| Title: | Application of crop straw derived biochars to Cu(II) contaminated Ultisol: evaluating role of alkali and organic functional groups in Cu(II) immobilization |
| Address: | "State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China" |
| DOI: | 10.1016/j.biortech.2013.01.161 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "When Cu(II) contaminated Ultisol was mixed with biochar derived from straw and incubated for 120 d, acid-soluble Cu(II) decreased by 0.08-0.33 mmol/kg due to the liming effect of biochar; 1.00-1.93 mmol/kg due to organic functional groups of biochar when it was added to the soil at 30 g/kg, and by 1.40-2.43 mmol/kg at 50 g/kg. The total functional groups and volatile matter (VM) were significantly related to Cu(II) immobilization (P<0.01), suggesting that it is functional groups in VM that are essential to Cu(II) immobilization in soil. The percentage of acid soluble Cu(II) decreased from 43.07% for the control, to 18.83-27.45% and 11.03-20.97% for the treatments with 30 and 50 g/kg of crop straw biochars added, respectively. The immobilized Cu(II) was primarily transformed to reducible and oxidizable forms. Biochar could retain Cu(II) for at least 120 d, indicating the long-term stability of biochar in Cu(II) immobilization" |
| Keywords: | "Alkalies/*chemistry Calcium Compounds/chemistry Charcoal/*chemistry Copper/*isolation & purification Crops, Agricultural/*chemistry Hydrogen-Ion Concentration Organic Chemicals/*chemistry Oxides/chemistry Soil/*chemistry Soil Pollutants/*isolation & purif;" |
| Notes: | "MedlineJiang, Jun Xu, Ren-kou eng Research Support, Non-U.S. Gov't England 2013/03/05 Bioresour Technol. 2013 Apr; 133:537-45. doi: 10.1016/j.biortech.2013.01.161. Epub 2013 Feb 6" |
