Abstract:
:The existing form of ionizable organic contaminants (IOCs) could affect their adsorption characteristics to soil and biochar. In this study, 2 IOCs, namely, sulfadiazine and imazalil, were selected to study their adsorption by rice straw-derived biochar-amended soils, as well as the effect of pH and gallic acid on their adsorption. The results showed that the soil adsorption isotherms of the two ionizable organic contaminants could be fitted well by a linear equation and the Freundlich equation, and r2 was more than 0.80. The adsorption coefficient (Kd) in the three kinds of soil ranged from 0.262 to 4.07 L kg-1 for sulfadiazine and from 3.11 to 96.5 L kg-1 for imazalil. After the addition of biochar, the adsorption of sulfadiazine and imazalil in the soil increased. The adsorption of sulfadiazine by biochar gradually decreased with the increase in pH; the adsorption of imazalil increased when the pH increased from 2 to 5 and then gradually decreased with increasing pH. Gallic acid enhanced the adsorption of the two IOCs to pure soil and biochar-amended soil.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
He Y,Yao T,Tan S,Yu B,Liu K,Hu L,Luo K,Liu M,Liu X,Bai Ldoi
10.1016/j.ecoenv.2019.109656subject
Has Abstractpub_date
2019-11-30 00:00:00pages
109656eissn
0147-6513issn
1090-2414pii
S0147-6513(19)30987-Xjournal_volume
184pub_type
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