土壤2018，Vol.50Issue(2)：353-360,8.DOI:10.13758/j.cnki.tr.2018.02.019
生物质炭对磺胺类抗生素在坡耕地紫色土中吸附-解吸及淋溶过程的影响
Effects of Biochar Application on Sorption-Desorption Process and Leaching Behaviour of Sulfonamide Antibiotics
摘要
Abstract
Sorption and desorption are an important process that will influence the behavior of transport, transform and bioavailability of antibiotics in soils. In this study, batch and column experiments were carried out to study the effects of biochar application on the sorption-desorption process and leaching behaviour of three typical sulfonamide antibiotics (Sulfadiazine, SD;Sulfamethazine, SM2; and Sulfamethoxazole, SMZ) in a sloping cropland purple soil which is distributed widely and abundantly in Sichuan hilly area. Biochar was applied to the tested soil with the amounts of 0 (B0), 39.75 t/hm2(B1) and 198.75 t/hm2(B2) respectively and went through a half-year dry-wet alternate aging process (from May to November). The results showed that the adsorption capacity of three sulfonamides followed the order of SD>SMZ>SM2; Compared with B0, addition of fresh biochar enhanced the adsorption of SD, SM2 and SMZ, among which the improvement for SM2 was significant (P<0.05), but such effect became less obvious after the ageing process. As for the desorption process, the value of Freundlich coefficient Kfof three sulfonamides followed the order of SD>SMZ>SM2, indicating that SD had the highest adsorption capacity and lowest desorption capacity with SM2 inversely. The hysteresis coefficient (H) of three sulfonamides followed the order of SD<SMZ<SM2, which was consistent with the trend of the Freundlich coefficient n. It suggested that SM2 desorbed the fastest from purple soil due to the lowest appetency, while SM2 behaved oppositely. Three sulfonamide antibiotics transported more slowly in B1 compared with B0.关键词
紫色土/生物质炭/磺胺类抗生素/吸附-解吸/干湿交替Key words
Purple soil/Biochar/Sulfonamides/Sorption and desorption/Alternation of drying and wetting分类
资源环境引用本文复制引用
周志强,刘琛,杨红薇,鲜青松,唐翔宇..生物质炭对磺胺类抗生素在坡耕地紫色土中吸附-解吸及淋溶过程的影响[J].土壤,2018,50(2):353-360,8.基金项目
国家自然科学基金青年科学基金项目(41301549)资助. （41301549）
