不同来源溶解性有机物对磺胺甲恶唑在生物炭上吸附的影响。
Sorption of sulfamethazine to biochars as affected by dissolved organic matters of different origin.
机构信息
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210008, PR China.
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
出版信息
Bioresour Technol. 2018 Jan;248(Pt B):36-43. doi: 10.1016/j.biortech.2017.08.082. Epub 2017 Aug 30.
Sorption characteristic of sulfamethazine (SMT) to straw biochars pyrolyzed at 300°C (BC300) and 600°C (BC600), and the effect of ubiquitous DOM were investigated. Results showed that physisorption (partition) and weak chemical binding (π-π EDA interaction) dominated the sorption of SMT to BC300 and BC600, respectively. Graphene sheets in biochar played important roles in the sorption of SMT, leading to higher sorption capacity (K) on BC600 (1.77mgLg) than BC300 (0.11mgLg). Sorption amount of SMT to BC300 was not affected by polysaccharide and malic acid, while it was slightly promoted by citric acid, but dramatically increased 1.25 times by methacrylic acid through decreasing solution pH and providing new sorption sites. Humic acid and bovine serum albumin restrained the sorption of SMT to BC600, but enhanced SMT adsorption to BC300. The chemical nature of DOM, biochar properties and antibiotic species co-determined the impact of DOM on antibiotics adsorption.
研究了腐殖酸（DOM）对 300°C（BC300）和 600°C（BC600）热解秸秆生物炭吸附磺胺甲恶唑（SMT）的吸附特性及影响。结果表明，SMT 对 BC300 和 BC600 的吸附主要受物理吸附（分配）和弱化学结合（π-π EDA 相互作用）的影响。生物炭中的石墨烯片在 SMT 的吸附中起重要作用，导致 SMT 在 BC600 上的吸附容量（K）更高（1.77mgLg），而在 BC300 上的吸附容量（K）较低（0.11mgLg）。多糖和苹果酸对 SMT 吸附到 BC300 上的影响不大，而柠檬酸则略微促进了 SMT 的吸附，但通过降低溶液 pH 值和提供新的吸附位点，甲丙烯酸将 SMT 的吸附量增加了 1.25 倍。腐殖酸和牛血清白蛋白抑制了 SMT 对 BC600 的吸附，但增强了 SMT 对 BC300 的吸附。DOM 的化学性质、生物炭特性和抗生素种类共同决定了 DOM 对抗生素吸附的影响。
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