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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Solid-Phase Partitioning and Leaching Behavior of Pb and Zn from Playground Soils in Kabwe, Zambia
| Title: | Solid-Phase Partitioning and Leaching Behavior of Pb and Zn from Playground Soils in Kabwe, Zambia |
| Authors: | Mufalo, Walubita Browse this author | | Tangviroon, Pawit Browse this author | | Igarashi, Toshifumi Browse this author →KAKEN DB | | Ito, Mayumi Browse this author →KAKEN DB | | Sato, Tsutomu Browse this author →KAKEN DB | | Chirwa, Meki Browse this author | | Nyambe, Imasiku Browse this author | | Nakata, Hokuto Browse this author →KAKEN DB | | Nakayama, Shouta Browse this author →KAKEN DB | | Ishizuka, Mayumi Browse this author →KAKEN DB |
| Keywords: | contamination | | lead | | zinc | | bio-accessibility | | leaching | | Kabwe | | Zambia |
| Issue Date: | Oct-2021 |
| Publisher: | MDPI |
| Journal Title: | Toxics |
| Volume: | 9 |
| Issue: | 10 |
| Start Page: | 248 |
| Publisher DOI: | 10.3390/toxics9100248 |
| Abstract: | Zambia's Kabwe mine wastes (KMWs) are responsible for contaminating the surrounding soil and dust in the Kabwe district. Unfortunately, these wastes arise from the historical mining activities of lead (Pb) and Zinc (Zn), which lacked adequate waste management strategies. As a result, potentially toxic elements (PTEs) (Pb and Zn) spread across the Kabwe district. To assess the soil pollution derived from previous mining activities, we studied topsoil samples (n = 8) from the school playground soils (SPs). In this study, the degree of contamination, geochemical partitioning, and leachability, coupled with the release and retention of Pb and Zn, were studied. The SPs were classified as extremely enriched (EF > 40) and contaminated with Pb (I-geo > 5). On average, Pb (up to 89%) and Zn (up to 69%) were bound with exchangeable, weak acid-soluble, reducible and oxidizable phases, which are considered as 'geochemically mobile' phases in the environment. The leachates from the soils (n = 5) exceeded the Zambian standard (ZS: 190:2010) for Pb in potable drinking water (Pb < 0.01 mg/L). Furthermore, the spatial distribution of Pb and Zn showed a significant reduction in contents of Pb and Zn with the distance from the mine area.</p> |
| Type: | article |
| URI: | http://hdl.handle.net/2115/83428 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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