Abstract

Rapid removal of noxious synthetic dyes from wastewater is of great concern in the scientific research field, this is due to the expansion of harmful effects of synthetic dyes traces in water streams on the environment and human health with the exponential rise in concentration of synthetic dye globally and demand in various industries that coincided with the implantation of more stringent water quality standards. Various technologies have been applied for the removal of synthetic dye from wastewater, including adsorption technology, which has a great potential in treating varieties of synthetic dyes. This article comprehensively reviews the latest progress in the development of carbon nanotubes (CNTs) and their applications for the removal of synthetic dyes from wastewater, including functionalized of CNTs and their researched counterparts. The emerging trends in the development of alternative adsorbents with different substrates, morphologies, and functional groups are also elucidated.

Highlights

  • Rapid removal of noxious synthetic dyes from wastewater is of great concern in the scientific research field, this is due to the expansion of harmful effects of synthetic dyes traces in water streams on the environment and human health with the exponential rise in concentration of synthetic dye globally and demand in various industries that coincided with the implantation of more stringent water quality standards

  • A new generation of chitosan hydrogel beads (CSBs) prepared by using sodium dodecyl sulfate (SDS) and multi-walled carbon nanotubes (MWCNTs) to improve their mechanical properties has demonstrated a high maximum adsorption capacity for Congo red (CR) (375.94 mg g-1) [57]

  • This article reviews the different adsorption technique using carbon nanotubes (CNTs) used for the removal of synthetic dyes from wastewaters

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Summary

Introduction

Rapid removal of noxious synthetic dyes from wastewater is of great concern in the scientific research field, this is due to the expansion of harmful effects of synthetic dyes traces in water streams on the environment and human health with the exponential rise in concentration of synthetic dye globally and demand in various industries that coincided with the implantation of more stringent water quality standards. This article comprehensively reviews the latest progress in the development of carbon nanotubes (CNTs) and their applications for the removal of synthetic dyes from wastewater, including functionalized of CNTs and their researched counterparts. Keywords Carbon nanotubes (CNTs) Á Activated carbon (AC) Á Synthetic dyes Á Adsorption Á Functionalization Á Wastewater treatment

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