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Related Concept Videos

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Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
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Nitrogen-enriched carbon sheet for Methyl blue dye adsorption.

Ijaz Hussain1, Yang Li1, Junwen Qi1

  • 1Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.

Journal of Environmental Management
|March 24, 2018
PubMed
Summary

Nitrogen-enriched carbon sheets (NECS) effectively remove anionic dyes like Methyl blue. This novel material demonstrates high adsorption capacity and easy regeneration, making it promising for wastewater treatment.

Keywords:
AdsorbentMethyl blue removalNitrogen-enriched carbon sheetRegenerationpH-sensitive behavior

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Nanotechnology

Background:

  • Wastewater contamination by anionic dyes poses environmental challenges.
  • Developing efficient and reusable adsorbents is crucial for dye removal.
  • Nitrogen-enriched carbon materials show potential for adsorptive remediation.

Purpose of the Study:

  • To fabricate nitrogen-enriched carbon sheets (NECS) using a novel method.
  • To evaluate the adsorption performance of NECS for anionic dye removal.
  • To investigate the pH-dependent adsorption behavior and regeneration capabilities of NECS.

Main Methods:

  • Fabrication of NECS using sodium gluconate and melamine via chemical blowing.
  • Characterization of NECS morphology, surface area, and nitrogen content.
  • Adsorption experiments using Methyl blue (a-Mb) dye, including isotherm and pH studies.
  • Evaluation of adsorbent regeneration over multiple cycles.

Main Results:

  • NECS synthesized with sheet-like morphology, high surface area (604 m²/g), and nitrogen content (11.2 wt%).
  • Excellent adsorption of Methyl blue with capacity fitting Langmuir model (847 mg/g).
  • Significant pH-dependent adsorption, with capacity increasing from 34 to 701 mg/g as pH decreased from 10 to 2.
  • Effective regeneration of NECS over five cycles without significant performance loss.

Conclusions:

  • NECS is a highly effective adsorbent for anionic dyes like Methyl blue.
  • The material's performance is strongly influenced by solution pH.
  • NECS offers a recyclable and efficient solution for dye wastewater treatment.