Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system
The use of amalgamation process to recover gold from mined ores by the small-scale gold miners in the Philippines and other developing countries produces and dispose of untreated wastewater to the receiving water bodies. In this study, a field-scale filter bed system was constructed to treat heavy m...
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2019-10-01
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| Series: | Global Journal of Environmental Science and Management |
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| author | J. Samaniego M.A.N. Tanchuling |
| author_facet | J. Samaniego M.A.N. Tanchuling |
| author_sort | J. Samaniego |
| collection | DOAJ |
| description | The use of amalgamation process to recover gold from mined ores by the small-scale gold miners in the Philippines and other developing countries produces and dispose of untreated wastewater to the receiving water bodies. In this study, a field-scale filter bed system was constructed to treat heavy metal metal-laden wastewater collected from small-scale gold mining site in Paracale, Camarines Norte, Philippines. The filter bed system was consists of sedimentation tank and filter bed with Cocopeat, a by-product of coconut husk, as adsorbent. Physico-chemical parameters (temperature, pH, oxidation-reduction potential, electrical conductivity, turbidity, dissolved oxygen, total dissolved solids, salinity, total suspended solids, color) and heavy metal (As, Ba, Cd, Hg, Pb) concentrations were monitored during the 50 days experiment at a flow rate of 40 Liter per hour for 3 hours daily wastewater application. Significant reduction was achieved on heavy metals; As (97.11%), Ba (39.75%), Cd (74.24%), Hg (97.02%), Pb (98.82%) from small-scale gold mining (SSGM)wastewater in sedimentation phase and further reductions on As (1.39%), Ba (28.00%), Cd (4.95%), Hg (2.91%), Pb (0.97%) were achieved by adsorption in the Cocopeat filter bed. Measured effluent physico-chemical parameters and heavy metal concentrations were within the respective regulatory limits. Other effluent parameters with strong correlation with total suspended solids such as turbidity and color, though not regulated, were reduced significantly. All adsorbed heavy metals accumulated in the upper 25 cm of the Cocopeat column in the filter bed. Measured heavy metal concentrations in Cocopeat suggest that the adsorbent was not saturated and further application of small-scale gold mining wastewater is recommended to determine its useful life. |
| format | Article |
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| institution | Kabale University |
| issn | 2383-3572 2383-3866 |
| language | English |
| publishDate | 2019-10-01 |
| publisher | GJESM Publisher |
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| series | Global Journal of Environmental Science and Management |
| spelling | doaj-art-7bf9fcbfd2b342fea9a3e05e60803e002025-02-02T17:28:33ZengGJESM PublisherGlobal Journal of Environmental Science and Management2383-35722383-38662019-10-015446147010.22034/GJESM.2019.04.0636261Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed systemJ. Samaniego0M.A.N. Tanchuling1Department of Science and Technology - Philippine Nuclear Research Institute, Commonwealth Ave., Diliman, Quezon City, Philippines|Environmental Engineering Graduate Program, College of Engineering, University of the Philippines-Diliman, Quezon City, Philippines.Environmental Engineering Graduate Program, College of Engineering, University of the Philippines-Diliman, Quezon City, PhilippinesThe use of amalgamation process to recover gold from mined ores by the small-scale gold miners in the Philippines and other developing countries produces and dispose of untreated wastewater to the receiving water bodies. In this study, a field-scale filter bed system was constructed to treat heavy metal metal-laden wastewater collected from small-scale gold mining site in Paracale, Camarines Norte, Philippines. The filter bed system was consists of sedimentation tank and filter bed with Cocopeat, a by-product of coconut husk, as adsorbent. Physico-chemical parameters (temperature, pH, oxidation-reduction potential, electrical conductivity, turbidity, dissolved oxygen, total dissolved solids, salinity, total suspended solids, color) and heavy metal (As, Ba, Cd, Hg, Pb) concentrations were monitored during the 50 days experiment at a flow rate of 40 Liter per hour for 3 hours daily wastewater application. Significant reduction was achieved on heavy metals; As (97.11%), Ba (39.75%), Cd (74.24%), Hg (97.02%), Pb (98.82%) from small-scale gold mining (SSGM)wastewater in sedimentation phase and further reductions on As (1.39%), Ba (28.00%), Cd (4.95%), Hg (2.91%), Pb (0.97%) were achieved by adsorption in the Cocopeat filter bed. Measured effluent physico-chemical parameters and heavy metal concentrations were within the respective regulatory limits. Other effluent parameters with strong correlation with total suspended solids such as turbidity and color, though not regulated, were reduced significantly. All adsorbed heavy metals accumulated in the upper 25 cm of the Cocopeat column in the filter bed. Measured heavy metal concentrations in Cocopeat suggest that the adsorbent was not saturated and further application of small-scale gold mining wastewater is recommended to determine its useful life.https://www.gjesm.net/article_36261_05bf5fd36316f2d2fb7cf21dab4cf642.pdfAdsorptionCocopeatheavy metalsMining wastewatersedimentation |
| spellingShingle | J. Samaniego M.A.N. Tanchuling Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system Global Journal of Environmental Science and Management Adsorption Cocopeat heavy metals Mining wastewater sedimentation |
| title | Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system |
| title_full | Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system |
| title_fullStr | Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system |
| title_full_unstemmed | Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system |
| title_short | Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system |
| title_sort | treatment of small scale gold mining wastewater using pilot scale sedimentation and cocopeat filter bed system |
| topic | Adsorption Cocopeat heavy metals Mining wastewater sedimentation |
| url | https://www.gjesm.net/article_36261_05bf5fd36316f2d2fb7cf21dab4cf642.pdf |
| work_keys_str_mv | AT jsamaniego treatmentofsmallscalegoldminingwastewaterusingpilotscalesedimentationandcocopeatfilterbedsystem AT mantanchuling treatmentofsmallscalegoldminingwastewaterusingpilotscalesedimentationandcocopeatfilterbedsystem |