Silver, gold and palladium leaching from electronic scrap using bromine- bromide solution

Objective: The present study highlights the development of a method to synthesize copper nanoparticles (CuNPs).Methods: CuNPs were developed using 0.01 M copper penta sulfate and 0.11 M of ascorbic acid (AA) and 0.03 M of cetyl trimethyl ammonium bromide solution. The synthesized CuNPs were differentiated through filtration and washed by water (deionized). CuNPs were kept in dialysis bag 70 KD in a 250 mL glass beaker along with distilled water. The assembly was kept on a magnetic stirrer for 24 h at 500 rpm. Then, the dialysis bag containing CuNPs solution was filtered by a filter assembly with 0.2 μm nylon filter. The filtered CuNPs were spray dried with the help of spray drier.Results: The prepared CuNPs were found to be 440 nm with zeta potential of −10 mV and polydispersity index 0.314.Conclusion: The investigation deciphers the promising and material technique to synthesis of CuNPs by methods for synthetic reduction utilizing strategy using AA (0.2 M) and sodium hydroxide (1 M), and Syloid 244FP.

Download Full-text

E&HS aspects on metal recovery from electronic scrap

IEEE International Symposium on Electronics and the Environment, 2003. ◽

10.1109/isee.2003.1208097 ◽

2003 ◽

Cited By ~ 4

Author(s):

T. Lehner

Keyword(s):

Metal Recovery ◽

Electronic Scrap

Download Full-text

Reuse of a purified solution of cetyltrimethylammonium bromide for the synthesis of gold nanorods

Izvestiya of Saratov University New Series Series Chemistry Biology Ecology ◽

10.18500/1816-9775-2021-21-4-391-398 ◽

2021 ◽

Vol 21 (4) ◽

pp. 391-398

Author(s):

Yuliya D. Gudova ◽

◽

Vyacheslav I. Kochubey ◽

Alexander A. Skaptsov ◽

◽

...

Keyword(s):

Mathematical Model ◽

Optical Properties ◽

Form Factor ◽

Gold Nanorods ◽

Cetyltrimethylammonium Bromide ◽

The Third ◽

Bromide Solution

We investigate the possibility of reusing CTAB solutions for repeated synthesis of gold nanorods. Three tasks have been solved. The first task is to clean the growth solutions from gold nanorods. The second task is to develop a method using a purified cetyltrimethylammonium bromide solution for repeated synthesis of gold nanorods with the same optical properties as in the initial synthesis. The third task is to test the possibility of management of the optical properties of nanorods during repeated synthesis. The polydispersity of nanorods has been estimated by form factor using developed mathematical model.

Download Full-text

Remyelination in experimentally demyelinated connexin 32 KnockOut mice

Arquivos de Neuro-Psiquiatria ◽

10.1590/s0004-282x2009000300020 ◽

2009 ◽

Vol 67 (2b) ◽

pp. 488-493

Author(s):

Adriano Tony Ramos ◽

Paulo César Maiorka ◽

Maria Lúcia Zaidan Dagli ◽

Fernando Yutaka Moniwa Hosomi ◽

Kalan Bastos Violin ◽

...

Keyword(s):

Knockout Mice ◽

Connexin 32 ◽

Ethidium Bromide Solution ◽

Normal Pattern ◽

Myelin Sheaths ◽

Transmission Electron ◽

Bromide Solution ◽

Sciatic Nerves ◽

Electron Microscopical

The aim of this study was to evaluate the role of connexin 32 (Cx 32) during remyelination of the peripheral nervous system, through a local injection of either 0,1% ethidium bromide solution or saline in the sciatic nerve of Cx 32 knockout mice. Euthanasia was performed ranging from 1, 2, 3, 7, 15, 21 to 30 days after injection. Histochemical, immunohistochemical, immunofluorescence and transmission electron microscopical techniques were used to analyze the development of the lesions. Within the sciatic nerves, Schwann cells initially showed signs of intoxication and rejected their sheaths; after seven days, some thin newly formed myelin sheaths with uneven compactness and redundant loops (tomacula) were conspicuous. We concluded that the regeneration of lost myelin sheaths within the PNS followed the pattern already reported for this model in other laboratory species. Therefore, these results suggest that absence of Cx 32 did not interfere with the normal pattern of remyelination in this model in young mice.

Download Full-text