Pharmaceutical compounds in tributaries of the Han River watershed, South Korea

Im, Jong Kwon; Hwang, Moon Young; Lee, Eun Hee; Noh, Hye Ran; Yu, Soon Ju

doi:10.1016/j.envres.2020.109758

Cited by 18 publications

(8 citation statements)

References 68 publications

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“…Considering the actual concentrations of CBZ detected in the rivers and wastewater treatment plants worldwide, higher removal efficiencies by using microalgae-based bioremediation can be expected. For instance, 1.1 μg L −1 CBZ and 13.8-145.0 ng L −1 CBZ were detected in the Han River and Nakdong River, respectively (Im et al, 2020;Seo et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Enhancement of carbamazepine removal rate using Tetradesmus obliquus KNUA061 and NaOCl and utilization of the resulting biomass

Yeo

et al. 2022

Front. Energy Res.

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Pharmaceutical and personal care products (PPCPs) are discharged into receiving water bodies mainly from sewage treatment plants. Due to the inefficient removal in conventional wastewater treatment facilities, PPCPs have become a major concern to aquatic ecosystems, water quality, and public health worldwide since they cause harmful effects on aquatic life and human even at low doses. Among the PPCPs, carbamazepine (CBZ) is one of the most commonly prescribed anticonvulsant drugs and consumed more than 1,000 tons per year. Due to its structural complexity, CBZ is known as recalcitrant compound highly stable during wastewater treatment. Consequently, it has become one of the most frequently detected pharmaceuticals in waste water, surface water, and even drinking water. In this study, Korean indigenous microalgae strains were tested as eco-friendly and cost-effective solutions for CBZ removal. Based on the preliminary biological CBZ degradation tests, Tetradesmus obliquus KNUA061 demonstrating the best CBZ removal rate was selected for further experiments. In order to increase strain KNUA061's CBZ removal efficiency, NaOCl, which is widely accepted in the water purification process, was used as an additional stimulus to induce stress conditions. At around 20 μg L−1 CBZ, addition of 1.0 mg NaOCl resulted in approximately 20% of removal rate increase without suppressing cells growth. Roughly 90% of CBZ remained its original form and the composition of the transformed secondary metabolites was less than 10% during the biodegradation process by the microalga. Based on the results of the antioxidant enzyme activities, degree of lipid oxidation, and amino acid contents, it was concluded that the redox-defence system in microalgal cells may have been activated by the NaOCl treatment. Biomass analysis results showed that higher heating value (HHV) of strain KNUA061 biomass was higher than those of lignocellulosic energy crops suggesting that it could be utilized as a possible renewable energy source. Even though its biodiesel properties were slightly below the international standards due to the high PUFA contents, the biodiesel produced from T. obliquus KNUA061 could be used as a blending resource for transportation fuels. It was also determined that the microalgal biomass has acceptable feasibility as a sustainable dietary supplement feedstock due to its high essential amino acid contents.

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Section: Discussionmentioning

confidence: 99%

Enhancement of carbamazepine removal rate using Tetradesmus obliquus KNUA061 and NaOCl and utilization of the resulting biomass

Yeo

et al. 2022

Front. Energy Res.

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“…Natural water bodies are often contaminated due to direct disposal of various pharmaceutical wastes from hospitals, clinical laboratories, consumer use, * Author to whom any correspondence should be addressed. and production facilities [1][2][3][4]. According to the World Health Organization, of the total medical waste generated by healthcare activities, approximately 15% of them are considered to be hazardous [5].…”

Section: Introductionmentioning

confidence: 99%

100 GSM paper as an SERS substrate for trace detection of pharmaceutical drugs in an aqueous medium

Sarma¹,

Biswas²,

Hatiboruah³

et al. 2022

J. Phys. D: Appl. Phys.

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Surface-enhanced Raman Spectroscopy (SERS) is a unique technique that allows us to detect samples in trace quantities. This nanomaterial assisted phenomenon has been extensively studied over past several decades for sensing various chemical, biological and gaseous samples. Present work demonstrates the working of a paper-based SERS substrate to detect and quantify two pharmaceutical drugs- paracetamol, and aspirin in water. The proposed paper-based SERS substrate has been obtained by drop-casting of silver nanoparticles (AgNPs) over a 100 grams per square meter (GSM) paper. The performance of the designed SERS substrate has been initially evaluated with two Raman active samples - malachite green (MG) and rhodamine-6G (R6G). Upon noticing its reliable performance, the usability of the designed SERS substrate has been demonstrated to detect and quantify paracetamol and aspirin in the water medium. The applicability of the proposed SERS substrate in the real field environment has also been demonstrated through detection of these two drug elements in field collected water samples.

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“…Pharmaceutical products are consideredemerging pollutants in numerous aquatic matrices such as waste, surface, and groundwater [ 1 ]. They are considered semi-persistent pollutants due to their resistance, consumption, and non-volatile character [ 2 ]. The toxicity, high biological activity, and formation of dangerous metabolites can lead to serious and long-term problems for aquatic organisms and water quality [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

et al. 2021

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Ibuprofen (IBU) is one of the most-sold anti-inflammatory drugs in the world, and its residues can reach aquatic systems, causing serious health and environmental problems. Strategies are used to improve the photocatalytic activity of zinc oxide (ZnO), and thosethat involvethe inclusion of metalhave received special attention. The aim of this work was to investigate the influence of the parameters and toxicity of a photoproduct using zinc oxide that contains cerium (ZnO-Ce) for the photodegradation of ibuprofen. The parameters include the influence of the photocatalyst concentration (0.5, 0.5, and 1.5 g L−1) as well as the effects of pH (3, 7, and 10), the effect of H2O2, and radical scavengers. The photocatalyst was characterized by Scanning Electron Microscopy-Energy Dispersive Spectroscopy, Transmission electron microscopy, Raman, X-Ray Diffraction, surface area, and diffuse reflectance. The photocatalytic activity of ibuprofen was evaluated in an aqueous solution under UV light for 120 min. The structural characterization by XRD and SEM elucidated the fact that the nanoparticle ZnO contained cerium. The band gap value was 3.31 eV. The best experimental conditions for the photodegradation of IBU were 60% obtained in an acidic condition using 0.50 g L−1 of ZnO-Ce in a solution of 20 ppm of IBU. The presence of hydrogen peroxide favored the photocatalysis process. ZnO-Ce exhibited good IBU degradation activity even after three photocatalytic cycles under UV light. The hole plays akey role in the degradation process of ibuprofen. The toxicity of photolyzed products was monitored against Artemia salina (bioindicator) and did not generate toxic metabolites. Therefore, this work provides a strategic design to improve ZnO-Ce photocatalysts for environmental remediation.

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Pharmaceutical compounds in tributaries of the Han River watershed, South Korea

Cited by 18 publications

References 68 publications

Enhancement of carbamazepine removal rate using Tetradesmus obliquus KNUA061 and NaOCl and utilization of the resulting biomass

Enhancement of carbamazepine removal rate using Tetradesmus obliquus KNUA061 and NaOCl and utilization of the resulting biomass

100 GSM paper as an SERS substrate for trace detection of pharmaceutical drugs in an aqueous medium

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

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