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Simultaneous removal of nitrate and heavy metals by iron metal*
HAO Zhi-wei, XU Xin-hua, JIN Jian, HE Ping, LIU Yong, WANG Da-hui
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 1-.
https://doi.org/10.1631/jzus.2005.B0307
Great attention should be paid now to simultaneously removing common pollutants, especially inorganic pollutants such as nitrate and heavy metals, as individual removal has been investigated extensively. Removing common pollutants simultaneously by iron metal is a very effective alternative method. Near neutral pH, heavy metals, such as copper and nickel, can be removed rapidly by iron metal, while nitrate removal very much slower than that of copper and nickel, and copper can accelerate nitrate removal when both are removed simultaneously. Even a little amount of copper can enhance nitrate removal efficiently. Different mechanisms of these contaminants removal by iron metal were also discussed.
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Toxicity of cadmium to soil microbial biomass and its activity: Effect of incubation time on Cd ecological dose in a paddy soil*
LIAO Min, LUO Yun-kuo, ZHAO Xiao-min, Huang Chang-yong
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 4-.
https://doi.org/10.1631/jzus.2005.B0324
Cadmium (Cd) is ubiquitous in the human environment and has toxic effect on soil microbial biomass or its activity, including microbial biomass carbon (Cmic), dehydrogenase activity (DHA) and basal respiration (BR), etc., Cmic, DHA, BR were used
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Multi-stage ponds-wetlands ecosystem for effective wastewater treatment*
PENG Jian-feng, WANG Bao-zhen, WANG Lin
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 7-.
https://doi.org/10.1631/jzus.2005.B0346
The performance of the Dongying multi-stage ponds-wetlands ecosystem was investigated in this work. Study of the removal of different pollutants (BOD5, COD, SS, TP, TN, NH3-N, etc.) in different temperature seasons and different units in this sy
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Synthesis of acetals and ketals catalyzed by tungstosilicic acid supported on active carbon*
YANG Shui-jin, DU Xin-xian, HE Lan, SUN Ju-tang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 12-.
https://doi.org/10.1631/jzus.2005.B0373
Catalytic activity of activated carbon supported tungstosilicic acid in synthesizing 2-methyl-2-ethoxycarbonylmethyl- 1,3-dioxolane, 2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane, cyclohexanone ethylene ketal, cyclohexanone 1,2-propa- nediol
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Effect of seedling age and water depth on morphological and physiological aspects of transplanted rice under high temperature
KHAKWANI Abdul Aziz, SHIRAISHI Masaaki, ZUBAIR Muhammad, BALOCH Mohammad Safdar, NAVEED Khalid, AWAN Inayatullah
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 15-.
https://doi.org/10.1631/jzus.2005.B0389
To study the effect of high temperature, rice seedlings 20, 30, 40 and 50 d were kept at 5, 10, 15 and 20 cm water depth in a water pool. Meteorological findings indicated that water temperature varied up to 10 cm but became stable below this depth. Deep water inflicted higher tiller mortality, minimal increase in dry weight of aerial parts and leaf area, decrease in root length, and decrease in root dry weight especially at 20 cm water depth and produced an unbalanced T/R ratio (top versus root dry weight). However, deep water tended to increase plant length. These parameters, however, excel in shallow water. Older seedlings, with the exception of root dry weight, could not perform well compared to young seedlings in all physiological and morphological aspects. The study revealed that seedlings, particularly young ones, stand well in shallow water and can cope with high temperature.
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21 articles
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