scholarly journals Graphene/CNT hybrid effect on Absorption of Mn2+ by Activated Carbon

2019 ◽  
Vol 2 (2) ◽  
pp. 31-36 ◽  
Author(s):  
Ahmad Ghozatloo ◽  
Mojtaba Shariaty-Niassar
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Heavy Metal Ions ◽  
Ion Adsorption ◽  
Manganese Ions ◽  
Experimental Conditions ◽  
Hybrid Effect ◽  
Initial Concentration ◽  
Adsorption Amount

In this paper we tried to improve the adsorption amount by adding graphene/CNT hybrid in the structure of Activated Carbon (AC) for removing manganese ions from aqueous solutions. The bonding of G/CNT hybrid with activated carbon creates a structure that is an excellent absorbent for removing some heavy metal ions. So the Performance increasing of ion adsorption was compared with AC results as the blank adsorbent. The influence of time, pH solution, initial concentration of Mn2+ and temperature investigated as experimental conditions. The maximum adsorption was 89.38% and 96.18% for  AC and AC/G/CNT composite respectively at 30 min, initial concentration of 30 mg/L, pH=4.5 in 15°C for both adsorbents. The results showed that under the same conditions, the presence of G/CNT hybrid in the structure of AC increased the amount of adsorption by 7.5%  

scholarly journals Modification of Salix americana willow bark for removal of heavy metal ions from aqueous solutions

2014 ◽  
Vol 16 (4) ◽  
pp. 41-44
Author(s):  
Iwona Rypińska ◽  
Marta Biegańska
Keyword(s):  
Heavy Metal ◽  
Nitric Acid ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Practical Application ◽  
Initial Concentration ◽  
Willow Bark ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

Abstract Salix americana willow bark is a waste arising in the process of wicker decortication that so far has not found any practical application. The bark can adsorb metal ions, because in its composition among others are phenolic groups which may be involved in the removal of metal ions from water solutions. The results of sorption of copper(II) and zinc(II) on modified willow bark of Salix americana were presented. The bark was modified with nitric and sulfuric acids at concentrations ranging from 5 to 15%. The best adsorption results were obtained using 15% nitric acid for modification. Adsorption of metal ions from aqueous solutions at concentrations raging from 20 to 100 mg/dm3 was studied. It was found that an increase in the initial concentration of copper(II) and zinc(II) resulted in an increase in their adsorption on the modified cortex.

Removal of Heavy Metal Ions from Aqueous Solution by Raw and Modified Diatomite

2014 ◽  
Vol 522-524 ◽  
pp. 656-659 ◽  
Author(s):  
Wen Sheng Linghu ◽  
Jia Ming Cui
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Batch Reactor ◽  
Adsorption Efficiency ◽  
Initial Concentration ◽  
Acid Wash ◽  
Adsorption Amount ◽  
Modified Diatomite

Removal of heavy metal ions (Cu2+, Pb2+and Ni2+) from aqueous solution by raw and modified diatomite was investigated in a batch reactor. The diatomite was modified by acid-wash and base-wash, respectively. The influence of kind of diatomite, contact time and initial concentration of metal ions on the adsorption efficiency were studied. The results showed that the acid-washed diatomite showed the best adsorption capacity for all of Cu2+, Pb2+and Ni2+) among raw, acid-washed and base-washed diatomites. Metal ions adsorption amount on A-diatomite increased in the initial concentration range from 10 to 50ppm and in general kept constant after the initial concentration was higher than 60ppm. The result also indicated that Ni2+is more easily adsorbed on the surface of diatomite than Pb2+and Cu2+.

Comparative Bio-sorption of Cadmium and Nickel Ions from Aqueous Solution onto Fibers of Date Palm using Fluidized Bed Column

2019 ◽  
Vol 70 (5) ◽  
pp. 1507-1512
Author(s):  
Baker M. Abod ◽  
Ramy Mohamed Jebir Al-Alawy ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Date Palm ◽  
Operating Conditions ◽  
Initial Concentration ◽  
Bed Height

The aim of this study is to use the dry fibers of date palm as low-cost biosorbent for the removal of Cd(II), and Ni(II) ions from aqueous solution by fluidized bed column. The effects of many operating conditions such as superficial velocity, static bed height, and initial concentration on the removal efficiency of metal ions were investigated. FTIR analyses clarified that hydroxyl, amine and carboxyl groups could be very effective for bio-sorption of these heavy metal ions. SEM images showed that dry fibers of date palm have a high porosity and that metal ions can be trapped and sorbed into pores. The results show that a bed height of 6 cm, velocity of 1.1Umf and initial concentration for each heavy metal ions of 50 mg/L are most feasible and give high removal efficiency. The fluidized bed reactor was modeled using ideal plug flow and this model was solved numerically by utilizing the MATLAB software for fitting the measured breakthrough results. The breakthrough curves for metal ions gave the order of bio-sorption capacity as follow: Cd(II)]Ni(II).

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