The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2
Sets of experiments were conducted using 200 mL of synthetic acid mine drainage (AMD) into five 500 mL glass beakers, dosed with varying quantities of bentonite clay, saw dust and CaMg.2(OH)2 respectively and as a flocculent (bentonite clay, saw dust and CaMg.2(OH)2), mixed at 250 and 100 rpm for 2...
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IWA Publishing
2021
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oai:doaj.org-article:035048bceec442dbbc3c2a726ee542c32021-11-05T21:16:58ZThe removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)21751-231X10.2166/wpt.2021.075https://doaj.org/article/035048bceec442dbbc3c2a726ee542c32021-10-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/4/1234https://doaj.org/toc/1751-231XSets of experiments were conducted using 200 mL of synthetic acid mine drainage (AMD) into five 500 mL glass beakers, dosed with varying quantities of bentonite clay, saw dust and CaMg.2(OH)2 respectively and as a flocculent (bentonite clay, saw dust and CaMg.2(OH)2), mixed at 250 and 100 rpm for 2 and 10 mins respectively. The samples settled for 1 hour after which the pH, conductivity, turbidity, dissolved oxygen, oxidation reduction potential and toxic metals were measured. The turbidity removal of AMD samples treated with a flocculent (0–23 NTU) is lower compared to that of the samples treated with bentonite clay and saw dust (27–32 NTU). Results show 100% removal of Ni, moderate percentage removal of Fe and slightly lower percentage of Cu in treated AMD using a flocculent. Turbidity removal in treated AMD using a flocculent is higher compared to that of the samples treated with bentonite clay, saw dust or CaMg.2(OH)2. Treated AMD using flocculent has low Ca, Mg, Cl− and SO42− content (>84.8%). The SEM micrograph of the sludge of the sample with a combination of 1.5 bentonite clay, 1.5 g saw dust and 20 mL 0.025 M CaMg.2(OH)2 dosage shows optimal sorption of turbid materials. HIGHLIGHTS Study utilises waste material.; Treatment conducted without pH adjustment.; Study removes total pollutants.; Study utilises unprocessed reagents.; Study utilises synthetic CaMg.2(OH)2 coagulant.;I. O. NtwampeIWA PublishingarticleamddosageflocculentmixedphsettledEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 4, Pp 1234-1247 (2021) |
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DOAJ |
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DOAJ |
| language |
EN |
| topic |
amd dosage flocculent mixed ph settled Environmental technology. Sanitary engineering TD1-1066 |
| spellingShingle |
amd dosage flocculent mixed ph settled Environmental technology. Sanitary engineering TD1-1066 I. O. Ntwampe The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| description |
Sets of experiments were conducted using 200 mL of synthetic acid mine drainage (AMD) into five 500 mL glass beakers, dosed with varying quantities of bentonite clay, saw dust and CaMg.2(OH)2 respectively and as a flocculent (bentonite clay, saw dust and CaMg.2(OH)2), mixed at 250 and 100 rpm for 2 and 10 mins respectively. The samples settled for 1 hour after which the pH, conductivity, turbidity, dissolved oxygen, oxidation reduction potential and toxic metals were measured. The turbidity removal of AMD samples treated with a flocculent (0–23 NTU) is lower compared to that of the samples treated with bentonite clay and saw dust (27–32 NTU). Results show 100% removal of Ni, moderate percentage removal of Fe and slightly lower percentage of Cu in treated AMD using a flocculent. Turbidity removal in treated AMD using a flocculent is higher compared to that of the samples treated with bentonite clay, saw dust or CaMg.2(OH)2. Treated AMD using flocculent has low Ca, Mg, Cl− and SO42− content (>84.8%). The SEM micrograph of the sludge of the sample with a combination of 1.5 bentonite clay, 1.5 g saw dust and 20 mL 0.025 M CaMg.2(OH)2 dosage shows optimal sorption of turbid materials. HIGHLIGHTS
Study utilises waste material.;
Treatment conducted without pH adjustment.;
Study removes total pollutants.;
Study utilises unprocessed reagents.;
Study utilises synthetic CaMg.2(OH)2 coagulant.; |
| format |
article |
| author |
I. O. Ntwampe |
| author_facet |
I. O. Ntwampe |
| author_sort |
I. O. Ntwampe |
| title |
The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| title_short |
The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| title_full |
The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| title_fullStr |
The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| title_full_unstemmed |
The removal of turbidity and toxic metals in the AMD using a combination of saw dust, bentonite clay and synthetic CaMg.2(OH)2 |
| title_sort |
removal of turbidity and toxic metals in the amd using a combination of saw dust, bentonite clay and synthetic camg.2(oh)2 |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/035048bceec442dbbc3c2a726ee542c3 |
| work_keys_str_mv |
AT iontwampe theremovalofturbidityandtoxicmetalsintheamdusingacombinationofsawdustbentoniteclayandsyntheticcamg2oh2 AT iontwampe removalofturbidityandtoxicmetalsintheamdusingacombinationofsawdustbentoniteclayandsyntheticcamg2oh2 |
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