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Zhao B.,South China Agricultural University | Zhao B.,Regular Higher Education Institutions | Dai W.,South China Agricultural University | Zhang J.,South China Agricultural University | And 3 more authors.
Advance Journal of Food Science and Technology | Year: 2012

Golden apple snail was a harmful invasive gastropod in Asian wetlands. In order to clarify the effect of Pomacea canaliculata on macrophytes in paddy fields, feeding preference and nutrients utilization of snail were studied. Feeding preference of snail was Alternanthera philoxenoides>Monochoria vaginalis>Oryza sativa L. Snail showed a higher approximate digestion coefficient on Oryza sativa L. than that on Monochoria vaginalis. Nitrogen utilization coefficient of snail on Alternanthera philoxenoides was significantly higher than that on Oryza sativa L. Snail exhibited a higher calcium utilization coefficient on Alternanthera philoxenoides and Monochoria vaginalis than that on Oryza sativa L. Oryza sativa L. was not preferred among three plants under the same available and exposure condition. © Maxwell Scientific Organization, 2012.

Wang Y.,South China University of Technology | Wang Y.,Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters | Wu C.,South China University of Technology | Wu C.,Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters | And 7 more authors.
Fresenius Environmental Bulletin | Year: 2015

The removal of dissolved organic matter (DOM) from the Pearl River raw water was investigated by enhanced coagulation process with diatomite in this study. The effect of coagulant category, additional doses of diatomite and pH on coagulation efficiency was investigated and DOM was fractioned and characterized by ultra-filtration and resin adsorption techniques. The results showed that enhanced coagulation can improve the removal of turbidity and DOM. The smaller molecules (< 4 kDa) and larger ones (> 30 kDa) were found to be the dominant fractions. The hydrophobic acids (HoA) and the hydrophilic matter (HiM) were more abundant than hydrophobic base (HoB), hydrophobic neutral (HoN) and weak hydrophobic acid (WHoA). The results showed that the enhanced coagulation process could provide certain reduction for each molecular weight (MW) organics, WHoA, HoN and HoA fractions. It can be concluded that the MW distribution and component fraction of DOM were related to the enhanced coagulation performance. © by PSP.

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