The effect of temperature on the desorption of gold cyanide from activated carbon

Deventer, J.S.J. van; Merwe, P. F. Van Der

doi:10.1016/0040-6031(93)80527-h

Cited by 9 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Commonly used desorption agents in this process are methanol, ethanol, isopropanol, acid and base solution, NaCl, HNO3, Fenton, and H2O2 which depend on the type of adsorbate and adsorbent. Other studies stated that temperature process and contact time also affect the desorption efficiency [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Desorption and Re-Adsorption of Procion Red MX-5B Dye on Alumina-Activated Carbon Composite

et al. 2018

View full text Add to dashboard Cite

The alumina-activated carbon has the ability to adsorb and desorb the procion red MX-5B. The research evaluated the influence of desorption agent, contact time, and temperature on desorption process of procion red MX-5B dye with alumina-activated carbon composite and the adsorption capacity of the composite after desorption process. The desorption agents used in desorption process were solution with pH 2−10, H2O2 30 % (v/v), methanol 70% (v/v) and ethanol 70% (v/v) 2-10, H2O2 30% (v/v), metanol 70% (v/v) dan etanol 70% (v/v) desorpsi, adsorpsi ABSTRAK Komposit alumina-karbon aktif mempunyai kemampuan mengadsorpsi dan mendesorpsi zat warna procion merah MX-5B. Penelitian ini mempelajari pengaruh reagen pendesorpsi, waktu kontak, dan suhu pada proses desorpsi zat warna procion merah MX-5B dari komposit alumina-karbon aktif dan kemampuan adsorpsi komposit alumina-karbon aktif setelah proses desorpsi. Reagen pendesorpsi yang digunakan pada proses desorpsi meliputi larutan dengan pH pada interval

show abstract

Section: Introductionmentioning

confidence: 99%

Desorption and Re-Adsorption of Procion Red MX-5B Dye on Alumina-Activated Carbon Composite

et al. 2018

View full text Add to dashboard Cite

show abstract

“…45 Thus, it is possible that restructuring competes with the predicted decomposition mechanism in which the as-adsorbed CN/ Au{111} is hydrolyzed by atmospheric water vapor. 42 Segmentation analysis, 46−49 which takes into account all information in the images, was used to highlight the information pertaining to the ribbon orientation of the annealed CN/Au{111} system. Ribbon domains were observed to be rotationally offset from one another, separated by topologically distinct boundaries as shown in Figure 3A, a STM image of annealed CN/Au{111}.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…This observation agrees with the established temperature dependence of gold dissolution, which reports the decomposition of cyanide in aqueous solutions with gold at temperatures above 100 °C; − however, the thermal decomposition of polymeric AuCN complexes has been reported to occur at temperatures above 350 °C . Thus, it is possible that restructuring competes with the predicted decomposition mechanism in which the as-adsorbed CN/Au{111} is hydrolyzed by atmospheric water vapor …”

Section: Resultsmentioning

confidence: 99%

Hexagons to Ribbons: Flipping Cyanide on Au{111}

et al. 2016

View full text Add to dashboard Cite

Cyanide monolayers on Au{111} restructure from a hexagonal close-packed lattice to a mixed-orientation "ribbon" structure through thermal annealing. The new surface structure loses most of the observed surface features characterizing the initial as-adsorbed system with "ribbon" domain boundaries isolating rotationally offset surface regions where the orientation is guided by the underlying gold lattice. A blue shift to higher frequencies of the CN vibration to 2235 cm with respect to the as-adsorbed CN/Au{111} vibration at 2146 cm is observed. In addition, a new low-frequency mode is observed at 145 cm, suggesting a chemical environment change similar to gold-cyanide crystallization. We discuss this new structure with respect to a mixed cyanide/isocyanide monolayer and propose a bonding scheme consisting of Au-CN and Au-NC bound molecules that are oriented normal to the Au{111} surface.

show abstract

“…The beads were shaken in a NaCl solution at a speed of 150 rpm for two-three days with constant heating at 30 °C. Mild heat, as previous experimental work [ 77 , 78 ] has shown an acceleration in the desorption of templates while taking into account the degradation temperatures of the polymer, as increasing the heat increases the eluent dissociated ions mobility and its electrostatic interactions with ion templates in the pores. Then, ion-imprinted beads were washed with deionized water for two days and tested for the detection of I − ions in the washing deionized water by the Ultraviolet–visible (UV–vis) spectra measured using UV–vis spectrometer UV-1900i (Shimadzu) as shown in Fig.…”

Section: Methodsmentioning

confidence: 91%

Iodide ion-imprinted chitosan beads for highly selective adsorption for nuclear wastewater treatment applications

Ismail,

Wang,

Al Shehhi

et al. 2024

Heliyon

View full text Add to dashboard Cite

The effect of temperature on the desorption of gold cyanide from activated carbon

Cited by 9 publications

References 3 publications

Desorption and Re-Adsorption of Procion Red MX-5B Dye on Alumina-Activated Carbon Composite

Desorption and Re-Adsorption of Procion Red MX-5B Dye on Alumina-Activated Carbon Composite

Hexagons to Ribbons: Flipping Cyanide on Au{111}

Iodide ion-imprinted chitosan beads for highly selective adsorption for nuclear wastewater treatment applications

Contact Info

Product

Resources

About