scholarly journals Treatment of Wastewater. Removal of Heavy Metals by Nanofiltration. Case Study: Use of TFC Membranes to Separate Cr (VI) in Industrial Pilot Plant

2012 ◽  
Vol 44 ◽  
pp. 2020-2022 ◽  
Author(s):  
J.A. Otero ◽  
O. Mazarrasa ◽  
A. Otero-Fernández ◽  
M.D. Fernández ◽  
A. Hernández ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Pilot Plant ◽  
Removal Of Heavy Metals

An“ex situ”microbial process for the removal of heavy metals from polluted soil: A case study of Ada rice field, Adani, Enugu State, Nigeria

2017 ◽  
Vol 21 (3-4) ◽  
pp. 128-137 ◽  
Author(s):  
Charles O. Nwuche ◽  
Oguejiofo T. Ujam ◽  
Janefrances N. Ihedioha ◽  
Charles C. Chime
Keyword(s):  
Heavy Metals ◽  
Rice Field ◽  
Polluted Soil ◽  
Ex Situ ◽  
Microbial Process ◽  
Removal Of Heavy Metals ◽  
Enugu State

Bioleaching of heavy metals from contaminated aquatic sediments using indigenous sulfur-oxidizing bacteria: a feasibility study

1998 ◽  
Vol 37 (6-7) ◽  
pp. 387-394 ◽  
Author(s):  
H. Seidel ◽  
J. Ondruschka ◽  
P. Morgenstern ◽  
U. Stottmeister
Keyword(s):  
Heavy Metals ◽  
Pilot Plant ◽  
River Sediments ◽  
Chemical Properties ◽  
Leaching Potential ◽  
Removal Of Heavy Metals ◽  
Sulfur Oxidizing ◽  
Physical And Chemical ◽  
Better Than ◽  
Sulfur Oxidizing Bacteria

The removal of heavy metals from contaminated river sediments was studied using suspension leaching under laboratory conditions and percolation leaching in a pilot plant. The leaching potential of indigenous sulfur-oxidizing bacteria was compared with acid treatment. Bioleaching with elemental sulfur as substrate was found to be better than treatment with sulfuric acid for the solubilization of all metals tested. The physical and chemical properties of the sediments used in this study did not affect leaching capacity under optimum conditions in the laboratory. Under the practical conditions in the pilot plant, the redox state of sludge had a considerable influence on leaching efficiency. In a deposited oxic sediment with good permeability, about 62% of the metals tested were removed by percolation leaching after 120 days. Zn, Cd, Ni, Co and Mn were sufficiently leached to enable treated sediments to be reused as soil. In a freshly dredged anoxic sediment, only a total of 9 % of metals were removed. The results indicate that freshly dredged sediments need to undergo pretreatment before percolation leaching to improve mass transfer and to activate the leaching active bacteria.

Elaborate design of polymeric nanocomposites with Mg(ii)-buffering nanochannels for highly efficient and selective removal of heavy metals from water: case study for Cu(ii)

2018 ◽  
Vol 5 (10) ◽  
pp. 2440-2451 ◽  
Author(s):  
Qina Sun ◽  
Yujia Yang ◽  
Zhixue Zhao ◽  
Qingrui Zhang ◽  
Xinmei Zhao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Oxide ◽  
Selective Removal ◽  
Polymeric Nanocomposites ◽  
Highly Efficient ◽  
Removal Of Heavy Metals ◽  
Nanostructured Metal

Zr/Mg oxide-PS was designed to extend the applicability of nanostructured metal oxide bearing composites to Cu(ii) removal in acidic wastewaters.

Highly effective removal of heavy metals by polymer-based zirconium phosphate: A case study of lead ion

2007 ◽  
Vol 310 (1) ◽  
pp. 99-105 ◽  
Author(s):  
B.C. Pan ◽  
Q.R. Zhang ◽  
W.M. Zhang ◽  
B.J. Pan ◽  
W. Du ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Zirconium Phosphate ◽  
Lead Ion ◽  
Effective Removal ◽  
Highly Effective ◽  
Removal Of Heavy Metals

Biosorption: An Eco-Friendly Technique for the Removal of Heavy Metals

2011 ◽  
Vol 2 (3) ◽  
pp. 1-8 ◽  
Author(s):  
Sasmita Sabat ◽  
◽  
R V Kavitha R V Kavitha ◽  
Shantha S L Shantha S L ◽  
Gopika Nair ◽  
...  
Keyword(s):  
Heavy Metals ◽  
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.

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