College of Civil Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
College of Construction Engineering, Jilin University, Jilin, 130021, China.
Environ Geochem Health. 2023 Dec;45(12):9599-9619. doi: 10.1007/s10653-023-01756-9. Epub 2023 Sep 30.
Groundwater pollution caused by lead ions has become a widespread issue worldwide due to the ever-increasing development of industrial activities. Such pollution poses significant threats to both humans and the environment. Oyster shell powder-peanut shell biochar mixture (OSP-PSB mixture) was used for lead-contaminated groundwater treatment by permeable reactive barrier (PRB) technology. Basic characteristics of materials proved that OSP-PSB mixture has good adsorption properties; OSP with particle sizes ranging from 0.85 to 1.18 mm was used in this research; according to engineering and adsorption characteristics, OSP-PSB mixture (5:1) showed excellent permeability (4.35 × 10 cm/s) and lead adsorption capacity(27 mg/g); long-term permeability of the OSP-PSB mixture slightly decreased over time and met the permeability requirements for PRB; the removal mechanisms of lead ions by OSP-PSB mixture include precipitation, surface complexation, ion exchange, and physical adsorption. The experiment results showed that the OSP-PSB mixture fulfills the actual project requirements of PRB.
由于工业活动的不断发展，铅离子引起的地下水污染已成为一个全球性的问题。这种污染对人类和环境都构成了重大威胁。牡蛎壳粉-花生壳生物炭混合物（OSP-PSB 混合物）被用于可渗透反应屏障（PRB）技术处理受铅污染的地下水。材料的基本特性证明 OSP-PSB 混合物具有良好的吸附性能；本研究中使用的 OSP 粒径范围为 0.85 至 1.18mm；根据工程和吸附特性，OSP-PSB 混合物（5:1）表现出优异的渗透性（4.35×10cm/s）和铅吸附能力（27mg/g）；随着时间的推移，OSP-PSB 混合物的长期渗透性略有下降，但仍满足 PRB 的渗透性要求；OSP-PSB 混合物去除铅离子的机制包括沉淀、表面络合、离子交换和物理吸附。实验结果表明，OSP-PSB 混合物满足 PRB 实际项目要求。
