Cu2+共存对磺胺嘧啶在土壤中吸附的影响

徐子文; 董梦阳; 刘喜娟; 邵翼飞; 吕十全; 胡树翔; 许玉芝; 胡欣欣; 刘爱菊

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中国环境科学 ›› 2021, Vol. 41 ›› Issue (6) : 2773-2779.

土壤污染与控制

Cu²⁺共存对磺胺嘧啶在土壤中吸附的影响

徐子文¹, 董梦阳¹, 刘喜娟¹, 邵翼飞¹, 吕十全¹, 胡树翔¹, 许玉芝², 胡欣欣², 刘爱菊²

作者信息 +

Effect of Cu²⁺coexistence on adsorption of sulfadiazine in soil

XU Zi-wen¹, DONG Meng-yang¹, LIU Xi-juan¹, SHAO Yi-fei¹, LV Shi-quan¹, HU Shu-xiang¹, XU Yu-zhi², HU Xin-xin², LIU Ai-ju²

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摘要

选取土壤环境中检出率高的铜和磺胺类抗生素为目标污染物，采用批次平衡试验法研究了在Cu²⁺共存时，磺胺嘧啶（SDZ）在pH值、离子浓度、有机质含量、颗粒粒径等因子影响下的吸附特征，并对吸附前后的土样进行傅里叶红外光谱（FT-IR）表征.结果表明，在不同pH值环境中，Cu²⁺显著提高了SDZ的吸附量；Cu²⁺和Ca²⁺均能与SDZ通过络合反应和离子桥作用促进SDZ的土壤吸附；有机质对SDZ的土壤吸附的影响与共存Cu²⁺浓度密切相关；Cu²⁺对黏粒吸附SDZ的影响较小；FT-IR分析表明，土壤对SDZ-Cu的吸附以物理吸附为主，并伴随氢键作用、表面络合、π-π共轭等作用.Cu²⁺可显著增加SDZ在土壤中持留能力，降低其环境迁移的风险.

Abstract

Copper (Cu) and Sulfadiazine (SDZ) were selected as target pollutants as their high detection rate in soil environment. The batch sorption methods were used to investigate effects of pH, ion concentration, organic matter content and particle size on SDZ adsorption to soil with Cu²⁺ co-existing. The adsorption mechanism of SDZ in soil was characterized by FT-IR analysis. Co-existence of Cu²⁺ significantly increased the adsorption amount of SDZ on soil even with different pH conditions. Both Cu²⁺ and Ca²⁺ could promote SDZ adsorption to soil particles by complexation and ion-bridge. The effect of organic matter on adsorption of SDZ on soil was greatly related to concentrations of the co-existing Cu²⁺. The adsorption of SDZ to soil clay was little influenced by the co-existing Cu²⁺. FT-IR analysis showed that the physical adsorption was the main mechanism of SDZ adsorption to soil, which was also accompanied by hydrogen bonding interactions, complexation and π-π conjugation. Cu²⁺ can significantly increase the retention capacity of SDZ in soil and reduce its risk of environmental migration.

导出引用

徐子文, 董梦阳, 刘喜娟, 邵翼飞, 吕十全, 胡树翔, 许玉芝, 胡欣欣, 刘爱菊. Cu²⁺共存对磺胺嘧啶在土壤中吸附的影响[J]. 中国环境科学. 2021, 41(6): 2773-2779

XU Zi-wen, DONG Meng-yang, LIU Xi-juan, SHAO Yi-fei, LV Shi-quan, HU Shu-xiang, XU Yu-zhi, HU Xin-xin, LIU Ai-ju. Effect of Cu²⁺coexistence on adsorption of sulfadiazine in soil[J]. China Environmental Science. 2021, 41(6): 2773-2779

中图分类号： X131.3

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