Simultaneous separation of trace levels of germanium, antimony, arsenic, and selenium from an acid matrix by adsorbing colloid flotation

Abstract

A method for the simultaneous separation of trace levels of germanium, arsenic, antimony, and selenium as Ge(OH)gO~, As043~, Sb043", and Se032~respectively, from an acidic aqueous solution Is described. The anionic species are concentrated by adsorbing colloid flotation (ACF) using sodium lauryl sulfate and an Iron(III) hydroxide collector. Optimum recovery of the elements Is achieved at pH 5.5. The recovery of the elements Is as follows: Ge, 86.6 ± 2.3%; As, 85.3 ± 3.2%; Sb, 95.7 ± 2.3%; Se, 98.4 ± 2.1%. Flotation of the desired species Is achieved In less than 5 min using an air LITERATURE CITED

Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation

“…in natural waters, As III forms the two species H 3 AsO 3 0 and H 2 AsO 3 À at pH < 9.2 and pH < 12.7 respectively [4,5]. Many methods have been used for As III remediation from water and groundwater, including anion exchange [6,7], precipitation [8], flotation [9] as well as adsorption [10]. Many research groups have focused to adsorption technologies using a wide range of As III --adsorbing materials from aquatic solutions.…”

A CRITICAL REVIEW ON THE PROCESS OF CONTAMINANT REMOVAL IN FE0–H2O SYSTEMS

“…For co-precipitation (Equation (xiii), Table 2) to occur, a colloid must be preformed in the presence of the heavy metal ions (or generally the species) to be removed from solution. Metal ions are then adsorbed to colloids and entrapped in their structure while ageing [83][84][85].…”

Production and separation of no-carrier-added 73 As and 75 Se from 7 Li irradiated germanium oxide target

“…There are available reports on the separation of stable isotopes of As, Se and Ge present in trace level. Simultaneous separation of trace levels of Ge, Sb, As and Se from an acid matrix by adsorbing colloid flotation was reported by Decarlo et al [12]. Separation of "tracer packet" containing different nca radionuclides of 61 Cu, 56 Mn, 62,63 Zn, 66,67,68 Ga, 66,67,69 Ge, 71,72 As and 73 Se from cobalt target by liquid liquid extraction (LLX) using di-(2-ethylhehyl)phosphoric acid (HDEHP) and tributyl phosphate (TBP) was reported by Lahiri and Nayak [13].…”