期刊
BIORESOURCE TECHNOLOGY
卷 317, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.124011
关键词
Ragweed; Horseweed; Pyrolysis; Heavy metal; Adsorbent
资金
- National Natural Science Foundation of China [41877096, 41877097]
- research on ecological restoration technologies of continuously mono-cropped ginseng based on soil quality assessment [20190304022YY]
- funds for the Central Universities [KYZ201713]
Global expansion of invasive plant species has caused serious ecological and economic problems. Two such invasive species, ragweed and horseweed, were pyrolyzed at temperatures of 350, 450 and 550 degrees C for biochar production (RB350, RB450, RB550 and HB350, HB450, HB550). The biochars produced were used for Cd(II) and Pb(II) removal in aqueous solutions. The results indicated that the properties of the biochars varied with pyrolysis temperature, which further affected their adsorption performance. The maximum adsorption capacity of RB450 for Cd(II) (139 mg.g(-1)) and Pb(II) (358.7 mg.g(-1)) was much higher than that shown in previous studies. The immobilized Cd(II) and Pb(II) fraction on RB450, RB550, HB450 and HB550 was mainly attributable to the acid soluble and non-available fractions. These findings suggested that pyrolysis of invasive plants at 450 degrees C could not only be an option to control invasive plants but also could be of benefit in using biochar as excellent adsorbent.
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