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Evaluation of biochars in reducing the bioavailability of flubendiamide in water/sediment using passive sampling with polyoxymethylene.
- Source :
-
Journal of Hazardous Materials . Feb2018, Vol. 344, p1000-1006. 7p. - Publication Year :
- 2018
-
Abstract
- An equilibrium passive sampler based on POM was first used to determine the C free of flubendiamide in water/sediment systems. The adsorption of flubendiamide by POM followed a first-order one-compartment uptake model and the POM-water partition coefficient was 1.90. The method was used to compare the efficiency of three biochars which were produced from crofton weed (BC-1, ∼500 °C), macadamia (BC-2, 550–660 °C) and wheat straw (BC-3, 550 °C). The Freundlich fit the sorption isotherm data well and the adsorption capacity was BC-1 > BC-3 > BC-2. The percent removal of the BC-1 was higher in acidic solutions. When different doses of BC-1 were added to two sediments, the C free of the flubendiamide was higher in the sediment with a low organic matter content (S-1). With an increase of BC-1, the C free was significantly reduced in S-1. A 30-day period of biochar-sediment contact time was sufficient for a reduction of freely dissolved flubendiamide in the case of the two sediments tested. In the combination of biochar addition (5%) and aging time (30 days), the maximum reductions were 87% and 60% in S-1 and S-2. Therefore, the reduction of bioavailability of the flubendiamide and pollution repair can be achieved by this process. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03043894
- Volume :
- 344
- Database :
- Academic Search Index
- Journal :
- Journal of Hazardous Materials
- Publication Type :
- Academic Journal
- Accession number :
- 126804622
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2017.12.003