Yu K N, Yeung Z L L, Lee L Y L, Stokes M J, Kwok R C W
Department of Physics and Materials Science, City University of Hong Kong, Kowloon.
Appl Radiat Isot. 2002 Aug;57(2):279-84. doi: 10.1016/s0969-8043(02)00092-1.
The source profile for soil in Hong Kong is important both for determination of the main air pollutant source in Hong Kong and for assessment of the impact of Asian dust storms on Hong Kong. Soil associated with different rock types have been sampled, and the concentrations of 19 chemical elements, Na, Al, Si, Ti, V, Cr, Mn, Fe, Co, K, Ca, Ni, Cu, Zn, Pb, Rb, Sr, Y and Zr, have been determined using energy dispersive X-ray fluorescence. A profile for the average soil for Hong Kong has been determined by taking average values for the different soil categories. The values for the Hong Kong soil are commensurate with values for rural soil derived by other workers, except that Hong Kong soil has much lower Fe and Ca concentrations. The abundance of Al, Ca and Fe in the average Hong Kong soil are 9.23%, 0.11% and 0.85%. We conclude that Ca provides a good marker element for identifying dust episodes in Hong Kong while Al does not.
香港土壤的源剖面对于确定香港主要空气污染物来源以及评估亚洲沙尘暴对香港的影响都很重要。已采集了与不同岩石类型相关的土壤样本，并使用能量色散X射线荧光法测定了19种化学元素（钠、铝、硅、钛、钒、铬、锰、铁、钴、钾、钙、镍、铜、锌、铅、铷、锶、钇和锆）的浓度。通过取不同土壤类别的平均值确定了香港平均土壤的剖面。香港土壤的值与其他研究人员得出的农村土壤值相当，只是香港土壤中的铁和钙浓度要低得多。香港平均土壤中铝、钙和铁的含量分别为9.23%、0.11%和0.85%。我们得出结论，钙是识别香港沙尘事件的良好指示元素，而铝则不是。
