title: Retention-oxidation-adsorption process for emergent treatment of organic liquid spills.
abstract: The feasibility and effectiveness of retention-oxidation-adsorption process (ROA) for the elimination of organic contaminants induced by chemical accidents were investigated in this study. Organobentonites (DTMA-, TTA-, CTMA- and OTMA-bentonite), potassium ferrate (Fe(VI)), ozone and granular activated carbon (GAC) were used as rapid and efficient materials in the treatment and recovery of organic liquid spills. Results indicated that the retention capacities of organobentonites (especially CTMA-bentonite) were much higher than that of natural bentonite towards the chosen organic compounds. Additionally, pH, oxidant dosage, initial concentration of contaminant and chemical structure had significant influences on the effectiveness of the oxidation process. In a pilot-scale experiment, the ferrate/GAC (F/G) and ozone/GAC (O/G) processes made a comparatively good performance in the treatment of wastewater containing aniline or nitrobenzene, with the removal efficiencies of the contaminants greater than 80%. Overall, the ROA process showed a high efficiency and steady operation in the removal of hazardous organic liquids and subsequent clean up of the contaminated site.
authors: Institute of Industrial Ecology and Environment, Zhejiang University, Hangzhou 310027, PR China.
authors: Xianjun
authors: X
authors: Liu
authors: Yu
authors: Y
authors: Li
authors: Xingwang
authors: X
authors: Zhang
authors: Lecheng
authors: L
authors: Lei
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry; D005240:Feasibility Studies; D005290:Ferric Compounds / Q000737:chemistry; D009930:Organic Chemicals / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D010865:Pilot Projects
chemical_list: D005290:Ferric Compounds; D009930:Organic Chemicals; D001546:Bentonite; D010126:Ozone