使用硫酸石墨烯氧化物从水中有效地去除斯帕弗洛克萨辛抗生素:动力学,热力学和环境影响
Chironjit Kumar Shaha1,2, Md Abdullah Al Mahmud3, Sudipta Saha4
1Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.
Heliyon
|July 23, 2024
概括
硫酸石墨烯氧化物有效地从水中去除斯帕弗洛克萨辛抗生素. 这种吸附剂具有很高的容量和可回收性,为制药污染提供了一个有希望的解决方案.
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 化学 化学
背景情况:
- 制药污染,特别是像斯帕弗洛克萨这样的抗生素,是一个关键的全球健康问题.
- 抗生素的高水溶性使其从水生环境中去除变得复杂.
- 开发高效的吸附剂对于减轻制药污染至关重要.
研究的目的:
- 为了合成和表征硫化石墨烯氧化物 (SGO) 用于吸附 sparfloxacin.
- 研究斯帕弗洛克萨辛在SGO上的吸附机制,动力学和热力学.
- 评估SGO的可重复使用性和效率,用于水资源整治.
主要方法:
- 硫化石墨烯氧化物 (SGO) 通过FTIR,XRD,XPS,SEM,TEM和BET等技术进行了合成和特征化.
- 吸附实验进行了不同的参数,如pH值,温度,初始度和吸附剂剂量.
- 进行了动力学和异热学研究,采用了伪二次和兰格穆尔等模型.
主要成果:
- SGO的表面积很大 (32.25 m2/g) 和零电荷点 (pHPZC) 为2.5.
- 伪二阶动态模型和兰迈尔等热量最好地描述了斯帕弗洛克萨的吸附.
- 在25°C时,通过自发的内热吸附过程,达到1428.57μmol/g的最大吸附能力.
- 在五个吸附-脱吸周期后,SGO保持了超过86.4%的效率.
结论:
- 硫酸石墨烯氧化物是一种高效的吸附剂,可以从水溶液中去除斯帕弗洛素.
- 吸附过程由化学吸附控制,遵循兰格穆尔等热法和伪二次动力学.
- SGO 显示出出色的可重复使用性和在药品废水处理中实际应用的潜力.
相关概念视频
Methods of Sterilization II: Chemical Methods
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
Chemical Agents for Microbial Control
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
Microbial 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...
Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...


