改性火山岩处理高铁锰矿井水机理分析
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摘要
以火山岩滤料为载体,制备了水合二氧化锰改性滤料用于去除矿井水的铁锰离子。在滤速为7.0 m/h,连续54 h的过滤周期内,改性火山岩对锰离子的去除率达94.8%～99.3%。结合X射线衍射(XRD),扫描电镜-能谱(SEM-EDS)等表征手段,确认火山岩改性后,表面覆盖的水合二氧化锰层具有丰富的表面羟基(以—Mn—OH表示),根据表面配合模式,其羟基中氢能与水中的Mn2+和Fe2+发生表面络合反应,最终Mn2+和Fe2+被表面羟基吸附并交换出氢,从而实现对铁锰离子的去除。
With the volcanic rocks filter material as the carriers,hydrated manganese dioxide modified filter material was prepared to the iron and manganese ion removal from the mine water.When the filtration speed was 7.0 m/h and during a continued 54 h filtration period,the manganese ion removal rate with modified volcanic rocks would be 94.8%~99.3%.The X-ray diffraction,scanning electron microscopy-energy spectrum and other means combined verified that after the volcanic rocks modified,a hydrated manganese dioxide layer covered on the surface of the modified volcanic rocks would have rich surface hydroxyl(—Mn—OH).According to the surface fitting mode,H in hydroxyl could have a surface complexation reaction with Mn2+ and Fe2+ in mine water,finally Mn2+ and Fe2+ could be absorbed by surface hydroxyl and the hydrogen could be replaced.Therefore,the removal of the iron and manganese ion could be realized.
With the volcanic rocks filter material as the carriers,hydrated manganese dioxide modified filter material was prepared to the iron and manganese ion removal from the mine water.When the filtration speed was 7.0 m/h and during a continued 54 h filtration period,the manganese ion removal rate with modified volcanic rocks would be 94.8%~99.3%.The X-ray diffraction,scanning electron microscopy-energy spectrum and other means combined verified that after the volcanic rocks modified,a hydrated manganese dioxide layer covered on the surface of the modified volcanic rocks would have rich surface hydroxyl(—Mn—OH).According to the surface fitting mode,H in hydroxyl could have a surface complexation reaction with Mn2+ and Fe2+ in mine water,finally Mn2+ and Fe2+ could be absorbed by surface hydroxyl and the hydrogen could be replaced.Therefore,the removal of the iron and manganese ion could be realized.
引文
[1]何绪文,杨静,邵立南,等.我国矿井水资源化利用存在的问题与解决对策[J].煤炭学报,2008,33(1):63-66.
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[8]杨威,杨艳玲,李星,等.胶态水合二氧化锰絮凝粒子的结构形貌及其混凝机理[J].环境科学,2007,28(5):1050-1055.
[9]刘锐平,杨艳玲,夏圣骥,等.水合二氧化锰界面特性及其除污染效能[J].环境化学,2005,24(3):338-341.
[10]James W Murray.The Surface Chemistry of Hydrous ManganeseDioxide[J].Journal of Colloid and Interface Science,1974,46(3):357-371.
[11]McKenzie R M.Proton Release During Adsorption of Heavy MetalIons by a Hydrous Manganese Dioxide[J].Geochimica et Cosmo-chimica Acta,1979,43(11):1855-1857.
[12]Brule D G,Brown J R,Bancroft G M,et al.Cation Adsorption byHydrous Manganese Dioxide:A Semi-quantitative X-ray Pho-toelectron Spectroscopic(ESCA)Study[J].Chemical Geology,1980,28:331-339.
[13]戴树桂.环境化学[M].北京:高等教育出版社,1997.
[14]James J Morgan,Werner Stumm.Colloid-chemical Properties ofManganese Dioxide[J].Journal of Colloid Science,1964,19(4):347-359.
[2]邓慧萍,梁超,常春,等.涂铁铝砂对水中有机物去除效果研究[J].同济大学学报,2007,35(8):1080-1084.
[3]王萍,严子春,邱熔处.氯化钠改性沸石吸附水中苯酚的研究[J].中国给水排水,2000,16(4):11-13.
[4]马军,盛力,王立宁.改性石英砂滤料强化过滤处理含藻水[J].中国给水排水,2002,18(10):9-11.
[5]Ioannis A Katsoyiannis,Anastasios I Zouboulis.Removal of Arsenicfrom Contaminated Water Sources by Sorption onto Iron-oxide-coated Polymeric Materials[J].Water Research,2002,36(20):5141-5155.
[6]Preston D R,Vasudevan T V,Bitton G,et al.Novel Approach forModifying Microporous Filters for Virus Concentration from Water[J].Applied and Environmental Microbiology,1988,54(6):1325-1329.
[7]国家环保局《水与废水监测分析方法》编委会.水和废水监测分析方法[M].3版.北京:中国环境科学出版社,1989.
[8]杨威,杨艳玲,李星,等.胶态水合二氧化锰絮凝粒子的结构形貌及其混凝机理[J].环境科学,2007,28(5):1050-1055.
[9]刘锐平,杨艳玲,夏圣骥,等.水合二氧化锰界面特性及其除污染效能[J].环境化学,2005,24(3):338-341.
[10]James W Murray.The Surface Chemistry of Hydrous ManganeseDioxide[J].Journal of Colloid and Interface Science,1974,46(3):357-371.
[11]McKenzie R M.Proton Release During Adsorption of Heavy MetalIons by a Hydrous Manganese Dioxide[J].Geochimica et Cosmo-chimica Acta,1979,43(11):1855-1857.
[12]Brule D G,Brown J R,Bancroft G M,et al.Cation Adsorption byHydrous Manganese Dioxide:A Semi-quantitative X-ray Pho-toelectron Spectroscopic(ESCA)Study[J].Chemical Geology,1980,28:331-339.
[13]戴树桂.环境化学[M].北京:高等教育出版社,1997.
[14]James J Morgan,Werner Stumm.Colloid-chemical Properties ofManganese Dioxide[J].Journal of Colloid Science,1964,19(4):347-359.