土壤溶液性质及铜共存对磺胺嘧啶在稻田土壤中吸附的影响。
Effect of Soil Solution Properties and Cu Co-Existence on the Adsorption of Sulfadiazine onto Paddy Soil.
机构信息
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 225049, China.
School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China.
出版信息
Int J Environ Res Public Health. 2021 Dec 19;18(24):13383. doi: 10.3390/ijerph182413383.
Paddy soils are globally distributed and saturated with water long term, which is different from most terrestrial ecosystems. To better understand the environmental risks of antibiotics in paddy soils, this study chose sulfadiazine (SDZ) as a typical antibiotic. We investigated its adsorption behavior and the influence of soil solution properties, such as pH conditions, dissolved organic carbon (DOC), ionic concentrations (IC), and the co-existence of Cu. The results indicated that (1) changes in soil solution pH and IC lower the adsorption of SDZ in paddy soils. (2) Increase of DOC facilitated the adsorption of SDZ in paddy soils. (3) Cu co-existence increased the adsorption of SDZ on organic components, but decreased the adsorption capacity of clay soil for SDZ. (4) Further FTIR and SEM analyses indicated that complexation may not be the only form of Cu and SDZ co-adsorption in paddy soils. Based on the above results, it can be concluded that soil solution properties and co-existent cations determine the sorption behavior of SDZ in paddy soils.
稻田土壤在全球范围内广泛分布且长期处于饱和水状态，这与大多数陆地生态系统不同。为了更好地了解稻田土壤中抗生素的环境风险，本研究选择磺胺嘧啶（SDZ）作为典型抗生素。我们研究了其在稻田土壤中的吸附行为以及土壤溶液特性（如 pH 值条件、溶解有机碳（DOC）、离子浓度（IC）和 Cu 的共存）的影响。结果表明：（1）土壤溶液 pH 值和 IC 的变化会降低 SDZ 在稻田土壤中的吸附；（2）DOC 的增加有利于 SDZ 在稻田土壤中的吸附；（3）Cu 的共存会增加 SDZ 在有机组分上的吸附，但会降低黏土土壤对 SDZ 的吸附容量；（4）进一步的傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分析表明，配合作用可能不是 Cu 和 SDZ 在稻田土壤中共吸附的唯一形式。基于上述结果，可以得出结论，土壤溶液特性和共存阳离子决定了 SDZ 在稻田土壤中的吸附行为。
Zotero 插件