Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil
A 56d incubation experiment was conducted to explore the effects of the silk-worm excrement biochar (500 °C, BC) combined with different iron-based materials (FeCl3, FeSO4, and reduced iron powder) on the speciation of cadmium (Cd) and lead (Pb) in a contaminated soil. Application rate of BC...
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| Format: | Article |
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MDPI AG
2018-10-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/10/1999 |
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| author | Pengyang Bian Jingjing Zhang Chaolan Zhang He Huang Qun Rong Haixia Wu Xue Li Mengmeng Xu Yu Liu Siwei Ren |
| author_facet | Pengyang Bian Jingjing Zhang Chaolan Zhang He Huang Qun Rong Haixia Wu Xue Li Mengmeng Xu Yu Liu Siwei Ren |
| author_sort | Pengyang Bian |
| collection | DOAJ |
| description | A 56d incubation experiment was conducted to explore the effects of the silk-worm excrement biochar (500 °C, BC) combined with different iron-based materials (FeCl3, FeSO4, and reduced iron powder) on the speciation of cadmium (Cd) and lead (Pb) in a contaminated soil. Application rate of BC and iron-based materials is 1% (W/W) and 0.2% (W/W) of the soil, respectively. At the same time, the soil physicochemical properties, such as pH, cation exchange capacity (CEC), and the structure of soil, were determined in order to explore the influence mechanism of amendments to forms of Cd and Pb in soil. The results show that the stabilization effects on Cd is (BC + FeSO4) > (BC + FeCl3) > (BC + Fe) > (BC) and Pb is (BC + Fe) > (BC + FeSO4) > (BC + FeCl3) > (BC) at the end of incubation, compared with the effect of the control group. The treatment of (BC + FeSO4) is the most effective in terms of the stabilization of Cd and Pb, which makes the percentages of organic-bound and residual Cd and Pb increase by 40.90% and 23.51% respectively. In addition, with different ways of treatment, the pH value and CEC of soil see a remarkable increase by 1.65–2.01 units and 2.01–2.58 cmol·kg−1 respectively. X-ray diffraction (XRD) patterns show that the soil imprisons Cd and Pb in different mineral phases. As such the treatment of (BC + FeSO4) can significantly improve soil environment, increase soil pH value & CEC and exert a relatively good stabilization effect on both Cd and Pb. |
| first_indexed | 2024-12-12T19:45:51Z |
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| id | doaj.art-49a2340e94a346f19bdda63ba051e186 |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T19:45:51Z |
| publishDate | 2018-10-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-49a2340e94a346f19bdda63ba051e1862022-12-22T00:14:05ZengMDPI AGApplied Sciences2076-34172018-10-01810199910.3390/app8101999app8101999Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in SoilPengyang Bian0Jingjing Zhang1Chaolan Zhang2He Huang3Qun Rong4Haixia Wu5Xue Li6Mengmeng Xu7Yu Liu8Siwei Ren9College of Agriculture, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaCollege of Life Science and Techonlogy, Guangxi University, Nanning 530004, ChinaCollege of Life Science and Techonlogy, Guangxi University, Nanning 530004, ChinaCollege of Agriculture, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaA 56d incubation experiment was conducted to explore the effects of the silk-worm excrement biochar (500 °C, BC) combined with different iron-based materials (FeCl3, FeSO4, and reduced iron powder) on the speciation of cadmium (Cd) and lead (Pb) in a contaminated soil. Application rate of BC and iron-based materials is 1% (W/W) and 0.2% (W/W) of the soil, respectively. At the same time, the soil physicochemical properties, such as pH, cation exchange capacity (CEC), and the structure of soil, were determined in order to explore the influence mechanism of amendments to forms of Cd and Pb in soil. The results show that the stabilization effects on Cd is (BC + FeSO4) > (BC + FeCl3) > (BC + Fe) > (BC) and Pb is (BC + Fe) > (BC + FeSO4) > (BC + FeCl3) > (BC) at the end of incubation, compared with the effect of the control group. The treatment of (BC + FeSO4) is the most effective in terms of the stabilization of Cd and Pb, which makes the percentages of organic-bound and residual Cd and Pb increase by 40.90% and 23.51% respectively. In addition, with different ways of treatment, the pH value and CEC of soil see a remarkable increase by 1.65–2.01 units and 2.01–2.58 cmol·kg−1 respectively. X-ray diffraction (XRD) patterns show that the soil imprisons Cd and Pb in different mineral phases. As such the treatment of (BC + FeSO4) can significantly improve soil environment, increase soil pH value & CEC and exert a relatively good stabilization effect on both Cd and Pb.http://www.mdpi.com/2076-3417/8/10/1999silkworm excrementbiocharferrous materialssoil contaminationstabilization |
| spellingShingle | Pengyang Bian Jingjing Zhang Chaolan Zhang He Huang Qun Rong Haixia Wu Xue Li Mengmeng Xu Yu Liu Siwei Ren Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil Applied Sciences silkworm excrement biochar ferrous materials soil contamination stabilization |
| title | Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil |
| title_full | Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil |
| title_fullStr | Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil |
| title_full_unstemmed | Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil |
| title_short | Effects of Silk-Worm Excrement Biochar Combined with Different Iron-Based Materials on the Speciation of Cadmium and Lead in Soil |
| title_sort | effects of silk worm excrement biochar combined with different iron based materials on the speciation of cadmium and lead in soil |
| topic | silkworm excrement biochar ferrous materials soil contamination stabilization |
| url | http://www.mdpi.com/2076-3417/8/10/1999 |
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