Synthesis and application of a highly efficient polyvinylcalix[4]arene tetraacetic acid resin for adsorptive removal of lead from aqueous solutions

2011 ◽  
Vol 172 (1) ◽  
pp. 341-353 ◽  
Author(s):  
Birendra Babu Adhikari ◽  
Masaki Kanemitsu ◽  
Hidetaka Kawakita ◽  
Jumina ◽  
Keisuke Ohto
Keyword(s):  
Aqueous Solutions ◽  
Tetraacetic Acid ◽  
Adsorptive Removal ◽  
Highly Efficient ◽  
Acid Resin

Highly efficient adsorptive removal of sulfamethoxazole from aqueous solutions by porphyrinic MOF-525 and MOF-545

Chemosphere ◽  
2020 ◽  
Vol 250 ◽  
pp. 126133 ◽  
Author(s):  
Kwangsun Yu ◽  
Imteaz Ahmed ◽  
Dong-Il Won ◽  
Wan In Lee ◽  
Wha-Seung Ahn
Keyword(s):  
Aqueous Solutions ◽  
Adsorptive Removal ◽  
Highly Efficient

Facile Fabrication of Novel Magnetic ZIF-67 MOF@Aminated Chitosan Composite Beads for the Adsorptive Removal of Cr(VI) from Aqueous Solutions

2021 ◽  
pp. 118084
Author(s):  
Ahmed M. Omer ◽  
Eman M. Abd El-Monaem ◽  
Mona M. Abd El-Latif ◽  
Gehan M. El-Subruiti ◽  
Abdelazeem S. Eltaweil
Keyword(s):  
Aqueous Solutions ◽  
Adsorptive Removal ◽  
Composite Beads ◽  
Facile Fabrication ◽  
Chitosan Composite

scholarly journals Adsorptive Removal of Phosphate from Aqueous Solutions Using Low-Cost Volcanic Rocks: Kinetics and Equilibrium Approaches

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1312
Author(s):  
Dereje Tadesse Mekonnen ◽  
Esayas Alemayehu ◽  
Bernd Lennartz
Keyword(s):  
Aqueous Solutions ◽  
Low Income ◽  
Low Cost ◽  
Volcanic Rocks ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Adsorptive Capacity ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorptive Removal

The contamination of surface and groundwater with phosphate originating from industrial and household wastewater remains a serious environmental issue in low-income countries. Herein, phosphate removal from aqueous solutions was studied using low-cost volcanic rocks such as pumice (VPum) and scoria (VSco), obtained from the Ethiopian Great Rift Valley. Batch adsorption experiments were conducted using phosphate solutions with concentrations of 0.5 to 25 mg·L−1 to examine the adsorption kinetic as well as equilibrium conditions. The experimental adsorption data were tested by employing various equilibrium adsorption models, and the Freundlich and Dubinin-Radushkevich (D-R) isotherms best depicted the observations. The maximum phosphate adsorption capacities of VPum and VSco were calculated and found to be 294 mg·kg−1 and 169 mg·kg−1, respectively. A pseudo-second-order kinetic model best described the experimental data with a coefficient of correlation of R2 > 0.99 for both VPum and VSco; however, VPum showed a slightly better selectivity for phosphate removal than VSco. The presence of competitive anions markedly reduced the removal efficiency of phosphate from the aqueous solution. The adsorptive removal of phosphate was affected by competitive anions in the order: HCO3− >F− > SO4−2 > NO3− > Cl− for VPum and HCO3− > F− > Cl− > SO4−2 > NO3− for VSco. The results indicate that the readily available volcanic rocks have a good adsorptive capacity for phosphate and shall be considered in future studies as test materials for phosphate removal from water in technical-scale experiments.

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