农业环境科学学报2017，Vol.36Issue(4)：761-767,7.DOI:10.11654/jaes.2016-1349
水土比、pH和有机质对沉积物吸附四环素的复合影响
Combination effects of pH, solution/soil ratio and inherent organic matter on the adsorption of tetracycline by sediments
摘要
Abstract
To understand the characteristic and mechanism of antibiotics migration in the aquatic environment influenced by sediment ad-sorption more clearly, this present study investigated the combination effects of pH , solution/soil ratio and inherent organic matter on the ad-sorption of tetracycline(TC)by sediments taken from Jiulong River. Composite effects of solution/soil ratio and pH on the adsorption was in-vestigated by batch sorption experiments with different solution/soil ratio and pH value. The effects of inherent organic matter on the adsorp-tion at different solution/soil ratio and pH conditions were also reseached by batch sorption experiments with initial concentration of TC in the range of 20∽100 mg·L-1. The results showed that the sorption of TC by sendiment was strongly pH-dependent, of which the adsorption efficiency reached the maximum value at the pH rang of 3∽5. Moreover, the adsorption efficiency decreased with pH increasing. The variety of solution/soil ratios changed the optimum pH value at which the maximum adsorption efficiency reached, i.e. The maximum adsorption ef-ficiencies were all reached at the optimum pH 3 when solution/soil ratio was 0.25 and 0.125 with the maximum value 95.3% and 96.8%, respectively. While the optimum pH value was changed to pH 5 when solution/soil ratio was 0.5(The maximum adsorption efficiency was de-creased to 82.82%). The reason may be that the main way of adsorption was changed from cation exchange to combination of ion exchange and complexation. Furthermore, the effect of the inherent organic matter of the sendiment could promote or inhibit the sorption of TC de-pending on the different pH, TC fractions, equilibrium concentrations and other conditions.关键词
四环素/沉积物/水土比/pH/有机质Key words
tetracycline/sediment/solution/soil ratios/pH/organic matter分类
资源环境引用本文复制引用
李宗宸,魏群山,罗专溪,徐龙凤,刘亚男,颜昌宙,柳建设..水土比、pH和有机质对沉积物吸附四环素的复合影响[J].农业环境科学学报,2017,36(4):761-767,7.基金项目
国家自然科学基金(21277138,21377203) （21277138,21377203）
东华大学中央高校基本科研业务费专项(2232014D3-17) （2232014D3-17）
国家国际科技合作专项(2001DFB91710) The National Natural Science Foundation of China(21277138,21377203) （2001DFB91710）
The Special Funding for Basic Scientific Research Business Expenses of Central University,Donghua University(2232014D3-17) （2232014D3-17）
The National Special Funding for International Technology Cooperation (2001DFB91710) （2001DFB91710）
