Removal of highly toxic Cd(II) metal ions from aqueous medium using magnetic nanocomposite: adsorption kinetics, isotherm and thermodynamics

被引：14
|
作者：
Alqadami, Ayoub Abdullah [1 ]
Naushad, Mu [1 ]
Ahamad, Tansir [1 ]
Algamdi, Mohammad [2 ]
Alshahrani, Ahmed [2 ]
Uslu, Hasan [3 ]
Shukla, Sudheesh K. [4 ]
机构：
[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
[2] King Abdulaziz City Sci & Technol, Riyadh, Saudi Arabia
[3] Beykent Univ, Engn Fac, Chem Engn Dept, Istanbul, Turkey
[4] Shandong Univ, Sch Environm Sci & Engn, Qingdao 266237, Peoples R China
来源：
DESALINATION AND WATER TREATMENT | 2020年 / 181卷
关键词：
Magnetic; Nanocomposite; Isotherm; Kinetics; Toxic Cd(II); COMPOSITE-MATERIAL; EFFICIENT REMOVAL; HEAVY-METALS; PB(II); PERFORMANCE; FABRICATION; BIOCHAR; DYE; EQUILIBRIUM; BIOSORPTION;
D O I：
10.5004/dwt.2020.25108
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this research, trisodium citrate (TSC) based magnetite (Fe3O4) nanocomposite was developed (Fe3O4@TSC) and applied as an efficient adsorbent for removal of Cd(II) from aqueous medium. The influence of experimental factors such as pH of the solution, amount of Fe3O4@TSC, temperature, contact time and initial Cd(II) concentration were studied. The results exhibited that the optimum pH value, equilibrium time and temperature were 7.6, 60 min and 298 K, respectively. The adsorption isotherm and kinetics were followed to the Langmuir isotherm and pseudo-second-order model, respectively. The maximum monolayer adsorption capacity was 312.5 mg/g at 298 K. The adsorption of Cd(II) on Fe3O4@TSC was exothermic in nature and spontaneous process based on negative values of Delta H degrees and Delta G degrees. The type of interactions between electropositive Cd(II) and the carboxylic group was electrostatic interactions.
引用
收藏
页码：355 / 361
页数：7
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