A study carried out by Dr. Germán Tenorio Rivas, a member of the research group “Solids concentration and bioremediation” from the Department of Chemical Engineering of the University of Granada (Universidad de Granada[http://www.ugr.es]) has found an interesting use for the apparently useless olive stones: they eliminate hard metals –chrome, to be precise- by biosorption in sewage water from industries such as painting, tannery or galvanizing industry.
Biosorption is a physical and chemical process, which enables certain types of biomass –for example, agricultural residues- to retain the hard metals found in industrial sewage water. The main advantage of this research is that olive stones are used. Germán Tenorio points out: “We don't need to bring it from anywhere else, we already produce it here, and we produce a great amount. It is also clean and cheap”.
The process of biosorption of chrome by olive stones stems from their capacity to retain metallic ions in their surface. As the UGR scientist explains: “This is due to the difference in electrical charges. Olive stones are negatively charged, whereas metal is positively charged. That is the reason why they come together, thanks to ionic attraction”.
The process of biosorption can be a good substitute for other processes such as precipitation which are far more complex and expensive. The aforementioned researcher explains : “Unlike these processes, the use of olive stones as a biosorption mechanism produces no subproducts which are then difficult to deal with, for instance, metal concentrated mud”. Two products are obtained during this process: water free of pollutants and the olive stones with the retained metal. “This metal can be used later”. The olive stones can also be used as biomass to obtain energy, as they are agricultural residues.
The research carried out in the University of Granada means a step forward in the field of the biosorption of metals. It will be the basis for the development of new technologies to make it possible to depollute by removing metals in water residues.
Antonio Marín Ruiz | alfa
Upcycling of PET Bottles: New Ideas for Resource Cycles in Germany
25.06.2018 | Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF
Dry landscapes can increase disease transmission
20.06.2018 | Forschungsverbund Berlin e.V.
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences