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在城市固体废物堆肥中加强重金属整治的生物酸盐辅助浸出

Srishti Khare¹, Anupam Singhal¹, Srinivas Rallapalli^2,3

¹Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan, India.

Scientific reports

|June 20, 2024

概括

这项研究使用L-glutamic acid,N,N-diacetic acid (GLDA) 来从城市固体废物 (MSW) 堆肥中去除有毒重金属. 该过程实现了高清除率,为MSW整治和循环经济应用提供了可持续的解决方案.

科学领域:

环境科学环境科学
绿色化学绿色化学
废物管理废物管理

背景情况:

城市固体废物 (MSW) 堆肥通常含有有毒重金属,阻碍其使用和处置.
像EDTA这样的常规合剂是不可生物降解的,对环境构成风险.
开发用于堆肥中重金属修复的可持续方法对于循环经济至关重要.

研究的目的:

开发和优化一种使用可生物降解的化剂L-glutamic acid,N,N-diacetic acid (GLDA) 的新型整治工艺,用于MSW堆肥中的重金属.
为了比较GLDA与传统化剂EDTA的效率.
评估GLDA处理对重金属流动性,毒性和生物可用性的影响.

主要方法:

使用植物性生物降解化剂GLDA用于重金属修复.
使用响应表面方法优化处理变量 (GLDA度,pH,保留时间).
进行了与EDTA的比较评估,并分析了水后的地化学分数.

主要成果:

在最佳条件下 (150毫米GLDA,pH2.9,120分钟) 实现了高的去除效率:Cd (90.32%),Cu (81.96%),Pb (91.62%),Zn (80.34%).
补救过程遵循了伪二阶动力学.
GLDA辅助水改变了重金属的分布,Cd,Cu和Pb显示出潜在的重新调动,而Zn则集成到堆肥矩阵中.

结论:

GLDA辅助浸出是一种有效和可持续的方法,用于从MSW堆肥中修复重金属.
该过程为工业应用 (如肥料和生物能源) 提供了可行的替代方案,促进循环经济.
该战略有助于减少废物,城市景观设计和碳捕获,控制环境足迹.

关键词:

可生物降解的化剂.循环经济是一个循环经济.堆肥堆肥是为了堆肥.重金属的去除重金属的去除.优化优化优化优化

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