Removal of lead and bisphenol A using magnesium silicate impregnated palm-shell waste powdered activated carbon: Comparative studies on single and binary pollutant adsorption

Choe Earn Choong, Shaliza Ibrahim, Yeomin Yoon, Min Jang

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In this work, palm shell waste powder activated carbon coated by magnesium silicate (PPAC-MS) were synthesized by the impregnation of magnesium silicate (MgSiO3) using economical material (silicon dioxide powder) via mild hydrothermal approach for the first time. As an effective adsorbent, PPAC-MS simultaneously removes BPA and Pb(II) in single and binary mode. Surprisingly, PPAC-MS exhibited a homogeneous thin plate mesh-like structure, as well as meso- and macropores with a high surface area of 772.1 m2g−1. Due to its specific morphological characteristics, PPAC-MS had adsorption capacities of Pb(II) as high as 419.9 mg g−1 and 408.8 mg g−1 in single mode and binary mode based on Freudliuch isotherm model while those for BPA by PPAC-MS were 168.4 mg g−1 and 254.7 mg g−1 for single mode and binary modes corresponding to Langmuir isotherm model. Experiment results also indicated that the synergistic removal of BPA occurred because the precipitation process of Pb(II) leads to the co-precipitation of BPA with Pb(OH)2 compound. PPAC-MS showed a good reusability for 5 regeneration cycles using Mg(II) solution followed by thermal treatment. Overall, PPAC-MS has a high potential in the treatment process for wastewater containing both toxic heavy metals and emerging pollutants due to its high sorption capacities and reusability.

Original languageEnglish
Pages (from-to)142-151
Number of pages10
JournalEcotoxicology and Environmental Safety
Volume148
DOIs
StatePublished - 1 Feb 2018

Bibliographical note

Funding Information:
This work was supported by supported by UMCIC Prototype grant [ RU014C-2015G ]; Postgraduate Research Grant, University Malaya [ PG210-2015B ]; and partly supported by the Geo-Advanced Innovative Action Project ( 2012000550002 ) funded by the Korea Ministry of Environment (MOE) as well as the Research Grant of Kwangwoon University in 2017.

Publisher Copyright:
© 2017 Elsevier Inc.

Keywords

  • Adsorption
  • Bisphenol A
  • Lead
  • Magnesium silicate
  • Palm shell waste PAC

Fingerprint

Dive into the research topics of 'Removal of lead and bisphenol A using magnesium silicate impregnated palm-shell waste powdered activated carbon: Comparative studies on single and binary pollutant adsorption'. Together they form a unique fingerprint.

Cite this