Adsorptive removal of microcystin-LR from surface and wastewater using tyre-based powdered activated carbon: Kinetics and isotherms

Phodiso P. Mashile, Anele Mpupa, Philiswa N. Nomngongo

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Microcystin LR (MC-LR) is a highly toxic compound and it is known for its adverse health effect on both humans and animals. Due to the ineffectiveness of conventional water treatments methods, for the past decades, researchers have been developing cost-effective ways of removing MC-LR from water bodies. This study reports the application of powdered activated carbon (PAC) obtained from the waste tyre for the removal of MC-LR. The choice of the adsorbent was chosen due to its attractive properties. The prepared tyre-based PAC was found to have the large surface area (1111 m2 g−1). The detection of MC-LR was achieved using high performance liquid chromatography (HPLC) coupled with a PDA detector. The experimental parameters (such as optimum pH, dosage and contact time) affecting the removal of MC-LR using tyre based-powdered activated carbon were optimized using response surface methodology (RSM). Maximum removal of MC-LR was achieved under the following optimum conditions; sample pH 4, carbon dosage concentration 10,000 mg L−1 and contact time of 34 min. Under optimum conditions, kinetic studies and adsorption isotherms reflected better fit for pseudo-second-order rate and Langmuir isotherm model, respectively. The optimized method was applied for the removal of MC-LR in wastewater sample. The effluent and influent sample contained initial concentrations ranging from 0.52 to 8.54 μg L−1 and the removal efficiency was 100%.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalToxicon
Volume145
DOIs
Publication statusPublished - Apr 2018

Keywords

  • Adsorptive removal
  • Microcystin LR
  • Tyre based activated carbon
  • Wastewater

ASJC Scopus subject areas

  • Toxicology

Fingerprint

Dive into the research topics of 'Adsorptive removal of microcystin-LR from surface and wastewater using tyre-based powdered activated carbon: Kinetics and isotherms'. Together they form a unique fingerprint.

Cite this