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In a hydrolysis and acidification tank, COD were removed by sedimentation, bio-adsorption, biological flocculation, et al. and those COD were mainly not dissolved.
El-Kalliny, “Fenton-biological treatment processes for the removal of some pharmaceuticals from industrial wastewater,” Journal of Hazardous Materials.

This reaction can be described as 2H2O® O2 + 4H+ + 4e- (3) According to McLaughlin et al [15], the dynamic performance of the device can be predicted by solving the diffusion equation using an applied voltage step, independent of the electrode size and geometry.
El.

El-Eswed, R.I.
Al-Gharabli, F.

Khalil H.P.S, volume 11 of Woodhead Publishing Series in Composites Science and Engineering, p. 261-276 [3] A.L.
El-Wakil and A.

Al Rashid, M.E.
El-Hawary, in Application of Computational Intelligence Techniques for Solving the Revived Optimal Power Flow Problem, (Electric Power Systems Research 79, 2009) [4] Miranda.

According to Fowler et. al. [4], composite material can be defined as biocomposite when at least one of the components is derived from natural resources.
El-kader: vol. 6, no. 13, p. 454–462, 2012

Informe Técnicos-El sismo de Tehuacán del 15 de junio de 1999.
La realidad geológica, una amenaza al patrimonio cultural de México.

Malek1 1 Centre de Développement des Technologies Avancées DMIL-ILM, Cité 20 août 1956, BP17, Baba Hassen, Alger, Algérie 2 Faculté de Physique, USTHB, BP23 El Alia Bab Ezzouar, Alger e email :tkerdja@cdta.dz Keywords: Laser ablation, phase explosion, silicon, titanium, high laser intensity Abstract.
(a) (b) (c) Fig. 2: SEM image of the crater produced by a single laser shot on silicon at (a) 4.2×109W.cm -2 (b) 5,10×1010W.cm -2 and (c) by ten laser shots at 5.10×10 10W.cm -2 (a) (b) (c) Fig. 3: SEM image of the crater produced on titanium (a)by a single laser shot at 4.65×109W.cm -2(b) by ten laser shots at 4.96×1010W.cm -2 and(c) by twenty laser shots at 4.96×1010W.cm -2 Zheng et al [11] have suggested that the velocity distribution of the expanding atoms in the plume is described by the theory of isentropic supersonic expansion, and according to this model, the velocity distribution is successfully fitted by the so-called center-of-mass Maxwell-Boltzmann (CMMB) distribution function.

El-Diasty, Optical properties of oxide glasses containing transition metals: case of titanium- and chromium-containing glasses, Curr.
Rodriguez, et al., Impact of tellurite-based glass structure on raman gain, Chem.

Most of the warm compaction researches and applications were concerning the iron-base materials; Ngai et al. applied the warm compaction technique in the fabrication of copper and Cu-based metal matrix composite [12].
El-Raghy: J.