Journal ArticleDOI
Elimination of Cr(VI) from Electroplating Wastewater by Electrodialysis Following Chemical Precipitation
TLDR
In this article, the elimination of Cr(VI) from an electroplating wastewater in China was studied by chemical precipitation (CP), electrodialysis (ED), and their combination.Abstract:
In this work, the elimination of Cr(VI) from an electroplating wastewater in China was studied by chemical precipitation (CP), electrodialysis (ED), and their combination The experimental results show that CP was effective as a rougher treatment for removing Cr(VI) from a high Cr(VI) wastewater, but not for a deep Cr(VI) elimination ED alone failed to achieve a deep Cr(VI) elimination from a high Cr(VI) wastewater, although it was very effective for a medium Cr(VI) wastewater The mechanism might be attributed to the sedimentation of chromatic ions as polychromates in the pores of ED membranes because of high Cr(VI) concentration in wastewater, which may block the pores and thus stop the transportation of the ions through the pores It was found that the combined chemical precipitation and electrodialysis (CP + ED) process is an effective and economic process to treat high Cr(VI) electroplating wastewater This process allows treated water to be completely recycled to electroplating lines, feweread more
Citations
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Metal-organic frameworks: Challenges and opportunities for ion-exchange/sorption applications
TL;DR: In this article, a review focused on metal-organic materials as sorbents for ions by surveying MOFs with respect to their exchange/sorption capacities in association with their synthesis and structural characteristics.
Journal ArticleDOI
Removal of Pb(II) from water using synthesized kaolin supported nanoscale zero-valent iron
TL;DR: In this article, a nanoscale zero-valent iron (nZVI) was used to remove Pb(II) ion from aqueous solution, where 90.1% of PbII was removed within 60min using 5 ǫgǫL−1 of nZVI.
Journal ArticleDOI
Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives
TL;DR: A comprehensive review of studies on electrodialysis applications in wastewater treatment, outlining the current status and the future prospect is presented, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive.
Journal ArticleDOI
Selective capture of hexavalent chromium from an anion-exchange column of metal organic resin–alginic acid composite
Sofia Rapti,Anastasia Pournara,Debajit Sarma,Ioannis T. Papadas,Gerasimos S. Armatas,Athanassios C. Tsipis,Theodore Lazarides,Mercouri G. Kanatzidis,Manolis J. Manos +8 more
TL;DR: An ion-exchange column of metal organic resin (MOR-1)–alginic acid (HA) composite shows remarkable efficiency and selectivity for sorption of Cr(vi) using a high-performance liquid chromatography apparatus.
Journal ArticleDOI
All in one porous material: Exceptional sorption and selective sensing of hexavalent chromium by using a Zr4+ MOF
Sofia Rapti,Debajit Sarma,Debajit Sarma,Stavros A. Diamantis,Euaggelia Skliri,Gerasimos S. Armatas,Athanassios C. Tsipis,Youssef S. Hassan,Mohamed H. Alkordi,Christos D. Malliakas,Mercouri G. Kanatzidis,Theodore Lazarides,John C. Plakatouras,Manolis J. Manos +13 more
TL;DR: In this article, a new microporous metal-organic framework (MOF) with an 8-connected net and a bulky functional group was introduced into the terephthalate scaffold prior to the MOF synthesis, referred as MOR-2 (metal organic resin-2).
References
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Journal ArticleDOI
Reduction of hexavalent chromium by ferrous iron
David L. Sedlak,Pamela G. Chan +1 more
TL;DR: In this article, the reaction of hexavalent chromium [Cr(VI)] with Fe(II) has been studied as a function of pH and temperature, and the results suggest that the reduction of Cr(VI) occurs on the timescale of minutes to months in Fe (II)-containing sediments, soils, and waters.
Journal ArticleDOI
Removal and recovery of zinc from solution and electroplating effluent using Azolla filiculoides
TL;DR: In this paper, the removal of zinc ions from aqueous solutions and electroplating rinse effluent by Azolla filiculoides on batch and column studies was investigated.
Journal ArticleDOI
An early history of electrodialysis with permselective membranes
V.A. Shaposhnik,K. Kesore +1 more
TL;DR: The main stages in the history of electrodialysis, from the discovery of the method in 1890 to the development of the fundamental principles of matter-separation and chemical conversions, are outlined in this paper.
Journal ArticleDOI
A case study of microwave processing of metal hydroxide sediment sludge from printed circuit board manufacturing wash water
TL;DR: In this article, an experimental investigation, exploratory in nature, which employs microwave radiation for detoxification of the sediment sludge through microwave heating, drying and metal ion immobilization within the sediment solids was studied in conjunction with an evaluation of microwave energy efficiency in comparison to the more conventional convective heating and drying processes.
Journal ArticleDOI
Current-voltage curves for an electrodialysis reversal pilot plant: determination of limiting currents
TL;DR: In this paper, the limiting current densities for an electrodialysis (ED) reversal pilot plant were obtained by a tangent method, and the results were consistent with dimensional analysis characterizing the ED system and allow us to determine the hydrodynamic regime in the studied range of solution flow velocities from the hydraulic resistance factor as a function of the Reynolds number.