Search results

Since the piedmont plain area of the basin, along the flow direction it can be divided into a diving three water chemistry belt: alluvial fan above the overflow , dive is the bicarbonate-type water of the degree of mineralization is less than 1g / L ; overflow with to the upper area of alluvial plain , dive is the sulfate-type water of the mineralization degree of 1～3g / L ; alluvial plain to lacustrine plains, dive has been salted, the salinity is in the 3～10g / L even in 10g / L above, is blong to the chloride-type water.
Water chemistry type transits from SO4 2type water and SO 4.CL type to CL water-based, rich water is poor and not taken advantage of .
(2)Improve the utilization efficiency rate of non-conventional water resourse It is the macroeconomic measures to adjust the agricultural planting structure and develop water-saving irrigation for the use of water in agriculture rationallly, improvision of water use efficiency and the sustainable development of agriculture.

Effect of Solvent polarity properties on the Selectivity and Activity for 3,4-Dichloronitrobenzene Hydrogenation over Pd/C Catalyst Chunshan Lu*, Jinghui Lu, Lei Ma, Qunfeng Zhang, and Xiaonian Li** Industrial Catalysis Institute of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310032, P.R.
Introduction Aromatic haloamines are important intermediates in the chemistry of organic fine chemicals, such as herbicides, dyes, drugs, pesticides and so on [1-2].
The XRD characteristic diffraction peaks of Pd/C catalyst appeared at 2 = 40o, 47o and 68o corresponding to (111), (200) and (220) crystal facet respectively, which indicates that the catalyst possesses face-centered cubic crystal structure.

ZSM-5 was usually used as cracking catalyst in petroleum refinery process because of high acidity and special pore structure.
The authors would like to thank the Chemical Analytic Lab in the Chemistry Department of SDSU for the chemical (GC/MS) analysis of the bio-oil samples.
C., Handbook of Chemistry and Physics, 56th Edition.

The latter may prove important for "green chemistry."
Like homopolymerization, the self-propagating front reaction is accompanied by periodic evolution of gas (foaming) with the formation of banded structures on the surface of the sample.
(Abstracts of Reports of the XVI Chugaev Meeting on Chemistry of Complexes) (Krasnoyarsk, Pt. 1, p.189, 1987) [7] A.D.

Work is underway to analyze the structure of the biofilm.
Gangloff, R.P., “Rate-Limiting Processes in Environmental Fatigue Crack Propagation in 7000-series Aluminum Alloys”, in Chemistry and Electrochemistry of Corrosion and Stress Corrosion Cracking, R.H.
Hooper, Solution Chemistry Modification within Corrosion-Fatigue Cracks, in Corrosion-Fatigue Technology, ASTM STP 642, H.L.

Comparative study on adsorption of Pb(II) ions by alginate beads and mangrove-alginate composite beads Siti Nur Aeisyah Abas1, a *, Mohd Halim Shah Ismail1, b , Shamsul Izhar Siajam1, c , Mohd Lias Kamal2, d 1 Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia 2 Department of Chemistry, Faculty of Applies Science, Universiti Teknologi MARA (Perlis) 02600 Arau, Perlis, Malaysia aaeisyah.abas@hotmail.com, bmshalim@upm.edu.my, cshamizar@eng.upm.edu.my, dmohdlias@perlis.uitm.edu.my Keywords: mangrove; composite bead; lead; alginate bead; isotherm; adsorption Abstract.
Tannin in mangrove bark showed high performance in removing heavy metal ion such as cobalt, chromium and uranium due to the presence of phenolic hydroxyl groups in their structures [5].
Vermeulen, Industrial and Engineering Chemistry Fundamentals. 5(1966) 212-223

Study on the Adsorption Behavior of Acid Dyes on Collagen Fiber Xuechuan Wanga, Qiaoqiao Bub, Taotao Qiangc and Min Luod Key Laboratory of Auxiliary Chemistry & Technology for Light Chemical Industry, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, China awangxc@sust.edu.cn, bbuqiaoqiao@163.com, cqiangtt515@163.com, dlan.tuler@163.com Keywords: Collagen fiber (CF), Adsorption behavior, Isotherms, Kinetics.
But when the pH was below to 2, the original mesh structure of CF may be damaged because of the aggravate function of hydrolysis, leading to a lower absorption capacity.
Chen, Adsorption Equilibrium and Kinetic of Dyes onto Aminated Chitosan Microspheres, Guangzhou Chemistry. 4 (2004) 30-33

Phase evolution based on the intensities of the XRD plots and BET surface area analysis indicates three stages of crystallization: below 800°C, between 800°C and ~1100°C, and above 1100°C where reflections of La2Zr2O7 with pyrochlore structure are increased with further heating.
Introduction Lanthanum zirconate, La2Zr2O7 has gained widespread research attention due to its remarkable properties like very high thermal stability, low sintering, low thermal conductivity, not oxygen transparent and remarkably stable against heavy ion induced amorphization.[1-3] It has a cubic pyrochlore structure which allows operation temperature up to as high as 2200°C before any phase transformation occurs [2,4].
Solid-state reaction [10,11] and other wet-chemistry-based routes, which include co-precipitation [12], sol-gel process [13,14], hydrazine [15] and citrate methods [12] have been conducted to prepare a thermally stable compound.
Majority of the monoclinic ZrO2 peaks are still visible although at much lower intensity, since grinding could not affect it greatly due to its structure and hardness.
After sintering at 1500°C, the single phase has evolved, with all its reflections matching that of La2Zr2O7 with pyrochlore structure [18].

The fumed silica samples had significantly less pronounced peaks corresponding to the nitrate groups, consistent with the more porous structure and the less hygroscopic aspect.
An alternative process is the sol-gel route, a chemistry-based synthesis route where precursors form an inorganic network at room temperature and, through aging, form a gel [2].
The XRD patterns (Fig. 1a) showed amorphous pattern, characteristic of glass structures, after heat treatments under both temperatures.
Mikuli, “Experimental (FT-IR and FT-RS) and theoretical (DFT) studies of molecular structure and internal modes of [Mn(NH3)6](NO3)2,” Spectrochim.
Yamamuro, “Dependence of apatite formation on silica gel on its structure: effect of heat treatment,” J.

To control the structure of the incompletely oxidized SiOx based composite powders, the as-synthesized SiOx based composite powders were heat-treated under 5 % H2 and 95 % Ar mixed gas atmosphere at a temperature of 1000 °C to 1400 °C for 3h.
The crystalline structures of the samples were characterized by an X-ray diffraction (XRD, Rigaku ULTIMA IV with Cu Ka radiation) and high-resolution transmission electronic microscopy (HR-TEM, JEOL JEM-2100F).
Although the atomic structure of SiOx could not be unambiguously proved until now and is a subject of controversy, it is speculated that the SiOx based composite powders synthesized by FHS method and post heat-treatment contains a disproportionate mixture of two separated phases Si and SiO2 in amorphous SiOx matrix according to the random-mixture model [14].
Chemical status of SiOx structure characterization of silicon sub-oxide changed to SiO2 with increasing up to high temperature (>1200 °C).
Fateev, High Energy Chemistry Vol. 44 (2010), p. 58 [13] K.H.