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Abstract
Organic compounds cause a major pollution problem in surface and groundwater as well as industrial wastewaters. Their presence in water can create a hazard to public health and the environment.
BTEX (benzene, toluene, ethylbenzene and xylenes) makes up one of the main groups of soluble organic compounds that find their way into our soil and groundwater because of their polarity and very soluble characteristic, BTEX’s will be able to enter the soil and groundwater systems and cause serious pollution problems.
Two main approaches have been developed for the remediation of aromatic polluted waters:
(a) The Biodegradation or Bioremediation
(b) The Alternative Physo-Chemical
Fenton process, as an catalytic oxidation technique that involve the production of the highly reactive hydroxyl radical (•OH) is of current interest for the destruction of organic pollutants (esp. BTEX) in surface and groundwater as well as industrial wastewater. However, Fenton oxidations take place usually in the acidic range near 3. This limits the applicability of Fenton process in environmental technology.
It was reported that organic chelators was add to the reaction medium to enhance the reactivity of Fenton reagent at pH value near neutral.
The scope of the present study is to examine the possible of some amino acids as an iron chelators in comparison with other known organic chelators in modified Fenton system for the catalytic degradation of BTEX pollutants. This in view of extending the optimum pH range of this process towards buffer capacity.