Preconcentration of metal ions using microbacteria

Selective preconcentration of Lanthanum(III) byCoriolus versicolorimmobilised on Amberlite XAD-4 and its determination by ICP-OES

“…Dry biomass powder (250 mg) was mixed with 1.0 g of Amberlite XAD-4 (prepared by a procedure from our previous studies) and 15 mL of doubly distilled water and then thoroughly mixed [41]. Amberlite XAD-4 has been used as important adsorbent for the preconcentrations of organic and inorganic compounds [42] due to its high surface area, high affinity to complexation and/or coordination to related analytes, low particle size, chemical stability, reusability and easily functionability [43]. From these points of view, Amberlite XAD-4 was selected as sorbent for immobilisation of C. versicolor.…”

Preparation, characterization and application of Saussurea tridactyla Sch-Bip as green adsorbents for preconcentration of rare earth elements in environmental water samples

“…And a great deal of new SPE adsorbents have been explored for the preconcentration of REEs, including chelating resin [19], 2,6-diacetylpyridine functionalized Amberlite XAD-4 [20], graphene oxide-TiO 2 composite [21], acetylacetone-modified silica gel [22], oxidized multiwalled carbon nanotubes [23], polystyrene grafted with diethylene-triaminetetraacetic groups [24] etc. Besides, biomaterials have attained special interest due to their attractive features, such as easy-to-get, low cost, high efficiency, mild operation condition and ecologically-safe [25][26][27]. Because of abundant functional groups (amino, carboxyl and hydroxyl) on the surface, the biomass materials can provide active sites for REEs.…”

Ultra-trace determination of arsenic species in environmental waters, food and biological samples using a modified aluminum oxide nanoparticle sorbent and AAS detection after multivariate optimization

“…Solid phase extraction is one of the most effective preconcentration techniques that reduce solvent usage and exposure, disposal cost and extraction time for sample preparation [9]. Various materials such as Amberlite XAD-4 [10], octadecyl-bonded silica disk [11], activated carbon [12], microcrystalline naphthalene [13], dowex optipore V493 [14], sulfur powder [15], XAD-4 immobilized microbacteria [16], magnetic iron oxide nanoparticles [17] and ZrO 2 /B 2 O 3 nanoparticles [18] have been used in the solid-phase extraction process as sorbent. Today, metallic nanoparticles are new solid materials that have attracted to SPE methods due to their special properties such as large specific surface area and high activity (size-quantization effect), high adsorption capacity and low temperature modification, thus they are promising solid-phase extractants and have contaminant scavenging Electronic supplementary material The online version of this article (doi:10.1007/s00604-015-1532-6) contains supplementary material, which is available to authorized users.…”