Simultaneous separation of mercury and lignosulfonate from aqueous solution using supported liquid membrane

Supported liquid membrane based removal of lead(II) and cadmium(II) from mixed feed: Conversion to solid waste by precipitation

“…Several conventional techniques are available for separation of heavy metals but they are ineffective when heavy metals are present in trace amounts i.e. less than 100 ppm [4][5][6][7][8][9][10][11]. Supported liquid membrane (SLM) based separation of metal ions from trace concentration is very promising technology which also allows selective solute separation.…”

“…At the optimum carrier concentration of 4.0% (v/v), extraction and recovery of Pb(II) were found to be 92.53% and 87.89%, respectively. Beyond the optimum carrier concentration, mobility of Pb(II)-carrier complex was reduced due to hindrance effect created by excess carrier and/or the complex leading to the reduction in both extraction and recovery[1,4].…”

Hollow Fiber Supported Liquid Membrane for Separation and Recovery of <sup>152+154</sup>Eu and <sup>90</sup>Sr from Aqueous Acidic Wastes

“…The extractant of cyanex301 (bis(2,4-4,trimethylphenyl)-dithiophosphonic acid. were obtained from Merck, Where cyanex301 as soft donor ligands so selective trivalent complex The aqueous solution was provided from tracer radioactive waste dissolved in 0.1 M HNO 3 . All other chemicals such as nitric acid and kerosene were obtained from sigma Aldrich.…”

“…The radionuclide contamination in the ET-RR1 reactor in Egypt zone can be considered to present both a short-term occupational exposure risk to operations workers and a long-term risk to the public and the environment. The types of possible risks depend on a variety of factors that are specific to each radionuclide, including the decay half-life of the nuclide, its mobility in the water and soil contamination (and ultimately in the groundwater), and its specific activity and/or biological toxicity [1]- [3]. Long-term human health risks arise primarily from a potential pathway where by an individual is exposed by ingesting contaminated groundwater and from a pathway involving direct exposure of an individual to contaminated sediment that is uncovered or otherwise brought to the surface in the distant future.…”

Mass Transfer in Hollow Fiber Supported Liquid Membrane for As and Hg Removal from Produced Water in Upstream Petroleum Operation in the Gulf of Thailand

“…Mercury was almost extracted within 5 min at pH ≥ 1 and was satisfactorily stripped out about 99% by using thiourea as the stripping solution. Chakrabarty (Chakrabarty et al, 2010) found that by using triocthyamine (TOA) as the extractant in liquid membrane, Hg(II) could be extracted from pure solution more than lignosulfonate-mixed solution.…”