Application of ICP-MS to Species Determination of Pb, As and Cd in Hoggery Waste

作者：Huang Ming li; Li Li na; Wang Juan; Han Wen xuan^*

来源：Spectroscopy and Spectral Analysis, 2009, 29(11): 3141-3143.

DOI：10.3964/j.issn.1000-0593(2009)11-3141-03

• Heavy metal
• Speciation analysis
• Hoggery waste reclamation
• Ecological security

Distribution of heavy metal species in animal wastes needs to be monitored to control the heavy metal pollution during the utilization of wastes. Here, ICP-MS was applied to determine the speciation of Pb, As and Cd in the wastes from two hoggeries in the suburb of Beijing. The air-dried and finely ground samples were digested by HNO(3)-HClO(4), or, sequentially extracted with BCR procedure before content determination of heavy metals. The total concentrations of Pb, As and Cd were 29. 0, 28. 2 and 0. 288 mg . kg(-1) dry weight (DW) in the fresh hoggery wastes respectively, and 19. 7, 28. 2 and 0. 134 mg . kg(-1) DW in the dry-cleaning waste, respectively. The concentrations of the three metals in both fresh and dry-cleaning wastes were all lower than the control standards for urban wastes for agricultural use promulgated by the national govermnent, although As was close to the control value. Over 50% of Pb, As and Cd in the fresh waste were exchangeable/carbonate species, and less than 20% were organic/sulphide. However, species distributions of the heavy metals changed markedly after the process of dry-cleaning. The fraction of highly ecotoxic species (exchangeable/carbonate bound and Fe/Mn oxide bound) in the dry-cleaning waste decreases by 5%-25% for the three metals, indicating reduced risks of heavy metal pollutions when dry-cleaning wastes are applied to farmlands. This study contributes basic data for the resource utilization and ecological security assessment of hoggery wastes from Beijing.

• 出版日期2009-11
• 单位中国农业大学