Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD
Acid mine drainage was collected from the western decant in Krugersdorp, South Africa, to conduct a series of laboratory tests using 200 mL of AMD in five beakers dosed with increasing bentonite clay and decreasing pulverised fly ash respectively (flocculent-A) to establish accurate FA:BC dosing rat...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-03-01
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| Series: | Water Practice and Technology |
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| Online Access: | http://wpt.iwaponline.com/content/17/3/661 |
| _version_ | 1811307143878410240 |
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| author | I. O. Ntwampe |
| author_facet | I. O. Ntwampe |
| author_sort | I. O. Ntwampe |
| collection | DOAJ |
| description | Acid mine drainage was collected from the western decant in Krugersdorp, South Africa, to conduct a series of laboratory tests using 200 mL of AMD in five beakers dosed with increasing bentonite clay and decreasing pulverised fly ash respectively (flocculent-A) to establish accurate FA:BC dosing ratio. Two similar sets of experiments were conducted using a combination of bentonite clay and fly ash demineralized with distilled water (flocculent-B) and the other samples with tap water (flocculent-C). The pH, electrical conductivity (EC), turbidity and toxic metals were analyzed before and after experiments, i.e. As, Co, Zn and Pb, and treated in a jar test at 250 rpm for 2 min and reduced to 100 rpm for 10 min, allowed to settle for 1 hour after which the measurements were conducted. Turbidity removal of the samples of flocculent-A was slightly lower (72.5–75.1%) compared to that of flocculent-B and C (95.3–97.3%). On the other hand, FA:BC of 3:1 showed the highest turbidity removal. Toxic metals removal (85.9–94.8%) in the samples with flocculent-B and C is also higher compared to that of flocculent A. The SEM micrographs of the samples with flocculent-B and C showed large flocs indicating optimal sorption. HIGHLIGHTS
Use of flyash.;
AMD treatment with pH adjustment.;
Removal of toxic metals.;
Removal of pollutants.;
Efficiency of pollutant removal using a flocculent.; |
| first_indexed | 2024-04-13T08:59:23Z |
| format | Article |
| id | doaj.art-e8de970569cb457c9d67ee21936b3a88 |
| institution | Directory Open Access Journal |
| issn | 1751-231X |
| language | English |
| last_indexed | 2024-04-13T08:59:23Z |
| publishDate | 2022-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Practice and Technology |
| spelling | doaj.art-e8de970569cb457c9d67ee21936b3a882022-12-22T02:53:11ZengIWA PublishingWater Practice and Technology1751-231X2022-03-0117366167410.2166/wpt.2022.013013Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMDI. O. Ntwampe0 Ntwampe Trading & Projects (PTY) Ltd, 497 Broadacres, Fourways, Johannesburg, South Africa Acid mine drainage was collected from the western decant in Krugersdorp, South Africa, to conduct a series of laboratory tests using 200 mL of AMD in five beakers dosed with increasing bentonite clay and decreasing pulverised fly ash respectively (flocculent-A) to establish accurate FA:BC dosing ratio. Two similar sets of experiments were conducted using a combination of bentonite clay and fly ash demineralized with distilled water (flocculent-B) and the other samples with tap water (flocculent-C). The pH, electrical conductivity (EC), turbidity and toxic metals were analyzed before and after experiments, i.e. As, Co, Zn and Pb, and treated in a jar test at 250 rpm for 2 min and reduced to 100 rpm for 10 min, allowed to settle for 1 hour after which the measurements were conducted. Turbidity removal of the samples of flocculent-A was slightly lower (72.5–75.1%) compared to that of flocculent-B and C (95.3–97.3%). On the other hand, FA:BC of 3:1 showed the highest turbidity removal. Toxic metals removal (85.9–94.8%) in the samples with flocculent-B and C is also higher compared to that of flocculent A. The SEM micrographs of the samples with flocculent-B and C showed large flocs indicating optimal sorption. HIGHLIGHTS Use of flyash.; AMD treatment with pH adjustment.; Removal of toxic metals.; Removal of pollutants.; Efficiency of pollutant removal using a flocculent.;http://wpt.iwaponline.com/content/17/3/661bentonite clayfly ashmixingphturbidity |
| spellingShingle | I. O. Ntwampe Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD Water Practice and Technology bentonite clay fly ash mixing ph turbidity |
| title | Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD |
| title_full | Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD |
| title_fullStr | Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD |
| title_full_unstemmed | Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD |
| title_short | Efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in AMD |
| title_sort | efficiency of a flocculent consisting of bentonite clay and fly ash for the removal of pollutants in amd |
| topic | bentonite clay fly ash mixing ph turbidity |
| url | http://wpt.iwaponline.com/content/17/3/661 |
| work_keys_str_mv | AT iontwampe efficiencyofaflocculentconsistingofbentoniteclayandflyashfortheremovalofpollutantsinamd |