Potential Of Plasma Treatment Research Articles

Potential of plasma treatment as water reclamation process for irrigation

A plasma-ozonation system was investigated as a possible method for the reclamation of pesticide contaminated water. A multi-wire to plate corona discharge in oxygen was used, operated in pulsed regime (110 ns full width at half maximum). The synthetic contaminated water contained 25 mg l−1 2,4-dichlorophenoxyacetic acid (2,4-D) in tap water. Complete degradation of 2,4-D and over 90% mineralization were achieved during treatment. The toxicity of the reclaimed water was assessed using seeds of Solanum lycopersicum, known to be sensitive to 2,4-D. It was found that plant growth was inhibited by the presence of the pesticide, however, the treatment reduced the toxicity of the contaminated water. The plasma-ozonation method has proved thus far a good candidate for water reclamation for agriculture.

HYDRATION OF PLASMA-TREATED ALUMOSILICATE BINDERS

Plasma treatment offers several applications in material science. In this research, the potential of plasma treatment is explored on the hydration of hydrophilic CNT-enriched cement and hydrophilic fly ash. The evolution of the hydration heat and the compressive strength show that a hydrophilic surface slightly accelerates the early-age hydration kinetics, while the long-term properties remain unchanged.

Doppelt induktiv gekoppeltes Niederdruckplasma zur Sterilisation von medizinischen Implantatmaterialien / A double inductively coupled low-pressure plasma for sterilization of medical implant materials

The potential of plasma treatment in medicine is only slowly gaining acceptance. Inactivation of germs through exposure to UV radiation produced by plasma discharges and sterilization of medical implant devices and instruments is one possible application of this technique. In addition, due to the manifold possibilities of coating through plasma processes, quick sterilization-coating combinations of medical implant devices are possible. To analyze the effectiveness of this sterilization process on different material surfaces, three different alloys (X2CrNiMo18-15-3, Ti6Al7Nb and Ti6Al4V) and one thermoplastic material (ultra-high molecular weight polyethylene, UHMWPE), commonly used in medical implant devices, were examined in the presented study. After spraying Bacillus atrophaeus spores (10(6) CFU) on the surfaces of four different implant materials tested in this study (X2CrNiMo18-15-3, UHMWPE, Ti6Al7Nb and Ti6Al4V), it was demonstrated in each of four gas mixtures used (Ar, Ar:O2, Ar:H2 and Ar:N2) that due to the application of inductively coupled low-pressure plasma technique, plain medical implant materials can be sterilized rapidly, and can be protective and efficient.