School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
School of Environment, Harbin Institute of Technology, Harbin, 150090, China; College of Resources and Environment, University of Chinese Academy of Sciences (UCAS), Beijing, 100049, China.
Environ Pollut. 2023 Jan 1;316(Pt 1):120508. doi: 10.1016/j.envpol.2022.120508. Epub 2022 Oct 25.
The penicillin industry produces a large amount of penicillin mycelial dreg (PMD), potentially causing severe environmental problems without proper treatment and disposal. To achieve the goals of PMD management, the present work explored the potential of PMD as a novel feedstock to produce biochar with very high adsorption performance. PMD was pyrolyzed at 400-800 °C to prepare biochars (PMD-BCs), and the physical and chemical properties were characterized using various methods. The adsorption capacities of Pb on PMD-BC400, PMD-BC600, and PMD-BC800 were 37.04, 62.89, and 107.53 mg/g, respectively, at a temperature of 25 °C and pH of 5.0. The adsorption process of Pb on PMD-BCs can be well described by the Langmuir model and pseudo-second-order model. Mineral precipitation, ion exchange, functional group complexation and Pb-π interaction were involved in the adsorption of Pb on PMD-BCs. Moreover, mineral precipitation and ion exchange dominated Pb sorption on PMD-BCs (84.71-92.73%). This study indicates the transition of PMD to biochar for Pb adsorption is a promising method for PMD utilization.
青霉素工业产生大量的青霉素菌丝废渣（PMD），如果处理和处置不当，可能会造成严重的环境问题。为了实现 PMD 管理目标，本研究探讨了 PMD 作为一种新型原料生产具有高吸附性能生物炭的潜力。PMD 在 400-800°C 下热解制备生物炭（PMD-BC），并采用多种方法对其物理化学性质进行了表征。在 25°C 和 pH 值为 5.0 的条件下，PMD-BC400、PMD-BC600 和 PMD-BC800 对 Pb 的吸附容量分别为 37.04、62.89 和 107.53mg/g。Pb 在 PMD-BCs 上的吸附过程可以很好地用 Langmuir 模型和拟二级模型描述。Pb 在 PMD-BCs 上的吸附涉及矿物沉淀、离子交换、官能团络合和 Pb-π 相互作用。此外，矿物沉淀和离子交换主导了 PMD-BCs 对 Pb 的吸附（84.71-92.73%）。本研究表明，PMD 向生物炭的转化用于 Pb 吸附是 PMD 利用的一种很有前途的方法。
