Other — Synthesis, identification and application of metal organic framework for removal of industrial cationic dyes

7 measurement groups · 20 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Vacuum-dried ZIF-7 · Powder

20 mg ZIF-7 with 25 mL BG solution, C0 2.65e-4 to 5.27e-3 mol L-1, pH 8, 90 min; UV-vis at 626 nm.

Temperature: 298
Atmosphere: aqueous
Context: pristine ZIF-7 adsorbent
Measurement source: 2 · 2.4. Adsorption studies of MB and BG dyes · Table 3; Figs. 10, 12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BG Langmuir calculated qm	qm = 0.1851 mmol g-1	0.1851 mmol/g	—	Table Exact Reported	7 · 3.2.6. Adsorption isotherms · Table 3
BG Langmuir experimental maximum capacityMarked as a best value within this paper	qm exp = 0.181 mmol g-1	0.181 mmol/g	—	Table Exact Reported	7 · 3.2.6. Adsorption isotherms · Table 3
BG Langmuir R2Marked as a best value within this paper	R2 = 0.99975	0.99975	—	Table Exact Reported	7 · 3.2.6. Adsorption isotherms · Table 3

Vacuum-dried ZIF-7 · Powder

20 mg ZIF-7 with 25 mL MB solution, C0 2.76e-4 to 2.94e-3 mol L-1, pH 9, 90 min; UV-vis at 662 nm.

Temperature: 298
Atmosphere: aqueous
Context: pristine ZIF-7 adsorbent
Measurement source: 2 · 2.4. Adsorption studies of MB and BG dyes · Table 2; Figs. 9, 11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
MB Langmuir calculated qm	qm = 2.47 mmol g-1	2.47 mmol/g	—	Table Exact Reported	6 · 3.2.6. Adsorption isotherms · Table 2
MB Langmuir experimental maximum capacityMarked as a best value within this paper	qm exp = 2.42 mmol g-1	2.42 mmol/g	—	Table Exact Reported	6 · 3.2.6. Adsorption isotherms · Table 2
MB Langmuir R2Marked as a best value within this paper	R2 = 0.99952	0.99952	—	Table Exact Reported	6 · 3.2.6. Adsorption isotherms · Table 2

Vacuum-dried ZIF-7 · Powder

120 mg ZIF-7 with 150 mL BG solution, C0 3.6e-3 mol L-1, pH 8, 25 C, 200 rpm; UV-vis after sampled intervals.

Temperature: 298
Atmosphere: aqueous
Context: pristine ZIF-7 adsorbent
Measurement source: 3 · 2.4. Adsorption studies of MB and BG dyes · Table 5; Figs. 14, 16

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BG pseudo-second-order kinetic R2Marked as a best value within this paper	R2 = 0.989	0.989	—	Table Exact Reported	10 · 3.2.7. Kinetics of adsorption and mechanism studies · Table 5
BG experimental kinetic qeMarked as a best value within this paper	qe (exp) = 0.1442 mmol g-1	0.1442 mmol/g	—	Table Exact Reported	10 · 3.2.7. Kinetics of adsorption and mechanism studies · Table 5

Vacuum-dried ZIF-7 · Powder

120 mg ZIF-7 with 150 mL MB solution, C0 1.9e-4 mol L-1, pH 9, 25 C, 200 rpm; UV-vis after sampled intervals.

Temperature: 298
Atmosphere: aqueous
Context: pristine ZIF-7 adsorbent
Measurement source: 3 · 2.4. Adsorption studies of MB and BG dyes · Table 4; Figs. 13, 15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Adsorption equilibrium time	highest adsorption at 100 min	100 min	—	Text Rounded Reported	7 · 3.2.7. Kinetics of adsorption and mechanism studies · Figs. 13-16
MB pseudo-second-order kinetic R2Marked as a best value within this paper	R2 = 0.9995	0.9995	—	Table Exact Reported	10 · 3.2.7. Kinetics of adsorption and mechanism studies · Table 4
MB experimental kinetic qeMarked as a best value within this paper	qe (exp) = 2.32 mmol g-1	2.32 mmol/g	—	Table Exact Reported	10 · 3.2.7. Kinetics of adsorption and mechanism studies · Table 4

Vacuum-dried ZIF-7 · Powder

Adsorption at 293, 298, 303, 308, 313 and 318 K for MB/BG; van't Hoff analysis from ln Kc vs 1/T.

Temperature: 293-318
Atmosphere: aqueous
Context: pristine ZIF-7 adsorbent
Measurement source: 11-12 · 3.2.8. Parameters of thermodynamics · Table 6; Figs. 17, 18

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BG standard enthalpy change	Delta H = 52.126 kJ mol-1	52.126 kJ/mol	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6
BG standard entropy change	Delta S = 151.96 J mol-1 K-1	151.96 J/mol/K	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6
BG zero standard free-energy temperature	T0 = 285 K	285 K	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6
MB standard enthalpy change	Delta H = 89.644 kJ mol-1	89.644 kJ/mol	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6
MB standard entropy change	Delta S = 33.729 J mol-1 K-1	33.729 J/mol/K	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6
MB zero standard free-energy temperature	T0 = 265.7 K	265.7 K	—	Table Exact Reported	12 · 3.2.8. Parameters of thermodynamics · Table 6

White ZIF-7 crystals · Powder

Solid addition method; initial/final pH relationship used to determine pHPZC.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Point of zero chargeMarked as a best value within this paper	pHPZC = 7.5	7.5 pH	—	Text Exact Reported	4 · 3.2.1. Point of zero charge determination · Fig. 5

Vacuum-dried ZIF-7 · Powder

Three consecutive adsorption-desorption cycles; regenerated with 0.01 M HCl to pH 7, water, ethanol, and 60 C oven drying for 4 h.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
BG regeneration efficiencies over three cycles	98.8%, 96.3%, 94.6%	—	—	Text Exact Reported	12 · 3.2.11. Reusability test of adsorbent
MB regeneration efficiencies over three cycles	97.8%, 95.5%, 93.6%	—	—	Text Exact Reported	12 · 3.2.11. Reusability test of adsorbent