固体重金属在便衍生生物炭中的稳定机制和长期稳定性
Gabeen Lee1, Se-Eun Jang2, Won-Gune Jeong2
1Department of Environment and Energy & Soil Environment Research Center, Jeonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, Jeollabukdo 54896, Republic of Korea; Department of Science and Environmental Studies, State Key Laboratory in Marine Pollution, The Education University of Hong Kong, Tai Po, New Territories 999077, Hong Kong.
The Science of the total environment
|July 15, 2024
概括
热解有效地稳定了猪中的重金属生物炭,降低了生态风险. 这种生物炭符合安全标准,使其成为一种可行的,长期的肥料替代原肥.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 废物管理 废物管理
背景情况:
- 牲畜便含有重金属,造成生态风险.
- 由肥料制成的生物炭是一种潜在的肥料,但重金属稳定性需要研究.
- 关于肥料生物炭中重金属的长期稳定性和农业适用性的研究有限.
研究的目的:
- 调查猪 pyrolysis 期间重金属稳定机制.
- 评估生物炭内源性重金属的长期稳定性.
- 确定从猪中提取的生物炭作为肥料的农业适用性.
主要方法:
- 在300°C至700°C的温度下对猪的热解.
- 对潜在的生态风险指数和重金属分量的分析.
- 福里埃变换红外光谱学 (FTIR) 和X射线衍射 (XRD) 用于稳定机制.
- 湿干老化周期,以评估长期的可透性.
主要成果:
- 热解温度增加 (300°C至700°C) 显著降低了生态风险指数 (46.3至4.8).
- 在600°C生产的生物炭表现出最佳的稳定性,并符合世界卫生组织对和的植物可用性标准.
- 重金属通过与有机物复合并形成金属酸盐沉物来稳定.
- 生物炭表现出长期的重金属稳定性,在老化后的漏能力低于猪.
结论:
- 热解是一种有效的方法,可以稳定猪中的重金属.
- 从猪中提取的生物炭为农业应用提供了一种安全而稳定的替代原料的替代方案.
- 这项研究证实了氧化肥对环境的威胁降低,并提高了氧化肥的应用性.
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