天然铁锰矿吸附水溶液中Se(Ⅳ)实验研究
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摘要
为了探究铁锰矿对水溶液中Se(Ⅳ)的吸附效果,进行了铁锰矿投加量、pH值、Se(Ⅳ)初始浓度及温度对Se(Ⅳ)吸附的影响实验分析.实验研究表明:铁锰矿能有效吸附水溶液中的Se(Ⅳ).Se(Ⅳ)初始浓度为5.0mg/L时,去除率最大;pH值为2.2时,吸附率最大为98.14%,即在中性偏酸性条件下吸附效果最好;铁锰矿对Se(Ⅳ)的吸附量随着温度的升高而增大,温度升高到60℃时吸附量略有下降,但并不显著;铁锰矿对Se(Ⅳ)的吸附满足Langmuir吸附等温线模型,其最大理论吸附量为6.76mg/g.
In order to investigate the absorption of Se(Ⅳ)in aqueous solution by iron manganese ore,the effect of quantity of manganeae,pH value,initial concentration of Se(Ⅳ)and temperature on sorption of Se(Ⅳ)were studied.And the study showed that Se(Ⅳ)can be effectively absorbed by Fe-Mn ore.Se(Ⅳ)removal rate was the highest when the initial concentration of Se(Ⅳ)was 5.0mg/L.When pH value was 2.2,the removal rate reached the highest of 98.14%.The sorption capacity increased with the increase of the temperature,while temperature was improved to 60 ℃,it decreased slightly.The Langmuir isotherm equation could be used to describe the experimental data.The fitting results indicated that the max Se(Ⅳ)sorption capacity values was 6.76mg/g.
In order to investigate the absorption of Se(Ⅳ)in aqueous solution by iron manganese ore,the effect of quantity of manganeae,pH value,initial concentration of Se(Ⅳ)and temperature on sorption of Se(Ⅳ)were studied.And the study showed that Se(Ⅳ)can be effectively absorbed by Fe-Mn ore.Se(Ⅳ)removal rate was the highest when the initial concentration of Se(Ⅳ)was 5.0mg/L.When pH value was 2.2,the removal rate reached the highest of 98.14%.The sorption capacity increased with the increase of the temperature,while temperature was improved to 60 ℃,it decreased slightly.The Langmuir isotherm equation could be used to describe the experimental data.The fitting results indicated that the max Se(Ⅳ)sorption capacity values was 6.76mg/g.
引文
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[3]鲁安怀,卢晓英,任子平,等.天然铁锰氧化物及氢氧化物环境矿物学研究[J].地学前缘,2000,7(2):473-480.Lu Anhuai,Lu Xiaoyin,Ren Ziping,et al.New advances in invironmental mineralogy of natural oxides and hydroxides of iron and manganese[J].Earth Science Frontiers,2000,7(2):473-480.(in Chinese)
[4]庞禄.铁锰复合氧化物对重金属铬(III)、砷(III)的吸附/氧化特征研究[D].重庆:西南大学,2014.
[5]孔令刚.铁锰矿物材料对微污染水体中几种重金属离子的吸附性能研究[D].上海:同济大学,2007.
[6]王莉霄,钱天伟,丁庆伟,等.球磨法制备黄铁矿粉末及其表征[J].中北大学学报,2014,35(6):730-732.Wang Lixiao,Qian Tianwei,Ding Qingwei,et al.Preparation and characterization of pyrite nanoparticles by ball milling[J].Journal of north university of China(Natural Science Edition),2014,35(6):730-732.(in Chinese)
[7]刘振中,邓慧萍.负载铁锰氧化物的活性炭除砷酸盐的性能研究[J].哈尔滨工业大学学报,2010,42(8):1318-1322.Liu Zhenzhong,Deng Huiping.Arsenate removal performance on GAC impregnated with Fe-Mn oxide[J].Journal of HarBin Institute of Technology,2010,42(8):1318-1322.(in Chinese)
[8]张小宝,刘宏芳,钱天伟,等.零价纳米铁去除ReO4-的研究[J].环境污染与防治,2011,33(5):8-10.Zhang Xiaobao,Liu Hong fang,Qian Tianwei,et al.Research on the removal of ReO4-by zerovalent nanoiron[J].Environmental Pollution and Control,2011,33(5):8-10.(in Chinese)
[9]常方方,曲久辉,刘锐平,等.铁锰复合氧化物的制备及其吸附除砷性能[J].环境科学学报,2006,26(11):1770-1773.Chang Fangfang,Qu Jiuhui,Liu Ruiping,et al.Preparation of Fe-Mn bimetal oxide adsorbent and its adsorp tion characteristics of arsenic[J].Acta Scientiae Circum stantiae,2006,26(11):1770-1773.(in Chinese)
[10]张闵强,王海芳,侯彬,等.铁锰复合氧化物处理含镉废水的性能研究[J].化工中间体,2014(3):39-44.Zhang Mingqiang,Wang Haifang,Hou Bing,et al.Study on the cadmium removal from aqueous solution using Fe-Mn bimetal oxide[J].Chenmical Intermediate,2014(3):39-44.(in Chinese)
[11]王丹,刘宏芳,钱天伟,等.天然黄铁矿对水溶液中硒酸根的吸附性能研究[J].环境污染与防治,2014,36(3):30-34.Wang Dan,Liu Hongfang,Qian Tianwei,et al.Adsorption behavior of natural pyrite for removal of selenium ions from aqueous solution[J].Acta Scientiae Circum stantiae,2014,36(3):30-34.(in Chinese)
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