工业污水污泥衍生生物炭的环境风险和农业效益
Vladimír Frišták1, Lucia Polt'áková1, Gerhard Soja2
1Department of Chemistry, University of Trnava, Trnava, Slovakia.
PeerJ
|December 17, 2024
概括
热化学处理的污水污泥 (生物炭) 显示出作为土壤添加剂的潜力. 虽然增加了重金属度,但它减少了它们的可用性,并没有影响玉米重金属积累.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 蒸厂废水处理厂 (WWTP) 的污泥需要安全处置或回收利用.
- 污水污泥可以通过热化学处理 (热解) 转化为生物炭 (BC).
- 评估BC作为土壤添加剂的生态毒理安全性对于可持续农业至关重要.
研究的目的:
- 评估蒸厂WWTP污泥衍生生物炭 (BC) 作为土壤添加剂的生态毒理安全性.
- 描述污水污泥 (SS) 和BC的物理化学特性.
- 评估BC对土壤特性,微生物群落和玉米 (Zea mays) 中元素生物积累的影响.
主要方法:
- 对SS和BC (pH,EC,Corg,Ninorg,CEC,N,H,灰,PAHs) 的物理化学表征.
- 用土 (Eisenia fetida) 进行生态毒理学测试.
- 用玉米 (Zea mays) 进行盆栽实验,以评估土壤特性,元素积累,以及用 (Lepidium sativum) 进行发芽测试.
主要成果:
- 热解增加了BC的pH,有机碳,和灰含量,同时降低了EC,CEC,H和PAHs.
- 与SS相比,BC显示了较高的Cr,Ni,Pb,Zn和Fe度,但减少了可用的重金属形式.
- 1%BC添加到土壤增加了pH值,降低了EC和Ninorg,对玉米重金属积累或芽没有显著影响.
- 补充BC改变了土壤微生物群落,减少了微生物生物量,增加了真菌物种的变异性.
结论:
- 蒸厂WWTP污泥衍生生物炭 (BC) 是一个有前途的土壤添加剂,具有改善的物理化学特性和减少重金属的可用性.
- 1%的BC应用表明生态毒理安全性,涉及到玉米和发芽中的重金属吸收.
- 建议进一步优化热解过程,以最大限度地发挥BC作为土壤修补剂和营养来源的潜力.
相关概念视频
Environmental Applications of Microorganisms
1
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
1
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
Microorganisms in Agriculture and Food industry
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...


