Synthesis of CdS nanoparticles from cadmium sulfate solutions using the extracellular polymeric substances of B. licheniformis as stabilizing agent |
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| Institution: | 1. Key Laboratory of Emerging Pathogens and Infections, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China;2. University of Chinese Academy of Sciences, Beijing 100039, China;1. Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China;2. Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, 24 Tongjia Lane, Gulou District, Nanjing 210009, China;1. Universidad Andres Bello, Bionanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biologicas, Republica # 239, Santiago, Chile;2. Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda 3363, Santiago, Chile;3. Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone Pohlhammer 1007, Santiago, Chile;4. Laboratorio de Microbiología Oral, Facultad de Odontología, Universidad de Chile, Sergio Livingstone Pohlhammer 943, Santiago, Chile;5. Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile;1. Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic;2. Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic;3. Global Change Research Institute, The Czech Academy of Sciences, v.v.i., Belidla 4a, CZ-603 00 Brno, Czech Republic;4. Department of Physiology and Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic;5. Department of Geology and Pedology, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic;1. School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia;2. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Melbourne, VIC 3122, Australia |
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| Abstract: | Mining and hydrometallurgical industries produce large amounts of hazardous metal sulfate solutions as a by-product which can be recycled and exploited to produce valuable and advanced materials. Here, for the first time, extracellular polymeric substances of Bacillus licheniformis were applied as biosurfactants to synthesize quantum dots of cadmium sulfide from pure artificial and impure industrial cadmium sulfate solutions. The bacterial biopolymers stabilized the generated crystalline nuclei as colloidal dots and prevented their further growth or agglomeration. In order to discover the composition and size distribution of the produced particles, characterization was performed by X-ray diffraction (XRD), and transmission electron microscopy (TEM). Results showed that the particles biosynthesized from the pure solution were nano-sized cubic crystals of CdS with the dimensions of 2–10 nm. The same product was also derived from the impure industrial solution. The outcomes of this study indicate the feasibility of cadmium or probably other metal recovery from industrial solutions and wastewaters in the form of valuable metal sulfide nanoparticles. |
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| Keywords: | Bacteria Biosynthesis Cadmium sulfide Nanoparticle Quantum dots |
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