Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, 264003, China.
Shandong Provincial Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, 264003, China.
Bull Environ Contam Toxicol. 2019 Jul;103(1):169-174. doi: 10.1007/s00128-018-2392-7. Epub 2018 Jul 7.
The dissolved organic matter (DOM) samples from biochars produced from Jerusalem artichoke stalks by pyrolysis at 300, 500, and 700 °C were characterized using a combination of spectroscopic techniques. Additionally, the binding affinities (long K) and the complexation capacities (C) of the DOM samples with Cu(II) were calculated to assess their Cu binding properties. The biochar-borne DOM contained mainly humic-like components (C1-C3) with a small amount of a protein-like component (C4). As the charring temperature increased, the concentrations of released DOM decreased. The low temperature biochar-borne DOM was found to have more carboxyl groups than its high temperature counterparts, and thus it had larger C values. In contrast, the high temperature biochar-borne DOM had larger long K values. Low temperature biochars, if applied in a large quantity, would alter copper mobility in the environment because of their high DOM contents and large copper binding capacities.
采用光谱技术组合，对 300、500 和 700°C 热解生产的菊芋梗生物炭中溶解的有机物质（DOM）样品进行了表征。此外，还计算了 DOM 样品与 Cu(II) 的结合亲和力（长 K）和络合容量（C），以评估它们的 Cu 结合特性。生物炭携带的 DOM 主要含有腐殖质样成分（C1-C3），少量蛋白样成分（C4）。随着炭化温度的升高，释放的 DOM 浓度降低。研究发现，低温生物炭携带的 DOM 比高温生物炭携带的 DOM 具有更多的羧基，因此 C 值更大。相比之下，高温生物炭携带的 DOM 具有更大的长 K 值。如果大量应用低温生物炭，由于其 DOM 含量高和铜结合容量大，可能会改变环境中铜的迁移性。
