不同材料对磷和铁的吸附性能研究
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摘要
文章以P、Fe为处理对象,考察了活性炭、沸石、陶粒和石英砂4种材料的吸附特性。结果表明:当pH为7.0时,P的饱和吸附量依次为活性炭(0.14 mg/g)>沸石(0.09 mg/g)>陶粒(0.08 mg/g)>石英砂(0.06 mg/g),Fe的饱和吸附量依次为活性炭(0.79 mg/g)>陶粒(0.76 mg/g)>沸石(0.51 mg/g)>石英砂(0.26 mg/g);颗粒内扩散模型表明各材料对P、Fe的吸附分为表面扩散和内扩散2个阶段,且内扩散为速率控制步骤,吸附饱和时间为240 min;(3)P和Fe的有利吸附条件分别为酸性和碱性,结合实际水体的pH和实验结果,pH为7.0最为合适;随材料投加量增加,P和Fe的单位吸附量减少,但去除率增大;吸附材料的最佳投加量为100 g/L。
The adsorption properties of four kinds of materials which include activated carbon,zeolite,ceramsite and quartz sand were investigated with iron and phosphorus as targeted pollutants.The results indicated that the comparision of saturated adsorption capacity for P was active carbon(0.14 mg/g)>zeolite(0.09 mg/g)>ceramsite(0.08 mg/g)>quartz sand(0.06 mg/g) and the saturated adsorption capacity for Fe was actived carbon(0.79 mg/g)>ceramsite(0.76 mg/g)>zeolite(0.51 mg/g)>quartz sand(0.26 mg/g),respectively,when pH was 7.In addition,the particle diffusion model showed that the adsorption of phosphorus and iron was divided into two stages(the surface diffusion and the internal diffusion),which the internal diffusion was the rate control step with 240 min adsorption saturation time.Acidic and alkaline conditions were favorable to the adsorption of phosphorus and iron,respectively.The best pH was 7 based on actual water sample test and experimental results.It was also found that the unit adsorption quantity of iron and phosphorus decreased with the increase of the amount of materials,but the removal efficiency still increased.The optimum dosage of adsorption materials was 100 g/L.
The adsorption properties of four kinds of materials which include activated carbon,zeolite,ceramsite and quartz sand were investigated with iron and phosphorus as targeted pollutants.The results indicated that the comparision of saturated adsorption capacity for P was active carbon(0.14 mg/g)>zeolite(0.09 mg/g)>ceramsite(0.08 mg/g)>quartz sand(0.06 mg/g) and the saturated adsorption capacity for Fe was actived carbon(0.79 mg/g)>ceramsite(0.76 mg/g)>zeolite(0.51 mg/g)>quartz sand(0.26 mg/g),respectively,when pH was 7.In addition,the particle diffusion model showed that the adsorption of phosphorus and iron was divided into two stages(the surface diffusion and the internal diffusion),which the internal diffusion was the rate control step with 240 min adsorption saturation time.Acidic and alkaline conditions were favorable to the adsorption of phosphorus and iron,respectively.The best pH was 7 based on actual water sample test and experimental results.It was also found that the unit adsorption quantity of iron and phosphorus decreased with the increase of the amount of materials,but the removal efficiency still increased.The optimum dosage of adsorption materials was 100 g/L.
引文
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[3]CAO C J,CHEN Z L,HUANG M S.Study on formation mechanism,and control and preventive measures of eutrophication secondary disasters in urban malodorous-back river[J].Journal of East China Normal University (Natural Science),2015(2):9-20.
[4]DING Q,TANG L H,XIE D.Forming mechanism of black-odor of a campus lake[J].Industrial Water & Wastewater,2012,43(3):28-30.
[5]JI X,ZHANG W,JIANG M,et al.Black-odor water analysis and heavy metal distribution of Yitong River in Northeast China[J].Water Science & Technology,2017,76(8):2051-2064.
[6]潘俊,陈昱奇,董健,等.沈阳城区雨水径流中重金属的分布特征[J].沈阳建筑大学学报(自然科学版),2015(4):730-736.
[7]LU G H,MA Q,ZHANG J H.Analysis of black water aggregation in Taihu Lake[J].Water Science and Engineering,2011,04(4):374-385.
[8]王玉琳,汪靓,华祖林.黑臭水体中不同浓度Fe～(2+)、S～(2-)与DO和水动力关系[J].中国环境科学,2018,38(2):627-633.
[9]ARSLAN A,VELI S.Zeolite 13X for adsorption of ammonium ions from aqueous solutions and hen slaughterhouse wastewaters[J].Journal of the Taiwan Institute of Chemical Engineers,2012,43(3):393-398.
[10]LIU R,JIANG B,CHEN J,et al.Research advances of Pb(II) contaminated wastewater treatment by adsorption method[J].Advances in Environmental Protection,2014,4(2):32-39.
[11]AZZAM M O J.Olive mills wastewater treatment using mixed adsorbents of volcanic tuff,natural clay and charcoal[J].Journal of Environmental Chemical Engineering,2018,6(2):2126-2136.
[12]ZHOU Q,LIAO B,LIN L,et al.Adsorption of Cu(II) and Cd(II) from aqueous solutions by ferromanganese binary oxide-biochar composites.[J].Science of the Total Environment,2018,6 (15):115-112.
[13]SINGH D K,KUMAR V,MOHAN S,et al.Polylysine functionalized graphene aerogel for the enhanced removal of Cr(VI) through adsorption:kinetic,isotherm,and thermodynamic modeling of the process[J].Journal of Chemical & Engineering Data,2017,62(5):1732-1742
[14]WU Z,ZHONG H,YUAN X,et al.Adsorptive removal of methylene blue by rhamnolipid functionalized graphene oxide from wastewater[J].Water Research,2014,6(7):330-344.
[15]DOU X,ZHANG Y,Wang H,et al.Performance of granular zirconium-iron oxide in the removal of fluoride from drinking water[J].Water Research,2011,45(12):3571-3578.
[16]张存芳,王鹏程,吕斯濠,等.活性炭对废水中Cu～(2+)、Ni～(2+)吸附性能的研究[J].山东化工,2018,47(4):144-146.
[17]LIU Y,XIA S,DONG Y,et al.Removal of high-concentration phosphate by calcite:Effect of sulfate and pH[J].Desalination,2012,289(1):66-71.
[18]ZHANG H,LIU L,CHANG Q,et al.Biosorption of Cr(VI) ions from aqueous solutions by a newly isolated Bosea sp.strain Zer-1 from soil samples of a refuse processing plant[J].Canadian Journal of Microbiology,2015,61(6):399.
[19]ASHEKUZZAMAN S M,JIANG J Q.Study on the sorption-desorption-regeneration performance of Ca-,Mg- and CaMg-based layered double hydroxides for removing phosphate from water[J].Chemical Engineering Journal,2014,246(12):97-105.
[20]ZHANG T,WANG Y,KUANG Y,et al.Adsorptive removal of Cr3+,from aqueous solutions using chitosan microfibers immobilized with plant polyphenols as biosorbents with high capacity and selectivity[J].Applied Surface Science,2017,40(4):418-425.