Liquid Phase Rhodamine Boxidation Induced by Plasma with Glow Discharge Electrolysis

Exhaustive Rhodamine B oxidation by means of contact glow discharge plasma in aqueous solution has been investigated. The rate of degradation in different conditions such as pH、H2O2、Fe2+、n-butanol, and other factors affecting was studied. The results showed that, there are faster removal rate when the solution was in a relatively higher acidity; H2O2presence can improve the efficiency rate.Fe2+can promote reaction. Radical scavenger, n-butanol, inhibits the Rhodamine B removal significantly. Some major intermediate products were detected by HPLC and GC-MS, respectively.

Download Full-text

PARAMETERS OF A GLOW DISCHARGE PLASMA ABOVE SURFACE OF THE ALUMINIUM SULFATE AQUEOUS SOLUTION

Scientific Herald of Uzhhorod University Series Physics ◽

10.24144/2415-8038.2014.36.107-111 ◽

2014 ◽

Vol 36 (0) ◽

pp. 107-111

Author(s):

Л. В. Месарош ◽

О. К. Шуаібов ◽

М. П. Чучман

Keyword(s):

Aqueous Solution ◽

Glow Discharge ◽

Discharge Plasma ◽

Glow Discharge Plasma ◽

Aluminium Sulfate

Download Full-text

Phthalate degradation by glow discharge plasma enhanced with pyrite in aqueous solution

Water Science & Technology ◽

10.2166/wst.2016.316 ◽

2016 ◽

Vol 74 (6) ◽

pp. 1365-1375 ◽

Cited By ~ 3

Author(s):

Chensi Shen ◽

Shaoshuai Wu ◽

Hui Chen ◽

Sadia Rashid ◽

Yuezhong Wen

Keyword(s):

Aqueous Solution ◽

Energy Efficiency ◽

Glow Discharge ◽

Discharge Plasma ◽

Ph Value ◽

Glow Discharge Plasma ◽

Methyl Tert Butyl Ether ◽

Butyl Ether ◽

Polymeric Compound ◽

X Ray

In order to prevent health risk from potential exposures to phthalates, a glow discharge plasma (GDP) process was applied for phthalate degradation in aqueous solution. The results revealed that the phthalate derivatives 4-hydroxyphthalic acid, 4-methylphthalic acid and 4-tert-butylphthalic anhydride could be degraded efficiently in GDP process (498 V, 0.2 A) with high removal efficiencies of over 99% in 60 minutes. Additionally, pyrite as a promising heterogeneous iron source in the Fenton reaction was found to be favorable for GDP process. The phthalate degradation reaction could be significantly enhanced by the continuous formation of •OH and the inhibition of the quenching reaction in the pyrite Fenton system due to the constant dissolution of Fe(II) from pyrite surface. Meanwhile, the initial pH value showed little impact on the degradation of phthalates and the energy efficiency of GDP system for phthalate degradation ranged between 0.280 × 10−9 and 1.210 × 10−9 mol/J, which is similar to the GDP system with phenol, bisphenol A and methyl tert-butyl ether as the substrates. Further, the X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy analyses indicated that the pyrite was relatively stable in GDP system and there was no obvious polymeric compound formed on the catalyst surface. Overall, this GDP process offers high removal efficiency, simple technology, considerable energy efficiency and the applicability to salt-containing phthalate wastewater.

Download Full-text