Uranium adsorption by non-treated and chemically modified cactus fibres in aqueous solutions

2013 ◽  
Vol 298 (3) ◽  
pp. 1587-1595 ◽  
Author(s):  
Melpomeni Prodromou ◽  
Ioannis Pashalidis
Keyword(s):  
Aqueous Solutions ◽  
Uranium Adsorption ◽  
Chemically Modified ◽  
Cactus Fibres

Copper(II) removal from aqueous solutions by adsorption on non-treated and chemically modified cactus fibres

2013 ◽  
Vol 68 (11) ◽  
pp. 2497-2504 ◽  
Author(s):  
M. Prodromou ◽  
I. Pashalidis
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Chemical Treatment ◽  
Surface Complexes ◽  
Chemically Modified ◽  
Before And After ◽  
Bivalent Metal Ions ◽  
Time Evaluation ◽  
Cactus Fibres

The adsorption efficiency of a biomass by-product (cactus fibres) regarding the removal of copper(II) from aqueous solutions has been investigated before and after its chemical treatment. The chemical treatment of the biomass by-product included phosphorylation and MnO2-coating. The separation/removal efficiency has been studied as a function of pH, Cu(II) concentration, ionic strength, temperature and contact time. Evaluation of the experimental data shows that the MnO2-coated product presents the highest adsorption capacity, followed by the non-treated and phosphorylated material. Regarding the effect of ionic strength/salinity on the adsorption, in contrast to the removal efficiency of the phosphorylated product, which is significantly affected, the MnO2-coated and non-treated material don't show any effect, indicating the formation of inner-sphere surface complexes. The adsorption reaction is in all cases endothermic and relatively fast, particularly the adsorption on the MnO2-coated product. The results of the present study indicate that for the removal of bivalent metal-ions from contaminated waters the MnO2-coated material is expected to be the most effective adsorbent and an alternative to MnO2 resins for the treatment of environmentally relevant waters.

scholarly journals Orange-based and Lemon-based Adsorbents with Controlled Grain for an Efficient Elimination of Cationic and Anionic Dyes from Textile Dyeing Wastewater

2021 ◽  
Author(s):  
G. Pascual ◽  
M. Riba-Moliner ◽  
J. M. Canal ◽  
J. Garcia-Raurich
Keyword(s):  
Aqueous Solutions ◽  
Industrial Process ◽  
Operating Conditions ◽  
Dyeing Wastewater ◽  
Anionic Dyes ◽  
Chemically Modified ◽  
Natural Adsorbents ◽  
Textile Dyeing ◽  
Efficient Elimination ◽  
Textile Dyeing Wastewater

Abstract Physically and chemically modified orange and lemon mesocarps are used as natural adsorbents for both cationic and anionic dyes from wastewaters of textile dyeing industry. Adsorptivity of the orange-based and lemon-based adsorbents to the dyes are studied simulating a batch and a continuous industrial process. Thus, the most suitable operating conditions to achieve the maximum adsorption yield are provided. Results demonstrate that treated orange and lemon mesocarps can be used as excellent reusable adsorbents to the removal of cationic and anionic dyes from aqueous solutions. Moreover, the recovery of the adsorbed dye is also reliable and proved.

scholarly journals Effective removal of mercury(II) from aqueous solutions by chemically modified graphene oxide nanosheets

2020 ◽  
Vol 13 (1) ◽  
pp. 2659-2670 ◽  
Author(s):  
Fathi S. Awad ◽  
Khaled M. AbouZied ◽  
Weam M. Abou El-Maaty ◽  
Ahmad M. El-Wakil ◽  
M. Samy El-Shall
Keyword(s):  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Graphene Oxide Nanosheets ◽  
Chemically Modified ◽  
Effective Removal ◽  
Modified Graphene Oxide ◽  
Modified Graphene

Sorptive Response of Chromium (Cr+6) and Mercury (Hg+2) From Aqueous Solutions Using Chemically Modified Soils

2016 ◽  
Vol 45 (1) ◽  
pp. 20160066 ◽  
Author(s):  
A. A. B. Moghal ◽  
K. R. Reddy ◽  
S. Abu Sayeed Mohammed ◽  
M. Ali Al-Shamrani ◽  
W. M. Zahid
Keyword(s):  
Aqueous Solutions ◽  
Chemically Modified

Removal of Cu(II) from aqueous solutions using chemically modified chitosan

2010 ◽  
Vol 175 (1-3) ◽  
pp. 939-948 ◽  
Author(s):  
B. Kannamba ◽  
K. Laxma Reddy ◽  
B.V. AppaRao
Keyword(s):  
Aqueous Solutions ◽  
Modified Chitosan ◽  
Chemically Modified
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