海绵铁协同菌藻共生体脱色降解偶氮染料实验研究

An Experimental Study on the Decolourisation and Degradation of Azo Dyes by Sponge Iron Synergized with Bacterial-Algal Symbiont

考察比较了藻菌共生体系、海绵铁体系、海绵铁协同菌藻共生体系对偶氮染料酸性大红和孔雀石绿的脱色降解效果,结果表明:(1)由小球藻、黄孢原毛平革菌、枯草芽孢杆菌构成的微藻-真菌-细菌体系反应1h对酸性大红和孔雀石绿的脱色率分别为78.03%、93.53%;(2)海绵铁在粒径1.25~1.45mm、投加量50g/L、温度25℃、pH=7的最优实验条件下反应1h对酸性大红和孔雀石绿的脱色率最高可分别达到44.86%、52.78%;(3)海绵铁协同菌藻共生体对酸性大红的脱色和孔雀石绿的脱色率均达95%以上,远高于菌藻共生体和单一海绵铁对两种染料的脱色率,表明海绵铁和菌藻共生体能够有效协同降解偶氮染料。

The effects of algal-bacterial symbiotic system,sponge iron system alone,and sponge iron synergized with bacterial-algal symbiotic system on the decolourisation and degradation of acidic scarlet and malachite green of azo dyes were investigated and compared.The results showed that:(1)the decolourisation rates of acidic scarlet and malachite green by a reaction of microalgae-fungibacterial system consisting of Chlorella,Phanerochaete chrysosporium and Bacillus subtilis for an hour were 78.03% and 93.53%,respectively;(2)their decolourisation rates by a reaction of sponge iron of 1.25~1.45mm in grain size and 50g/L in dosage for an hour could reach 44.86% and 52.78% uppermost,respectively,under the optimal testing conditions of temperature at 25℃ and pH value at 7;and(3)their decolourisation rates by sponge iron synergized with bacterial-algal symbiont could both achieve greater than 95%,far higher than that by bacterial-algal symbiont or sponge iron alone.It has indicated that the sponge iron and bacterial-algal symbiont are capable of eff ectively and synergistically degrading azo dyes.