|
| Effect of biochar on the aerobic fermentation of dissolved organic matter and on heavy metal forms |
| Received:June 15, 2021 |
| View Full Text View/Add Comment Download reader |
| KeyWord:biochar;pig manure;aerobic fermentation;dissolved organic matter(DOM);heavy metal |
| Author Name | Affiliation | E-mail | | WANG Xinyu | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | ZHANG Xi | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | DING Jingtao | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | SHEN Yujun | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | shenyj09b@163.com | | MENG Haibo | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | ZHOU Haibin | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | CHENG Hongsheng | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | WANG Jian | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | | | LI Ran | Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China | |
|
| Hits: 952 |
| Download times: 1063 |
| Abstract: |
| The physical and chemical characteristics of the fermentation process, changes in the composition of dissolved organic matter (DOM), changes in the binding form of heavy metals, and the influence mechanism of biochar were investigated. Pig manure and straw were used as raw materials to which different proportions of biochar-used as a passivation material-were added to carry out aerobic fermentation experiments to analyze the physical and chemical properties associated with different fermentation times and DOM components and the influencing factors and mechanisms of heavy metal forms. Results showed that the contents of the humic substances in the 0, 5%, 15%, and 25% treatment groups increased by 22.69%, 24.49%, 25.32%, and 25.45%, respectively; they showed varying degrees of passivation effect on Cu, Zn, Pb, and Cd. The passivation rates were 25.80%~47.00%, 16.73%~31.34%, 31.81%~57.68%, and 20.00%~71.47%. The relatively more active adsorption state transformed to a more stable complex form and precipitation form. The change in DOM, temperature, pH, EC, and moisture content had significant effects on the form of heavy metals. Among them, fulvic acid and humic acid had significant effects on the exchangeability of Cu, Zn, Cd, and Pb. Humic acid played a major role in the complexation of heavy metals, and pH had a greater impact on promoting biochar and heavy metal ion exchange and co-precipitation and the stability of heavy metal complexes. These results indicated that adding biochar during the aerobic fermentation of pig manure can promote the conversion of fulvic acid to humic acid in the DOM component, thereby promoting the formation of stable humic substances and increasing the efficiency of heavy metal passivation. |
|
|
|
