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Krishnappa B, Saravu S, Shivanna JM, Naik M, Hegde G. Fast and effective removal of textile dyes from the wastewater using reusable porous nano-carbons: a study on adsorptive parameters and isotherms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:79067-79081. [PMID: 35704233 DOI: 10.1007/s11356-022-21251-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
In the present study, recyclable porous nano-carbons (PNCs) were used to remove textile dyes (mainly methylene blue, methyl orange, and rhodamine B) from an aqueous environment. Due to their high surface area and mesoporous nature, PNCs exhibited extremely fast and efficient adsorption behavior. PNCs synthesized at an elevated temperature of 1000 °C are used in batch experiments, as they showed maximum dye removal with high surface area. Batch mode was used to optimize operational parameters such as initial dye concentration, contact time, adsorbent dose and pH as a function of time. Within ~7 minutes of treatment, PNCs achieved a maximum removal efficacy of ~99 percent for methylene blue. The recyclability of PNCs was investigated, and it retained its efficiency even after seven cycles. The efficacy of PNCs in treating industrial water contaminated with methylene blue dye was assessed. Different adsorption isotherms were carried out to determine maximum amount of dye that can be adsorbed on to surface of PNCs. The maximum adsorption capacity attained using Langmuir isotherm for methylene blue was around 1216.54 mg g-1. Adsorption kinetics were applied on experimental data to identify the rate of adsorption. It was confirmed that novel onion peel-based porous PNCs were successful in removing methylene blue dye effectively with short duration in comparison with other dyes mainly rhodamine B and methyl orange.
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Affiliation(s)
- Bhavya Krishnappa
- Centre for Nano-materials & Displays, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India
- Department of Civil Engineering, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India
| | - Supriya Saravu
- Centre for Nano-materials & Displays, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India
- Department of Chemistry, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India
| | | | - Maya Naik
- Department of Civil Engineering, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India
| | - Gurumurthy Hegde
- Centre for Nano-materials & Displays, B.M.S. College of Engineering, Bull Temple Road, Basavanagudi, Bengaluru, Karnataka, 560 019, India.
- Centre for Advanced Research and Development (CARD), CHRIST (Deemed to be University), Hosur Road, Bengaluru, Karnataka, 560029, India.
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Zhang B, Jiang Y, Ding Y, Zhang J, Balasubramanian R. Iron-catalyzed synthesis of biowaste-derived magnetic carbonaceous materials for environmental remediation applications. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Shukla AK, Sharma C, Acharya A. Bioinspired Metal-Free Fluorescent Carbon Nanozyme with Dual Catalytic Activity to Confront Cellular Oxidative Damage. ACS APPLIED MATERIALS & INTERFACES 2021; 13:15040-15052. [PMID: 33769785 DOI: 10.1021/acsami.1c03130] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Development of metal-free, recyclable enzyme mimics is challenging and requires key chemical modifications at the molecular level. Here, nitrilotriacetic acid-functionalized carbon nanospheres (LC-CNS@NTA) were prepared from the nitrogen-rich weed Lantana camara (LC) using a simple hydrothermal reaction condition. Transmission electron microscopy (TEM) studies revealed size of ∼160 ± 20 nm for LC-CNS@NTA whereas, the same showed fluorescence emission at ∼520 nm with a ∼63% quantum yield. Furthermore, LC-CNS@NTA showed strong peroxidase (Pxrd) activity toward a wide range of substrate viz., H2O2, 3,3',5,5'-tetramethylbenzidine, and o-phenylenediamine with Km and Vmax values of ∼257 μM and 1.06 μM/s, 282 μM and 1.47 μM/s, and 270.8 μM and 1.647 μM/s, respectively. Interestingly, this also showed catalase (CAT) activity against H2O2 with Km and Vmax values of ∼0.374 μM and 1.87 μM/s, respectively. It was observed that LC-CNS@NTA could effectively reduce the oxidative stress-induced cytotoxicity of HEK293 cells via retention of mitochondrial membrane potential, prevention of lipid peroxidation and DNA damage. It was further found that LC-CNS@NTA-treated cells showed reduced level of intracellular protein carbonylation and protein aggregation. The finding of the present study is expected to pave the path for designing engineered metal-free carbon nanozyme with dual enzyme mimic activity.
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Affiliation(s)
- Ashish K Shukla
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176061, Himachal Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Chandni Sharma
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176061, Himachal Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Amitabha Acharya
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176061, Himachal Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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