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石膏/石膏合用于增强生物炭固定:矿化反应行为和电子转移效应

Ziqi Guo¹, Chaonan Zhang¹, Hanfeng Jiang¹

¹School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.

Journal of environmental management

|August 23, 2023

概括

将生物炭与石膏 (PG) 或石膏 (TG) 结合起来,有效地使 (Pb2+) 不动,从而达到高的去除率. 这种新的方法利用废物材料进行高效和稳定的整治.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
地质化学地质化学

背景情况:

(Pb2+) 污染对全球环境和健康构成重大风险.
石膏 (PG) 和石膏 (TG) 由于分散和吸附能力差,作为独立的重金属吸附剂的有效性有限.
来自大米皮 (BC) 的生物炭提供了优异的孔隙性和电子转移特性,有利于重金属稳定.

研究的目的:

用与PG/TG结合的米生物炭来研究Pb2+吸附和固定的机制.
评估矿物质形成和电子转移在Pb2+稳定中的作用.
评估这种复合材料在回收和废物回收方面的潜力.

主要方法:

用PG和TG制备生物炭 (BC) 和其复合物.
吸附实验以确定Pb2+去除速率和动力学.
矿物学分析以确定Pb矿物形成.
通过四步提取量化Pb2+生物可用性.

主要成果:

BC/PG和BC/TG复合材料实现了高的Pb2+去除率97%-98%,显著提高了BC的性能.
Pb2+固定主要是由PG/TG诱导的稳定Pb-硫酸盐和Pb-酸盐矿物质的形成驱动的.
非生物可访问的Pb形式的比例超过了50%,表明有效的稳定.
生物炭的多孔结构促进了PG/TG分散和Pb2+沉,而其导电性提高了矿化速率.
在PG/TG中的 (P) 和 (F) 对于将Pb矿物转化为 pyromorphite至关重要.

结论:

生物炭与PG/TG的结合是Pb2+修复的高效策略.
这种方法利用废物材料 (生物炭,PG,TG) 来同时利用废物和环境清洁.
稳定,非生物可访问的Pb矿物质的增强形成是固定的关键机制.
生物炭结构的协同效应和PG/TG的矿物诱导特性为控制污染提供了一个有希望的解决方案.

关键词:

生物炭是一种生物炭.电子转移是指电子的转移.工业固体废物工业固体废物领导领导领导领导领导固化和稳定固化和稳定

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