从土中减少合体释放:微/纳米尺寸生物炭和间歇性无氧状态的协同效应
Junwei Jin1, Yunying Fang2, Chunlong Liu3
1Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China.
The Science of the total environment
|September 17, 2023
概括
间歇性无氧条件和生物炭的应用显著减少了在土中释放的合 (CP). 纳米尺寸的生物炭与较长的无氧期相结合,显示了最大的CP损失减少.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 农业管理 农业管理
背景情况:
- 体 (CP) 具有很高的流动性,在农业系统中存在损失的风险.
- 农业实践,如氧化还原振荡和生物炭修正影响CP生物地化学循环.
研究的目的:
- 研究氧气状况和生物炭修改对土释放的合的相互作用作用.
- 在各种处理下量化孔水中的CP度,土壤P物种和P吸附能力.
主要方法:
- 在不同氧气条件下 (连续无氧/无氧,间歇无氧) 和生物炭处理 (散装,微型,纳米尺寸) 下,在孔水和土壤P物种中监测CP度.
- 评估 P 土壤的吸附能力.
- 评估了氧气状态 (IA2-10) 和生物炭类型 (SBBulk,SBMicro,SBNano) 对CP释放的相互作用影响.
主要成果:
- 与持续无氧控制 (CK-CA) 相比,间歇性无氧治疗 (CK-IA) 将 CP 降低了 45%,这归因于增加的 Eh, pH 和 P 吸附.
- 生物炭修正 (SB-CA) 由于土壤pH,Eh和吸附能力升高,导致CP释放减少了37%与CK-CA相比.
- 联合治疗 (SB-IA) 与CK-CA相比,协同减少了68%的CP释放,通过与土壤成分的相互作用增强了吸附.
结论:
- 间歇性无氧条件和生物炭的应用是缓解在米土壤中的合损失的有效策略.
- 纳米尺寸的生物炭与延长的间歇性无氧持续时间相结合,表明CP释放的最显著减少.
- 管理实践应考虑优化氧化还原条件和利用适当的生物炭类型来改善保留.
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