dc.contributor.advisor |
Mujuru, M.
|
|
dc.contributor.advisor |
Masukume, Mike
|
|
dc.contributor.author |
Moshobane, Mashilo Doris
|
|
dc.date.accessioned |
2020-02-12T09:18:17Z |
|
dc.date.available |
2020-02-12T09:18:17Z |
|
dc.date.issued |
2019-09 |
|
dc.date.submitted |
2020-02 |
|
dc.identifier.uri |
http://hdl.handle.net/10500/26257 |
|
dc.description.abstract |
This study was undertaken to assess the “effectiveness” of acid mine drainage
(AMD) mitigation and management strategies in the West Rand region, Gauteng,
South Africa. It involved the determination of water quality at selected points along
Twelopiespruit stream. The water quality data was analysed using Microsoft Excel
and Geographical Information System (GIS) modelling technique to determine river
water quality against the regulatory wastewater standards and legal framework.
The findings showed that Fe (II) was reduced from a high concentration of 490 mg/L
from Winze 18 to 9.57mg/L at the discharge point (Pit), which is an over 95%
removal of Fe (II) from the AMD. Water from Winze 18 shaft was acidic and was
treated to raise the pH to between 8 and 10 leading to the precipitation of metal
hydroxides and oxides. Sulphate concentrations at the discharge point were as high
as 2700 mg/L against the DWS sulphate effluent limit of 600 mg/L. High
concentrations of sulphates at the discharge point clearly showed that water
treatment technologies within the study area were unable to lower the sulphates levels to meet the regulatory sulphate standards in the effluent.
Further, findings revealed that current legal and policy factors do not
promote uncompromising control measures to the mines in addressing the
detrimental impact of AMD. Thus, alternative ways to remediate AMD, particularly
options that remediate high concentration of sulphates, were recommended. |
en |
dc.format.extent |
1 online resource (xiii, 78 leaves) : Illustrations (chiefly color), graphs (chiefly color), color maps |
en |
dc.language.iso |
en |
en |
dc.subject |
Mitigation |
en |
dc.subject |
Management |
en |
dc.subject |
Effectiveness |
en |
dc.subject.ddc |
628.168320968222 |
|
dc.subject.lcsh |
Acid mine drainage -- South Africa -- West Rand |
en |
dc.subject.lcsh |
Mine drainage -- South Africa -- West Rand |
en |
dc.title |
Evaluation of the management strategies of mine wastewater in West Rand area, Gauteng province in South Africa |
en |
dc.type |
Dissertation |
en |
dc.description.department |
Environmental Sciences |
en |
dc.description.degree |
M. Sc. (Environmental Management) |
|