衍生超临界CO_2萃取土壤样品中的金属离子  

Chelating-supercritical fluid extraction of metal ions from soil

作　　者：张国英[1] 凌建亚[2] 崔兆杰[3] 

机构地区：[1]山东中医药大学,山东济南250014 [2]山东大学微生物技术国家重点实验室,山东济南250100 [3]山东大学环境科学与工程学院,山东济南250100

出　　处：《化工学报》2005年第5期883-884,共2页CIESC Journal

摘　　要：The method of using trifluoro acetyl acetone as chelating agent to extract Cu 2+ ,Hg 2+ ,Pb 2+ ,Zn 2+ ,Cd 2+ ,Cr 3+ from silica gel and soil sample by supercritical CO2 was investigated.The extracts were analyzed with the atomic absorption spectrophotometry method. The experimental results showed that at 20 MPa,60 ℃ and with methanol as modifier, the metal ions mentioned above could be extracted efficiently. The recovery values for the simulated silica gel samples and soil sample were 91.0%—98.2% and 77.8%—93.9%, respectively. This method was proved to be simple, quick and without pollution, which could be applied to the analysis of heavy metal ions in environmental samples.The method of using trifluoro acetyl acetone as chelating agent to extract Cu2+, Hg2+, Pb2+, Zn2+, Cd2+, Cr3+ from silica gel and soil sample by supercritical CO2 was investigated. The extracts were analyzed with the atomic absorption spectrophotometry method. The experimental results showed that at 20 MPa, 60°C and with methanol as modifier, the metal ions mentioned above could be extracted efficiently. The recovery values for the simulated silica gel samples and soil sample were 91.0%-98.2% and 77.8%-93.9%, respectively. This method was proved to be simple, quick and without pollution, which could be applied to the analysis of heavy metal ions in environmental samples.

关 键 词：衍生 超临界流体萃取 三氟乙酰丙酮 金属离子 

分 类 号：X5[环境科学与工程—环境工程]