Engineered biochar derived from eggshell-treated biomass for removal of aqueous lead

Hongyu Wang, Bin Gao, June Fang, Yong Sik Ok, Yingwen Xue, Kai Yang, Xinde Cao

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


Engineered biochars were prepared by slow pyrolysis of three types of biomass pretreated with eggshell waste. The resulting biochars were composite materials with eggshell particles on carbon surface within the pore networks, which were confirmed by various characterization tools. The engineered biochars showed relatively fast adsorption kinetics to Pb2+ aqueous solutions. In addition, adsorption isotherms showed that the Langmuir maximum Pb2+ adsorption capacities of the engineered biochars (103–261 mg/g) were higher than those of the pristine biochars (32.9–56.0 mg/g). The adsorption of Pb2+ onto the biochars were affected by adsorbent dosage, initial solution pH, and ionic strength. Findings from this work indicated that the engineered biochar from eggshell-treated biochar can be used as an effective agent for soil and water remediation and conservation.

Original languageEnglish
Pages (from-to)124-129
Number of pages6
JournalEcological Engineering
Publication statusPublished - 2018 Oct 1
Externally publishedYes

Bibliographical note

Funding Information:
This work was partially supported by the NSF ( CBET-1054405 ), NSFC ( 21428702 ), and China Research Council . Appendix A

Publisher Copyright:
© 2017 Elsevier B.V.


  • Biosorption
  • Conservation
  • Designer biochar
  • Heavy metal
  • Remediation

ASJC Scopus subject areas

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


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