膨润土负载纳米铁/镍还原阿莫西林的环境影响因素研究

采用液相还原法制备膨润土负载纳米铁/镍(Bent-Fe/Ni)用于还原阿莫西林,研究了不同浓度的阴离子(SO2-4、HCO-3)和阳离子(Ca2+、Cu2+)对Bent-Fe/Ni还原阿莫西林的影响.结果表明,SO2-4、HCO-3浓度对Bent-Fe/Ni还原阿莫西林的影响较大,当其浓度分别为0和500mg·L-1时,阿莫西林的去除率分别为93.7%和21.5%(SO2-4),以及93.7%和5.8%(HCO-3);Ca2+对Bent-Fe/Ni还原阿莫西林起到抑制作用,当其浓度为0和500 mg·L-1时,阿莫西林的去除率分别为93.7%和77.8%;低浓度的Cu2+对Bent-Fe/Ni还原阿莫西林起到促进作用,而高浓度的Cu2+对Bent-Fe/Ni还原阿莫西林起到抑制作用,当其浓度为0、10和100 mg·L-1时,阿莫西林的去除率分别为93.7%、94.8%和86.7%.

Study on the effect of environment factors on the reduction of amoxicillin using bentonite supported Fe/Ni nanoparticles

Bentonite supported Fe/Ni nanoparticles (Bent-Fe/Ni) was prepared by chemical reduction in aqueous solution, and was used to remove amoxicillin. The effects of different concentrations of anions (SO₄^2- and HCO₃^-) and cations (Ca²⁺ and Cu²⁺) on the reduction of amoxicillin using Bent-Fe/Ni were investigated. The results indicated that SO₄^2- and HCO₃^-was a major factor on the reduction of amoxicillin, where the removal efficiency of amoxicillin reduced from 93.7% to 21.5%, and 93.7% to 5.8% when the concentration of SO₄^2- and HCO₃^- increased from 0 to 500 mg·L^-1. However, the removal efficiency of amoxicillin reduced from 93.7% to 77.8% as the concentration of Ca²⁺ increased from 0 to 500 mg·L^-1, suggesting that the coexisted Ca²⁺ inhibited the reduction of amoxicillin. In addition, 93.7%, 94.8% and 86.7% of amoxicillin was removed as the concentration of Cu²⁺ was 0, 10 and 100 mg·L^-1, respectively, indicating that low concentration of Cu²⁺ promoted the reduction of amoxicillin and the high concentration of Cu²⁺ inhibited the reduction of amoxicillin.