obtained by experimental research. Then the experimental spectrum was compared with that obtained from theoretical calculation by quantum chemistry.

[Adsorption behaviors of protonation modified chitosan and the analysis of spectra].

In order to improve adsorbing performance and stability of chitosan in acid simultaneously, cross-linking was employed after the protection of amino groups for improving its stability, then the protection of amino groups was removed and protonated to obtain high adsorption performance. With formaldehyde as amino-group protective agent and glutaraldehyde as cross-linking reagent, cross-linked chitosan (CCTS) was prepared by reversed phase suspension method in this paper, then it was protonated to make protonation modified chitosan adsorbent (P-CCTS). The adsorption performance of sulfate ion onto P-CCTS was firstly studied and investigated by static adsorption test.

[Quantum chemical study of molecular structure and infrared spectra of four amino cobalt phthalocyanine].

Four amino cobalt phthalocyanine is a promising photosensitizer, so the study of its spectrum is of great significance. The density functional B3LYP/3-21G* method was used in optimizing the structure of the four configurations of four amino cobalt phthalocyanine, which can calculate the energy of its most stable structure and infrared spectra in a simulated way. It is concluded that the simulated infrared spectra and the vibration obtained from experiment are in good fitting.