Issue 89, 2015

Removal of chlorpyrifos from waste water by wheat straw-derived biochar synthesized through oxygen-limited method

Abstract

Systematic studies have been performed for the first time to investigate the pyrolysis behavior of wheat straw and the adsorption mechanism of chlorpyrifos by wheat straw-derived biochar. FTIR and elemental analysis indicated that aromatic and hydrophobic substances are produced during the pyrolysis process of wheat straw. The BET results suggested that the pyrolysis temperature of wheat straw should be above 450 °C to acquire the biochar with a surface area above 60.0 m2 g−1. The adsorption experiments show that wheat straw-derived biochar at 750 °C (WS750) can effectively adsorb chlorpyrifos and the largest adsorption quantity is 16 mg g−1. The driving force for chlorpyrifos adsorption by WS750 is most likely attributed to the π⋯π stack between the aromatic ring of chlorpyrifos and these aromatic areas on WS750 surface. The adsorption behaviors follow the pseudo-second kinetic and Freundlich models. Recycle experiments show that the adsorption ability of WS750 can be recovered by washing with methanol. The present study shows that wheat straw-derived biochar can work as a highly effective and low-cost adsorbent to remove chlorpyrifos from waste water.

Graphical abstract: Removal of chlorpyrifos from waste water by wheat straw-derived biochar synthesized through oxygen-limited method

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2015
Accepted
11 Aug 2015
First published
11 Aug 2015

RSC Adv., 2015,5, 72572-72578

Author version available

Removal of chlorpyrifos from waste water by wheat straw-derived biochar synthesized through oxygen-limited method

P. Wang, Y. Yin, Y. Guo and C. Wang, RSC Adv., 2015, 5, 72572 DOI: 10.1039/C5RA10487D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements