摘要
采用共沉淀法制备了Mg-Fe双金属氢氧化物材料(Mg-Fe/LDH),用于处理偶氮类染料酸性黑10B,通过改变吸附时间、pH和酸性黑10B废水含量及掺加共存无机阴离子等因素探讨了材料对酸性黑10B的脱色效果。结果表明,处理10mL酸性黑10B,当材料用量20.0mg、处理时间1h、pH在2～11时,酸性黑10B的脱色率可达91.3%以上,且水中共存阴离子对其干扰小。材料对酸性黑10B的吸附过程符合Freundlich等温吸附模式,对酸性黑10B的最大饱和吸附量为95mg·g-1。Mg-Fe/LDH对酸性黑10B有较好的吸附脱色性能,可望在印染废水的脱色方面有较好的应用前景。
In this paper,Mg-Fe layered double hydroxide （Mg-Fe/LDH） was prepared for treating the azo dyes acid blank 10B by co-precipitation. The decolorization capability of the prepared material to the azo dyes acid blank 10B was investigated through batch experiments with some given factors,such as adsorption time,pH,acid blank 10B concentration and present anions. The results indicated that Mg-Fe/LDH had remarkable decolorization capability to acid blank 10B. Besides,the maximum removal percentage of acid blank 10B can reach over 91.3% under the conditions of dose 20 mg,aqueous acid blank 10B 10 mL,1 h treating time and within pH 2～11. Moreover,present anions had little influence. Freundlich adsorption isotherm was found to fit the adsorption process and the maximum adsorption capacity can reach 95 mg·g-1. In a word,Mg-Fe/LDH will be considered as a kind of excellent adsorbent applied in the treatment of dye runoff.
出处
《水处理技术》
CAS
CSCD
北大核心
2010年第11期56-60,共5页
Technology of Water Treatment
基金
国家自然科学基金(50309011)
国家级星火计划(2006EA850047)
教育部留学回国人员科研启动基金(08501041585)
农业部现代农业产业技术体系建设专项资金(nycytx-08)
