A novel bisphosphonate-based solid phase method for effective removal of chromium(iii) from aqueous solutions and tannery effluents

Abstract

A novel bisphosphonate-based solid phase method for effective removal of chromium(III) from aqueous solutions and tannery effluents3

Insight into the adsorption mechanisms of methylene blue and chromium(iii) from aqueous solution onto pomelo fruit peel

“…Among the chemicals exhausted from these factories, methylene blue (MB) is responsible for fast heart rate, vomiting (spitting), shock, Heinz body formation, cyanosis, jaundice (icterus), quadriplegia and tissue necrosis in humans, [2][3][4][5] whereas chromium compounds cause nausea, diarrhoea, liver failure, dermatitis (eczema), internal haemorrhage (bleeding) and respiratory troubles. [6][7][8][9] Various chemical and physical methods have been employed to remove the MB and chromium compounds from aqueous solution, such as solvent extraction, 8 adsorption, [10][11][12][13] coagulation, [14][15][16] membrane separation, 17,18 ion exchange, 19,20 electrodeposition, 21 and reverse osmosis. 22 It is wellknown that, adsorption is a promising method to remove these compounds from waste water since this method has high enrichment efficiency and can be easily used to separate the phases.…”

Advanced material and approach for metal ions removal from aqueous solutions

“…During their 60 years lifetime, BPs have been used for several purposes based on their effective metal chelation properties initially as water softeners 29 but more recently as bone drugs 30 31 32 . We have developed a novel, straightforward and rapid method for chromium III ion collection from aqueous solutions and tannery effluents using solid bisphosphonates (BPs) which needs no precipitation step 33 . There do not appear to be any reports in the literature of BPs being utilized in metal ion collection without the presence of some additional resin.…”

Smart, programmable and responsive injectable hydrogels for controlled release of cargo osteoporosis drugs

“…The release results presented in Figs 4 and 5 clearly demonstrate some important trends. Both for amino-BPs and non-polar side-chain BPs, their rates and final % release correlate with their aqueous solubility trends (see Figs S-22 and S-23 ) 33 , 34 . Interestingly, none of the BP-loaded hydrogels reaches quantitative release ( eg .…”

“…Amino-BPs are much less soluble in water than alkyl-BPs 33, 34 , most likely due to the extensive intermolecular H-bonding interactions of the protonated amine moiety. However, our results reveal that they are unexpectedly delivered more readily to the aqueous phase than their alkyl-BP analogs.…”

“…The release profiles of the alkyl-BPs and amino-BPs (with the latter demonstrating faster and higher release) are inversely proportional to the aqueous solubility of these two families of BPs. Amino-BPs are much less soluble in water than alkyl-BPs 33 , 34 , most likely due to the extensive intermolecular H-bonding interactions of the protonated amine moiety. However, our results reveal that they are unexpectedly delivered more readily to the aqueous phase than their alkyl-BP analogs.…”