相关实验视频

Updated: Jul 17, 2025

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

Published on: November 28, 2014

热解温度和生物炭氧化还原活性对沉积物中的的可用性和物种化产生影响

Matheus B Soares¹, Owen W Duckworth², Miroslav Stýblo³

¹Department of Soil Science, Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo (USP), 13418900 Piracicaba, SP, Brazil; Department of Crop and Soil Sciences, North Carolina State University, 27695 Raleigh, NC, USA.

Journal of hazardous materials

|August 28, 2023

概括

生物炭的应用和氧化还原的波动会影响沉积物中的 (As) 行为. 洪水循环可以通过再氧化生物炭来增强As的固定,从而提高其在受污染地点的有效性.

科学领域:

环境科学环境科学
地质化学地质化学
土壤科学土壤科学

背景情况:

生物炭是用于水和土壤整治的成本效益高的材料.
生物炭的有效性受到原料,热解温度和环境条件的影响.
生物炭老化,特别是在波动的湿度下,可以改变其特性和污染物相互作用,如 (As).

研究的目的:

研究热解温度和生物炭应用如何影响氧化还原波动下的释放和沉积物的转化.
了解连续的洪水周期对的物种化和流动性的作用.
评估生物炭和氧化还原循环对沉积物地质化学的综合影响.

主要方法:

污染的沉积物被用在不同热解温度下产生的生物炭处理.
沉积物经历了连续的洪水周期,以模拟氧化还原波动.
物种,溶解有机碳的分析,以及碳,铁 (Fe) 和在固体和溶液阶段的空间分布/分类.

主要成果:

生物炭的应用和热解温度显著影响了As物种的可用性,甲基化和溶解的有机碳.
洪水循环,诱导减排条件,增加溶解的酸盐高达七倍.
生物炭的应用在最初的洪水循环后通常会减少Fe (III) 和As (V) 的减少.

结论:

氧化还原波动,特别是洪水周期,是沉积物中As行为的关键驱动因素.
生物炭的应用可以在减少条件下减轻As的释放.
在洪水周期中生物炭的再氧化增强了的固定性,突出了其长期修复受污染沉积物的潜力.

关键词:

甲基化的甲基化.在DMA中,DMA是DMA.这就是MMA.空间可变性空间可变性这就是TOF-SIMS.

更多相关视频

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

Published on: May 16, 2016

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

相关概念视频

Diversity of Archaea IV

Diversity of Archaea IV

Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...

Atomic Spectroscopy: Effects of Temperature

Atomic Spectroscopy: Effects of Temperature

Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...

Diversity of Archaea I

Diversity of Archaea I

Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...

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.