在固体废弃物和污泥热解中稳定重金属,采用间隔-剥皮改性米化物
Yuxuan Yang1, Zhaoping Zhong1, Baosheng Jin1
1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
Journal of environmental management
|March 27, 2024
概括
改性白石有效地控制了废物热解过程中重金属的释放. 八甲基三甲化物修饰的甲 (STAB-800) 显示出最佳性能,降低了来自Cd,Cr,Cu,Zn和Pb的风险.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 固体废物和污泥产生给环境带来了重大挑战.
- 热解可以减少体积,但受到重金属污染的阻碍.
- 控制重金属的排放对于可持续的废物管理至关重要.
研究的目的:
- 研究在废物热解过程中对重金属进行控制时使用干脱皮改性白石 (IEMV).
- 为了确定最有效的IEMV配方用于重金属的保留.
- 评估重金属在热解后对环境的风险,了解反应机制.
主要方法:
- 使用各种表面活性剂 (二甲基硫酸盐,六甲基三甲基化,八甲基三甲基化) 合成IEMV.
- 使用IEMV添加剂对污泥和固体废物进行热解实验.
- 重金属分析 (Cd, Cr, Cu, Zn, Pb) 和风险评估.
- 计算模拟 (反应场所,福井函数,边界分子轨道) 以阐明反应机制.
主要成果:
- IEMV有效控制了重金属的释放,比固体废物更好地保留在污泥中.
- 经过800°C加热的八甲基三甲基化 (STAB-800) 修改的IEMV显示出优异的重金属保留,特别是Cr,Cu和Zn.
- 风险评估表明Cr,Cu,Zn和Pb的风险较低,但在特定条件下Cd的风险相当大.
- 计算分析揭示了热激活间接脱皮改性白岩 (T-IEMV) 的增强反应性,并确定了Mg和O原子作为关键反应点.
结论:
- STAB-800是一种高效的添加剂,可减轻废物热解产生的重金属污染.
- 在使用 STAB-800 时,温度升高有利于重金属危险降低.
- T-IEMV对重金属具有卓越的吸附能力,为废物管理和污染控制提供了一种新的方法.
更多相关视频
05:52Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
Published on: June 2, 2022
2.9K
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
9.7K
相关概念视频
Extraction: Advanced Methods
446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
Voltammetry: Stripping Methods
214
Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
214
