Transport Kinetics of Hg²⁺Through Bulk Liquid Membrane Using Calix[4]arene Ketone Derivative as Carrier

Transport of mercury through liquid membranes containing calixarene carriers

“…The results presented in Tables 2 and 3 indicate that the stirring speed affects the transport rate of Hg 2+ through the liquid membrane using calixarene as carrier. Comparison the rate constant shows, that k 2 sharply increases with increasing of stirring rate as compared with k 1 , except for calixarene ketone derivative [20] and the letter results are in the agreement with the literature [69]. The same time, R max decreases with an increase of the stirring speed.…”

“…Several investigations have discussed the effect of carrier (N,N′-bis[carbonylmethoxy (5,11,17,23-tetra-tert-butyl-25,26,27-tris-(ethoxy-carbonylmethoxy)calix(4)arenyl)]-1,2-diaminoethane) concentration between (1 × 10 − 5 -1 × 10 − 4 M) in CHCl 3 at 298 K and stirring speed. The obtained kinetic parameters were presented in Table 4, which shows that the initial carrier concentration substantially influences the kinetic constants as well as flux values [6,12,13,20]. This is confirmed also by R m values, which are in fairly good agreement with the theoretical dependences and experimental points, as shown in Fig.…”

“…[34]. Although a number of carriers for the transport of alkali and alkaline metal ions using BLMs have been used so far [34][35][36][37], relatively few carriers have been reported for the selective and efficient transport of heavy metal or mercury ions [13][14][15][16][17][18][19][20][38][39][40].…”

“…It was found that calyx(4)arene derivatives [6,12,13,[19][20][21] have the desired ability of selective extraction of Hg 2+ ions. These results initiated investigation of the transport of Hg 2+ by calixarene derivatives as a carrier through bulk liquid membrane and the influence of the temperature, stirring effect, carrier concentration and the type of solvent on the transport process.…”

“…The development of new methods for the selective removal of mercury is an important objective for environmental remediation. For this reason, a variety of calyx(4)arene derivatives were prepared for selective removal of Hg(II) ions from waste effluents [19][20][21]. Calix(n)arenes have been made in the design and synthesis of artificial receptors for cations, anions, and neutral organic molecules [22][23][24][25][26][27][28][29][30][31].…”