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Sharif university develops nanoadsorbents to treat wastewater

May 20, 2014

Iranian researchers from Sharif University of Technology used nanotechnology to produce highly efficient adsorbents to remove heavy metals from industrial wastewater.

According to Fars News Agency, this invention is a big step toward the application of nanomaterials in water purification.

The size of particles in the nanoadsorbent is 20 nm, which is suitable for the removal of nickel, cobalt and barium ions from water.

A small amount of the nanoadsorbent can be used for removing heavy metals since its efficiency is high. Therefore, it results in decreasing operational costs.

The researchers also presented a correlation that expresses the kinetics of the reaction by taking into consideration various parameters effective on the sorption efficiency.

According to the researchers, zeolite is one of the most promising materials among various inorganic adsorbents to carry out metal purification process. Low cost is the advantage of zeolite compared with various types of resins. The adsorbent was produced by depositing platinum nanoparticles on a bed of Zeolite A4.

Surface sorption was used in the removal of metallic ions by using the nanoadsorbent. The process is cheaper than other separation methods, such as fractional distillation or extraction.

Contrary to some separation methods, including solvent extraction, surface sorption in fixed beds is a direct separation method that does not need any supplementary process.

Results of the research showed that the amount of sorption increases as the amount of adsorbent increases.

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Source: Iran Daily

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