期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 62, 期 45, 页码 10855-10860出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf5034398
关键词
MCPA; terbuthylazine; nicosulfuron; indaziflam; biochar; aging
资金
- MINECO/FECYT
- [AGL2013-48446-C3-1-R]
- ARS [813260, ARS-0422678] Funding Source: Federal RePORTER
Sorption of four herbicides and a metabolite of indaziflam on a fresh macadamia nut biochar and biochars aged one or two years in soil was characterized. On fresh biochar, the sorption was terbuthylazine (K-d = 595) > indaziflam (K-d = 162) > MCPA (K-d = 7.5) > fluoroethyldiaminotriazine (K-d = 0.26) and nicosulfuron (K-d = 0). Biochar surface area increased with aging attributed to the loss of a surface film. This was also manifested in a decline in water extractable organic carbon with aging. Correspondingly, an increase in the aromaticity was observed. The higher surface area and porosity in aged biochar increased sorption of indaziflam (KdBC-2yr = 237) and fluoroethyldiaminotriazine (KdBC-1yr = 1.2 and KdBC-2yr = 3.0), but interestingly decreased sorption of terbuthylazine (KdBC-1yr = 312 and KdBC-2yr = 221) and MCPA (KdBC-1yr = 2 and KdBC-2yr = 2). These results will facilitate development of biochars for specific remediation purposes.
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