Results 21 to 30 of about 19,353 (259)

Chitosan Beads as Eco-Friendly Biosorbent for the Biosorption of Au(III) and Cu(II) from Aqueous Solutions

Environment-Behaviour Proceedings Journal, 2022
This work aimed to study the biosorption of metal ions by chitosan beads, conducted at room temperature by adding chitosan beads into a conical flask containing different initial pH. The flask was agitated, and the concentrations of metal ions were determined using inductively coupled plasma-optical emission spectrometry (ICP-OES).
Annestasia Ollat Jampang, Eric D. Van Hullebusch, Hua Chang Siu   +2 more
openaire   +1 more source

Coating of 2-Aminobenzimidiazole and 1-(o-Tolyl)biguanide Functionalized Silicas on Iron Sand Magnetic Material for Sorption of [AuCl₄]^–

Indonesian Journal of Chemistry, 2019
Two novel materials of 2-aminobenzimidiazole (AB) and 1-(o-tolyl)biguanide (TB) modified silicas coated on the iron sand magnetic material (MM@SiO2/AB and MM@SiO2/TB) have been synthesized and were used to adsorb Au(III) from Au/Cu/Ni solution.
Nuryono Nuryono, Nur Mutia Rosiati, Abraham L Rettob, Suyanta Suyanta, Yateman Arryanto   +4 more
doaj   +1 more source

L-Arginine-Modified Silica for Adsorption of Gold(III)

Indonesian Journal of Chemistry, 2015
In this research, L-arginine-modified silica (SiO2-Arg) with 3-glycidoxypropyl-trimethoxysilane (GPTMS) as the linking agent has been synthesized through sol gel process for adsorption of Au(III) in aqueous solution.
Sri Hastuti, Nuryono Nuryono, Agus Kuncaka   +2 more
doaj   +1 more source

Temperature condition, sulfidation state, and gold formation mechanism of the Atash- Anbar polymetallic deposit (south Qazvin) based on mineralization, alteration and chemistry of ore minerals [PDF]

پترولوژی, 2022
The NW-trending Urumieh-Dokhtar Magmatic Belt (UDMA) in the central-western Iran is a part of the Eastern Tethyan orogenic belt (Deng et al., 2018) and over past decades, it has become one of the most significant polymetallic (Au-Cu-Fe-Pb-Zn) provinces ...
Ebrahim Tale Fazel, Narges Alaei Moghtader, Abbas Oroji   +2 more
doaj   +1 more source

Functionalization of Fe₃O₄/SiO₂ with N-(2-Aminoethyl)-3-aminopropyl for Sorption of [AuCl₄]^-

Indonesian Journal of Chemistry, 2016
Synthesis of Fe3O4/SiO2 modified with N-(2-aminoethyl)-3-aminopropyl group (Fe3O4/SiO2/ED) via coating method and its application for adsorption-desorption of anionic gold in aqueous solution have been conducted. The synthesized product was characterized
Nuryono Nuryono, Mighfar Syukur, Agus Kuncaka, Satya Candra Wibawa Sakti   +3 more
doaj   +1 more source

Synthesis and Characterization of Charge Transfer Salts Based on [M(dcdmp)2] (M = Au, Cu and Ni) with TTF Type Donors

Crystals, 2018
The charge transfer salts α-DT-TTF[Au(dcdmp)2] (1), BET-TTF[Au(dcdmp)2] (2M and 2T), α-DT-TTF[Cu(dcdmp)2] (3), ET[Cu(dcdmp)2] (4), (BET-TTF)2[Cu(dcdmp)2] (5), (ET)2[Ni(dcdmp)2] (6), and α-mtdt[Cu(dcdmp)2] (7) were obtained by electrocrystallization of ...
Rafaela A. L. Silva, Isabel C. Santos, Sandra Rabaça, Elsa B. Lopes, Vasco Gama, Manuel Almeida, Dulce Belo   +6 more
doaj   +1 more source

Geology and mineralization of the Duobaoshan supergiant porphyry Cu-Au-Mo-Ag deposit (2.36 Mt) in Heilongjiang Province, China: A review

China Geology, 2023
The reserves of the Duobaoshan porphyry Cu-Au-Mo-Ag deposit (also referred to as the Duobaoshan porphyry Cu deposit) ranks first among the copper deposits in China and 33rd among the porphyry copper deposits in the world.
Sen Zhang, Nan Ju, Guo-bin Zhang, Yuan-dong Zhao, Yun-sheng Ren, Bao-shan Liu, Hui Wang, Rong-rong Guo, Qun Yang, Zhen-ming Sun, Feng-ming Xu, Ke-yong Wang, Yu-jie Hao   +12 more
doaj   +1 more source

On the Superlattices of the Cu-Au System (II)

The Journal of the Japan Institute of Metals.B, 1951
In a previous paper (I), we reported on some physical propertis of the superlattices which correspond to Mg3Cd, MgCd and MgCd3. In this paper we shall present a general review of this Mg-Cd alloy system using the results of our investigations performedon about fourty specimes of various compositions.
openaire   +3 more sources

Characterization and Structural Insights of the Reaction Products by Direct Leaching of the Noble Metals Au, Pd and Cu with N,N′-Dimethyl-piperazine-2,3-dithione/I₂ Mixtures

Molecules, 2021
In the context of new efficient and safe leaching agents for noble metals, this paper describes the capability of the Me2pipdt/I2 mixture (where Me2pipdt = N,N′-dimethyl-piperazine-2,3-dithione) in organic solutions to quantitatively dissolve Au, Pd, and
Angela Serpe, Luca Pilia, Davide Balestri, Luciano Marchiò, Paola Deplano   +4 more
doaj   +1 more source

Studies and Considerations on Forty-Three Gold and Silver Nose Ornaments from the Moche Tomb of the Lady of Cao

Heritage, 2023
The authors studied forty-three beautiful nose ornaments from the Moche tomb of the Lady of Cao, located in the north of Peru, which has been dated to be around 300–400 d.C.
Giovanni E. Gigante, Roberto Cesareo, Angel Bustamante, Arabel Fernandez, Régulo Franco, Soraia Azeredo, Ricardo T. Lopes   +6 more
doaj   +1 more source