tailieunhanh - ENVIRONMENTAL RESTORATION of METALSCONTAMINATED SOILS - CHAPTER 14 (end)

Áp dụng trên các vùng đất nông nghiệp là một phương pháp phổ biến cho việc xử lý bùn thải, nó đại diện cho cùng một lúc phân bón chi phí thấp. Tuy nhiên, nếu quá tải các chất ô nhiễm được giới thiệu với các ứng dụng của các cặn chất lượng thấp, điều này thực tế có thể tác động bất lợi | 14 Heavy-Metal Uptake by Agricultural Crops from Sewage-Sludge Treated Soils of the Upper Swiss Rhine Valley and the Effect of Time Catherine Keller Achim Kayser Armin Keller and Rainer Schulin CONTENTS Material and Geographic and Climatic Conditions at the Experimental Experimental Setup and Crop Soil and Plant Results. 278 Heavy Metal Distribution and Migration in Effects of Sewage Sludge Treatments on Soil Properties - Aging Effect. 278 Effects of Sewage Sludge Treatments on Heavy Metal Concentrations and Binding - Aging Migration of Heavy Metals through the Soil Plant Uptake of Heavy Plant Uptake of Heavy Metals and Effects on Crop Spatial Variability of Heavy Metal Contents in Changes Over Plant-Soil Interactions Influence of Soil Factors on Heavy Metal Uptake by Discussion and Impact of the Waste and Sludge Applications on the Impact on Introduction Application on agricultural lands is a popular method for the disposal of sewage sludge as it represents at the same time a low-cost fertilizer. However if excessive loads of pollutants are introduced with the application of low-quality sludges this practice may adversely 273 2001 by CRC Press LLC 274 Environmental Restoration of Metals-Contaminated Soils TABLE Quantities of Heavy Metal Present in Sewage Sludge and Their Transfer to Agriculture in 1989 and 1994 and Average Heavy Metal Concentrations Measured in 1989 in Switzerland Quantity in Sewage Sludge Concentrations in Sewage Sludge Soils Metal t-yr-1 t-yr-1 used in agriculture Weighted Mean g-t-1 DM Limit Values g-t-1 DM Guide Values g-t-1 DM 1989 1994 1994 1989 1992 Mo 52 20 5 Cd