Acid Orange-7 uptake on spherical-shaped nanocarbons

Title

Acid Orange-7 uptake on spherical-shaped nanocarbons

Creator

Krishnappa B.; Mannekote Shivanna J.; Naik M.; Padova P.D.; Hegde G.

Description

Acid-dyes, typically used in textile productions, could infer poisoning harmful effects on the environment as well as on human health, if not properly treated during their disposal. Henceforth, there is an absolute necessity to achieve new efficient low-cost techniques to remove these dyes from industrial chemical waste. Here, the leaves of oil palm, which are abundant in tropical countries, were used as precursor in the development of carbon nanospheres (adsorbent) to remove hazardous acid Orange-7 (AO-7) dye (C16H11N2NaO4S). The removal efficacy of spherical-shaped nanocarbons was investigated as a function of contact period, by varying their dose (0.5, 1, 1.5, 2 and 2.5mg), pH (acidic, native and basic), and initial AO-7 concentration (10, 15, 20, 25 and 30?M). Amazingly, the oil palm leavesbased carbon nanospheres removed acid-dye up to an efficiency of about 99%. Pseudo second-order kinetics governs the adsorption mechanism and the RedlichPeterson isotherm model fits well to the adsorption results, with regression co-efficient close to unity. This study suggests the importance of natural biowaste-based carbon nanoparticles in sustainable recycling, within the worldwide demanded circular economy. The Author(s) 2021.

Source

Nanomaterials and Nanotechnology, Vol-11

Date

2021-01-01

Publisher

SAGE Publications Ltd

Subject

Acid orange-7(C₁₆H₁₁N₂NaO₄S); adsorption; biowaste; carbon nanospheres; oil palm leaves

Coverage

Krishnappa B., Centre for Nano-materials Displays, B.M.S. College of Engineering, Bengaluru, Karnataka, India, Department of Civil Engineering, B.M.S. College of Engineering, Bengaluru, Karnataka, India; Mannekote Shivanna J., Department of Chemistry, DayanandaSagar College of Engineering, Bengaluru, Karnataka, India; Naik M., Department of Civil Engineering, B.M.S. College of Engineering, Bengaluru, Karnataka, India; Padova P.D., Istituto di Struttura della Materia-CNR (ISM-CNR), Rome, Italy; Hegde G., Centre for Nano-materials Displays, B.M.S. College of Engineering, Bengaluru, Karnataka, India, Centre for Advanced Research and Development, Department of Chemistry, CHRIST (Deemed to be) University, Karnataka, India

Rights

All Open Access; Gold Open Access

Relation

ISSN: 18479804

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1177/18479804211055031

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121364250&doi=10.1177%2f18479804211055031&partnerID=40&md5=d441c77796b3e9edd8be771998e73e8d