Kui Liu, Wen-Chieh Cheng, Yi-Xin Xie, Lin Wang, Zhong-Fei Xue, Bowen Yang, Hao Zhang, Jia Min, Miao Yao
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引用次数: 0
Abstract
The volatilization of naphthalene unavoidably poses significant risks to health, the environment, and safety. Traditional remediation approaches have been criticized for their inefficiency in removing naphthalene and transforming its toxicity. This study proposed a bacteria-loaded carrier material and evaluated its degradation efficiency compared to that of free bacteria. High concentrations made it more challenging for Microbacterium paraoxydans (ms) to achieve effective degradation of naphthalene. Additionally, the degradation process was not timely, thereby exacerbating the risks associated with the volatilization of naphthalene. Three carrier materials-activated carbon (AC), calcium alginate (CA), and composite gel beads (CO)-were evaluated for their adsorption, biocompatibility, and thermal stability. CO's adsorption of naphthalene occurred mainly through chemisorption, with π-π conjugation and Ca-π interaction enhancing the adsorption process. The adsorption peaks did not exhibit any shifts after the involvement of bacteria, indicating the best biocompatibility among the carrier materials, despite having the second lowest total weight loss (CA > CO > AC) during the heating process. The salicylic acid pathway and the phthalic acid pathway were involved in the degradation of naphthalene. No signs of naphthalene were seen in the samples from confocal laser scanning microscope (CLSM) tests, indicating that ms fully degraded naphthalene after its adsorption. While ms degraded naphthalene on day 4 for 50 mg/L and 100 mg/L concentrations, 31.2 mg/L remained for the 200 mg/L concentration. In contrast, ms-loaded CO degraded most of the naphthalene on day 1, with only 2.8 mg/L remaining from the initial 200 mg/L concentration. This study underscored the relative merits of applying ms-loaded CO to the degradation of naphthalene.
期刊介绍:
Frontiers in Chemistry is a high visiblity and quality journal, publishing rigorously peer-reviewed research across the chemical sciences. Field Chief Editor Steve Suib at the University of Connecticut is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to academics, industry leaders and the public worldwide.
Chemistry is a branch of science that is linked to all other main fields of research. The omnipresence of Chemistry is apparent in our everyday lives from the electronic devices that we all use to communicate, to foods we eat, to our health and well-being, to the different forms of energy that we use. While there are many subtopics and specialties of Chemistry, the fundamental link in all these areas is how atoms, ions, and molecules come together and come apart in what some have come to call the “dance of life”.
All specialty sections of Frontiers in Chemistry are open-access with the goal of publishing outstanding research publications, review articles, commentaries, and ideas about various aspects of Chemistry. The past forms of publication often have specific subdisciplines, most commonly of analytical, inorganic, organic and physical chemistries, but these days those lines and boxes are quite blurry and the silos of those disciplines appear to be eroding. Chemistry is important to both fundamental and applied areas of research and manufacturing, and indeed the outlines of academic versus industrial research are also often artificial. Collaborative research across all specialty areas of Chemistry is highly encouraged and supported as we move forward. These are exciting times and the field of Chemistry is an important and significant contributor to our collective knowledge.