Modification of agricultural waste/by-products for enhanced phosphate removal and recovery: potential and obstacles

T A H Nguyen; H H Ngo; W S Guo; J Zhang; S Liang; D J Lee; P D Nguyen; X T Bui

doi:10.1016/j.biortech.2014.07.047

Modification of agricultural waste/by-products for enhanced phosphate removal and recovery: potential and obstacles

Bioresour Technol. 2014 Oct:169:750-762. doi: 10.1016/j.biortech.2014.07.047. Epub 2014 Jul 17.

Authors

T A H Nguyen¹, H H Ngo², W S Guo³, J Zhang⁴, S Liang⁴, D J Lee⁵, P D Nguyen⁶, X T Bui⁷

Affiliations

¹ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
² Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.
³ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
⁴ Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
⁵ Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
⁶ Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, District 10, Ho Chi Minh City, Viet Nam.
⁷ Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, District 10, Ho Chi Minh City, Viet Nam; Division of Environmental Engineering and Management, Ton Duc Thang University, District 7, Ho Chi Minh City, Viet Nam.

PMID: 25103550
DOI: 10.1016/j.biortech.2014.07.047

Abstract

There is a growing trend to employ agricultural waste/by-products (AWBs) as the substrates for the development of phosphate biosorbents. Nevertheless, due to the lack of anion binding sites, natural AWBs are usually inefficient in phosphate decontamination. Consequently, modification plays a vital role in improving phosphate sorption's property of raw AWBs. This review paper evaluates all existing methods of modification. The literatures indicate that modification can significantly improve phosphate removal ability of AWBs by retaining phosphate ion onto modified AWBs principally via ion exchange (electrostatic interaction) and ligand exchange mechanisms. So far, little work has been done on the beneficial use of modified AWBs for the phosphorus recovery from aqueous solutions. The poor recyclability of modified AWBs could be responsible for their limited application. Hence, further study is essential to search for novel, cost-effective, and green methods of modification.

Keywords: Agricultural waste/by-products; Biosorbent; Modification; Phosphate; Removal efficiency.

Publication types

Research Support, Non-U.S. Gov't
Review

MeSH terms

Biodegradation, Environmental / drug effects
Cations
Environmental Restoration and Remediation / methods*
Metals / pharmacology
Phosphates / isolation & purification*
Waste Products / analysis*

Substances

Cations
Metals
Phosphates
Waste Products