Modification of Gold Nanoparticle Loaded on Activated Carbon with Bis(4-methoxysalicylaldehyde)-1,2-Phenylenediamine as New Sorbent for Enrichment of Some Metal Ions

Abstract

In this study, a new sorbent based on the gold nanoparticle loaded in activated carbon (Au-NP-AC) was synthesized and modified by bis(4-methoxy salicylaldehyde)-1,2-phenylenediamine (BMSAPD). This sorbent, which is abbreviated as Au-NP-AC-BMSAPD, has been applied for the enrichment and preconcentration of trace amounts of Co(2+), Cu(2+), Ni(2+), Fe(2+), Pb(2+), and Zn(2+) ions in real samples. All metal ions under study were retained on the Au-NP-AC-BMSAPD sorbent by complexation of the ions with the BMSAPD ligand, providing an efficient preconcentration fashion. The retained metal ions were then eluted from the sorbent by HNO(3) and detected by flame atomic absorption spectrometry. The analytical parameters including pH, amount of ligand, and the nature of the eluent and solid phase were evaluated to obtain the optimum condition for the preconcentration factor. Following the optimum conditions, a preconcentration factor of 200 was obtained for all the metal ions under study with detection limits of 1.4-2.6 ng mL(-1). The method has been successfully applied for the extraction and determination of the ion content in the same real samples with recoveries in the range of 95-99.6% and a relative standard deviation lower than 4.0%.

Evaluation of the fate of arsenic-contaminated groundwater at different aquifers of Thar coalfield Pakistan

“…Moreover, it is necessary to develop sensitive and precise methods to quantify the iAs species. A number of separation and preconcentration methods were reported in the literature, solid phase extraction (Marahel et al 2011;Uluozlu et al 2010), gold nanoparticle loaded on activated carbon with bis(4-methoxysalicylaldehyde)-1,2-phenylenediamine as sorbent (Karimipour et al 2012), cloud point extraction, coprecipitation, ion exchange, and chromatography (Hirata and Toshimitsu 2007;Liang et al 2009). Among them, the cloud point extraction (CPE) technique was used for the extraction of As species-like arsenite (As 3+ ) and arsenate (As 5+ ), based on the phase separation of nonionic surfactants in aqueous media (Bezerra et al 2005;Sarı and Tuzen 2010).…”

Nanostructure silver-doped zinc oxide films coating on glass prepared by sol–gel and photochemical deposition process: Application for removal of mercaptan

“…5. It is noted that the absorption band edge is red-shifted and the absorption intensity is increased [43][44][45][46][47]. Fig.…”

Gold Nanoparticles Loaded on Activated Carbon as Novel Adsorbent for Kinetic and Isotherm Studies of Methyl Orange and Sunset Yellow Adsorption

“…[15] The slight blue shift of SPR from 540 to 525 nm with enhancement in pH is due to decrease in the size of Au nanoparticles. [21][22][23] On the other hand, the structure of starch and amount of produced Au nanoparticle significantly depend on pH value.…”

“…[13,14] Dyes generally are resistant to decomposition and biodegradation with chemicals, heat, and light due to their complex chemical structures. [15] Most of dye removal protocols in despite of their own advantages, possess limitations such as excess amount of chemical usage, accumulation of concentrated sludge, generate serious disposal problems and nonquantitative color reduction. The adsorption technique is based on the transfer of pollutants from the solution to the solid phase is superior to other conventional dye removal techniques in terms of initial cost, simplicity of design, ease of operation, and nontoxicity of the utilized adsorbents compared to other conventional wastewater treatment methods.…”