相关实验视频

Updated: May 21, 2025

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

微塑料对垃圾填埋场浸物和区硫酸盐减少的影响

Nan Zhang¹, Dongsheng Shen¹, Chengran Fang²

¹Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.

Journal of hazardous materials

|March 19, 2025

概括

微塑料 (MPs) 显著影响垃圾填埋场硫酸盐的减少,聚乳酸 (PLA) 导致硫化 (H2S) 的强烈释放,特别是在更高的温度下. MP类型是异样化硫酸盐减少 (DSR) 的主要驱动因素,而温度则影响同样化硫酸盐减少 (ASR).

科学领域:

环境科学环境科学
微生物学微生物学
地质化学地质化学

背景情况:

填埋场液和区是复杂的环境,微塑料 (MP) 污染日益令人担忧.
在垃圾填埋场的硫酸盐减少过程可以导致有害气体的释放,如硫化 (H2S).
不同的MP类型和不同温度对这些微生物过程的影响仍然不完全理解.

研究的目的:

研究不同类型的微塑料 (聚乳酸 (PLA),聚烯 (PS),聚乙烯 (PE),聚乙烯 (PVC)) 对硫酸盐还原行为的影响.
确定不同温度对微塑料受影响的硫酸盐减少的影响,模拟垃圾填埋条件.
阐明硫化 (H2S) 释放背后的机制以及化 (DSR) 和同化 (ASR) 硫酸盐减少的作用.

主要方法:

在受控温度条件下 (25°C,35°C,45°C,55°C) 模拟填埋场浸出物和区域的实验设置.
在实验系统中引入不同类型的微塑料 (PLA,PS,PE,PVC).
对硫化 (H2S) 释放的监测和对DSR和ASR过程的功能基因丰富的分析.

主要成果:

聚乳酸 (PLA) 显著增强了H2S的释放,随着温度的增加,累积释放量大大增加 (例如,在55°C和25°C时33.2倍).
微塑料类型是影响异样硫酸盐减少 (DSR) 的主要因素,PLA促进了DSR功能基因和H2S生产.
温度是同化硫酸盐降解 (ASR) 的主要驱动因素,随着温度升高,其缩能力下降;在PLA的影响下,主导的硫酸盐降解细菌属随着温度的变化而变化.

结论:

微塑料类型,特别是PLA,在加剧垃圾填埋场中的H2S释放方面发挥着关键作用.
在源头控制微塑料污染对于减轻显著的H2S排放和相关环境风险至关重要.
了解微塑料和温度之间的相互作用对于有效的垃圾填埋管理和污染控制战略至关重要.

关键词:

在垃圾填埋场填埋垃圾.溶解液是一种溶解液.微塑料是一种微塑料.减少硫酸盐的减少温度温度是指温度.

更多相关视频

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

相关概念视频

The Sulfur Cycle

The Sulfur Cycle

Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...

Bioremediation

Bioremediation

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.