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The dump material is mainly fine grained due to former coal washing processes, and has an enhanced water permeability.
In particular, the drainage ditch contained large numbers of iron- and sulfate-reducers.

Space group number is 62 (Pnma) and its lattice parameters are a = 5.7742, b = 8.1443, c = 5.7037, a = 90o, b = 90o and g = 90o.
It was found that this powder morphology seemed to have 2 characteristics containing equiaxed and plate-shaped grains.

Through a large number of orthogonal experiments, the optimal calcination temperature is 500 ℃, and the calcination time is 2h; then change the doping amount of Ce3+ or Fe3+, temperature and the calcination time to do the orthogonal experiment again.
Analysis of SEM's characterization (a) 1:200, 000 (pure TiO2) (b) 1:2, 000, 000(Ce/TiO2) (c) 1:2, 000, 000 (Fe/TiO2) Fig.2 SEM pictures of nano-TiO2 under different conditions Fig.2Picture (a) shows that, at 500℃, pure TiO2 has appeared reunion phenomenon while its lattices are good; in Fig2picture (b), TiO2 doped with Ce shows a majority of crystal grains whose sizes are within the range of 10-30nm, and has relatively complete lattices, while at 550˚C, there are a few comparatively large reunion particles, the overall dispersion effect is relatively good, relatively playing its photocatalytic activity.

For machining was used milling cutter 100B06R-SMORP12X-B (fig. 1) with these parameters: external diameter 100 mm, number of teeth = 6, tool back rake gp = 5°, tool side rake gf = 0° [9].
Fig. 1 Milling cutter 100B06R-SMORP12X-B with cemented carbide inserts Four commercial coated carbide inserts (micro-grain hard metal and PVD multilayer coating TiN/TiAlN, resp.

These ferrites can be synthesized by a number of methods such as combustion[2], ceramic[3], co-precipitation[4], precursor[5], hydrothermal method[6], sol-gel[7], refluxing[8], high-energy milling[9], etc.
A typical grain is about 33 nm after microwave heating at 860℃ for 30min while the powder has a single-phase (Ni0.5Zn0.5)Fe2O4 structure. 2.

In 200 B.C Chinese and Persian were also used simple windmills for pumping water and grinding grains [2].
They used Markov chain to determine the number of sub sections.

Yang et al. [3, 4] developed the LY12M hat-section profiles using the rotary draw bending machine, the effects of side pressure, stretching force and the number of rotary draw bending on the springback and section distortion were investigated.
Wu et al. [7, 8] investigated the influences of temperature, bending velocity and original grain size on the ovality, wall-thinning and springback of AM30 magnesium alloy tubes during the rotary draw bending process.

So far, there exist many research methods of display of crystal boundary, such as hydrocarbonylation, net pearlite method, heating and slow cooling method, grain boundary corrosion method, martensitic corrosion method and meshed cementation process and so on[1-6].
A large number of crystal cells with the same bits make up a crystal.

Debye-Scherrer analyses of the highest intensity (111) peak at full width at half maximum intensity (FWHM) shows grain size of ~41 nm, which means a crystal growth of b-SiC at 1200 °C.
Fig.4 (b) shows a large number of long fibers pulling out, and the surfaces of carbon fibers are retaining almost the original form, which means that the fiber/matrix interfacial bonding is moderate or even weak.

For the JCPDS file number 01-075-2230, and 00-040-1516 corresponds to calcite and chitosan phase, respectively.
While, the morphologies of the eggshells is seen that the ES-PD samples have the porous scattered all over samples and the pattern like stack of lamella foliated and disoriented foliated grains Fig. 3.