Effects of Fe0 and Ni0 nanoparticles on hydrogen production from cotton stalk hydrolysate using Klebsiella sp. WL1316: Evaluation of size and concentration of the nanoparticles |
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| Affiliation: | 1. College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu, Anhui, 241000, China;2. College of Life Science, Tarim University, Alaer, Xinjiang, 843300, China;1. Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi-221005, India;2. Department of Biochemistry College of Medicine, University of Ha''il, Ha''il, Saudi Arabia;3. Department of Biology College of Sciences, University of Ha''il, Ha''il, Saudi Arabia;4. ERA Chair of Green Chemistry, Department of Chemistry and Biotechnology, Tallinn University of Technology, 12618 Tallinn, Estonia;5. ERA Chair for Food (By-) Products Valorization Technologies (VALORTECH), Estonian University of Life Sciences, Kreutzwaldi 56/5, 51006 Tartu, Estonia;6. Department of Environmental Studies, Satyawati College, University of Delhi, Delhi 110052, India;7. Department of Biological Sciences, Sam Higginbottom University of Agriculture, Technology & Sciences (Formerly Allahabad Agricultural Institute), Allahabad 221007, Uttar Pradesh, India;1. Department of Biotechnology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India;2. Department of Petrochemical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India;1. Key Laboratory of New Materials and Facilities for Rural Renewable Energy (MOA of China), Henan Agricultural University, Zhengzhou 450002, China;2. Institute of Atmospheric Pollution Research of Italian National Research Council, Rome 29300, Italy;1. Tsinghua University-Zhang Jiagang Joint Institute for Hydrogen Energy and Lithium-Ion Battery Technology, Tsinghua University, Beijing 100084, PR China;2. Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, PR China;1. Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China;2. Laboratory of Environment-Enhancing Energy (E2E), China Agricultural University, Beijing 100083, China;3. Department of Agricultural and Biological Engineering, University of Illinois at Urbana- Champaign, Urbana, IL 61801, USA |
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| Abstract: | Fe0 and Ni0 nanoparticles (NPs) of certain size were synthesized and added to the hydrogen production system from cotton stalk hydrolysate using Klebsiella sp. WL1316. Fe0 and Ni0 NPs with a size of 50 nm at all concentrations effectively improve hydrogen production during mid to late fermentation stages; particularly, the highest daily hydrogen production obtained following treatment with 50 nm Fe0 NPs at 30 mg/L fermented for 96 h significantly increased by 61% comparing to the control treatment. The reducing sugar consumption in cotton stalk hydrolysate and ΔOD600 could be improved to some extent by Fe0 and Ni0 NPs supplementation. Addition of Fe0 or Ni0 NPs of 50 nm at a concentration of 30 mg/L resulted in enhanced cumulative hydrogen production with improvement of hydrogen yield reached higher than 20%, and the values of Y(H2/S) were all higher than 90 mL/g substrate, reflecting good hydrogen production and substrate consumption. The analysis of the main soluble metabolites profile revealed that supplementation with Fe0 and Ni0 NPs of suitable size and concentration may decrease the metabolic flux in the competitive branch of hydrogen production and increase the metabolic flux of the key node that leads to hydrogen generation, thus promoting biohydrogen synthesis. |
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| Keywords: | Nanoparticles Hydrogen production Cotton stalk hydrolysate Size Concentration |
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