膨润土/过硫酸盐协同处理罗丹明B废水的研究

Study on the Treatment of Rhodamine B Wastewater by Persulfate Combined with Bentonite

实验研究了膨润土和过硫酸盐协同去除水中的罗丹明B(RhB)。比较了4种不同体系中RhB的去除效率,并考察了不同因素对RhB去除效率的影响。结果表明,在单纯的PS和PMS体系中,RhB的去除率仅为22.97%和25.63%。而在Bt/PS和Bt/PMS体系中,去除率高达86.66%和98.32%,可见膨润土与过硫酸盐明显存在协同作用,且膨润土对PMS的协同作用强于PS。当过硫酸盐与RhB的摩尔比为5∶1,pH为3,反应温度为30℃时,Bt/PS和Bt/PMS体系能在30min内完全去除水中的RhB。

Removal of Rhodamine B (RhB) from wastewater by bentonite and persulfate was studied in this paper.The efficiency of four different systems on removal of RhB was compared. The influence of different reaction conditions on removal efficiency of RhB was investigated.The results showed that the removal rate of RhB was only 22.97% and 25.63% in single PS and PMS system, respectively. However, the removal rate can reach as high as 86.66% and 98.32% in Bt/PS and Bt/PMS system. It demonstrated that a significant synergistic effect existed between persulfate and bentonite, and the synergistic effect of bentonite on PMS was stronger than that of PS. When the dosage of bentonite was 0.01 g, the molar ratio of persulfate to RhB was 5∶ 1, pH value was 3, temperature was 30 ℃, the Bt/PS and Bt/PMS system can remove all of the RhB in the wastewater within 30 min.