Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism
Biochar is often used for the removal of phosphorus in wastewater. However, the improper treatment of adsorbed biochar might cause secondary pollution. In order to promote the recycling and harmless utilization of biochar with adsorbed phosphorus, a new modified biochar (ABC) was prepared from cyano...
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oai:doaj.org-article:4e7d5b583fb54c67a30b906c447375ed2021-11-11T19:39:25ZEffects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism10.3390/su1321119732071-1050https://doaj.org/article/4e7d5b583fb54c67a30b906c447375ed2021-10-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/21/11973https://doaj.org/toc/2071-1050Biochar is often used for the removal of phosphorus in wastewater. However, the improper treatment of adsorbed biochar might cause secondary pollution. In order to promote the recycling and harmless utilization of biochar with adsorbed phosphorus, a new modified biochar (ABC) was prepared from cyanobacteria in this study. The maximum adsorption capacity of ABC calculated from the Langmuir isotherm model was 38.17 mg·g<sup>−1</sup>. ABC was used to absorb phosphorus in wastewater, whose product (ABC/P) was used for soil improvement and soybean cultivation. The results showed that adding the proper amount of ABC/P could significantly increase the pH of the soil (from 6.52 ± 0.04 to 7.49 ± 0.08), organic matter content (from 34.02 ± 0.41 to 47.05 ± 0.14 g·kg<sup>−1</sup>), cation exchange capacity (from 3.01 ± 0.18 to 3.76 ± 0.07 cmol·kg<sup>−1</sup>), water-holding capacity (from 28.78 ± 0.34 to 35.03 ± 0.31%), effective phosphorus content, and total phosphorus content. Meanwhile, the soil alkaline phosphatase activity was improved. The plant height, root length, and fresh quality were promoted by planting soybeans in ABC/P-improved soil and were better than those of the control group. Therefore, ABC/P, as a new type of phosphorus fertilizer, has the potential for soil amendment for legume crops.Yan-Ning LiuLi-Yuan HeMDPI AGarticlecyanobacteriaalkali-activated algae biocharsoil amendmentphosphorussoybean cultivationEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 11973, p 11973 (2021) |
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DOAJ |
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EN |
| topic |
cyanobacteria alkali-activated algae biochar soil amendment phosphorus soybean cultivation Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 |
| spellingShingle |
cyanobacteria alkali-activated algae biochar soil amendment phosphorus soybean cultivation Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Yan-Ning Liu Li-Yuan He Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| description |
Biochar is often used for the removal of phosphorus in wastewater. However, the improper treatment of adsorbed biochar might cause secondary pollution. In order to promote the recycling and harmless utilization of biochar with adsorbed phosphorus, a new modified biochar (ABC) was prepared from cyanobacteria in this study. The maximum adsorption capacity of ABC calculated from the Langmuir isotherm model was 38.17 mg·g<sup>−1</sup>. ABC was used to absorb phosphorus in wastewater, whose product (ABC/P) was used for soil improvement and soybean cultivation. The results showed that adding the proper amount of ABC/P could significantly increase the pH of the soil (from 6.52 ± 0.04 to 7.49 ± 0.08), organic matter content (from 34.02 ± 0.41 to 47.05 ± 0.14 g·kg<sup>−1</sup>), cation exchange capacity (from 3.01 ± 0.18 to 3.76 ± 0.07 cmol·kg<sup>−1</sup>), water-holding capacity (from 28.78 ± 0.34 to 35.03 ± 0.31%), effective phosphorus content, and total phosphorus content. Meanwhile, the soil alkaline phosphatase activity was improved. The plant height, root length, and fresh quality were promoted by planting soybeans in ABC/P-improved soil and were better than those of the control group. Therefore, ABC/P, as a new type of phosphorus fertilizer, has the potential for soil amendment for legume crops. |
| format |
article |
| author |
Yan-Ning Liu Li-Yuan He |
| author_facet |
Yan-Ning Liu Li-Yuan He |
| author_sort |
Yan-Ning Liu |
| title |
Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| title_short |
Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| title_full |
Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| title_fullStr |
Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| title_full_unstemmed |
Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism |
| title_sort |
effects of alkali-activated algae biochar on soil improvement after phosphorus absorption: efficiency and mechanism |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/4e7d5b583fb54c67a30b906c447375ed |
| work_keys_str_mv |
AT yanningliu effectsofalkaliactivatedalgaebiocharonsoilimprovementafterphosphorusabsorptionefficiencyandmechanism AT liyuanhe effectsofalkaliactivatedalgaebiocharonsoilimprovementafterphosphorusabsorptionefficiencyandmechanism |
| _version_ |
1718431464067956736 |