Catalytic and Non-Catalytic Treatment of Industrial Wastewater under the Exposure of Non-Thermal Plasma Jet

被引:11
作者
Shukrullah, Shazia [1 ]
Bashir, Warda [1 ]
Altaf, Noor Ul Huda [1 ]
Khan, Yasin [2 ]
Al-Arainy, Abdulrehman Ali [2 ]
Sheikh, Toqeer Ahmad [2 ]
机构
[1] Univ Agr Faisalabad, Dept Phys, Faisalabad 38040, Pakistan
[2] King Saud Univ, Dept Elect Engn, Coll Engn, Riyadh 11451, Saudi Arabia
关键词
contaminated water; non-thermal plasma; DC plasma jet; TiO2; catalyst; oxidation; DISCHARGE PLASMA; AQUEOUS-SOLUTIONS; METHYLENE-BLUE; GLOW-DISCHARGE; TEXTILE DYES; DEGRADATION; ENHANCEMENT; POLLUTANTS; REMOVAL; ACIDITY;
D O I
10.3390/pr8060667
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Freshwater is only 2.5% of the total water on the Earth and rest is contaminated or brackish. Various physical and chemical techniques are being used to purify the contaminated water. This study deals with catalytic plasma treatment of contaminated water collected from different sites of Faisalabad-Pakistan. A non-thermal DC plasma jet technique was used to treat the water samples in the presence of TiO(2)catalyst. The plasma-assisted catalytic treatment introduced some oxidative species (O-3, H2O2, HO2-, OH-) in the water. These species reacted with pollutants and cause the degradation of harmful contaminants, especially dyes. The degradation of dye sample during plasma treatment was more pronounced as compared to other samples. pH, conductivity and TDS of dye containing sample decreased after catalytic plasma treatment. The degradation of organic pollutants increased due to presence of several oxidants, such as TiO2, ferrous ions and hydrogen peroxide. FT-IR analysis revealed the degradation of some functional groups during treatment process and confirmed the effectiveness of the process. The residue of the treated samples was consisted of amines, amides and N-H functional groups. XRD analysis showed the presence of Alite, Ferrite, aluminate, Si, S and some heavy metals in the residue. The effect of plasma treatment on activity of gram-negative Escherichia coli (E. coli) bacteria in water was also checked. The bacterial activity was reduced by almost 50% after 2 min of plasma treatment.
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页数:15
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