成县石灰性土壤金属镉背景值调查
Investigation on Cadmium Background Value in Calcareous Soil in Cheng County
杨兴宏1
作者信息
- 1. 陇南师范高等专科学校，甘肃陇南742500
- 折叠
摘要
[目的]调查成县石灰性土壤重金属镉含量的背景值,为石灰性土壤镉污染评价提供参考。[方法]采集成县30个地块,每个地块采集0~20和20~40 cm土层土样,采用DTPA浸提–原子吸收分光光度法测定土壤中可给态镉含量。[结果]0~20 cm土层土壤的可给态镉含量平均为2.48 mg/kg,变动范围2.23~2.73 mg/kg(95%可靠度)或者2.15~2.81 mg/kg(99%可靠度)；20~40 cm土层土壤的可给态镉含量平均为2.43 mg/kg,变动范围是2.23~2.63 mg/kg(95%可靠度),或者2.16~2.70 mg/kg(99%可靠度)。[结论]0~20 cm土层土壤镉含量污染的临界值为2.81 mg/kg,20~40 cm土层土壤镉含量污染的临界值为2.70 mg/kg。
Abstract
Objective] To investigate the cadmium background value in calcareous soil in Cheng County, and to provide references for the cadmium pollution evaluation in calcareous soil. [ Method] A total of 30 land plots were selected from Cheng County. Samples at 0-20 and 20-40 cm soil layers were collected from each plot. The available cadmium content in soil was detected by DTPA extraction - atomic absorp-tion spectrophotometry. [Result] The average content of available cadmium in 0-20 cm soil layer was 2. 48 mg/kg;the variation range was 2. 23-2. 73 mg/kg (95% reliability) or 2. 15-2. 81 mg/kg (99% reliability). The average content of available cadmium in 20-40 cm soil layer was 2. 43 mg/kg, the variation range was 2. 23-2. 63 mg/kg(95% reliability) or 2. 16-2. 70 mg/kg (99% reliability). [Conclusion] Critical value of cadmium content pollution in 0-20 and 20-40 cm soil layers are 2. 81 and 2. 70 mg/kg, respectively.
关键词
石灰性土壤/镉污染/背景值/临界值/成县Key words
Calcareous soil/Cadmium pollution/Background value/Critical value/Cheng County引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据