@article{(Open Science Index):https://publications.waset.org/pdf/8043, title = {Treatment of Acid Mine Drainage Using Un- Activated Bentonite and Limestone}, author = {Thembelihle Nkonyane and Freeman Ntuli and Edison Muzenda}, country = {}, institution = {}, abstract = {The use of un-activated bentonite, and un-activated bentonite blended with limestone for the treatment of acid mine drainage (AMD) was investigated. Batch experiments were conducted in a 5 L PVC reactor. Un-activated bentonite on its own did not effectively neutralize and remove heavy metals from AMD. The final pH obtained was below 4 and the metal removal efficiency was below 50% for all the metals when bentonite solid loadings of 1, 5 and 10% were used. With un-activated bentonite (1%) blended with 1% limestone, the final pH obtained was approximately 7 and metal removal efficiencies were greater than 60% for most of the metals. The Langmuir isotherm gave the best fit for the experimental data giving correlation coefficient (R2) very close to 1. Thus, it was concluded that un-activated bentonite blended with limestone is suitable for potential applications in removing heavy metals and neutralizing AMD.}, journal = {International Journal of Materials and Metallurgical Engineering}, volume = {6}, number = {8}, year = {2012}, pages = {667 - 672}, ee = {https://publications.waset.org/pdf/8043}, url = {https://publications.waset.org/vol/68}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 68, 2012}, }