Prediction model for cyanide soil pollution in artisanal gold mining area by using logistic regression
| Autor: | Joel Podgorski, Hela Karoui, Harinaivo A. Andrianisa, Hamma Yacouba, L.C. Razanamahandry |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Pollution
Hydrology Gold mining 010504 meteorology & atmospheric sciences Gold cyanidation Soil test business.industry media_common.quotation_subject Cyanide 010501 environmental sciences Soil type Logistic regression 01 natural sciences Soil contamination chemistry.chemical_compound Mining engineering chemistry parasitic diseases Environmental science business 0105 earth and related environmental sciences Earth-Surface Processes media_common |
| Zdroj: | CATENA. 162:40-50 |
| ISSN: | 0341-8162 |
| DOI: | 10.1016/j.catena.2017.11.018 |
| Popis: | It has been reported that persistent cyanide pollution occurs in artisanal small-scale gold mining (ASGM)-affected catchment areas in Burkina Faso. In the present study, the logistic regression method was employed to identify the factors that influence the spatial distribution of cyanide pollution as well as to predict the cyanide pollution map risk at catchment level. Soil samples were collected from two ASGM sites in the northern Zougnazagmiline (“North”) site and southern Galgouli (“South”) site parts of Burkina Faso, covering areas of 22 km2 and 20 km2, respectively. Free cyanide concentration in each sample was measured. It was shown that the spatial distribution of cyanide was solely controlled by the soil type in Zougnazagmiline and both the soil type and electric conductivity in Galgouli. On the other hand, the cyanidation zones within the two catchments were the places where the highest risk of cyanide pollution occurs, with probabilities of 0.8 and 1 in Zougnazagmiline and Galgouli, respectively. > 20% of the settled area in the Zougnazagmiline and 5% of that in Galgouli were exposed to cyanide pollution. Logistic regression was able to reliably predict cyanide contamination in areas affected by ASGM. The model could be useful for decision-makers to plan ASGM-site decontamination. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect