In this work, a hybrid organic-inorganic adsorbent based on polyelectrolyte copolymers of poly(4-vinylbenzyl trimethylammonium chloride-co-2-hydroxyethyl methacrylate) microspheres mixed with a hydrous zirconium oxide phase were applied to remove arsenic species from aqueous solutions. The hybrid adsorbent was synthesized in a two-step procedure: first, the polymeric microspheres were obtained through emulsion radical copolymerization, and then, the microspheres were impregnated with a zirconium oxide precursor followed by the subsequent sol-gel reaction. The purpose of this hybrid material was to combine properties of each component in the interaction with arsenic oxoanions and compare its performance with commercial adsorbents. The polymer hybrid microspheres were shown to remove arsenate, and the presence of the inorganic phase also allowed for the removal of arsenite. The hybrid adsorbent exhibited arsenic sorption independent of pH, is able to regenerate, displays fast kinetics and has the ability to reduce arsenic concentration in treated water below 10 μg L-1 even in real samples with an initial concentration as high as 380 μg L-1.
This paper looks at chemistry of individual oxyhalogens such as chlorite, chlorate, perchlorate and bromates, their origin in drinking water and health effects which restrict their concentrations. It is concluded that with understanding of mechanisms of formation of individual oxyhalogens and undertaking practical steps during water treatment and disinfection processes their concentration can, in the majority of cases, be controlled within the drinking water guideline limits.
Three different sorbents based on hydrated ferric oxide (GEH, ArsenX(np) and Lewatit FO 36) were compared from the viewpoints of their column operation. Particle size distribution, pressure drop across the column and ferric oxide content were measured. Sorption capacities under the presence of accompanying ions were measured in batch wise and column experiments.
- MeSH
- adsorpce MeSH
- arsen analýza chemie MeSH
- chemické látky znečišťující vodu analýza chemie MeSH
- čištění vody metody MeSH
- velikost částic MeSH
- voda chemie MeSH
- železité sloučeniny chemie MeSH
- Publikační typ
- časopisecké články MeSH
- hodnotící studie MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- MeSH
- huminové látky analýza MeSH
- klinické laboratorní techniky využití MeSH
- monitorování životního prostředí MeSH
- Publikační typ
- kongresy MeSH
- MeSH
- chemické znečištění vody MeSH
- čištění vody MeSH
- dusičnany analýza MeSH
- elektrochemie metody MeSH
- iontoměniče MeSH
- zásobování vodou MeSH
- Publikační typ
- kongresy MeSH
