从尿液等效溶液中回收酸盐,用于用于植物生长的肥料生产
Marina Avena Maia1, Olaf Prosper Kranse2, Sebastian Eves-van den Akker2
1Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, U.K.
ACS sustainable chemistry & engineering
|November 29, 2023
概括
这项研究使用铁层双氧化物 (LDH) 从废水中回收酸盐. 回收的酸盐有效地作为肥料,促进循环经济和可持续的资源管理.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 可持续工程 可持续工程
背景情况:
- 集中式废水处理厂产生高度稀释的酸盐流 (<10 ppm).
- 分散的废水系统提供缩酸盐流 (~500 ppm),适合回收.
- 从废水中回收酸盐符合循环经济原则.
研究的目的:
- 为了证明从缩水溶液中恢复酸盐的可行性.
- 为了评估Mg-Fe层状双氧化物 (LDH) 作为酸盐吸附剂和肥料前体.
- 评估吸附剂在半连续工艺中的可回收性.
主要方法:
- 利用Mg-Fe层状双氧化物 (LDH) 来从模拟废水中吸附酸盐.
- 研究了酸盐吸附机制,包括表面复杂化和静电吸引.
- 执行连续的吸附/脱附周期,以评估吸附剂的稳定性和可回收性.
- 在植物生长介质中测试了回收的酸盐作为肥料.
主要成果:
- -Fe LDH有效地从高度溶液 (∼500 ppm) 中吸附酸盐.
- 吸附通过表面复合和静电吸引的组合发生.
- 这种LDH吸附剂在多个吸附/脱附周期中表现出稳定性和可回收性.
- 回收的酸盐成功地增强了缺乏媒介的植物生长.
结论:
- 从缩废水流中恢复酸盐是可行的,使用Mg-Fe LDH.
- 回收的酸盐可以有效地用作植物肥料.
- 这个过程通过将废物转化为有价值的资源来支持循环经济.
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