Yao Youru, Mi Na, Zhu Yongqing, Yin Li, Zhang Yong, Li Shiyin
School of Environment, Nanjing Normal University Nanjing 210023 China
School of Geography and Tourism, Anhui Normal University Wuhu 241003 China.
RSC Adv. 2019 Mar 19;9(16):9145-9152. doi: 10.1039/c8ra10429h. eCollection 2019 Mar 15.
Sulfamerazine (SMR) as a persistent organic pollutant in waste streams is of growing environmental concern. This study explores the extraction SMR from water into an acetic acid (AA) solution using granular activated carbon (GAC), and removal of SMR by ozonation in AA solution. Systematic experiments have shown that GAC can be used as an adsorbent to transfer sulfamerazine from water to AA solution. SMR removal efficiency is 99.5% in 10% AA aqueous solution, which is better than in water. The removal rate of SMR in the AA solution decreased as the initial molar ratio of SMR and O increased. The removal rate of SMR decreased with Fe present in the reactive system. The removal of SMR is dominated by indirect ozonation in water, while the SMR removal is an effect of both direct and indirect ozonation in AA solution. It is a very efficient process for the degradation of SMR in micro polluted water when using combined GAC adsorption-desorption in AA solution and ozonation of the resulting solution.
磺胺甲基嘧啶（SMR）作为废水流中的一种持久性有机污染物，日益引起环境关注。本研究探索了使用颗粒活性炭（GAC）将水中的SMR萃取到乙酸（AA）溶液中，并在AA溶液中通过臭氧氧化去除SMR。系统实验表明，GAC可作为吸附剂将磺胺甲基嘧啶从水转移到AA溶液中。在10%的AA水溶液中，SMR去除效率为99.5%，优于在水中的去除效率。随着SMR与O初始摩尔比的增加，AA溶液中SMR的去除率降低。反应体系中存在Fe时，SMR的去除率降低。水中SMR的去除以间接臭氧氧化为主，而AA溶液中SMR的去除是直接和间接臭氧氧化共同作用的结果。在AA溶液中使用GAC联合吸附-解吸以及对所得溶液进行臭氧氧化，是微污染水中SMR降解的一种非常有效的工艺。
