使用不同的吸附剂从生物气泥中捕获:吸附和机制
Mingda Li1, Mengfei Li1, Xin Li2
1College of Engineering, China Agricultural University (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), Beijing 100083, China.
概括
生物质发电厂的残留物,特别是BPP渣,有效地从沼气泥中去除. 这种可持续的方法可以防止水污染,并回收有价值的营养素.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 材料科学 材料科学 材料科学
背景情况:
- 生物气泥的应用可能会导致农田污染和水的环保化.
- 从沼气泥中回收对于环境保护和资源利用至关重要.
研究的目的:
- 评估生物炭和生物质发电厂残留物在吸附生物气泥中的可溶的效率.
- 为了确定最佳的吸附剂,并了解吸附机制.
主要方法:
- 使用玉米生物炭 (CSB),桃木生物炭 (CWB),牛生物炭 (CMB),生物质发电厂残留灰 (BPP-ash) 和渣渣 (BPP-slag) 系统评估吸附效率.
- 使用了物理化学表征,动力学和等温分析 (伪二阶,弗洛伊德利希模型) 和X射线衍射 (XRD).
- 定量分析以确定主要吸附机制.
主要成果:
- 生物质发电厂残渣渣 (BPP-slag) 在30克L-1剂量下实现了最高的可溶性去除效率 (92.17%).
- 吸附遵循伪二阶动力学和弗洛因利希等热量,表明化学吸附主导的多层吸附.
- 矿物沉是主要的机制,占总吸附量的70%以上.
结论:
- 生物质发电厂的残留物是有效和经济高效的吸收剂,用于从生物气泥中捕获.
- 这项研究提出了一种可持续的废弃物利用和减轻环境污染的方法.
- BPP渣的高金属氧化物含量 (Ca2+,Mg2+) 有助于其优越的去除能力.
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