Nano-cerium oxide functionalized biochar for phosphate retention: preparation, optimization and rice paddy application

Yanfang Feng; Haiying Lu; Yang Liu; Lihong Xue; Dionysios D Dionysiou; Linzhang Yang; Baoshan Xing

doi:10.1016/j.chemosphere.2017.07.107

Nano-cerium oxide functionalized biochar for phosphate retention: preparation, optimization and rice paddy application

Chemosphere. 2017 Oct:185:816-825. doi: 10.1016/j.chemosphere.2017.07.107. Epub 2017 Jul 19.

Authors

Yanfang Feng¹, Haiying Lu², Yang Liu³, Lihong Xue⁴, Dionysios D Dionysiou⁵, Linzhang Yang⁶, Baoshan Xing⁷

Affiliations

¹ Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
² Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
³ State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Institute of Agricultural Information, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
⁴ Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
⁵ Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH, 45221-0071, USA.
⁶ Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address: lzyang@issas.ac.cn.
⁷ Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.

PMID: 28735234
DOI: 10.1016/j.chemosphere.2017.07.107

Abstract

In this study, nano-cerium oxide functionalized maize straw biochar (Ce-MSB) was prepared and utilized to remove P from agricultural wastewater. Response Surface Model was applied to optimize the operating conditions. Moreover, Ce-MSB was applied to actual rice paddy column for the first time. Response Surface Model (RSM) showed higher materials ratio had positive effect on PO₄^3- adsorption capacity, while higher pyrolysis temperature had negative effect. The maximum adsorption capacity of Ce-MSB for PO₄^3- was 78 mg g^-1, implying that Ce-MSB was an effective functionalized adsorbent for P removal. Paddy soil column experiment showed that application of Ce-MSB decreased total phosphorus concentration of surface water by 27.33% and increased total phosphors (TP) content of top soil by 7.22%. Further, Ce-MSB tends to increase rice plant height and leaf area. Therefore, Ce-MSB can be used as a promising functionalized biochar to reduce the risk of phosphorus loss from paddy field surface running water.

Keywords: Functionalized biochar; Nano-cerium oxide; Phosphate retention; Response Surface Model; Rice paddy.

MeSH terms

Adsorption
Agriculture
Cerium / chemistry*
Charcoal / chemistry*
Models, Chemical
Nanostructures / chemistry*
Oryza
Phosphates / chemistry*
Phosphorus
Soil
Soil Pollutants / chemistry*

Substances

Phosphates
Soil
Soil Pollutants
biochar
Charcoal
Phosphorus
Cerium
ceric oxide