mining environment
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2021 ◽  
Author(s):  
Iyioluwa Busuyi Raji ◽  
Emile Hoffmann ◽  
Ewald Erasmus ◽  
Adeline Ngie ◽  
Frank Winde

Abstract Uranium, U, as a toxic element has detrimental radiological and chemical impacts on human health when ingested at elevated concentration in water. The establishment of gold mining operations upstream to the Rietspruit is assumed to be a source of uranium into this water body which flows through residential and agricultural land. Water samples from the stream were collected and analysed using inductively coupled plasma mass spectrometry to determine the concentration of U. Uranium concentrations above South African regulatory limit were recorded in the stream water which is used for domestic, agricultural and religious activities as observed during field visits. Results from calculations showed that the maximum annual effective dose within this mining environment was above 1 mSv/year for all age groups. Furthermore, the probability of radiological risk is lower than the chemical risk which is due to the ingestion of U in the Rietspruit water. The chemical risk analysis showed that within 24 km of this mining environment, stream users are in danger of U chemical toxins therefore, it is important to educate the stream users about their health risk of U and recommend adequate interventions by relevant government agencies to this effect.


2021 ◽  
Vol 10 (1) ◽  
pp. 1-7
Author(s):  
L.U Mgbeahuruike ◽  
E.I Emereibeole ◽  
F.U Nwobodo ◽  
C.N Uyo ◽  
J.C Anyanwu ◽  
...  

Author(s):  
Tianxin Li ◽  
Fang Zhang ◽  
Minjie Zhang

By simulating the mining environment, the potential of the selected mixed bacteria (Pseudomonas putida, Lysinibacillus xylanilyticus, Lysinibacillus macroides, Bacillus simplex, Brevibacillus agri) to control Fe and Mn pollutants in mining environment were explored. The results showed that the selected bacteria could inhibit the release of Fe and Mn from ore into the aquifer, and the inhibition effect on Mn was significantly stronger than that on Fe. At the same time, these processes also have a certain degree of impact on the external environment, including the gradual increase of pH, the gradual decrease of oxidation-reduction potential, and the decrease of dissolved oxygen concentration. The changes of these external environmental factors will once again directly affect the degradation and immobilization of Fe and Mn. The selected mixed bacteria can also enhance the adsorption of free Fe and Mn, improve the adsorption efficiency and capacity of Fe and Mn, and slow down the desorption of Fe and Mn to water.


2021 ◽  
pp. 0952-099
Author(s):  
CM Abraham ◽  
K Essien ◽  
EU Umoh ◽  
EC Umoh ◽  
LE Ehiremem ◽  
...  

The study examined Sand Dredged Environment of Akwa Ibom State, Nigeria towards effective monitoring of sand mining mites and post-management techniques. Multi-stage random sampling was used to select nine (9) Local Government Areas and three (3) communities from the selected local Government Areas in Akwa Ibom State. Primary data were collected with structured questionnaires and focus group discussion. The study reveals that post-management guidelines of sand mining environment was not adopted in the study area to the failure in management of the environment in which a larger expanse of agricultural land have been converted to waste land and borrow pit. This work found that acquisition of sand mining permit was grossly ignored among sand miners in some mining communities, whereas other miners who obtained their permit deliberately hired too many dredgers in their allocated sand mining sites and the stakeholders mandated to monitor sand mining sites did not visit the sites and were relatively unaware of the illegal businesses going on in the sand mining sites. Chi-square was used to examine the impact of stakeholders on management of sand mining environment. The result indicated that a value of 204.565 at p<0.05 was obtained and it was concluded that stakeholders in the solid mineral exploration industry should re-direct their interest toward post-management of sand mining environment so as to restore degraded ecosystem for further land use purposes.


2021 ◽  
Vol 193 (9) ◽  
Author(s):  
Brian J. Straight ◽  
Devin N. Castendyk ◽  
Diane M. McKnight ◽  
Connor P. Newman ◽  
Pierre Filiatreault ◽  
...  

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