Chemical Engineering Department, Khalifa University of Science and Technology, Masdar City Campus, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
Chemistry Department, Khalifa University of Science and Technology, Masdar City Campus, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
J Environ Manage. 2019 Nov 15;250:109465. doi: 10.1016/j.jenvman.2019.109465. Epub 2019 Aug 30.
Bio-based sorbents are preferred over chemical-based methods for the clean-up of crude oil spills in marine environments because bio-based sorbents are more environmentally friendly. This study evaluates the use of peat-derived biochar (PB) as a bio-sorbent for the sorption and removal of crude oil spills from synthetic seawater. Experiments were designed to determine the effect of four operating factors (PB/crude oil contact time, PB dosage, oil dosage, and temperature) on two performance indicators (crude oil sorption capacity of PB, S, and oil removal efficiency, R%). Regression models containing linear, quadratic, and two-way interaction terms were developed to predict S and R% from the four factors. Response surface methodology (RSM) was employed to identify the optimum conditions for the sorption and removal of crude oil from seawater. The performance indicators were predicted with a high degree of accuracy, i.e. with coefficient of determination (R) values exceeding 90%. The optimum values of S and R% were estimated to be 32.5 g of crude oil/g of sorbent and 91.2% respectively. These optimum values were attained after 70 min of PB/crude oil contact time and at a temperature of 45 °C. The spent sorbent maintained its performance after three cycles of regeneration and reuse, suggesting that the material is reusable.
生物基吸附剂因其环境友好性优于化学基方法，因此更适合用于海洋环境中原油泄漏的清理。本研究评估了泥炭衍生生物炭 (PB) 作为生物吸附剂，用于从合成海水中吸附和去除原油泄漏物。实验设计用于确定四个操作因素（PB/原油接触时间、PB 用量、油用量和温度）对两个性能指标（PB 对原油的吸附容量 S 和除油效率 R%）的影响。开发了包含线性、二次和双向交互项的回归模型，以从四个因素预测 S 和 R%。采用响应面法 (RSM) 确定从海水中吸附和去除原油的最佳条件。性能指标的预测具有很高的准确性，即决定系数 (R) 值超过 90%。S 和 R%的最佳值估计分别为 32.5 g 原油/g 吸附剂和 91.2%。在 PB/原油接触时间为 70 分钟且温度为 45°C 时达到这些最佳值。经过三次再生和重复使用循环后，废吸附剂仍保持其性能，表明该材料可重复使用。
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