Search results

Wastewater sorts Discharged flow rate (m3/d) Pollutant factors 1 Nickel wastewater 5 Ni2+<963.5 mg/L, pH=3-4, CODcr<300 mg/L 2 Low concentration washing wastewater 916.4 SS<80 mg/L, NH4+-N<27 mg/L, P<3 mg/L, pH=3-4, CODcr =100-200 mg/L 3 High concentration acidic wastewater 10 TP<11000 mg/L, pH<2, CODcr <100 mg/L 4 Degreasing wastewater 58 TP<120 mg/L, pH>8, CODcr <2000 mg/L 5 Chromium wastewater 150.1 Cr6+<100 mg/L, pH=1-2, CODcr <100 mg/L 6 Dye wastewater 40 pH=9-10, CODcr <3000 mg/L 7 Fluorine wastewater 35.3 F-<80 mg/L, NH4+-N <25 mg/L, pH=9-10, CODcr <100 mg/L 8 Exhaust gas washing wastewater 7.5 NH4+-N <6 mg/L, TP<3 mg/L, SS<80 mg/L, pH=9-10, CODcr <100 mg/L 9 Mixed wastewater derived from washing, up-flow regeneration and boiler 67.7 NH4+-N <6 mg/L, TP<3 mg/L, SS<80 mg/L, pH=3-10, CODcr =100-200 mgL 10 Domestic sewage 30 NH4+-N <26 mg/L, TP<3 mg/L, SS<80 mg/L, pH=6-9, CODcr =300-400 mg/L According to the data shown in Table 1, the discharged flow rate of the compositive wastewater
The treatment methods of chromium wastewater include mainly chemical reduction, electroanalysis, ion exchange, activated carbon adsorption and evaporation concentration and so on.
The chemical reduction is generally used at home and abroad, which was also employed as the main treatment technology for the conversion of Cr6+ to Cr3+.

Particularly, the rapid solidification lead to microstructure refinement, extension of the solid solubility of alloying elements, reduction of the alloying elements segregation and the development of transition and metastable phases that are not observed during conventional casting [1-3].
As-compressed billets were extruded at ~670K with the cross-section reduction ratio of l=19 and as extruded rods of 7 mm in diameter were used in experiments described below.
According to literature data [8-11] in Al-Mn systems formation of quasicrystals or metastable phases can be observed.

Research data show that if not to strengthen the management of nitrogen oxides in flue gas, the amount of nitrogen oxides and the proportion in atmospheric pollutants will rise and may replace the sulfur dioxide becoming the main pollution.
(In Chinese) [3] Shiguo Wang, Xiaodong Huang: The Development of Catalysts for Selective Catalytic Reduction of NOX in Flue Gas[J], China Chemicals, 5, 55-60, (2009).
[10] J H Li, J M Hao, L X Fu, et a1: The activity and characterization of sol-gel Sn/Al2O3 catalyst for selective catalytic reduction of NOX in the presence of oxygen[J], Catal Today, 90, 215-221, (2004).

Thermal decomposition characteristics of calcium based organic compounds under carbon dioxide enriched atmosphere through thermogravimetric analysis Shengli Niu1,a, Yingjie Li1,b, Kuihua Han1,c, Jianli Zhao1,d and Chunmei Lu1,e 1National Engineering Laboratory for Coal–Burning Pollutants Emission Reduction, Shandong University, Jinan 250061, Shandong Province, China ansl@sdu.edu.cn, bliyj@sdu.edu.cn, chkh@sdu.edu.cn, dsdzhaojl@sdu.edu.cn, ecml@sdu.edu.cn Keywords: Thermogravimetric analysis; Calcium based organic compound; O2/CO2 atmosphere Abstract.
Meanwhile, both NO and SO2 are concentrated in oxy-fuel combustion and it is expected that once calcium based organic compound is injected into furnace under oxy-fuel combustion atmosphere, reduction efficiency of SO2 and NO should be higher than the one under air combustion atmosphere.
Concrete data of deduced parameters from TG-DTG curves for CP and MCP under O2/N2 and O2/CO2 atmospheres with different O2 concentrations are listed.

Some of samples were cold rolled to obtain a 2.0mm thickness sheet (a total reduction of 85%).
From the pole figure data obtained, the orientation distribution function (ODF) was computed using the formulation of Bunge [2].
Fig. 3 shows φ2=0° section and φ2=45° section of the ODFs of β phase for both the specimens with cold rolling reduction of 85% (a, c) and with recrystallization heat treatment at 1123K for 3.6ks (b, d) in Ti-26Nb-0.5Si (a, b) and Ti-26Nb-1.0Si (c, d) alloys, respectively.

Development of low permeability oil fields has the following characteristics: Actuating pressure increases with the reduction of the permeability, extraction reduces with the reduction of the permeability; it has natural fracture that will open under certain pressure, which aggravates geological heterogeneity; reservoir hydrodynamic connectedness is low, the range of single well controls leaking is small [1].
With the seismic and well logging data, carry out the gradual multi-parameter and united reflect and predict the reservoir distribution and the extent of fractures

The histogram data are divided by the type of substrate on which the 10 A, 10 kV JBS diodes were fabricated and consist of 89 diodes fabricated on six different standard 4H-SiC substrates and 276 diodes fabricated on twelve different low 1C 4H-SiC substrates.
When employed in a high voltage inverter application running at 125°C, the reduction in Qrr from 4.0 µC to 0.8 µC by replacing a 20 A, 10 kV PiN diode with a 20 A, 10 kV JBS diode represents an 80% reduction in the power dissipation incurred by the diode during the turn-off transient, enabling high voltage inverter modules that can operate at frequencies up to 20 kHz.

Lubricating oils with three kinds of nanoparticals were tested in KDE5000E diesel engine. 1 Experiment 1.1 Selection , observation and measurement of nanoparticles Copper nanoparticles as lubricating oils additives have good properties of anti-wear, friction reduction and self-repair function[4] .
properties of lubricating oils containing nanoparticles WCu:WLa2O3-Ce2O3 Tribological properties WCu+ La2O3-Ce2O3 (%) 0.2 0.4 0.6 0.8 1.0 0:1 PB (N) 461 510 510 510 461 Ｄ(mm) 0.521 0.476 0.545 0.457 0.460 μ 0.0972 0.0953 0.0979 0.0893 0.1023 1:1 PB (N) 461 461 490 510 530 Ｄ(mm) 0.425 0.429 0.428 0.436 0.559 μ 0.0963 0.1013 0.0896 0.0934 0.1021 2:1 PB (N) 461 461 490 530 530 Ｄ(mm) 0.633 0.582 0.469 0.423 0.633 μ 0.1039 0.0975 0.0912 0.0875 0.1013 3:1 PB (N) 490 510 530 510 510 Ｄ(mm) 0.575 0.634 0.524 0.448 0.647 μ 0.0993 0.1001 0.1018 0.0973 0.1028 1:2 PB (N) 461 490 490 510 510 Ｄ(mm) 0.451 0.567 0.432 0.439 0.448 μ 0.0997 0.1010 0.0951 0.1047 0.0887 1:3 PB (N) 461 461 490 510 510 Ｄ(mm) 0.608 0.597 0.442 0.453 0.579 μ 0.1015 0.0939 0.0988 0.0993 0.0956 1:0 PB (N) 431 461 461 461 490(461) Ｄ(mm) 0.550 0.470 0.492 0.604 0.470(0.571) (0.571) μ 0.1103 0.0894 0.0915 0.1102 0.0879(0.0998) (0.0998) Note:The data
Cu nanoparticles and La2O3-Ce2O3 nanoparticles may fill in and repair the worn surfaces in the process of friction operation or chemical reaction, thus having the anti-wear and friction-reduction. 2.3 Application of combination of nano-additives in the diesel engine Table3 wear values of main friction pair using 40CD oil with nanoparticles and without nanoparticles(μm) Item Crankshaft Bearing Pad Bore Diamete of Connecting Rod Piston pin Piston Piston Ring（width） upper lower Large end Small end The first The second Oil ring 40CD Oil 23 18 43 56 66 57 3 90 70 70 40CDoil +nanoparticles 2 2 4 5 1 2 0 9 6 8 Wear Value Decrease(%) 91.3 88.9 90.7 91.1 98.5 96.5 100 90 91.4 88.6 Table 3 shows the contrastive test results between 40CD oil containing nanoparticles and 40CD oil, after 300 hours'wear in KDE5000E diesel engine.

The removal of the undesired carbonaceous phases is usually achieved by centrifugation, filtration, oxidation (both in liquid and gas phase) or reduction treatments [7,9-11].
Moreover metallic Fe and Fe3C are also present, as result of the total reduction of the Fe 3+ ions present in the catalyst solid 2θ (deg) 20 30 40 50 60 Diffracted intensity (a.u.)
These results are consistent with literature data concerning similar studies [20-23].

Experimental Design and Data Analysis.
One of the effects of the pretreatment is the removal of wax from the straw: Fig.2 shows that the CH2-stretching bands at approximately 2920 cm-1 were reduced for the pretreated straw sample, signifying a reduction in the amount of the aliphatic fraction of waxes[9].
This was supported by the reduction at 3410 cm-1 related with O-H stretching in hydroxyl groups[12,13].