中国环境监测
中國環境鑑測
중국배경감측
Environmental Monitoring in China
2015年
5期
93-97
,共5页
TCLP%农田%重金属%风险评价
TCLP%農田%重金屬%風險評價
TCLP%농전%중금속%풍험평개
Toxicity Characteristic Leaching Procedure%cultivated field%heavy metal%risk assessment
TCLP法是用缓冲剂提取重金属的一种方法,该法评价重金属生态风险在美国已开展多年。利用TCLP法对天津市某农田土壤重金属进行生态风险评价,结果表明,在采集的23个样品中有效态铜、铅、锌、镉的含量范围为1.13~5.26、2.11~5.22、2.60~30.6、1.09×10-3~77.9×10-3 mg/kg,普遍低于铜、铅、锌、镉在土壤中的总量(22.1~66.8、21.2~50.6、56.8~445、0.04~0.20 mg/kg)。镉的TCLP有效态与总量的差别最大。锌、铅存在轻微污染,污染率分别为21.7％、4.3％。
TCLP法是用緩遲劑提取重金屬的一種方法,該法評價重金屬生態風險在美國已開展多年。利用TCLP法對天津市某農田土壤重金屬進行生態風險評價,結果錶明,在採集的23箇樣品中有效態銅、鉛、鋅、鎘的含量範圍為1.13~5.26、2.11~5.22、2.60~30.6、1.09×10-3~77.9×10-3 mg/kg,普遍低于銅、鉛、鋅、鎘在土壤中的總量(22.1~66.8、21.2~50.6、56.8~445、0.04~0.20 mg/kg)。鎘的TCLP有效態與總量的差彆最大。鋅、鉛存在輕微汙染,汙染率分彆為21.7％、4.3％。
TCLP법시용완충제제취중금속적일충방법,해법평개중금속생태풍험재미국이개전다년。이용TCLP법대천진시모농전토양중금속진행생태풍험평개,결과표명,재채집적23개양품중유효태동、연、자、력적함량범위위1.13~5.26、2.11~5.22、2.60~30.6、1.09×10-3~77.9×10-3 mg/kg,보편저우동、연、자、력재토양중적총량(22.1~66.8、21.2~50.6、56.8~445、0.04~0.20 mg/kg)。력적TCLP유효태여총량적차별최대。자、연존재경미오염,오염솔분별위21.7％、4.3％。
Abstact The method toxicity characteristic leaching procedure is using buffer solution to extract heavy metal from soil. TCLP has been used ecological risk assessment for many years. Ecological risk assessment of heavy metals in farmland in Tianjin by toxicity characteristic leaching procedure. The results show that of the 23 samples collected whole amount Cu, Pb, Zn, Cd determination of the range of 22. 1-66. 8,21. 2-50. 6,56. 8-445,0. 04-0. 20 mg/kg. Available Cu,Pb,Zn,Cd content in the range 1. 13-5. 26,2. 11-5. 22,2. 60 -30. 6 mg/kg,1. 09 × 10 -3 -77. 9 × 10 -3 mg/kg,where the amount of available Cd to total Cd accounted for the largest proportion. Single pollution index and comprehensive pollution index assessment similarly. Environmental quality evaluation results show that only minor Zn pollution,was 8. 7%. Using the TCLP method of ecological risk assessment indicates,Zn and Pb there is a slight pollution,contamination rates were 21. 7%,4. 3%.
