- Title
- Utilization of phosphorus loaded alkaline residue to immobilize lead in a shooting range soil
- Creator
- Yan, Yubo; Qi, Fangjie; Bolan, Nanthi; Balaji, Seshadri; Xu, Yilu; Hou, Jiexi; Ok, Yong Sik; Dong, Xiaoli; Li, Qiao; Sun, Xiuyun; Wang, Lianjun
- Relation
- Chemosphere Vol. 162, p. 315-323
- Publisher Link
- http://dx.doi.org/10.1016/j.chemosphere.2016.07.068
- Publisher
- Pergamon Press
- Resource Type
- journal article
- Date
- 2016
- Description
- The alkaline residue generated from the production of soda ash using the ammonia-soda method has been successfully used in removing phosphorus (P) from aqueous solution. But the accumulation of P-containing solid after P removal is an undesirable menace to the environment. To achieve the goal of recycling, this study explored the feasibility of reusing the P loaded alkaline residue as an amendment for immobilization of lead (Pb) in a shooting range soil. The main crystalline phase and micromorphology of amendments were determined using X-ray diffraction (XRD) and scanning electron microscopy-electron dispersion spectroscopy (SEM-EDS) methods. The toxicity characteristic leaching procedure (TCLP), sequential extraction procedure, and physiologically based extraction test (PBET) were employed to evaluate the effectiveness of Pb immobilization in soil after 45 d incubation. Treatment with P loaded alkaline residue was significantly effective in reducing the TCLP and PBET extractable Pb concentrations in contrast to the untreated soil. Moreover, a positive change in the distribution of Pb fractions was observed in the treated soil, i.e., more than 60% of soil-Pb was transformed to the residual fraction compared to the original soil. On the other hand, P loaded amendments also resulted in a drastic reduction in phytoavailable Pb to the winter wheat and a mild release of P as a nutrient in treated soil, which also confirmed the improvement of soil quality.
- Subject
- alkaline residue; phosphorus (P); Pb immobilization
- Identifier
- http://hdl.handle.net/1959.13/1347681
- Identifier
- uon:30097
- Identifier
- ISSN:0045-6535
- Language
- eng
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