3篇
您的检索式：作者名="V.W.D.CHUI"
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| 1 | Lead Concentration in Hong Kong Roadside Dust after Reduction of Lead Level in Petrol显示文摘Samples of roadside dust were collected from 30 sites in Hong Kong.The total concentrationsof 10 metals in the samples were analyzed,and the correlation coefficients among the metalcontents and the annual average daily traffic(AADT)in 1986 were determined.Pb was foundto have a significant correlation(P<0.01)with AADT.No correlation was found between Al,Ba,Cd,Cr,Cu,Fe,Mn,Ni,and Zn with respect to AADT.A general decrease in the level of Pbin roadside dust in the past few years has been observed since the reduction in the level of leadin petrol.1989 Academic Press,Inc. | G.Y.S.CHAN V.W.D.CHUI M.H.WONG | 1989 | Biomedical and Environmental Sciences1989，2，2： | 4 |
| 2 | Removal of Lead from Aqueous Solution by Acinetobacter calcoaceticus显示文摘A bacterial strain tolerant to the presence of 400 ppm lead was isolated from digested sewage sludge. The organism was identified as Acinetobacter calcoaceticus var: anitraus (98% confidence). Both viable and formalin-inactivated bacterial cells could remove Pb from an aqueous solution. The Pb-binding ability of inactivated cells was compared with that of a commercial ion-exchange resin, Amberlite IR-I20. The metal-binding ability of A. calcoaceticus followed the sequence Pb≥Cu≥Cr≥ (Cd, Ni, and Zn)≥Co. The ability of the inactivated cells to remove Pb was pH sensitive, and the adsorption process was slightly affected at high temperature (70℃). The adsorption and desorption process worked equally well with A. calcoaceticus embedded in a polyacrylamide gel matrix. (c)1990 Academic Press, Inc. | N.K.MAK Y.K.MOK V.W.D.CHUI M.H.WONG | 1990 | Biomedical and Environmental Sciences1990，3，2： | 0 |
| 3 | Residues of Polychlorinated Biphenyls (PCBs) in Fish, Water and Sediment from Shing Mun River显示文摘The level and pattern of contamination by polychlorinated biphenyls (PCBs) were investigated in tilapia, Oreochromis mossambicus (Peters), sediment, and water from the Shing Mun River. The range of total PCBs was 12.9 ng/g to 181.6 ng/g wet weight in tilapia, 12.7 ng/g to 46.0 ng/g freeze-dried weight in sediment, and 3.8 ng/L to 13.6 ng/L in water. The effect of biomagnification was also observed, PCB concentrations increased from water to sediment to tilapia. PCB congeners occurred in such a way that lower chlorinated PCBs comprised a higher fraction of the total PCBs in water, sediment, and tilapia muscle, whereas higher chlorinated PCBs were more commonly found only in tilapia. | V.W.D.CHUI T.C.CHAN S.Y.LAM-LEUNG | 1991 | Biomedical and Environmental Sciences1991，4，4： | 0 |
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