Low cost earthworm manure-derived carbon material for the adsorption of Cu2+ from aqueous solution: Impact of pyrolysis temperature

Bin Zhou, Zhanghong Wang, Dekui Shen*, Fei Shen, Chunfei Wu, Rui Xiao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Earthworm manure, an emerging and abundant bio-waste from vermicomposting, was subjected to pyrolyze at 400–600 °C to prepare carbon material (EMBCs) for the removal of Cu2+ from aqueous solution. The adsorption capability and inherent mechanism were thoroughly investigated. All adsorption processes of Cu2+ by EMBCs were described through Langmuir isotherm model and pseudo-second-order model. The adsorption capacity of EMBCs was declined with the pyrolysis temperature, while the binding strength between EMBCs and Cu2+ was significantly enhanced accordingly. The adsorption process of Cu2+ by EMBCs was found to be dominated by precipitation, complexation, Cπ-cations interactions. Precipitation was mainly stimulated by silicates and phosphates leading to 35.12%–40.72% adsorption of Cu2+. The contribution of complexation to Cu2+ adsorption were decreased from 46.61% to 17.12% as the pyrolysis temperature was increased form 400 to 600 °C. Comparatively, the contribution of Cπ-cations interaction were increased from 18.27% to 42.16% with the increased temperature due to the abundant aromatic C[dbnd]C structure.

Original languageEnglish
Pages (from-to)189-195
JournalEcological Engineering
Volume98
Early online date28 Oct 2016
DOIs
Publication statusPublished - 01 Jan 2017

Keywords

  • Carbon material
  • Cu adsorption
  • Earthworm manure
  • Pyrolysis temperature

ASJC Scopus subject areas

  • Environmental Engineering
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

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