Multivariate statistical analysis of heavy metal concentration in soils of Yelagiri Hills, Tamilnadu, India--spectroscopical approach.
Anthropogenic activities increase the accumulation of heavy metals in the soil environment. Soil pollution significantly reduces environmental quality and affects the human health. In the present study soil samples were collected at different locations of Yelagiri Hills, Tamilnadu, India for heavy metal analysis. The samples were analyzed for twelve selected heavy metals (Mg, Al, K, Ca, Ti, Fe, V, Cr, Mn, Co, Ni and Zn) using energy dispersive X-ray fluorescence (EDXRF) spectroscopy. Heavy metals concentration in soil were investigated using enrichment factor (EF), geo-accumulation index (Igeo), contamination factor (CF) and pollution load index (PLI) to determine metal accumulation, distribution and its pollution status. Heavy metal toxicity risk was assessed using soil quality guidelines (SQGs) given by target and intervention values of Dutch soil standards. The concentration of Ni, Co, Zn, Cr, Mn, Fe, Ti, K, Al, Mg were mainly controlled by natural sources. Multivariate statistical methods such as correlation matrix, principal component analysis and cluster analysis were applied for the identification of heavy metal sources (anthropogenic/natural origin). Geo-statistical methods such as kirging identified hot spots of metal contamination in road areas influenced mainly by presence of natural rocks.
['Chandrasekaran|A|A|', 'Ravisankar|R|R|', 'Harikrishnan|N|N|', 'Satapathy|K K|KK|', 'Prasad|M V R|MV|', 'Kanagasabapathy|K V|KV|']
D016000:Cluster Analysis D004784:Environmental Monitoring D000075322:Heavy Metal Poisoning D006801:Humans D007194:India D019216:Metals, Heavy D015999:Multivariate Analysis D011041:Poisoning D025341:Principal Component Analysis D012987:Soil D012989:Soil Pollutants D062206:Spatial Analysis D013052:Spectrometry, X-Ray Emission
Statistical analysis Heavy metals EDXRF Enrichment factor Geo-accumulation index Spatial distribution