Degradation of EDTA and novel complexing agents in pulp and paper mill process and waste waters by Fenton's reagent.
Degradation of EDTA and novel complexing agents in pulp and paper mill process and waste waters by Fenton's reagent.
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DOI：
10.1016/j.jhazmat.2007.01.050
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发表时间：
2007-08
影响因子：
13.6
通讯作者：
Kari Pirkanniemi;S. Metsärinne;M. Sillanpää
中科院分区：
文献类型：
--
作者：
Kari Pirkanniemi;S. Metsärinne;M. Sillanpää
采用芬顿法氧化降解蒸馏水、制浆造纸综合废水和ECF漂白废水中乙二胺四乙酸（EDTA）和新型络合剂BCA 5和BCA 6。在温度为60°C、pH为4、H_2O_2：Fe ~（2+）：EDTA = 70：2：1（0.26mM EDTA）或更高的条件下，废水中EDTA的降解率在3 min内可达90%以上。在类似的反应条件下，在加标ECF漂白废水中高达42%的EDTA被降解，仍然高于已发表的结果，表明纸浆和造纸厂废水的生物废水处理是能够的。在pH 3时，EDTA被证明在其它类似条件下容易通过芬顿法降解。因此，芬顿法可作为含EDTA漂白废水生物处理前的预处理方法。此外，BCA 5和BCA 6在pH 3和4下通过芬顿法也证明了它们在降解性方面的优越性。
Fenton's process was used in oxidative degradation of ethylediaminetetraacetic acid (EDTA) and novel complexing agents, namely BCA5 and BCA6, in distilled water and spiked samples of integrated pulp and paper mill waste water and ECF-pulp bleaching effluent. In waste water, over 90% of EDTA was degraded within 3min when temperature was 60°C, pH 4, and molecular ratio of H2O2:Fe2+:EDTA was 70:2:1 (0.26mM EDTA) or higher. In spiked ECF bleaching effluent up to 42% of EDTA was degraded in similar reaction conditions, still higher than published results indicate biological waste water treatment of pulp and paper mill waste water being capable of. In pH 3, EDTA proved readily degradable by Fenton's process in otherwise similar conditions. According to these results, Fenton's process could be used as a pre-treatment method for EDTA-containing bleaching effluents prior to the biological waste water treatment. In addition, BCA5 and BCA6 proved their superiority in terms of degradability also by Fenton's process in both pH 3 and 4.