卷心菜废弃物衍生活性炭,用于从合成和制废水中去除六价
Emnet Berhane1,2, Belay Negassa3,4, Kebede Takele Ayansa1
1Department of Environmental Health Science and Technology, Faculty of Public Health, Health Institute, Jimma University, Jimma, Ethiopia.
BMC chemistry
|April 20, 2025
概括
来自卷心菜废物的活性炭有效地从工业废水中去除六价. 这种可持续的吸附剂从合成样本中得到了近100%的去除,从皮革厂的废水中获得了超过83%的去除.
科学领域:
- 环境化学环境化学
- 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:
- 工业废水,特别是来自制厂的废水,由于重金属污染,造成了严重的环境风险.
- 六价 (Cr (VI)) 是一种有毒和致癌的污染物,需要有效的去除方法.
- 对于某些度,传统的处理方法可能昂贵且效率较低.
研究的目的:
- 调查从卷心菜废物中提取的活性炭在去除六价方面的有效性.
- 为了优化吸附条件和评估吸附机制.
- 评估使用农业废弃物用于废水处理的可行性.
主要方法:
- 用酸激活和在450°C的碳化方法将白菜废料转化为活性炭.
- 在不同参数 (pH,度,剂量,时间,速度,温度) 下,使用合成和制废水进行了批量吸附实验.
- 吸附数据使用异温 (弗朗德利希) 和动力 (伪二次) 模型,以及热力学研究来分析.
主要成果:
- 在优化条件下,从合成废水中去除了99.87%的Cr (VI),从制废水中去除了83.81%.
- 弗洛伊德利希异热模型最好地描述了吸附,其容量为4.9 mg/g.
- 吸附遵循伪二次动力学,表明化学吸附过程.
结论:
- 来自卷心菜废物的活性炭是一种高效和可持续的吸附剂,用于去除六价.
- 吸附过程是自发的,外热的,并且在热力学上可行.
- 这种方法为处理污染的工业废水提供了一个有希望的环保解决方案.
更多相关视频
08:49Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
Published on: May 15, 2017
10.5K
10:44Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
9.8K
相关概念视频
01:25Microbial Bioremediation of Uranium
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...