Mineral-enriched biochar produced from metal-cutting fluid sludge delivers enhanced phosphate recovery
Mineral-enriched biochar produced from metal-cutting fluid sludge delivers enhanced phosphate recovery
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DOI：
10.1016/j.cscee.2023.100602
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发表时间：
2023-12
影响因子：
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通讯作者：
Guidan Zhu;Xingdong Wang;Kai Chen;Jie Shan;Hehua Zeng
中科院分区：
文献类型：
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作者：
Guidan Zhu;Xingdong Wang;Kai Chen;Jie Shan;Hehua Zeng
通过富含矿物质的生物炭回收磷酸盐引起了广泛的关注，但调查吸收的研究有限。在这项研究中，我们通过在不同温度（500、600和700 °C）下热解金属切削液污泥（MCFS）的一步过程制备了新型富Al/Fe生物炭，以促进从水溶液中回收磷酸盐。研究结果表明，MCFS基生物炭富含矿物金属氧化物，具有发达的孔结构，显着的表面积，和功能基团，所有这些都有助于创造磷酸盐吸附的活性位点。Langmuir吸附模型表明MCFS-500对水溶液中的磷酸盐具有良好的吸附性能，吸附容量为92.58 mg P/g。生物炭中存在的铁和铝的氢氧化物和氧化物在磷吸附过程中起着重要作用。总的来说，MCFS衍生的生物炭提供了一种具有成本效益和可行的磷回收方法，为MCFS的安全处置和从废水中回收磷酸盐引入了一种创新方法。
Phosphate recovery via mineral-enriched biochar has attracted widespread attention, but studies investigating the uptake are limited. In this study, we prepared novel Al/Fe-rich biochars by a one-step process of pyrolyzing metal-cutting fluid sludge (MCFS) at various temperatures (500, 600, and 700 °C) to facilitate phosphate recovery from aqueous solutions. The findings revealed that the MCFS-based biochar was rich in mineral metal oxides and possessed a well-developed pore structure, significant surface area, and functional groups, all of which contributed to the creation of active sites for phosphate adsorption. The Langmuir model revealed that MCFS-500 efficiently adsorbed phosphate from aqueous solutions, demonstrating an outstanding sorption capacity of 92.58 mg P/g. The Fe and Al hydroxides and oxides present within biochar play significant roles in the phosphate adsorption process. Overall, the MCFS-derived biochar presents a cost-effective and feasible method for phosphorus recovery, introducing an innovative approach for both the secure disposal of MCFS and the recovery of phosphate from wastewater.