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  1. Article ; Online: Algae mediated photodegradation of fluroquinolone antibiotic: Ofloxacin

    Ahmad, Waseem / Chandra Joshi, Harish / Kumar, Sanjay

    Current Research in Green and Sustainable Chemistry. 2022, v. 5 p.100269-

    2022  

    Abstract: Antibiotics are one of the most important pharmaceutical products and their excessive use generates significant adverse effectson the human environment. Their residues are harmful to the environment due to their potential hazard, toxicity and persistence. ...

    Abstract Antibiotics are one of the most important pharmaceutical products and their excessive use generates significant adverse effectson the human environment. Their residues are harmful to the environment due to their potential hazard, toxicity and persistence. The indirect photodegradation of these residual antibiotics using algae as a potential photosensitizer provides a good low cost environmental solution. Herein, the photochemical behaviors of fluoroquinolone antibiotics, such as ofloxacin, were evaluated in the presence of an algal solution. The result of proposed research work clearly indicates that the algae play a crucial role in the photodegradation of ofloxacin and also accelerate the rate of photodegradation. The effect of concentration and pH of the algal solution on the photochemical behavior of the ofloxacin showed that as the concentration of algae was increased the rate of the photodegradation of drug became faster.
    Keywords algae ; antibiotics ; green chemistry ; humans ; ofloxacin ; pH ; photolysis ; photosensitizing agents ; research ; toxicity ; Waste water treatment ; Photodegradation ; Photosensitizer
    Language English
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Use and reproduction
    ISSN 2666-0865
    DOI 10.1016/j.crgsc.2022.100269
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Silver-doped active carbon spheres and their application for microbial decontamination of water.

    Chandra Joshi, Harish / Dutta, Dhiraj / Gaur, Nisha / Singh, G S / Dubey, Rama / Dwivedi, S K

    Heliyon

    2022  Volume 8, Issue 4, Page(s) e09209

    Abstract: Highly efficient and durable, silver nanoparticles doped Active Carbon Spheres ACS(Ag) were synthesized by carbonization and activation of silver exchanged resins. The silver exchanged resins were prepared by exchanging ... ...

    Abstract Highly efficient and durable, silver nanoparticles doped Active Carbon Spheres ACS(Ag) were synthesized by carbonization and activation of silver exchanged resins. The silver exchanged resins were prepared by exchanging H
    Language English
    Publishing date 2022-03-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2022.e09209
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Silver-doped active carbon spheres and their application for microbial decontamination of water

    Chandra Joshi, Harish / Dutta, Dhiraj / Gaur, Nisha / Singh, G.S. / Dubey, Rama / Dwivedi, S.K.

    Heliyon. 2022 Apr., v. 8, no. 4

    2022  

    Abstract: Highly efficient and durable, silver nanoparticles doped Active Carbon Spheres ACS(Ag) were synthesized by carbonization and activation of silver exchanged resins. The silver exchanged resins were prepared by exchanging H⁺ ions of polystyrene sulphonate ... ...

    Abstract Highly efficient and durable, silver nanoparticles doped Active Carbon Spheres ACS(Ag) were synthesized by carbonization and activation of silver exchanged resins. The silver exchanged resins were prepared by exchanging H⁺ ions of polystyrene sulphonate resin with Ag⁺ ions of silver nitrate (AgNO₃). The quantity of Ag⁺ in the spheres was controlled by varying the concentration of AgNO₃, from 0.0125 to 0.1 M. With increasing molar concentration of AgNO₃, the effective intake of Ag⁺ by the sphere increases from 1.1 to 8.1 weight percent (wt %). For activation, the spheres were incubated in the CO₂ atmosphere for 6 h at fixed soaking temperature i.e. 1123 K. The characterization of synthesized silver doped ACS was performed by using different sophisticated instrumental techniques. The antimicrobial activity of silver doped ACS was studied against different bacterial strains like, E. coli, B. subtilis and Staphylococcus aureus. The study demonstrated that the zone of inhibition for E. coli was 16.9 ± 0.7 mm while for B. subtilis it was 17.1 ± 0.3 mm at a concentration of 8 mg of synthesized material. In addition, satisfactory results were obtained in shake flask and filtration test experiments also, even at a low concentration of 2 mg, showing growth inhibition of 94% for E. coli and 93% for B. subtilis. When the concentration of silver doped ACS was increased to 8 mg, complete removal of both the bacteria was observed after 24 h (100 % reduction for E. coli and B. subtilis). Furthermore, when silver doped ACS was tested against Staphylococcus aureus according to ASTM:E 2149-01 method, biocidal activity of up to 73% was observed. Therefore, the silver doped ACS can be considered as a potential biocidal material for the studied bacterial strains and hence find suitable application for decontamination of water.
    Keywords Escherichia coli ; Staphylococcus aureus ; antimicrobial properties ; carbon ; carbon dioxide ; carbonization ; culture flasks ; decontamination ; filtration ; growth retardation ; nanosilver ; polystyrenes ; silver ; silver nitrate ; temperature
    Language English
    Dates of publication 2022-04
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2022.e09209
    Database NAL-Catalogue (AGRICOLA)

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    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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