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Latest Total organic carbon Stories

2008-11-13 12:00:18

O.I. Corporation (NASDAQ: OICO) today announced that a next-generation Total Organic Carbon Analyzer ("TOCA") is scheduled to be launched tomorrow on the Space Shuttle Endeavour to the International Space Station. OI developed the core TOCA technology for this analyzer, which will be a key component of the water recycling system that should allow the Space Station to be fully manned for the first time. Gary Erickson, Research and Development Manager for OI, commented, "The implementation...

2008-09-21 03:00:14

By Ha, Dong Yun Cho, Soon Haing; Kim, Young Kwon; Leung, Solomon W ABSTRACT: This study provides biodegradability of organics in leachate according to their molecular mass distributions (10 KDa). Organics with molecular mass values lower than 0.5 KDa were the predominant species in the raw leachate nitrate, and the aerated lagoon process was very effective in treating these highly biodegradable organics; the Fenton's oxidation process was very effective in treating not-so-biodegradable...

2008-07-02 06:00:47

By Loraine, Gregory A ABSTRACT: In this paper, components of an industrial wastewater that cause operational problems during biological treatment were oxidized by UV light and hydrogen peroxide (UV/H^sub 2^O^sub 2^). Preoxidation of wastewater was shown to remove polyvinylpyrrolidone (PVP) and ethoxylate surfactant and increase overall biodegradability. Several UV intensities and hydrogen peroxide concentrations were tested to find optimal conditions for the complete depolymerization of PVP...

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2008-04-28 14:30:00

A handful of soil is a lot like a banana, strawberry and apple smoothie: Blended all together, it is hard to tell what's in there, especially if you have never tasted the fruits before.But when you look at soil's organic carbon closely, it has an incredible variety of known compounds. And looking closely is exactly what Cornell researchers have done for the first time -- at a scale of 50 nanometers (1 nanometer equals the width of three silicon atoms). Until now, handfuls of soil humus (or...

2008-03-11 15:21:20

A recent study at the University of Illinois created a bit of a mystery for soil scientist Michelle Wander "“ increased carbon dioxide in the atmosphere was expected to increase plant growth, increase plant biomass and ultimately beef up the organic matter in the soil -- but it didn't. What researchers found instead was that organic matter decay increased along with residue inputs when carbon dioxide levels were increased and they think the accelerated decay was due to increased...

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2008-02-26 11:55:00

The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals, according to a study reported in the Proceedings of the National Academy of Sciences online Early Edition during the week of February 25 - 29.Today, we take oxygen for granted. But the atmosphere had almost no oxygen until 2.5 billion years ago, and it was not until about 600 million years ago when the...

2008-02-24 03:00:33

By Garg, Anurag Mishra, Indra M; Chand, Shri ABSTRACT: Wet-air oxidation of diluted black liquor (chemical oxygen demand [COD] approximately 3250 to 14 500 mg/L) was performed at mild operating conditions (temperature = 388 to 423 K and total pressure = 0.6 MPa) in the presence of heterogeneous 60% copper oxide (CuO)/ 40% cerium oxide (CeO^sub 2^) catalyst. Maximum COD reduction of 77.3% was obtained at 423 K at pH 3.0, which was marginally higher than that obtained at 413 K temperature...

2007-11-15 06:00:37

By Killian, Paul F Bruell, Clifford J; Liang, Chenju; Marley, Michael C The persulfate anion (S^sub 2^O^sup 2-^^sub 8^) is a strong oxidant with a redox potential of 2.01 V. However, when mixed with iron (II), it is capable of forming the sulfate radical (SO^sup - ^^sub 4^sup .^^) that has an even higher redox potential (E[degrees] = 2.6 V). In these studies the sulfate radical was investigated to determine if it was a feasible oxidant for the destruction of BTEX and PAH compounds found in...

2007-10-23 06:00:46

By Ni, Jinren Sun, Liyiing; Sun, Weiling ABSTRACT: This paper presents a modification of chemical oxygen demand (COD) monitoring giving a better indication of the pollution level compared with the conventional COD method for rivers with a high content of sediments. The correlation between the sediment organic carbon and COD was investigated using sediments sampled in the middle Yellow River, China. Partitioning of the sediment organic carbon between the water and sediment phases was also...

2007-09-11 06:00:46

By Chow, Judith C Watson, John G; Chen, L-W Antony; Chang, M C Oliver; Et al ABSTRACT Thermally derived carbon fractions including organic carbon (OC) and elemental carbon (EC) have been reported for the U.S. Interagency Monitoring of PROtected Visual Environments (IMPROVE) network since 1987 and have been found useful in source apportionment studies and to evaluate quartz-fiber filter adsorption of organic vapors. The IMPROVE_A temperature protocol defines temperature plateaus for...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'