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机械洞察力热解温度依赖的 (Pb) 稳定在植物补救残留物衍生的生物炭中

Jin Liu^1,2, Yangyang Wang¹, Jun Pang³

¹School of Materials and Environmental Engineering, Shenzhen Polytechnic University, Shenzhen, China.

Frontiers in chemistry

|November 28, 2025

概括

用丰富的生物质 (BM_Pb) 转化为生物炭 (BC_Pb) 的热解有效地使不动,降低了其生物可用性. 500°C以上的温度是安全的残留物管理的最佳温度,最大限度地减少土壤和水中的生态风险.

科学领域:

环境科学环境科学
生物地质化学生物地质化学
材料科学材料科学材料科学

背景情况:

来自植物修复的金属污染生物质残留物构成二次污染的风险.
需要有效的处理解决方案来管理这些危险残留物.
热解提供了一种稳定金属丰富生物质的潜在方法.

研究的目的:

评估烧化丰富生物质 (BM_Pb) 对于安全的残留物管理的有效性.
研究在不同温度 (300°C-700°C) 中产生的生物炭 (BC_Pb) 中的的固定机制和稳定性.
在不同的环境条件下,评估生物炭中的生态风险.

主要方法:

在300°C至700°C的温度下,丰富生物质 (BM_Pb) 的热解.
要素分析和顺序提取 (BCR) 确定的物种化和生物可用性.
泄漏试验和土壤模拟实验,以评估的流动性和生态风险.

主要成果:

热解显著减少了生物质体积,并有效地固定了生物炭中的 (BC_Pb).
稳定机制因温度而异,涉及降水和稳定的矿物阶段的形成.
较高的热解温度 (≥500°C) 显著降低了可变分数 (F1+F2) 和增加了稳定分数 (F3+F4),表明生物可用性降低.
化试验显示,在pH>2时,的释放低于监管值,在较高的热解温度下化减少.
用BC_Pb进行的土壤修正表明,土壤转向更稳定的形式,证实生态风险低.

结论:

在高于500°C的温度下对BM_Pb的热解是处理植物修复残留物的有希望的方法.
由此产生的BC_Pb在典型条件下在水和土壤环境中表现出高稳定性和低生态风险.
在极端酸性条件下,由于潜在的泄漏,建议谨慎管理.

关键词:

生态风险生态风险 (Pb) 的使用.生物修复残留物残留物热解气体温度系统稳定稳定稳定稳定

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