The primary focus on metallic nanoparticles in degradation
studies is based on zero-valent iron (nZVI), because of several desirable attributes such as high activity, low cost, easy obtainment of the starting material, and low toxicity [25-27].
For a single-unit system which degrades during the operation, the degradations
can be detected by sensors at equally spaced discrete time epochs k, k=0, 1, 2...NT, with [DELTA]t being the constant time interval between two consecutive observations.
Furthermore, most of these dyes are biorefractory and do not undergo effective degradation
using conventional biological techniques .
Keywords Attenuated total reflectance-Fourier transform infrared spectroscopy, Laser scanning confocal microscopy, Photoreactivity, Polymeric coating, Titanium dioxide, Ultraviolet degradation
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There are also chemical degradations
caused by the attack of microorganisms.
In recent years our group has been interested in the research of new aromatic thermoplastic polyethers containing carbonyl and sulfone linkages [6, 7], and a comparative kinetic study of the thermal and oxidative degradations
suggested that the cleavage of [SO.sub.2] group is the controlling process of the first degradation
stage of polymers containing a sulfone group in their repeating unit [8-11].
t curves appear at relatively late times, which confirms that the thermal oxidative degradations
are autocatalityc in nature (11) [ILLUSTRATION FOR FIGURE 3 OMITTED]).
Land and soil degradation
assessments have recently become more fashionable responding to environmental concerns in countries that have claimed its significant adverse impact on agronomic productivity, the environment, and its effect on food security and the quality of life.
There existed an induction period before degradation
or chain scission.
Among different semiconducting materials, titanium dioxide, a widely used photocatalyst for oxidizing degradation
of organics in the wastewater [2-5], is always preferred for its strong oxidizing ability, bulk nontoxicity, ready availability, and long-term stability [6-8].