Concentration Estimation of Heavy Metal Cr in Soilsfrom Jiaojia-Type Gold Mining Areas Using Reflectance Spectroscopy
WANG Fei1, WANG Ji-ning2, CAO Wen-tao1, KANG Ri-fei1, CAO Jian-fei1, WU Quan-yuan1*
1. College of Geography and Environment, Shandong Normal University, Ji’nan 250014, China
2. Geological Environmental Monitoring Station of Shandong Province, Ji’nan 250014, China
Abstract：Heavy metal contamination has been rising markedly in mining area and a rapid and accurate assessment technique is of utmost importance. In this study, visible and near-infrared spectra combined with partial least square regression (PLSR) are developed to achieve the rapid monitoring of Cr in soilsfrom Jiaojia-type gold mines. A total of eighty five soil samples were collected to measure the spectra on the spot, thirty five of which were used for chemical analysis. PLSR models were established using primitive spectra (R) and first derivative (RD1), second derivative (RD2) and continuum removal (CR) data to find the most suitable calibration. The best predictive model that used RD1 spectra was applied to determine the contents of Cr in the untested samples and the spatial distribution map was created by universal kriging interpolation. Results illustrated that the major abundance of Cr was concentrated in the range of 36～48 mg·kg-1, with the highest value being 71.8 mg·kg-1 and lowest being 20.9 mg·kg-1. Furthermore, elevation and the orefield showed prominent impacts on the content values of Cr. Generally plain and the areas closed to gold mines tend to have higher concentrations of Cr.
Key words：Goldmining area; Reflectance spectroscopy; Cr; Predictive model; Spatial distribution
基金资助: National Natural Science Foundation of China(41371395); Shandong Province Department of Land and Resources Project([2012]110, [2013]141)
通讯作者:
吴泉源
E-mail: wqy6420582@163.com
作者简介: WANG Fei，(1991—), Master student, specialized in the monitoring of heavy metals in soils e-mail:
fei1226h@126.com
引用本文:
王 菲，王集宁，曹文涛，康日斐，曹见飞，吴泉源. 山东省焦家式金矿区土壤重金属铬高光谱监测研究[J]. 光谱学与光谱分析, 2017, 37(05): 1649-1655.
WANG Fei, WANG Ji-ning, CAO Wen-tao, KANG Ri-fei, CAO Jian-fei, WU Quan-yuan. Concentration Estimation of Heavy Metal Cr in Soilsfrom Jiaojia-Type Gold Mining Areas Using Reflectance Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(05): 1649-1655.
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