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Adsorption and degradation of 2,4-dichlorophenoxyacetic acid in spiked soil with Fe0 nanoparticles supported by biochar

TitleAdsorption and degradation of 2,4-dichlorophenoxyacetic acid in spiked soil with Fe0 nanoparticles supported by biochar
Publication TypeJournal Article
Year of Publication2015
AuthorsYing, Bo, Lin Guolin, Jin Lanshu, Zhao Yuting, Zhang Tao, and Tang Jiaxi
JournalActa Agriculturae Scandinavica, Section B — Soil & Plant Science
Pagination1 - 7
Date Published01/2015
ISSN1651-1913
Abstract

This work studies the adsorption and degradation of 2,4-dichlorophenoxyacetic (2,4-D) in spiked soil with nanoscale Fe0 particles (nFe0) and biochar derived from maize straw. When biochar concentration was high, the adsorption capacity of soil was enhanced. Furthermore, 2,4-D degraded completely at loading rates of 0.33 and 0.17 g/L nFe0 plus biochar (initial 2,4-D concentration of 10 mg/g) within 40 h, according to equilibrium data. Additionally, the theoretical concentration of chloridion was approximately 84%. Further analysis indicated that the effect of nFe0 on 2,4-D degradation was weaker in soil columns than that in soil slurry. By contrast, 2,4-D degradation is positively influenced by biochar application, which prevented the aggregation and corrosion of Fe nanoparticles. Although the enhanced capacity for 2,4-D adsorption on the soil decelerated dechlorination rate, long-term nFe0 activity was generated. After 72 h, the efficiency of 2,4-D degradation was approximately 53.2% in the soil columns with biochar support.

URLhttp://www.tandfonline.com/doi/abs/10.1080/09064710.2014.992939#.VLdEESjkCZQ
DOI10.1080/09064710.2014.992939
Short TitleActa Agriculturae Scandinavica, Section B — Soil & Plant Science