Occurrence, distribution, and ecological risks of antibiotics in Honghu Lake and surrounding aquaculture ponds, China

Mai, Zhan; Xiong, Xiong; Hu, Hongjuan; Jia, Jia; Wu, Chenxi; Wang, Guitang

doi:10.1007/s11356-023-25931-8

“…Over the past few years, there has been increasing attention towards the existence of new emerging pollutants such as pesticides, drugs, and endocrine-disrupting chemicals (EDC) in the aquatic environment [1][2][3]. Antibiotics are a group of pharmaceuticals widely used in human medicine [4] and amongst farm animal populations as veterinary medicine and growth promoters [5]. The use of antibiotics has increased and new ones have been developed because of the proliferation of antibiotic-resistant pathogens [6].…”

Section: Introductionmentioning

confidence: 99%

Fungal Biotransformation of a β-Lactam Antibiotic Ampicillin under Laccase-Induced Conditions

Ghariani,

Alessa,

Ben Atitallah

et al. 2024

Preprint

1

0

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The over use of pharmaceutical compounds, essentially antibiotics, led to an increase of their concentrations in aquatic ecosystems. In this study, the white-rot fungus Coriolopsis gallica (high-laccase-producing fungus) was investigated for the biodegradation of ampicillin (AMP) under different cultivation conditions. The biotransformation of the antibiotic was confirmed by means of high-performance liquid chromatography (HPLC), and the antibacterial activity was evaluated via the bacterial growth inhibition agar well diffusion method using Escherichia coli as an ampicillin-sensitive test strain. The results showed that AMP (50 mg L-1) was totally removed by C. gallica after 6 days of incubation in a liquid medium. The antibiotic removal rate was maximal with a fungal culture aged 9 days. Such a culture achieved the removal of a higher concentration of up to 500 mg L-1 of ampicillin in 3 days. This higher antibiotic removal rate was concomitant with the maximal laccase production in culture supernatant. In addition, four consecutive doses of 500 mg L-1 of ampicillin were transformed by the same fungal culture in 24 days. After that, the fungus was unable to remove the antibiotic. The measurement of ligninolytic enzyme activity showed that laccase of C. gallica might participate in the biotransformation of AMP.

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“…Algae are extremely susceptible to several antibiotics, and the food chain starts with them. Therefore, even a slight decrease in their numbers might affect the equilibrium of the food chain 12 . In terms of nanograms to micrograms per liter (ng/L -µg/L), the content of residual (unrefined) antibiotics in water is quite low.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms and factors affecting the removal of minocycline from aqueous solutions using graphene-modified resorcinol formaldehyde aerogels

Yazdanbakhsh,

Behzadi,

Moghaddam

et al. 2023

Sci Rep

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In recent years, concerns about the presence of pharmaceutical compounds in wastewater have increased. Various types of residues of tetracycline family antibiotic compounds, which are widely used, are found in environmental waters in relatively low and persistent concentrations, adversely affecting human health and the environment. In this study, a resorcinol formaldehyde (RF) aerogel was prepared using the sol–gel method at resorcinol/catalyst ratio of 400 and resorcinol/water ratio of 2 and drying at ambient pressure for removing antibiotics like minocycline. Next, RF aerogel was modified with graphene and to increase the specific surface area and porosity of the modified sample and to form the graphene plates without compromising the interconnected porous three-dimensional structure of the aerogel. Also, the pores were designed according to the size of the minocycline particles on the meso- and macro-scale, which bestowed the modified sample the ability to remove a significant amount of the minocycline antibiotic from the aqueous solution. The removal percentage of the antibiotic obtained by UV–vis spectroscopy. Ultimately, the performance of prepared aerogels was investigated under various conditions, including adsorbent doses (4–10 mg), solution pHs (2–12), contact times of the adsorbent with the adsorbate (3–24 h), and initial concentration of antibiotic (40–100 mg/l). The results from the BET test demonstrated that the surface area of the resorcinol formaldehyde aerogel sample, which included 1 wt% graphene (RF-G1), exhibited an augmentation in comparison to the surface area of the pure aerogel. Additionally, it was noted that the removal percentage of minocycline antibiotic for both the unmodified and altered samples was 71.6% and 92.1% at the optimal pH values of 4 and 6, respectively. The adsorption capacity of pure and modified aerogel for the minocycline antibiotic was 358 and 460.5 mg/g, respectively. The adsorption data for the modified aerogel was studied by the pseudo-second-order model and the results obtained from the samples for antibiotic adsorption with this model revealed a favorable fit, which indicated that the chemical adsorption in the rapid adsorption of the antibiotic by the modified aerogel had occurred.

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“…Algae are extremely susceptible to several antibiotics, and the food chain starts with them. Therefore, even a slight decrease in their numbers might affect the equilibrium of the food chain [12]. In terms of nanograms to micrograms per liter (ng/L -µg/L), the content of residual (unre ned) antibiotics in water is quite low.…”

Section: Introductionmentioning

confidence: 99%

Resorcinol Formaldehyde Aerogels Modified with Graphene for the Removal of Minocycline Antibiotics from Aqueous Solutions: Mechanisms and Influencing Factors

Yazdanbakhsh,

Behzadi,

Moghaddam

et al. 2023

Preprint

0

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In recent years, concerns about the presence of pharmaceutical compounds in wastewater have increased. Various types of residues of tetracycline family antibiotic compounds, which are widely used, are found in environmental waters in relatively low and persistent concentrations, adversely affecting human health and the environment. The goal of this work is to create organic aerogels with high-specific surface areas for the removal of antibiotics like minocycline. In this work, resorcinol formaldehyde aerogel was prepared through the sol-gel process and dried under ambient pressure. Graphene was used to modify the aerogel. Ultimately, the performance of synthesized samples under various conditions, including adsorbent doses (4–10 mg), solution pHs (2–12), and contact times (3–24 h) of the adsorbent with the adsorbate was investigated. The BET test findings illustrated that the surface area of the resorcinol formaldehyde aerogel sample containing 1 wt% graphene increased compared to that of the neat aerogel. Also, it was observed that the removal rate of minocycline antibiotics for neat and modified samples was 71.6% and 92.1% at optimal pHs of 4 and 6, respectively. Graphene-modified resorcinol formaldehyde aerogel was hence considered a suitable adsorbent for removing minocycline antibiotics from aqueous solutions and a promising candidate for environmental applications.

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Occurrence, distribution, and ecological risks of antibiotics in Honghu Lake and surrounding aquaculture ponds, China

Cited by 21 publications

References 42 publications

Fungal Biotransformation of a β-Lactam Antibiotic Ampicillin under Laccase-Induced Conditions

Fungal Biotransformation of a β-Lactam Antibiotic Ampicillin under Laccase-Induced Conditions

Mechanisms and factors affecting the removal of minocycline from aqueous solutions using graphene-modified resorcinol formaldehyde aerogels

Resorcinol Formaldehyde Aerogels Modified with Graphene for the Removal of Minocycline Antibiotics from Aqueous Solutions: Mechanisms and Influencing Factors

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