摘要
以山东省莱州市焦家金成矿带为研究区,采集85份土样进行光谱野外实测,对其中35份土样的铬浓度进行测定分析。利用原始光谱及其一阶微分、二阶微分变换的光谱指标,采用主成分回归法、多元逐步回归法建模,探索光谱指标与铬浓度的相关关系,选取最优模型。利用最优模型反演获取其余50个土样的铬浓度,通过地理插值得到研究区铬浓度的空间分布。结果表明,研究区内土壤铬浓度与金矿分布状况密切相关,铬质量浓度最高值为71.8mg/kg,未超过《土壤环境质量标准》(GB 15618—1995)的二级标准,研究区内不存在铬污染问题。
In this paper,the Jincheng mines located in Jiaojia of Laizhou City,Shandong province was selected as research area,85 soil samples in research area were collected [or field spectrum measuring,and 35 samples of them were used to determine concentrations of Cr. The principal component regression models and stepwise regression models were established respectively using primitive reflectance spectra and transformed data including first derivative and second derivative data to find out the relationship between the spectra data and Cr concentration, and the most suitable model was chosen for retrieving Cr content of other 50 soil samples. Base on which, the spatial distribution map of Cr in study area was made by geographical interpolation. As a result,the concentration of Cr was relative high- er around mining areas and declines outwards. The highest Cr value was 71.8 mg/kg,which conformed to the second level of national ＂Soil environment quality standard＂ （GB 15618-1995）, so there was no Cr contamination existed in study area.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2016年第2期13-18,共6页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.41371395)
山东省龙口市龙口矿区及周边海岸带环境地质调查与评价项目(鲁勘字(2012)110号)
山东省焦家金成矿带及周边矿区环境地质调查项目(鲁勘字(2013)141号)
关键词
金矿
野外实测光谱
回归分析
重金属
铬监测
gold mining
field measured spectra
regression analysis
heavy metal
Cr monitoring
