Method for treating gaseous contamination using with ferrate

Abstract

The invention provides a method for disposing gas pollution making use of ferrate. In the method, the polluted gas is directly pumped into ferrate solution to achieve better effects on gas contaminant disposal after absorption and oxidation; the ferrate solution is prepared under the room temperature by adopting a diaphragm-typed electrolyser, taking the mixed solution of NaOH with low concentration and Na2SiO3 as electrolyte and electrolysing iron-based anodes under direct current. The method of the invention is suitable for being applied to the removal and disposal of gas contaminant such as volatile organic gas, sulphur and oxynitride in the flue gas and sulfureted hydrogen, etc. and prevents the secondary pollution at the same time; the prepared ferrate has good stability, easy recurrence and obvious disposal effects on the gas contaminant. The method of the invention has the advantages of simple and continuous technology, low cost, simple and convenient operation and mild conditions.

Description

technical field [0001] The invention relates to the field of environment, in particular to a method for controlling gas pollution by using ferrate. Background technique [0002] Air pollution is one of the most serious problems facing the survival and development of human society in the 21st century. The main gas pollutants are volatile organic compounds and sulfur dioxide-SO 2 and NOx-NO x . According to statistics, in 2005, the country's sulfur dioxide emissions were as high as 25.49 million tons, and the nitrogen oxide emissions were initially estimated at 22.2 million tons. The economic loss caused by air pollution in the whole country is hundreds of billions of yuan every year, which has become the main problem restricting the sustainable development of the national economy. Therefore, it is urgent to control the emission of gas pollutants. At present, the treatment of gas pollutants mainly includes combustion, photocatalysis, biological decomposition and plasma met...

AI Technical Summary

Problems solved by technology

However, the promotion of the above-mentioned application research is still limited at present: (1) the ferrate aqueous solution prepared by the current preparation method is poor in stability, which greatly weakens its performance; (2) the current preparation method has harsh conditions-usually requiring In the extreme conditions of saturated NaOH, the equipment requirements are high, which limits its direct application; (3) the yield is low, and the technology for large-scale production of solid reagents for reuse has not yet passed the level

[0004] The existing literature shows that there are no research and application examples of ferrate used in gas pollution control.

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