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In order to overcome the above-mentioned negative effects, the fresh Chinese-fir shavings were extracted in KOH soultion, were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir wood. The results are as follows: (1) The extraction mass arrived at the maximum value when KOH concentration is about 17.5%. The micro/nano particles in Chinese-fir shavings would be...
The remains of zooplankton subfossil and sediment characteristics were examined from a macrophyte dominated shallow lake Wuliangsuhai in Inner Mongolia, China, in order to study past limnological changes. The lake began to switch to eutrophication gradually in the middle 1980s, creating a Transitional Sediment Layer (TSL, about 17 cm depth) that can be visually used to separate sediments derived from...
Three different operation modes were used in vertical flow constructed wetland system treating rural wastewater. The results showed that, low water level operation can provide more oxygen for organic matter and NH4+-N removal, but lack of the anoxic condition for denitrification. Remarkable removals of organic matter, NH4+-N and TN were achieved under the cyclic batch operation. Due to the lack...
The purpose of this study was to choose a fine chemical to efficiently remove ammonia nitrogen from the ammonia water in AS Process, which provides a new available approach to treat coking wastewater. The experiment adopted "Air Stripping and Adsorption" to remove ammonia nitrogen from the ammonia water, and studied the reaction temperature T, pH, the time of stripping t, the dosage of the...
Ammonia nitrogen is a common pollutant in water environment, and the nitrogen removal techniques have been studied extensively. In this work, a new kind of annular reactor was developed and the photocatalysis with suspended TiO2 was used for degradation of ammonia nitrogen. The effects of experimental conditions on the ammonia degradation efficiency and the photocatalytic products in the effluent...
Removal of as(V) and as(III) from water using hydrous cerie oxide, CeO2ldrxH2O (HCO) was investigated under different pH and As loading conditions, using batch equilibrium adsorption and FTIR methods. Adsorption of both As(V) and As(III) anions was virtually independent of pH and up to 100% removal can be achieved in the lower concentration range 0.5 - 5.0 mg L-1 As at sorbent dosage of 1.0 g L-1...
Mouse brain microarray dataset (GDS2702) on embryonic days 14.5 (E14.5), 16.5 (E16.5) and 18.5 (E18.5) was investigated for gene expression patterns of GABA receptors. Gabbr1, Gabra2, Gabrb3 and Gabrg2 were the only four GABA receptor genes expressed at stage E14.5 and E16.5. However, at stage E18.5, four additional genes (Gabra1, Gabra3, Gabrg1 and Gabrg3) were expressed. Gabbr1 had the highest intensity...
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