Radiation-induced reactions of 2,4,6-trinitrotoluene in aqueous solution

Article Abstract:

Radiolysis of aqueous solutions of 2,4,6-trinitrotoluene (TNT) was studied to furnish fundamental information about the reactions of TNT with radical species in water, and thus expedite remediation technologies at TNT-contaminated sites. In addition to radical scavengers, gamma radiation was used to compare yields for radiation-induced TNT transformation under oxidizing and reducing conditions, and in the presence and absence of oxygen. Pulse radiolytic techniques were utilized to ascertain rate constants and adsorption spectra for the reactions of TNT with the hydroxyl radical and the aqueous electron. It was found that the reactions of TNT with reduced oxygen species are highly inefficient in aqueous solution, while TNT degradation yields in the absence of a radical scavenger were low.

Comment:

Radiolysis of aqueous solutions of TNT was studied to furnish fundamental info on reactions of TNT w/ radical species in water

---

Uptake and transformation of TNT by hybrid poplar trees

Article Abstract:

Hybrid poplar trees were studied for their potential to remediate sites contaminated with 2,4,6-trinitrotoluene (TNT), a high explosive which has contaminated soil and groundwater in many countries due to improper handling. In particular, the study evaluated the translocation and fate of TNT in a poplar tree hybrid, Populus sp. deltoidesXnigra, DN34, while seeking to identify transformation products that must be considered prior to the remediation of TNT contamination. It was found that TNT was transformed by the tree to 4-amino-2,6-dinitrotoluene (4-ADNT), 2-amino-4,6-dinitrotoluene (2-ADNT) and to several unidentified compounds which are more polar than TNT. The fate and toxicity of these metabolites must be acknowleged by phytoremediation efforts.

---

Using dissolved humic acid to remove hydrophobic contaminants from water by complexation-flocculation process

Article Abstract:

Dissolved humic acid (DHA) was studied for its feasibility as a complexing agent to remove hydrophobic contaminants from water using complexation-flocculation process. The study particularly studied the removal of three polycyclic aromatic hydrocarbons (PAHs) using the treatment process. The treatment process encompasses the complexation stage, wherein DHA is added to the contaminated water and allowed to interact with the dissolved contaminants; and the flocculation stage, wherein alum or ferric chloride was added as flocculant to result in precipitation and flocculation of the DHA and the associated contaminant. It was found that DHA-PAH complexes did not disintegrate upon addition of the flocculant and were effectively removed by flocculation.

Comment:

Dissolved humic acid can be used as complexing agent to remove hydrophobic contaminants from water via complexation-flocculation

Water Pollution

Similar abstracts:

• Abstracts: Mechanisms of ionizing radiation-induced destruction of 2,6-dichlorobiphenyl in aqueous solutions. Identification and quantification of monobromopolychlorobiphenyls in Baltic ringed seal and a technical PCB (Clophen A50)
• Abstracts: Dechlorination of trichloroethene in aqueous solution using Fe0. Surfactant-enhanced remediation of a trichloroethene-contaminated aquifer. 1. transport of Triton X-100
• Abstracts: Corrinoid-mediated reduction of tetrachloroethene, trichloroethene, and trichlorofluoroethene in homogeneous aqueous solution: reaction kinetics and reaction mechanisms
• Abstracts: Elution of pyrene from activated carbon into an aqueous system containing humic acid. Identification of Exxon Valdez oil in sediments and tissues from Prince William Sound and the northwestern gulf of Alaska based on a PAH weathering model
• Abstracts: Degradation photoinduced by Fe(III): method of alkylphenol ethoxylates removal in water. Aromatic compound degradation in water using a combination of sonolysis and ozonolysis

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.