Adsorption of heavy metal ions using hierarchical CaCO3–maltose meso/macroporous hybrid materials: Adsorption isotherms and kinetic studies

2012 ◽  
Vol 209-210 ◽  
pp. 467-477 ◽  
Author(s):  
Xiaoming Ma ◽  
Liping Li ◽  
Lin Yang ◽  
Caiyun Su ◽  
Kui Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Hybrid Materials ◽  
Adsorption Isotherms ◽  
Heavy Metal Ions ◽  
Kinetic Studies

scholarly journals Heavy Metal Ions Adsorption from Wastewater Using Activated Carbon from Orange Peel

2012 ◽  
Vol 9 (2) ◽  
pp. 926-937 ◽  
Author(s):  
Juan Carlos Moreno-Piraján ◽  
Liliana Giraldo
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Adsorption Isotherms ◽  
Heavy Metal Ions ◽  
Copper Ions ◽  
Orange Peel ◽  
Adsorption Model ◽  
Immersion Enthalpy ◽  
Adsorption Models

Activated carbon obtained from orange peel (ACOP) was synthesized and used for the removal of heavy metal ions (Cr, Cd, and Co) from aqueous solutions. Two different adsorption models were used for analyzing data. Adsorption capacities were determined: copper ions exhibit the greatest adsorption on activated carbon orange peel because of its size and pH conditions. Adsorption capacity varies as a function of pH. Adsorption isotherms from aqueous solution of heavy metals on ACOP were determined. Adsorption isotherms are consistent with Langmuir's adsorption model. Adsorbent quantity and immersion enthalpy were studied.

scholarly journals Equilibrium and kinetic studies on the removal of heavy metal ions with natural low-cost adsorbents

2014 ◽  
Vol 40 (3) ◽  
Author(s):  
Gamze Varank ◽  
Ahmet Demir ◽  
M. Sinan Bilgili ◽  
Selin Top ◽  
Elif Sekman ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Kinetic Studies

scholarly journals Preparation and Heavy Metal Ions Chelating Properties of Multifunctional Polymer-Grafted Silica Hybrid Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Luciana Sartore ◽  
Kamol Dey
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Hybrid Materials ◽  
Heavy Metal Ions ◽  
Solid Phase ◽  
Research Work ◽  
Inorganic Hybrid ◽  
Column Adsorption ◽  
Adsorption Desorption ◽  
Multifunctional Polymers

In this research work, novel hybrid materials based on multifunctional polymers and silica were developed and investigated in view of possible employment as sorbents for removal of heavy metal ions from water in presence of various ions. Organic-inorganic hybrid materials were prepared by covalent bonding of vinyl-terminated polyamidoamine (PAA) onto aminated silica particles. Two series of polyamidoamine-grafted silica, differing in the PAA chemical structure, were synthesized, and their heavy metal ions chelating properties were investigated. Column adsorption procedure for Cu, Zn, and Ni in aqueous solution was successfully established. Moreover, the adsorption behaviour of the materials was evaluated in different ionic strength solutions as well as in distilled and natural water. Organic-inorganic hybrid materials exhibited excellent chelating properties and selectivity for different metal ions. The hybrid columns showed exceptional eluting and regenerating property using diluted hydrochloric acid solution as eluent. In particular, the hybrid materials containing more carboxy groups possessed superior adsorption ability, reusability, and stability. The consecutive adsorption-desorption experiments exhibited that this material could be reused more than 20 cycles without almost any loss of adsorption capability. These new organic-inorganic sorbents appear very promising as an effective solid-phase extraction material for the selective preconcentration or removing of heavy metal ions from the environment.

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