scholarly journals The use of low cost and environment friendly materials for the removal of heavy metals from aqueous solutions

2008 ◽  
Vol 3 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Nour El- Din T. Abdel-Ghani ◽  
Ghadir. A. El-Chaghaby
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Environment Friendly ◽  
Removal Of Heavy Metals

scholarly journals Study on Adsorption of Cu and Ba from Aqueous Solutions Using Nanoparticles of Origanum (OR) and Lavandula (LV)

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Ghadah M. Al-Senani ◽  
Foziah F. Al-Fawzan
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Free Energy ◽  
Aqueous Solutions ◽  
Thermodynamic Parameters ◽  
Solution Ph ◽  
Environment Friendly ◽  
Removal Of Heavy Metals ◽  
Equilibrium Data ◽  
Langmuir And Freundlich Models

Wild herbs (Origanum (OR) and Lavandula (LV)) were used as environment-friendly adsorbents in this study. The adsorbents were used for adsorption of Cu and Ba from water. The adsorption of heavy metals onto OR and LV was dependent on particle size, dose, and solution pH. The diameter of adsorbent particles was less than 282.8 nm. The adsorption follows second-order kinetics. Langmuir and Freundlich models have been applied to describe the equilibrium data, and the thermodynamic parameters, the Gibbs free energy, ∆G°, enthalpy, ∆H°, and entropy, ∆S°, have been determined. The positive value of ∆H° suggests that the adsorption of heavy metals by the wild herbs is endothermic. The negative values of ∆G° at all the studied temperatures indicate that the adsorption is a spontaneous process. It can be concluded that OR and LV are promising adsorbents for the removal of heavy metals from aqueous solutions over a range of concentrations.

A novel environment-friendly hybrid material based on a modified silica gel with a bispyrazole derivative for the removal of ZnII, PbII, CdIIand CuIItraces from aqueous solutions

2017 ◽  
Vol 4 (11) ◽  
pp. 1821-1831 ◽  
Author(s):  
Smaail Radi ◽  
Mohamed El Massaoudi ◽  
Maryse Bacquet ◽  
Stéphanie Degoutin ◽  
N. N. Adarsh ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Silica Gel ◽  
Hybrid Material ◽  
Efficient Removal ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Environment Friendly ◽  
Novel Environment ◽  
Removal Of Heavy Metals

New surface-functionalized with bispyrazole receptor was designed for efficient removal of heavy metals. The architecture of host–guest on the surface was identified.

scholarly journals Heavy Metal Adsorption ontoKappaphycussp. from Aqueous Solutions: The Use of Error Functions for Validation of Isotherm and Kinetics Models

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Md. Sayedur Rahman ◽  
Kathiresan V. Sathasivam
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Kinetic Models ◽  
Adsorption Process ◽  
Low Cost ◽  
Metal Adsorption ◽  
Red Seaweed ◽  
Error Functions ◽  
Removal Of Heavy Metals

Biosorption process is a promising technology for the removal of heavy metals from industrial wastes and effluents using low-cost and effective biosorbents. In the present study, adsorption of Pb2+, Cu2+, Fe2+, and Zn2+onto dried biomass of red seaweedKappaphycussp. was investigated as a function of pH, contact time, initial metal ion concentration, and temperature. The experimental data were evaluated by four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich) and four kinetic models (pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models). The adsorption process was feasible, spontaneous, and endothermic in nature. Functional groups in the biomass involved in metal adsorption process were revealed as carboxylic and sulfonic acids and sulfonate by Fourier transform infrared analysis. A total of nine error functions were applied to validate the models. We strongly suggest the analysis of error functions for validating adsorption isotherm and kinetic models using linear methods. The present work shows that the red seaweedKappaphycussp. can be used as a potentially low-cost biosorbent for the removal of heavy metal ions from aqueous solutions. Further study is warranted to evaluate its feasibility for the removal of heavy metals from the real environment.

scholarly journals Removal of heavy metals from aqueous solutions using Eucalyptus Camaldulensis: An alternate low cost adsorbent

2020 ◽  
Vol 6 (1) ◽  
pp. 1720892 ◽  
Author(s):  
Hirut Gebretsadik ◽  
Abraha Gebrekidan ◽  
Libargachew Demlie
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Eucalyptus Camaldulensis ◽  
Removal Of Heavy Metals

Study of the Cu(II) removal from aqueous solutions by adsorption on titania

2013 ◽  
Vol 12 (3) ◽  
pp. 239-247
Keyword(s):  
Heavy Metals ◽  
Ionic Strength ◽  
Toxic Metals ◽  
Low Cost ◽  
Lateral Interaction ◽  
Tio2 Surface ◽  
High Toxicity ◽  
Removal Of Heavy Metals ◽  
Solution Parameters ◽  
Kinetics Of

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.

Development of a method for detecting trace metals in aqueous solutions based on the coordination chemistry of hexahydrotriazines

The Analyst ◽  
2015 ◽  
Vol 140 (15) ◽  
pp. 5184-5189 ◽  
Author(s):  
Rudy J. Wojtecki ◽  
Alexander Y. Yuen ◽  
Thomas G. Zimmerman ◽  
Gavin O. Jones ◽  
Hans W. Horn ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Coordination Chemistry ◽  
Trace Metals ◽  
Aqueous Solutions ◽  
Detection System ◽  
Low Cost ◽  
System P ◽  
Chemical Indicator

The detection of trace amounts (<10 ppb) of heavy metals in aqueous solutions is described using hexahydrotriazines as a chemical indicator and a low cost fluorimeter-based detection system.

Removal of heavy metals from aqueous solutions using activated carbon prepared fromCicer arietinum

2010 ◽  
Vol 92 (8) ◽  
pp. 1447-1460 ◽  
Author(s):  
D.K.V. Ramana ◽  
K. Jamuna ◽  
B. Satyanarayana ◽  
B. Venkateswarlu ◽  
M. Madava Rao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Removal Of Heavy Metals

Removal of Heavy Metals by Low-Cost Adsorption Materials

2017 ◽  
pp. 127-184
Author(s):  
Siew-Teng. Ong ◽  
Sie-Tiong Ha ◽  
Pei-Sin Keng ◽  
Siew-Ling Lee ◽  
Yung-Tse Hung
Keyword(s):  
Heavy Metals ◽  
Low Cost ◽  
Removal Of Heavy Metals
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