Abstract:Chromium(VI) contamination of drinking water arises from industrial activity wherever there is a lack of environmental legislation enforcement regarding the removal of such pollutants. Whilst it is possible to remove such harmful metal ions from drinking water through large scale facilities, there currently exists no safe and simple way to filter chromium(VI) oxoanions at point-of-use (which is potentially safer and necessary in remote locations or humanitarian scenarios). High surface area cloth substrates ha… Show more
“…42 Using this strategy, Badyal et al developed a multistage procedure for creating a composite material from PP fabric via pulsed plasma coating with poly(vinylbenzyl chloride), followed by covalent grafting of calixarene (Table 4(4)). 312 The prepared membrane is able to selectively entrap Cr 6+ oxoanions, making it attractive for point-of-use application in geographic regions lacking appropriate wastewater treatment plants or flawed environmental monitoring systems. Independently, PP fabric has been coated with electroconductive polyaniline (PANI) for adsorbing humic acid (Table 4(1)).…”
Section: Overview Of the Functional Upcycling Strategy For Different ...mentioning
“…10f and Table 4(5)). The formation of active sites using high-energy sources such as g-ray radiation, 331,332 electron beam, 313 UV 333 and plasma 312 allows for the covalently attachment of different organic molecules (e.g., acrylonitrile, polymethyl acrylate, PS, GMA, AA, and benzyl chloride) to the PP surface (Fig. 10e and Table 4(4)).…”
Section: Polypropylene (Pp)mentioning
confidence: 99%
“…Fig. 10 Functionalisation of PP: (a) thermal xanthylation; 306 (b) radical grafting of polymers;[307][308][309] (c) heteroradicals functionalisation;167,310 (d) sulfonation;311 (e) grafting under physical treatment;312,313 (f) oxidation;42,314,315 (g) grafting of C-centered radicals; 316 and (h) diazirine modification through carbene intermediate 317. …”
Functional upcycling is post-polymerisation modification or surface functionalisation of plastic waste without considerable polymer chain destruction to produce a new upcycled material with added value.
“…42 Using this strategy, Badyal et al developed a multistage procedure for creating a composite material from PP fabric via pulsed plasma coating with poly(vinylbenzyl chloride), followed by covalent grafting of calixarene (Table 4(4)). 312 The prepared membrane is able to selectively entrap Cr 6+ oxoanions, making it attractive for point-of-use application in geographic regions lacking appropriate wastewater treatment plants or flawed environmental monitoring systems. Independently, PP fabric has been coated with electroconductive polyaniline (PANI) for adsorbing humic acid (Table 4(1)).…”
Section: Overview Of the Functional Upcycling Strategy For Different ...mentioning
“…10f and Table 4(5)). The formation of active sites using high-energy sources such as g-ray radiation, 331,332 electron beam, 313 UV 333 and plasma 312 allows for the covalently attachment of different organic molecules (e.g., acrylonitrile, polymethyl acrylate, PS, GMA, AA, and benzyl chloride) to the PP surface (Fig. 10e and Table 4(4)).…”
Section: Polypropylene (Pp)mentioning
confidence: 99%
“…Fig. 10 Functionalisation of PP: (a) thermal xanthylation; 306 (b) radical grafting of polymers;[307][308][309] (c) heteroradicals functionalisation;167,310 (d) sulfonation;311 (e) grafting under physical treatment;312,313 (f) oxidation;42,314,315 (g) grafting of C-centered radicals; 316 and (h) diazirine modification through carbene intermediate 317. …”
Functional upcycling is post-polymerisation modification or surface functionalisation of plastic waste without considerable polymer chain destruction to produce a new upcycled material with added value.
“…[23][24][25][26][27][28] Therefore, the design of sensors for the detection of ions and biological molecules has attracted extensive attention. 29 It has been reported that rhodamine, 30,31 BODIPY, 32 calixarene, 33,34 cyclodextrin 35 and their derivatives can effectively identify metal ions, but it has not been found that they can perform secondary recognition for amino acids. It is well known that triazole compounds are used as corrosion inhibitors of organic copper, among which 1,2,4-triazole compounds are the most prominent.…”
A fluorescence sensor of BINOL–xylose derivative was synthesized, which could only detect Fe3+ by 1 + 1 complex with high selectivity and sensitivity. The complex of the derivative with Fe3+ was found to perform secondary recognition of cysteine.
In current decade, curcumin and its analogues have been broadly used in biological eld. However, there are relatively fewer studies regarding their uorescence based applications for chromium ion sensing in water samples. This article, hereby, reports the synthesis, FTIR and 1 H-NMR spectroscopic analyses and optical description of 2,6-bis(E)-4-methylbenzylidine)-cyclohexan-1-one (sensor C), as a uorescence-on sensor for trace level sensing of chromium. The sensor C exhibited an ultra-selective response to chromium among the tested heavy metal ions. Different parameters were optimized like pH, effect of concentration of sensor C, metal ion and contact time. The binding stoichiometry of C :Cr 3+ was calculated to be 2:1 (Job's plot) with a signi cantly low detection limit of 2.3×10 − 9 M. Sensor C were practically employed for detection of chromium in spiked water samples.
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