Single-step treatment of 2,4-dinitrotoluene via zero-valent metal reduction and chemical oxidation.
Many nitroaromatic compounds (NACs) are considered toxic and potential carcinogens. The purpose of this study was to develop an integrated reductive/oxidative process for treating NACs contaminated waters. The process consists of the combination of zero-valent iron and an ozonation based treatment technique. Corrosion promoters are added to the contaminated water to minimize passivation of the metallic species. Water contaminated with 2,4-dinitrotoluene (DNT) was treated with the integrated process using a recirculated batch reactor. It was demonstrated that addition of corrosion promoters to the contaminated water enhances the reduction of 2,4-DNT with zero-valent iron. The addition of corrosion promoters resulted in 62% decrease in 2,4-DNT concentration to 2,4-diaminotoluene. The data shows that iron reduced the 2,4-DNT and ozone oxidized these products resulting in a 73% removal of TOC and a 96% decrease in 2,4-DNT concentration.
Thomas
J Mathew
JM
Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, MS 39762, USA.
Hernandez
Rafael
R
Kuo
Chiang-Hai
CH
D002712:Chlorides; D004136:Dinitrobenzenes / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D002712:Chlorides; D004136:Dinitrobenzenes; D005290:Ferric Compounds; D016877:Oxidants; D014874:Water Pollutants, Chemical; D012965:Sodium Chloride; D010126:Ozone; C016403:2,4-dinitrotoluene; D007501:Iron; C024555:ferric chloride