Aqueous chlorination kinetics and mechanism of substituted dihydroxybenzenes
Article Abstract:
The chlorination of resorcinol through dichlororesorcinol was evaluated using a series of chlorine-substituted resorcinol substrates. Their initial chlorination kinetics were examined over the pH range of two to 12 at 12 degrees Celsius. The apparent chlorination rates for each of the resorcinol substrates are a minimum in the pH range of three to six and a maximum in the pH range of eight to 11. A mechanism involving the reaction of HOCl with ArX(OH)2, ArX(OH)O- and ArX(O-)2 and an acid-catalyzed pathway at pH<4 is presented to explain such pH dependence.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Colloid deposition rates on silica bed media and artifacts related to collector surface preparation methods
Article Abstract:
Colloid deposition rates in porous media are studied under unfavorable filtration conditions using colector surface preparation methods. Experiments are conducted wherein soda-lime glass beads and crystalline quartzsand beads are filtered by means of glass chromathography. The beads' deposition rates are then determined in terms of the collection efficiency. Results show that the proper selection of preparation methods and porous medium play a significant role in the determination of the beads' attachment efficiencies.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
Chlorinated structures in high molecular weight organic matter isolated from fresh and decaying plant material and soil
Article Abstract:
Recent studies have proven that the presence of organohalogens in relatively unpolluted environments are caused by the natural halogenation of organic macromolecules. No evidence of chlorinated aromatic structures can be found in samples taken from fresh plant matter. The two samples, fresh and decaying plant materials which were isolated by acidic solvolysis and spruce forest and meadow grass soil samples with high molecular weight, yielded several benzoic acid derivatives after undergoing oxidative degradation.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Explosive evolution in Tertiary birds and animals. Mechanisms of punctuated evolution. Evolution made visible
- Abstracts: Simultaneous complexation of organic compounds and heavy metals by a modified cyclodextrin. Cyclopentanol-enhanced solubilization of polycyclic aromatic hydrocarbons by cyclodextrins
- Abstracts: Sorption of toxic organic compounds on wastewater solids: mechanism and modeling. Impact of chlorophenols and chloroanilines on the kinetics of acetoclastic methanogenesis
- Abstracts: Highly Visible, Curiously Intangible. Genetic data and the African origin of humans
- Abstracts: Celebrating a Century of Physics, en Masse. Farsighted gravity lens sees stars. Putting some sizzle in the corona