期刊
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B
卷 14, 期 12, 页码 1152-1161出版社
ZHEJIANG UNIV
DOI: 10.1631/jzus.B1300102
关键词
Biochar; Nutrient removal; Plant species; Pyrolysis temperature; Water quality
类别
资金
- Ministry of Science and Technology of China [2010DFB33960]
- National Key Technology R&D Program of China [2012BAC17B02]
- Zhejiang Youth Creative Program [2012QNA6004]
- Key Project from Zhejiang Science and Technology Bureau, China [2011C13015]
The study on biochar derived from plant biomass for environmental applications is attracting more and more attention. Twelve sets of biochar were obtained by treating four phytoremediation plants, Salix rosthornii Seemen, Thalia dealbata, Vetiveria zizanioides, and Phragmites sp., sequentially through pyrolysis at 500 A degrees C in a N-2 environment, and under different temperatures (500, 600, and 700 A degrees C) in a CO2 environment. The cation exchange capacity and specific surface area of biochar varied with both plant species and pyrolysis temperature. The magnesium (Mg) content of biochar derived from T. dealbata (TC) was obviously higher than that of the other plant biochars. This biochar also had the highest sorption capacity for phosphate and ammonium. In terms of biomass yields, adsorption capacity, and energy cost, T. dealbata biochar produced at 600 A degrees C (TC600) is the most promising sorbent for removing contaminants (N and P) from aqueous solution. Therefore, T. dealbata appears to be the best candidate for phytoremediation application as its biomass can make a good biochar for environmental cleaning.
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