Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil
Article
Article Title | Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil |
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ERA Journal ID | 200924 |
Article Category | Article |
Authors | Kumarathilaka, Prasanna and Vithanage, Meththika |
Journal Title | Journal of Chemistry |
Journal Citation | 2017, pp. 1-9 |
Article Number | 6180636 |
Number of Pages | 9 |
Year | 2017 |
Place of Publication | United Kingdom |
ISSN | 2090-9063 |
2090-9071 | |
Digital Object Identifier (DOI) | https://doi.org/10.1155/2017/6180636 |
Web Address (URL) | https://www.hindawi.com/journals/jchem/2017/6180636/ |
Abstract | Perchlorate (ClO4-) is a strong oxidizer, capable of accelerating heavy metal release into regolith/soil. Here, we assessed interactions between ClO4-and serpentine soil to simulate and understand the fate of Ni and Mn and their immobilization with the presence of biochar (BC). A soil incubation study (6 months) was performed using serpentine soil in combination with different ClO4-concentrations (0.25, 0.5, 0.75, and 1 wt.%) and three different amendment rates (1, 2.5, and 5 wt.%) of Gliricidia sepium BC. Bioavailable fraction of Ni and Mn was analyzed using CaCl2 extraction method. An increase of ClO4-concentrations enhanced bioavailability fraction of Ni and Mn. However, BC amendments reduced the bioavailability of Ni and Mn. In comparison, 5% BC amendment significantly immobilized the bioavailability of Ni (68-92%) and Mn (76-93%) compared to other BC amendment rates. Electrostatic attractions and surface diffusion could be postulated for Ni and Mn immobilization by BC. In addition, ClO4-may have adsorbed to BC via hydrogen bonding which may reduce the influence of ClO4-on Ni and Mn mobility. Overall, it is obvious that BC could be utilized as an effective amendment to immobilize Ni and Mn in heavy metal and ClO4-contaminated soil. |
Byline Affiliations | National Institute of Fundamental Studies, Sri Lanka |
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https://research.usq.edu.au/item/wv493/influence-of-gliricidia-sepium-biochar-on-attenuate-perchlorate-induced-heavy-metal-release-in-serpentine-soil
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