The use of mesoporous silica in the removal of Cu(I) from the cyanidation process

Salazar-Hernández, Mercedes; Salazar-Hernández, Carmen; Elorza-Rodríguez, Enrique; Ríos, Higinio Juárez

doi:10.1007/s10853-014-8603-7

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Meso-porous materials have a pore network that can be disarranged or arranged; the latter is called an ordered mesoporous material whose main characteristic is to have a surface area between the ranges of 300 and 1200 m 2 [9]. According to the absorption capacity and chemical properties of MS, these materials could be used as new adsorption systems at different industrial applications, such as adsorption of pollutants [10,11], catalyst supports [12], and sustained drug release systems [13][14][15][16].…”

Section: Mesoporous Silica As Drug Deliverymentioning

confidence: 99%

Silica from Rice as New Drug Delivery Systems

Salazar-Hernández¹,

Salazar-Hernández²,

Rocío³

et al. 2017

Rice - Technology and Production

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The pharmaceutical industry has seen an increased need of carriers or excipients design that allows the controlled release of a drug in the human body. The main role of an excipient is to carry the drug for its administration under therapeutic index. Among the new generation of excipients, the ordered mesoporous silica (MS) presents several advantages, such as excellent biocompatibility, good adsorption capacity, and precise control in the drug delivery. However, the high cost of synthesis of mesoporous silica restricts its use to industrial applications; therefore, a low-cost procedure is necessary for widespread use. Biogenic silica from rice husk (SiO 2 -rice) could be a new choice as a drug delivery system. This silica is obtained from an acid leaching of rice husk followed by calcinations processes at low temperatures; these conditions produce silica with good adsorption properties, similar to those of MS. In consequence, the excipient behavior of SiO 2 -rice was assessed using folic acid as the model drug, displaying an 18.5% of absorption in the SiO 2 -rice pores, while MS absorbed around 19%. The drug release profiles were similar for both the silicas, suggesting that SiO 2 -rice could be a low-cost, similar yield excipient for drugs similar to folic acid.

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Section: Mesoporous Silica As Drug Deliverymentioning

confidence: 99%

Silica from Rice as New Drug Delivery Systems

Salazar-Hernández¹,

Salazar-Hernández²,

Rocío³

et al. 2017

Rice - Technology and Production

Self Cite

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“…Recently, advances in current nano-technology, science, and standardized hybrid permeable substances have gained considerable attention for sorption and separation purposes, owing to their orderly, uniform, and interpenetrating mesoporous, tunable hole sizes and extended surface areas. Numerous organic-inorganic porous hybrids evolved for excluding heavy metals (Ba(II), Hg(II), Cd(II), Cu(II), and Pb(II)) from wastewater [28][29][30]. Graphene-based mesoporous silica was utilized for Pb(II) ions' elimination [31].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

et al. 2022

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The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO2 is produced from rice husks through the wet process. Subsequently, SiO2 reacted with graphene oxide to form silica/graphene oxide (SiO2/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO2/GO. Factors affecting U(VI) sorption on SiO2/GO, including pH, sorption time, a dosage of SiO2/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO2/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO2/GO has essentially regenerated with a 0.8 M H2SO4 and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO2/GO.

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Cu(I) removal using mesoporous silica (UGM-triamin)

Salazar-Hernández

Elorza-Rodríguez

Mendoza-Miranda

et al. 2021

JCPE

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This paper shows the syntheses and use of hybrid porous silica materials (UGM-triamin) in the adsorption of Cu (I) of the cyanidation effluents of gold and silver. Studies of adsorption of Cu (I) in synthetic solutions of Cu-CN a pH of 11 and at a concentration ratio of 1: 5 Cu: CN, simulating the effluents of cyanide process gold and silver ores, showed maximum adsorption capacity of 7.54 mg of Cu (I) per gram of material and favorable adsorption according to the Langmuir model (RL of 0.31 to 0.41). The evaluation of the adsorption capacity of the material with real solutions of cyanide, showed 95% removal of copper in the effluent cyanide and 68.5% selectivity for the adsorption of copper. It has been observed free cyanide destruction in the system during adsorption of copper, so that the oxidation of free cyanide may be linked to the mechanism of adsorption of copper.

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The use of mesoporous silica in the removal of Cu(I) from the cyanidation process

Cited by 4 publications

References 41 publications

Silica from Rice as New Drug Delivery Systems

Silica from Rice as New Drug Delivery Systems

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

Cu(I) removal using mesoporous silica (UGM-triamin)

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