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WANG Bao-e HU Yong-you 《环境科学学报(英文版)》2007,19(4):451-457
Four materials, sodium carboxymethylcellulose (Na-CMC), sodium alginate (SA), polyvinyl alcohol (PVA), and chitosan (CTS), were prepared as supports for entrapping fungus Aspergillusfumigatus. The adsorption of synthetic dyes, Reactive Brilliant Blue KN- R, and Reactive Brilliant Red K-2BP, by these immobilized gel beads and plain gel beads was evaluated. The adsorption efficiencies of Reactive Brilliant Red K-2BP and Reactive Brilliant Blue KN-R by CTS immobilized beads were 89.1% and 93.5% in 12 h, respectively. The adsorption efficiency by Na-CMC immobilized beads was slightly lower than that of mycelial pellets. But the dye culture mediums were almost completely decolorized in 48 h using the above-mentioned two immobilized beads (exceeding 95%). The adsorption efficiency by SA immobilized beads exceeded 92% in 48 h. PVA-SA immobilized beads showed the lowest adsorption efficiency, which was 79.8% for Reactive Brilliant Red K-2BP and 92.5% for Reactive Brilliant Blue KN-R in 48 h. Comparing the adsorption efficiency by plain gel beads, Na-CMC plain gel beads ranked next to CTS ones. SA and PVA-SA plain gel beads hardly had the ability of adsorbing dyes. Subsequently, the growth of mycelia in Na-CMC and SA immobilized beads were evaluated. The biomass increased continuously in 72 h. The adsorption capacity of Reactive Brilliant Red K-2BP and Reactive Brilliant Blue KN-R by Na-CMC immobilized beads was 78.0 and 86.7 mg/g, respectively. The SEM micrographs show that the surface structure of Na-CMC immobilized bead is loose and finely porous, which facilitates diffusion of the dyes. 相似文献
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棉花染色厂活性染料染色废水处理试验研究 总被引:2,自引:0,他引:2
染料、印染废水水质复杂、色度深,有机污染物含量高等特点,用常规的物化及生物处理比较困难。利用新型的混凝剂,对活性红染料废水进行了脱色处理,色度去除效果比较好,处理后水质达到排放标准。 相似文献
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印染废水的混凝脱色研究 总被引:8,自引:2,他引:6
针对以使用活性染料为主的印染厂的生产废水,选择六种常用的无机混凝剂以及自行研制的脱色剂,进行混凝实验,在确定各自最佳pH、最佳投药量的情况下,比较了COD、色度的去除率,絮体平均沉降速率,产生污泥的体积,污泥密度,以选择最佳效果的药剂品种和混凝条件。结果表明:脱色剂具有高效脱除色度和去除COD的特性,单独使用时,在pH为7.5,投加量为200mg/L的最佳条件下,色度去除率达到95.7%,COD去除率达到54.1%,产生的污泥量很少,与聚合氯化铝配合使用可以提高沉降速率。 相似文献
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活性炭纤维对活性染料的吸附动力学研究 总被引:24,自引:2,他引:22
研究了活性炭纤维从水溶液中吸附4种活性染料(活性艳红K-2BP、活性翠蓝KN-G、活性金黄K-3RP、活性黑KN-B)的吸附特性,从动力学角度探讨了吸附机理.结果表明,活性炭纤维对4种染料的平衡吸附量qe均随着初始浓度和温度的增加而升高,相同条件下,qe的大小顺序为:活性艳红>活性金黄>活性黑>活性翠蓝.吸附过程符合伪二级吸附速率方程,染料分子的空间结构、大小和极性是影响初始吸附速率的主要因素.活性炭纤维对4种染料的吸附活化能都比较低,依次为16 .42、3 .56、5 .21和26 .38 kJ·mol-1,说明吸附过程以物理吸附为主. 相似文献
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