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Item type:Publication, Removal of heavy metals using a wetland batch system with carrizo (Phragmites australis (Cav.) Trin. ex Steud.): a laboratory assessment(Elsevier, 2021-08-16)One of the greatest environmental issues related to the development of the mining activity is the generation of Acid Mine Drainage (AMD). This effluent generated by active and abandoned mines in Peru produces multiple discussions about the role of the industry for a sustainable development. Many methods have been developed for AMD treatment, being wetlands a good option for heavy metal removal. In this sense, removal of heavy metal by using laboratory constructed wetlands with phragmites australis (cav.) trin. ex steud. was studied. During a 9-day period the variation of different physicochemical parameters and heavy metals concentrations was recorded. The pH decreased to a constant value of 8.24 after the sixth day. The electrical conductivity presented a slight variation from 1 to 1.33 μS cm−1 on the ninth day. Moreover, fluctuating values of Dissolved Oxygen and Turbidity were observed. A reduction between 69% and 93% of ammonia nitrogen (NH3-N) was registered. Cu concentration was reduced in 68% and 87%; Zn concentrations dropped in 53% and 95%; and Pb was reduced in 20% and 55%. It was concluded that phragmites australis (cav.) trin. ex steud. can be an alternative in the treatment of the contaminants produced by AMD. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Accumulation of As, Ag, Cd, Cu, Pb, and Zn by native plants growing in soils contaminated by mining environmental liabilities in the Peruvian Andes(MDPI AG, 2021-02-01)The capability of native plant species grown in polluted post-mining soils to accumulate metals was evaluated in view of their possible suitability for phytoremediation. The study areas included two environmental liabilities in the Cajamarca region in the Peruvian Andes. The content of As, Ag, Cd, Cu, Pb, and Zn was determined in individual plant organs and correlated with soil characteristics. The degree of the pollution depended on the metal with results ranging from uncontaminated (Cd) to moderately (Zn), strongly (As, Cu), and extremely contaminated (Pb, Ag) soils. The metals were mainly present in the fractions with limited metal mobility. The bioaccu-mulation of the metals in plants as well the translocation into overground organs was determined. Out of the 21 plants evaluated, Pernettya prostrata and Gaultheria glomerate were suitable for Zn, and Gaultheria glomerata and Festuca sp. for Cd, phytostabilization. The native species applicable for Cd phytoremediation were Ageratina glechonophylla, Bejaria sp., whereas Pernettya prostrata Achyrocline alata, Ageratina fastigiate, Baccharis alnifolia, Calceolaria tetragona, Arenaria digyna, Hypericum laricifolium, Brachyotum radula, and Nicotiana thyrsiflora were suitable for both Cd and Zn. None of the studied plants appeared to be suitable for phytoremediation of Pb, Cu, As and Ag. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Schoenoplectus californicus as potential remover of metal elements from mine effluents: A laboratory assessment(Wiley, 2022-11-30)Acid mine drainage (AMD) is one of the most significant environmental challenges facing the mining industry worldwide. For this reason, many methods for AMD treatment are developed, being wetlands a good option for metal elements removal from these mining effluents. The efficiency of Peruvian native plants such as Schoenoplectus californicus ( S. californicus ) to remove metal elements in effluents through artificial wetlands is studied. Batch removal tests are carried out with different effluents containing copper, zinc, lead, and iron. For iron‐metal binary effluents, copper, zinc, and lead are removed by 82%, 75%, and 88%; while in the effluent containing all metals, the removal rate is 90% and 92% for copper and lead, respectively. According to the preliminary results, it is concluded that iron interferes more in the removal of zinc and lead than in copper from binary effluents. The use of S. californicus turns out to be an efficient, attractive, and economical alternative for the treatment of effluents contaminated with copper, zinc, lead, and iron. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Evaluation of Heavy Metal Removal Using Phragmites australis (Cav.) and Schoenoplectus californicus (C.A. Mey.): A Comparison of the Dry Ashing and Wet Digestion Method(Iranian Chemical Society, 2023-01-01)This study presents the evaluation of heavy metal removal using Phragmites australis (Cav.) and Schoenoplectus californicus (C.A. Mey.) in a laboratory wetland test (10-days). Two digestion methods: Dry Ashing and Wet Digestion to determine the final concentration of heavy metal in the roots and stems of both plants were used. The final concentration of Cu (5.14 φg g-1), Zn (27.34 φg g-1), and Fe (107.91 φg g-1) were determined in the roots of the Schoenoplectus californicus (C.A. Mey.). While in its stems the highest concentration of Pb (1.69 φg g-1) was founded. In Phragmites australis (Cav.) the high concentrations of Cu (2.44 φg g-1), Zn (5.22 φg g-1), and Fe (28.10 φg g-1) are found in the roots and Pb (0.70 φg g-1) in the stems. Regardless of the plants studied, the Wet Digestion method was the most suitable pretreatment method for determining Cu and Fe concentrations, while the Dry Ashing method was the best for Zn and Pb.