火山渣对地下水中Cd~(2+)的吸附效果
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摘要
针对水体中Cd~(2+)污染问题,采用生态安全型火山渣进行吸附低温水体中Cd~(2+)的实验研究,分析火山渣吸附Cd~(2+)的效果及影响因素.结果表明:火山渣是一种具有潜在应用价值的Cd~(2+)吸附剂,1.00g火山渣对10℃,0.5mg/L水体中Cd~(2+)的去除率达97.10%;接近中性环境有利于吸附Cd~(2+);Ca~(2+),Mg~(2+),NO_3~-对火山渣吸附Cd~(2+)有抑制作用,Fe~(2+)和Mn~(2+)的抑制作用较小;当NH_4~+和NO_2~-的质量浓度低于50mg/L时,对吸附无影响,当其质量浓度大于50mg/L时,对吸附有抑制作用;SO24-对吸附作用无影响;质量浓度较大的HCO_3~-对吸附Cd~(2+)有促进作用.
Aiming at the problem of Cd~(2+)pollution in water,the experiment of Cd~(2+)adsorption by ecologically safe scoria in low temperature water was carried out,and we analyzed the effect and influence factors of Cd~(2+)adsorption by scoria.The results show that scoria is a kind of Cd~(2+)adsorbent with potential value.The removal rate reaches 97.10%in 0.5 mg/L Cd~(2+)solution using 1.00 g scoria at 10℃.The neutral environment is conducive to adsorbing Cd~(2+).Ca~(2+),Mg~(2+)and NO_3~-in groundwater can inhibit the adsorption of Cd~(2+)by scoria,while Fe~(2+)and Mn~(2+)have little inhibitory effect.When the mass concentrations of NH_4~+ and NO_2~- are less than 50 mg/L,they have no effects on the adsorption of Cd~(2+) by scoria.When the mass concentrations are more than 50 mg/L,they have inhibitory effects on the absorption.SO_4~(2-) has no effect on the adsorption.HCO_3~- with higher mass concentration has promotion effect on the adsorption of Cd~(2+)by scoria.
Aiming at the problem of Cd~(2+)pollution in water,the experiment of Cd~(2+)adsorption by ecologically safe scoria in low temperature water was carried out,and we analyzed the effect and influence factors of Cd~(2+)adsorption by scoria.The results show that scoria is a kind of Cd~(2+)adsorbent with potential value.The removal rate reaches 97.10%in 0.5 mg/L Cd~(2+)solution using 1.00 g scoria at 10℃.The neutral environment is conducive to adsorbing Cd~(2+).Ca~(2+),Mg~(2+)and NO_3~-in groundwater can inhibit the adsorption of Cd~(2+)by scoria,while Fe~(2+)and Mn~(2+)have little inhibitory effect.When the mass concentrations of NH_4~+ and NO_2~- are less than 50 mg/L,they have no effects on the adsorption of Cd~(2+) by scoria.When the mass concentrations are more than 50 mg/L,they have inhibitory effects on the absorption.SO_4~(2-) has no effect on the adsorption.HCO_3~- with higher mass concentration has promotion effect on the adsorption of Cd~(2+)by scoria.
引文
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[3]仲灿,葛晓敏,倪云,等.植物对土壤Cd,Pb污染的修复与抗性机理研究进展[J].世界林业研究,2017,30(1):37-43.(ZHONG Can,GE Xiaomin,NI Yun,et al.Research Progress of Phytore-mediation Technology and Resistance Mechanism of Plant in Soil Polluted by Cd or Pb[J].World Forestry Research,2017,30(1):37-43.)
[4]SHARMA I,SAMBI S S.Cadmium and Chromium Adsorption on Activated Carbon[J].Indian Chemical Engineer,2014,56(2):97-105.
[5]BRATSKAYA S Y,PESTOV A V,YATLUK Y G,et al.Heavy Metals Removal by Flocculation/Precipitation Using N-(2-Carboxyethyl)chitosans[J].Colloids&Surfaces A Physicochemical&Engineering Aspects,2009,339(1/2/3):140-144.
[6]KULA I,UGURLU M,KARAOGLU H,et al.Adsorption of Cd(Ⅱ)Ions from Aqueous Solutions Using Activated Carbon Prepared from Olive Stone by ZnCl2 Activation[J].Bioresource Technology,2008,99(3):492-501.
[7]CAVACO S A,FERNANDES S,QUINA M M,et al.Removal of Chromium from Electroplating Industry Effluents by Ion Exchange Resins[J].Journal of Hazardous Materials,2007,144(3):634-638.
[8]SANG Yimin,GU Qibao,SUN Tichang,et al.Filtration by a Novel Nanofiber Membrane and Alumina Adsorption to Remove Copper(Ⅱ)from Groundwater[J].Journal of Hazardous Materials,2008,153(1/2):860-866.
[9]SMARA A,DELIMI R,CHAINET E,et al.Removal of Heavy Metals from Diluted Mixtures by a Hybrid Ion-Exchange/Electrodialysis Process[J].Separation&Purification Technology,2008,57(1):103-110.
[10]MOHSEN-NIA M,MONTAZERI P,MODARRESS H.Removal of Cu2+and Ni 2+from Wastewater with a Chelating Agent and Reverse Osmosis Processes[J].Desalination,2007,217(1/2/3):276-281.
[11]YAVUZ M,GODE F,PEHLIVAN E,et al.An Economic Removal of Cu2+and Cr3+on the New Adsorbents:Pumice and Polyacrylonitrile/Pumice Composite[J].Chemical Engineering Journal,2008,137(3):453-461.
[12]PAPANDREOU A D,STOURNARAS C J,PANIAS D,et al.Adsorption of Pb(Ⅱ),Zn(Ⅱ)and Cr(Ⅲ)on Coal Fly Ash Porous Pellets[J].Minerals Engineering,2011,24(13):1495-1501.
[13]CHEN Tan,ZHOU Zeyu,HAN Rong,et al.Adsorption of Cadmium by Biochar Derived from Municipal Sewage Sludge:Impact Factors and Adsorption Mechanism[J].Chemosphere,2015,134:286-293.
[14]ZHANG Shengyu,LU Ying,LIN Xueyu,et al.Removal of Fluoride from Ground Water by Adsorption onto La(Ⅲ)-Al(Ⅲ)Loaded Scoria Adsorbent[J].Applied Surface Science,2014,303:1-5.
[15]陈志宇,张玉玲,司超群,等.火山渣吸附低温水体中SO2-4的效果[J].吉林大学学报(理学版),2018,56(2):464-467.(CHEN Zhiyu,ZHANG Yuling,SI Chaoqun,et al.Effect of Scoria on Adsorption of SO2-4in Low Temperature Water[J].Journal of Jilin University(Science Edition),2018,56(2):464-467.)
[16]ZHANG Yuling,DONG Tianzi,SU Xiaosi,et al.Effect of High Fluoride Groundwater Purification by Lightweight Aggregate Scoria[J].Environmental Earth Sciences,2016,75(1):10-1-10-8.