Goethite as an efficient heterogeneous Fenton catalyst for the degradation of methyl orange
Goethite as an efficient heterogeneous Fenton catalyst for the degradation of methyl orange
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DOI：
10.1016/j.cattod.2015.01.012
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发表时间：
2015-09
期刊：
影响因子：
5.3
通讯作者：
Yan Wang;Yaowen Gao;Lulu Chen;Hui Zhang
中科院分区：
文献类型：
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作者：
Yan Wang;Yaowen Gao;Lulu Chen;Hui Zhang
以针铁矿为催化剂，采用非均相芬顿法降解橙子。通过在三个连续循环中测量颜色去除来评价催化剂稳定性。采用XRD、SEM和FTIR等技术对反应前后的针铁矿样品进行了表征。考察了pH值、H2O2浓度、催化剂加入量和染料初始浓度等因素对MO脱色的影响。结果表明，MO脱色率随H2O2浓度和催化剂投加量的增加而增加，随MO初始浓度的增加而降低。脱色的最佳初始pH为3。急性毒性实验表明，随着氧化程度的加深，大型蚤的死亡率逐渐降低。
The heterogeneous Fenton process was employed to degrade methyl orange (MO) using goethite as the catalyst. The catalyst stability was evaluated by measuring color removal in three successive cycles. The goethite samples before and after the reaction were characterized by XRD, SEM and FTIR techniques. The effect of major parameters, including pH, H2O2concentration, catalyst addition and initial dye concentration on the decolorization of MO was investigated. The results indicated that the MO decolorization rate increased with the increase of H2O2concentration and catalyst addition, but decreased with the increase of initial MO concentration. The optimal initial pH for the decolorization was found as 3. The acute toxicity experiments illustrated that theDaphnia magnamortality declined with the progress of the oxidation.