Table 1

Basal spacing and elemental analysis of Zn–Al-LDH (ZAN) and its nanohybrid with 2,4-D (ZANDI), the rate constants and correlation coefficients obtained from pseudo-second order fitting of the release of 2,4-D into single, binary and ternary aqueous systems
Sample Basal spacing (Å) Zn/Al ratio (N)/C (%) 2,4-D (% w/w)a
ZAN 8.9 3.8 (2.8)
ZANDI 20.1 4.0 14.7 33.9

Table 1

Basal spacing and elemental analysis of Zn–Al-LDH (ZAN) and its nanohybrid with 2,4-D (ZANDI), the rate constants and correlation coefficients obtained from pseudo-second order fitting of the release of 2,4-D into single, binary and ternary aqueous systems
Aqueous solution (0.05 M) Maximum release (%) Maximum release time (min) Zeroth order First order Parabolic diffusion Pseudo-second order
r2 r2 k(mg L s−1)b t½(min)c
Cl 25 4,273 0.779 0.811 0.914 0.996 0.000027 498
CO3 99 3,828 0.372 0.966 0.529 1.000 0.000033 107
PO4 93 701 0.427 0.511 0.616 0.997 0.000083 45
Cl-CO3 80 1,744 0.623 0.697 0.797 0.990 0.000024 167
Cl-PO4 88 840 0.378 0.445 0.567 0.999 0.000068 58
CO3-PO4 90 725 0.539 0.586 0.715 0.986 0.000035 104
Cl-CO3-PO4 88 270 0.564 0.586 0.774 0.982 0.00004 91

aEstimated from CHNS analysis based on pure 2,4-D

b,cEstimated using pseudo-second order kinetic model

aEstimated from CHNS analysis based on pure 2,4-D

b,cEstimated using pseudo-second order kinetic model

Hussein et al.

Hussein et al. Nanoscale Research Letters 2009 4:1351-1357   doi:10.1007/s11671-009-9404-9

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