Results 361 to 370 of about 4,798,620 (420)

Chemical Control of Struvite Precipitation

Journal of Environmental Engineering, 2003
The control of struvite precipitation was investigated using a range of chemical inhibitors and chelating agents. Initial experiments investigated the mass of struvite that precipitated on jar tester impellers used to mix anaerobically digested sludge liquors. Mixing the liquors resulted in degassing of CO2 increasing the pH from below 7 to above 8. It
Colin Price, John Churchley, Simon A. Parsons, Kath Oldring, J.D. Doyle   +4 more
openaire   +2 more sources

Copper precipitates in silicon: Precipitation, dissolution, and chemical state

Journal of Applied Physics, 2002
The precipitation and dissolution of copper impurities at oxygen precipitates and stacking faults in silicon were studied using thermal budgets commensurate with standard integrated circuit processing. Additionally, in order to develop a better understanding of the dissolution process, we have obtained results on the chemical state of the copper ...
Z. Cai, Scott A. McHugo, Albert C. Thompson, B. Lai, A. Mohammed   +4 more
openaire   +2 more sources

Improved chemical precipitation prepared rapidly NiCo2S4 with high specific capacitance for supercapacitors

Nanotechnology, 2020
In this work, rapid chemical precipitation assisted annealing method is used to prepare flower-like NiCo2S4. And the flower-like structure after polyethylene glycol (PEG) modification yields an excellent specific capacitance (2198.9 F g−1 at 1 A g−1 ...
Jibin Tang, Wanxia Huang, X. Lv, Qiwu Shi   +3 more
semanticscholar   +1 more source

Precipitation in star sapphire III. Chemical effects accompanying precipitation

Philosophical Magazine A, 1980
Abstract Large prismatic dislocation loops, of interstitial character and with 1/3 〈1011〉 Burgers vectors are observed to lie on basal planes in the sapphire matrix around rutile needle precipitates in star sapphire. The loops climb away from the precipitate-matrix interface during ageing, and contain the material that has ‘plated out’ during ...
Arthur H. Heuer, D. S. Phillips, T. E. Mitchell   +2 more
openaire   +2 more sources

Coagulation and sedimentation in chemical precipitation of wastewaters

Water Research, 1983
Abstract The influence of different pollutants on coagulation and sedimentation in chemical treatment for tertiary phosphate removal was investigated in a model system. Phosphorus content and alkalinity resembled that of an effluent from biological treatment. Several pollutants inhibited coagulation and sedimentation.
J. C. Le Bell, C. Axberg, Per Stenius
openaire   +2 more sources

Inhomogeneous precipitation patterns in a chemical wave

Physics Letters A, 1994
Abstract Inhomogeneous BaSO 4 -precipitation patterns are observed in the travelling wave generated in the bistable chlorite-thioureabarium chloride reaction system. At the wave-front SO 2− 4 is formed and detected as BaSO 4 which precipitates inhomogeneously in the region behind the front.
Marcus J. B. Hauser, Reuben H. Simoyi
openaire   +2 more sources

Chemical equilibrium: VIII. Precipitates

Journal of Chemical Education, 1991
The final article in a series (see previous months this year): This article focuses on ionic precipitates in water and how buffered solutions allow easier calculation of solubilities.
openaire   +2 more sources

Chemical Composition of Precipitation at Long Island, NY

Water, Air, and Soil Pollution, 1986
Chemical analyses were performed on 387 sequential precipitation samples, both rain and snow, collected at Brookhaven National Laboratory, Long Island, New York, on 96 different days during the period from October 1983 to June 1985. The collection time for each individual sample was typically 30 min.
Ji Shen, Yin-Nan Lee, Paul J. Klotz
openaire   +2 more sources

Mass transfer with chemical reaction and precipitation

Chemical Engineering Science, 1991
Precipitation involving three steps, namely gas-liquid mass transfer, chemical reaction and crystallization, is analysed in terms of the coupled equations for the film theory of gas-liquid mass transfer with chemical reaction and the mass and population balances of crystallization.
Shun Wachi, Alan G. Jones
openaire   +2 more sources

Innovative preparation of Co@CuFe_2O_4 composite via ball-milling assisted chemical precipitation and annealing for glorious electromagnetic wave absorption

International Journal of Minerals, Metallurgy, and Materials, 2023
Xinglei Feng, Pengfei Yin, Limin Zhang, Xiyuan Sun, J. Wang, Liang Zhao, Changfang Lu, Zhihua Gao, Yongxin Zhan   +8 more
semanticscholar   +1 more source