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Loska and Wiechula applied PCA to analyze the possible origin of heavy metals in sediments from Rybnik Reservoir, and Li et al. also used this method to study heavy metals pollution around Jiaozhou Bay [9,10].
In the study by Qin et al. [11], chemical speciation of Pb, Cu, Zn, Fe, Mn and Ni in the surface sediments from Aha Lake in a dry season (Dec., 2008) were determined by the Tessier sequential extraction method.
The result concerning the chemical speciation of Pb, Cu, Zn, Fe, Mn and Ni in the surface sediments from Aha Lake (illustrated in Fig. 4) were based on the study by Qin et. al. [11].
Abd El-Azim and M.
El-Moselhy Kh: J.

Lassin, et al., Reactivity of waste generated during lead recycling: an integrated study, J. of Haz.
Smaniotto, et al., Qualitative lead extraction from recycled lead-acid batteries slag, J. of Haz.
Rodríguez,: Novedades en el reciclado de materiales en el sector de la construcción: Adiciones puzolánicas II, Jornadas de investigación en Construcción, Madrid, 2008, 1415-1424
De Angelis, et al, Reuse of residues arising from lead batteries recycle.
Saikia, et al, Assessment of Pb-slag, MSWI bottom ash and boiler and fly ash for using as a fine aggregate in cement mortar, J. of Haz.

Kwon, et al.
Di, et al., Optimization of glass fiber based core materials for vacuum insulation panels with laminated aluminum foils as envelopes.
Boafo, et al., Ultrafine glass fiber vacuum insulation panel for building insulation.
Wu, et al., Thermal Properties of Vacuum Insulation Panels with Glass Fiber.
Xu, et al., Ultrafine Glass Fiber Core Material Produced by Wet Method.

Experimental Study of the Possibility of Butt Friction Stir Welding on Polyethylene Pipes Djilali BOUHA1,a*, Laouni GAIDI2,b, Abdellah KAOU1,c, Boudjellel MOULAI ALI1,d, El Bahri OULD CHIKH1,e, Hadj Miloud MEDDAH 1,f, Athmane Khalifa BOUHA3,g 1LSTE Lab, 2 LES2M Lab, Faculty of Science and Technology, 3Faculty of Exact Sciences, Mascara University, BP. 763, Route de Mamounia, Mascara, 29000, Algeria adjilali.bouha@univ-mascara.dz, blgaidi@yahoo.fr, cabdellah.kaou@univ-mascara.dz., dboudjellel.moulaiali@univ-relizane.dz, eb.ouldchikh@univ-mascara.dz, fhmmeddah@yahoo.fr, gatmanedidi55@gmail.com Keywords: High-Density Polyethylene pipe (HDPE); Conventional Friction stir welding (C-FSW); clamping device; butt joint configuration.
Lammlein et al [15] in their research reported a lot of information about welding metal tubes, and they proved that this configuration can be done successfully with full penetration but there were some problems that emerged relating to the tool geometry, secondary heating, system eccentricity, and the method of internal support and tool disengagement.
Khellafi, El.
Meddah, El .Ould Chikh, Thermal Effect of Bobbin Tool Friction Stir Welding on the Mechanical Behavior of High Density Polyethylene Sheets, Defect and Diffusion Forum, 426 (2023) 93-114
Meddah, El.

Tsay et al [2] used the NMM to predict the crack growth path together with the crack opening displacement method; Ma et al [3] investigated the multiple crack problems by incorporating the singular physical covers in the NMM; Zhang et al [4] studied the complex crack growth problems with the NMM.
Zhang, et al, Modeling complex crack problems using the numerical manifold method, Int.
An, et al, Numerical analysis of 2-D crack propagation problems using the numerical manifold method, Eng.
[7] E.L.

Mean-while, PBI solid-state el-ectrolyte is another thing we want to synthesis.
Park et al.[8] use DN gels as solid electrolyte in supercapacitor.
Park et al.[10] use H3PO4-doped PBI as solid-state electrolyte and construct supercapacitor.
Meanwhile, PBI solid-state el-ectrolyte is another thing we want to synthesis.
Wang et al.[15] deign a porous PBI/ionic liquid(IL) electrolyte.

AA2198 and AA2050 are used to illustrate the potential of these higher damage tolerance Al-Cu-Li alloys.
This effect is illustrated for the Al-Cu-Mg alloys in table 2 and figures 2 and 3 below.
Cold work levels go from 2% to 12% (increasing strength) and correspond to the data in figure 3a. 2.3 Al-Cu-Li alloys Another high potential approach for alloy performance improvements is the optimisation of Al-CuLi-(Mg-Ag-Zn) alloys.
Positioning of selected Al-Cu-Li alloys in Li and Cu concentrations.
TYS(LT) UTS(LT) El(L) Kapp(T-L) Keff(T-L) ∆aeff max (T-L) MPa MPa % MPa√m MPa√m mm 2098-T8 530 555 12 103 112 10 2198-T8 470 510 12 140 171 45 The improved property balance of 2198-T8 vs 2098-T8 (see table 3, figure 6) provides an example of the trends illustrated in figure 5.

In this paper the use of Mg/Al-CO3 Layered double hydroxide (Mg/Al-CO3 LDH) for the removal of reactive red (C.
Mg/Al-CO3 LDHs were prepared by coprecipitation. 100mL of Mg/Al solution (0.5mol/L MgCl2 + AlCl3) with Mg/Al molar ratios ranging from 1 to 5 were added dropwise to 100mL of mixed solution of NaOH (OH-/(Mg+Al)=1.6) and NaCO3 (CO32-/Al3+=2) at 1 mL/min and 25°C with stirring.
Therefore, the optimum Mg/Al molar ratio of Mg/Al LDH was selected as 3 for further experiments.
Effect of molar ratio of Mg/Al on adsorption.
El-Shazly, “ Kinetics and equilibrium modeling of Se(IV) removal from aqueous solutions using metal oxides, ”Chemical Engineering Journal, vol, 160 , pp. 63-71, 2010

Similar results were reported by Fang et al[31], G.Li et al[34], R.Claessen et al[35], and U.
Dutta et al[12].
Bayliss et al[10].
[8] A.L.
El-Kouch, L.E.

Breaking the mirror symmetry introduces two types of reconstruction defects termed mirror solitons by Bulatov et al
Higgs et al. [110] found that low concentrations of transition metals (Cu, Fe, Ni) cause the D-band luminescence.
Further increase of temperature to 300 K caused further decrease in the EL efficiency.
The dislocation network is positioned in a depth of about 45 nm (b) EL spectra of the MOS-LED at 80 and 210 K.
The EL data are normalized on tunnelling current values.