for example, the cationic ODTMA-micelle-clay combined with ultrafiltration
(UF) (hollow fiber HF and spiral wound SW) membranes, activated carbon (AC),
and reverse osmosis (RO) has demonstrated high removal efficiency toward these
two NSAIDs and naproxen metabolite (DMN). Besides, the ODTMA-micelle-clay
complex has been found capable of completely removing the heavy metal Cr (VI)
from its aqueous solutions at ambient pH and temperature.
Table 2 Chemical structures and physicochemical properties of NSAIDs
NSAIDs
Chemical structure
CAS
number
Weight
Log
know pKa
Water
solubility
(mgL
À1
)
Naproxen
15,307–86-5 296.149
3.18
4.19 44
Diclofenac
15,307–86-5 296.149
4.51
4
10
Ibuprofen
15,687–27-1 206.2808 3.97
4.91 58
Ketoprofen
22,071–15-4 254.2806 3.12
4.45 51
Fenoprofen
29,679–58-1 242.2699 4.05
4.5
81
Information: (https://www.drugbank.ca/) assessed in the period between November and December
(2019), [35]
266
R. M. Gómez-Espinosa and D. Arizmendi-Cotero
(UF) (hollow fiber HF and spiral wound SW) membranes, activated carbon (AC),
and reverse osmosis (RO) has demonstrated high removal efficiency toward these
two NSAIDs and naproxen metabolite (DMN). Besides, the ODTMA-micelle-clay
complex has been found capable of completely removing the heavy metal Cr (VI)
from its aqueous solutions at ambient pH and temperature.
Table 2 Chemical structures and physicochemical properties of NSAIDs
NSAIDs
Chemical structure
CAS
number
Weight
Log
know pKa
Water
solubility
(mgL
À1
)
Naproxen
15,307–86-5 296.149
3.18
4.19 44
Diclofenac
15,307–86-5 296.149
4.51
4
10
Ibuprofen
15,687–27-1 206.2808 3.97
4.91 58
Ketoprofen
22,071–15-4 254.2806 3.12
4.45 51
Fenoprofen
29,679–58-1 242.2699 4.05
4.5
81
Information: (https://www.drugbank.ca/) assessed in the period between November and December
(2019), [35]
266
R. M. Gómez-Espinosa and D. Arizmendi-Cotero