在堆肥中潜在的重金属排毒系统:由贝粉末介导的生物和非生物协同作用
Liangcai Ma1, Yucheng Zhou1, Ao Wang1
1School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Bioresource technology
|July 28, 2023
概括
贝粉添加有效降低重金属的生物可用性,并增强重金属耐药基因 (HMRGs) 调节在奶肥堆肥. 这一策略有助于重金属排毒,并支持动氨酸菌的耐药性.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 土壤科学 土壤科学
背景情况:
- 重金属耐药细菌 (HMRB) 中的重金属耐药基因 (HMRG) 对于应对堆肥中的金属压力至关重要.
- 了解堆肥过程中重金属排毒机制对于环境修复至关重要.
研究的目的:
- 调查贝粉 (SP) 在乳制品便堆肥过程中重金属排毒中的作用.
- 分析SP对重金属生物可用性,HMRB和HMRG的影响.
- 探索酸 (HA) 和重金属生物可用性之间的关系.
主要方法:
- 用贝粉添加剂对乳制品肥料进行堆肥.
- 测量重金属 (Zn,Cu,Mn) 的生物可用性.
- 对湿性物质 (HS) 组成的分析,重点是湿性酸 (HA).
- 评估重金属耐药细菌 (HMRB) 和重金属耐药基因 (HMRG) 的表达.
- 变量之间的相关性分析.
主要成果:
- 贝粉显著降低了 Zn,Cu 和 Mn 的生物可用性.
- SP增加了 humus (HS) 中的 humic 酸 (HA) 含量 8%.
- SP增强了Actinobacteria对重金属的抵抗力,并改善了HMRGs的监管.
- 重金属的生物利用性与大多数HMRG正相关.
- HA与 Zn,Cu 和 Mn 的生物可用性有负相关性.
结论:
- 贝粉是堆肥中重金属排毒的有希望的添加剂.
- SP改善了HMRG的调节,并增强了微生物对重金属的抵抗力.
- 由SP介导的HA含量增加有助于降低重金属的生物可用性.
相关概念视频
Bioremediation
19.0K
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.
19.0K
Extraction: Advanced Methods
488
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...
488
Coagulation
331
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
331
Enhanced Elimination of Poison
540
Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
540
Metabolism of Chemolithotrophs
47
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
47
Environmental Applications of Microorganisms
61
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...
61


