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Evaluation of eco-friendly coagulant from <i>Trigonella foenum-graecum</i>seed

Advances in Biological Chemistry 2012年第1期2卷 58-63页

作者： Chitteti Ramamurthy Malige Uma Maheswari Natarajan Selvaganabathy Muthuvel Suresh Kumar Venugopal Sujatha Chinnasamy Thirunavukkarasu Centre for Advanced Studies in Bioinformatics School of Life Sciences Pondicherry University Puducherry India Department of Biochemistry and Molecular Biology School of Life Sciences Pondicherry University Puducherry India Department of Chemistry Periyar University Salem India

The ability of seed extracts of Trigonella foenum-graecum (T. foenum-graecum) and Cuminum cyminum (C. cyminum) to act as natural coagulants was tested using natural turbid water. Seed extracts were prepared using distilled water and NaCl (0.5 M and 1.0 M) solution. Only 1.0 M NaCl extract of T. foenum-graecum had coagulation capability and did not depend on pH values. Further it showed that natural coagulant obtained from T. foenum-graecum is temperature (upto 100?C) and pH stable (pH 4.0 - 10.0). Extract of C. cyminum had very minimal (16 ± 2) coagulation property. The seed extract of T. foenum-graecum showed about 80% coagulation properties, where as the best known natural coagulants such as Strychnos potatorum and Moringa oleifera, and chemical coagulant such as Al2(SO4)3 showed around 90%, 65% and 95% respectively, which are used as standards for the present study. When compared with pond water, T. foenum-graecum extract treated water shows decrease in alkalinity, turbidity, KMnO4 demand and total coli-form. This study reveals that seed extract of T. foenum-graecum can be used as natural water coagulant.

关键词： Natural Coagulants Water purifier T. foenum-graecum Fenugreek

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Gas Purification and Quality Control of the End Gas Product

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Journal of Materials Science and Chemical Engineering 2017年第8期5卷 44-58页

作者： Konstantin Chuntonov Alexey O. Ivanov Boris Verbitsky Victor L. Kozhevnikov Mechemlab Ltd. Nesher Israel Institute of Mathematics and Computer Sciences Ural Federal University Yekaterinburg Russia Institute of Solid State Chemistry Russian Academy of Sciences Yekaterinburg Russia

One of the main problems in the flow-through gas purification technologies is related with continuous control of the outlet gas purity. The information concerning purity of the produced gas is on high demand, e.g., for processing systems integrated with gas purifiers. The positive solution of this problem has become possible only now due to the appearance of reactive getters (reactants) that serve as highly efficient sinks for gas impurities and our sorption model of the processes, which take place in gas purifiers with these reactants. According to the given model the appearance of a single valued functional connection between the purity of the gas product and the duration of the treatment of the gas flow by the sorbing powder is typical for any system Me -Y, where Me is a powder reactant and Y is an impurity gas. This strict correlation provides the mathematical justification to a simple method of determining the concentration of the impurity in the gas flow at the exit from the gas purifier. This method comes down to measuring of the quantity of the purified gas by a gas flow meter, the readings of which are graduated in the units of gas concentration.

关键词： Gas purifier Reactants Sorption Model Quality Control Purity Indicator

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