尿素修正案将碳化合物污染的南极土壤中的化脱
Eden Zhang1, Daniel Wilkins2, Sally Crane1
1School of Biotechnology and Biomolecular Sciences, UNSW Sydney, NSW, 2052, Australia; Evolution and Ecology Research Centre, UNSW Sydney, 2052, Australia.
Chemosphere
|March 15, 2024
概括
南极生物中的尿素肥料增加了土壤酸盐,损害了有益的细菌. 酸为碳化合物整治提供了更好的替代方案,而不会产生有害的酸积累.
科学领域:
- 环境微生物学 环境微生物学
- 土壤生物修复 土壤生物修复
- 极地科学 极地科学
背景情况:
- 极地地区的碳化合物污染威胁着生态系统.
- 工程生物有效地修复了南极洲受污染的土壤.
- 尿素肥在帮助生物修复的同时,增加了土壤的pH值,和化物.
研究的目的:
- 调查持续酸盐积累对南极生物中的化者社区的影响.
- 了解亚酸盐含量,土壤化学和化剂丰度之间的关系.
- 为了确定替代生物刺激剂,以防止酸盐的积累.
主要方法:
- 对南极生物的现场监测.
- 安普利康测序用于评估微生物群落.
- 在现场样本上进行微流体定量PCR (qPCR).
- 在控制温度 (7°C和15°C) 的实验室土壤微观世界.
主要成果:
- 在用尿素修改的生物中观察到持续高的亚酸盐水平 (高达76±57毫克N/kg).
- 低酸与氨氧化细菌 (AOB) 的比率 (<1:1) 与Nitrobacter抑制和酸盐积累相关.
- 在实验室的微观宇宙中,在7°C的温度下,在现场生物中复制了酸盐的积累.
- 酸修改防止了亚酸盐的积累.
结论:
- 在寒冷的,性南极土壤中以尿素为基础的施肥可以通过抑制关键的化细菌,导致有害的酸盐积累.
- 酸盐氧化细菌 (NOB) 与AOB的比例对于管理酸盐水平至关重要.
- 酸是南极土壤生物修复的有希望的替代生物刺激剂,避免过度酸盐的积累.
相关概念视频
Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
Comparative Excretory Systems
19.3K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
19.3K
The Nitrogen Cycle
52.1K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
52.1K
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.2K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.2K
Bioremediation
18.3K
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.
18.3K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.3K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.3K


