海藻酸钠-氢氧化镧改性Y型分子筛颗粒除氟研究
网络出版日期: 2020-12-15
基金资助
中央高校基本科研业务费专项资金资助(222201817009);国家环境保护公益性行业科研专项(201309021)
Study on fluoride removal by modified Y zeolite particles with sodium alginate-lanthanum hydroxide
Online published: 2020-12-15
为解决除氟吸附剂分离困难、有效成分流失等问题,以海藻酸钠(SA)与氢氧化镧改性Y型分子筛(LHMS)为原料,采用滴球法制备了SA@LHMS颗粒吸附剂,并采用模拟废水对其进行了除氟研究。通过正交实验确定了吸附剂最佳制备条件,并通过间歇吸附实验测试了吸附剂投加量、pH、共存离子等因素对吸附的影响,探究了吸附速率、吸附等温线等吸附性能。结果表明,SA@LHMS吸附速率曲线符合拟二级反应速率方程;吸附等温线符合Ⅱ型等温线,为多分子层吸附;初始pH(3~12)对吸附效果没有显著影响;高浓度共存阴离子(50 mg/L)对吸附过程有一定抑制;1 mol/L和2 mol/L氢氧化钠溶液对SA@LHMS再生效果较好,经3次再生仍然保留较高的吸附能力。SA@LHMS颗粒表面和截面形态以及吸附前后颗粒的表面形态差异明显;吸附前后颗粒表面能谱(EDS)分析以及红外光谱(FT-IR)分析结果显示,吸附过程中溶液中的氟离子(F-)与颗粒表面及内部的羟基(—OH)发生配体交换。
卞晓彤 , 邱兆富 , 杨骥 , 严瑞琪 , 吕树光 . 海藻酸钠-氢氧化镧改性Y型分子筛颗粒除氟研究[J]. 无机盐工业, 2020 , 52(12) : 86 -91 . DOI: 10.11962/1006-4990.2020-0059
In order to solve the problem of the separation of defluorinated adsorbents and the loss of effective components,SA@LHMS adsorbents were prepared with sodium alginate(SA) and lanthanum hydroxide modified Y zeolite (LHMS) as raw materials.The optimum preparation conditions of adsorbent were determined by orthogonal experiment.The effect of factors,such as dosage of adsorbent,pH and co-existing ions etc.,was tested by batch adsorption experiment,and the adsorption performance of adsorption rate and adsorption isotherm was researched.The results showed that the adsorption rate curve of the SA@LHMS conformed to the second-order reaction rate equation.Adsorption isotherm conformed to the type Ⅱ isotherm,multilayer physical adsorption.The initial pH (3~12) had no significant effect on the adsorption effect.High concentration of co-existing anions (50 mg/L) inhibited the adsorption process.The regeneration effect of 1 mol/L and 2 mol/L NaOH solution on SA@LHMS was better,and SA@LHMS still retained a high adsorption capacity after three regeneration.The surface and cross section morphology of SA @LHMS as well as the surface morphology before and after adsorption were significantly different.EDS component analysis and FT-IR spectrum analysis before and after adsorption showed that ligand exchange occur-curred between F- and —OH on the surface and inside of particles during adsorption.
Key words: sodium alginate; particle adsorbent; defluorination; lanthanum hydroxide; Y zeolite
[1] | Cui Y, Zhang B, Ma J, et al. Dopamine receptor D2 gene polymorphism,urine fluoride,and intelligence impairment of children in China:A school-based cross-sectional study[J]. Ecotoxicology and Environmental Safety, 2018,165:270-277. |
[2] | WHO. WHO guidelines approved by the guidelines review committee[M]. Guidelines for Drinking-Water Quality:Fourth Edition Incorporating the First Addendum.Geneva;World Health Organization Copyright(c) World Health Organization 2017. 2017. |
[3] | Zhang L, Huang D. Probabilistic risk assessment of Chinese residents’ exposure to fluoride in improved drinking water in endemic fluorosis areas[J]. Environmental Pollution, 2017,222:118-125. |
[4] | Wang M. Distribution,health risk assessment,and anthropogenic sources of fluoride in farmland soils in phosphate industrial area,southwest China[J]. Environmental Pollution, 2019,249:423-433. |
[5] | Wu C, Wu X, Qian C, et al. Hydrogeochemistry and groundwater quality assessment of high fluoride levels in the Yanchi endorheic region,northwest China[J]. Applied Geochemistry, 2018,98:404-417. |
[6] | Zhou G, Lu Y, Chen L, et al. Low-to-moderate fluoride exposure,relative mitochondrial DNA levels,and dental fluorosis in Chinese children[J]. Environment International, 2019,127:70-77. |
[7] | Aldaco R. Calcium fluoride recovery from fluoride wastewater in a fluidized bed reactor[J]. Water Research, 2007,41(4):810-818. |
[8] | 窦若岸, 陈彬彬, 罗生乔, 等. 化学沉淀法处理高浓度含氟废水的研究[J]. 有机氟工业, 2016(2):9-11,27. |
[9] | 余锋. 含氟废水的处理[J]. 无机盐工业, 2001,33(6):31-32. |
[10] | Maliyekkal S M, Sharma A K, Philip L. Manganese-oxide-coated alumina:A promising sorbent for defluoridation of water[J]. Water Research, 2006,40(19):3497-3506. |
[11] | Meenakshi S, Viswanathan N. Identification of selective ion-exch-ange resin for fluoride sorption[J]. Journal of Colloid and Interface Science, 2007,308(2):438-450. |
[12] | Lu N C, Liu J C. Removal of phosphate and fluoride from waste-water by a hybrid precipitation-microfiltration process[J]. Separa-tion and Purification Technology, 2010,74(3):329-335. |
[13] | 张小东, 赵飞燕, 王永旺, 等. 废水除氟技术研究现状[J]. 无机盐工业, 2019,51(12):6-9,19. |
[14] | Jagtap S, Yenkie M K. Fluoride in drinking water and defluoridation of water[J]. Chemical Reviews, 2012,112(4):2454-2466. |
[15] | Dong S, Wang Y. Characterization and adsorption properties of a lanthanum-loaded magnetic cationic hydrogel composite for fluo-ride removal[J]. Water Research, 2016,88:852-860. |
[16] | Nabbou N, Belhachemi M. Removal of fluoride from groundwater using natural clay(kaolinite):Optimization of adsorption conditions[J]. Comptes Rendus Chimie, 2019,22(2):105-112. |
[17] | Kang D, Yu X, Ge M, et al. Insights into adsorption mechanism for fluoride on cactus-like amorphous alumina oxide microspheres[J]. Chemical Engineering Journal, 2018,345:252-259. |
[18] | Dou X, Zhang Y, Wang H, et al. Performance of granular zirconi-um-iron oxide in the removal of fluoride from drinking water[J]. Water Research, 2011,45(12):3571-3578. |
[19] | Chaudhary M, Maiti A. Defluoridation by highly efficient calcium hydroxide nanorods from synthetic and industrial wastewater[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2019,561:79-88. |
[20] | Raghav S, Nehra S, Kumar D. Biopolymer scaffold of pectin and alginate for the application of health hazardous fluoride removal studies by equilibrium adsorption,kinetics and thermodynamics[J]. Journal of Molecular Liquids, 2019,284:203-214. |
[21] | Nagaraj A, Sadasivuni K K, Rajan M. Investigation of lanthanum impregnated cellulose,derived from biomass,as an adsorbent for the removal of fluoride from drinking water[J]. Carbohydrate Polymers, 2017,176:402-410. |
[22] | Zú?iga-Muro N M, Bonilla-Petriciolet A, Mendoza-Castillo D I, et al. Fluoride adsorption properties of cerium-containing bone char[J]. Journal of Fluorine Chemistry, 2017,197:63-73. |
[23] | Yuan L. Development of lanthanum hydroxide loaded on molecular sieve adsorbent and mechanistic study for phosphate removal[J]. Journal of Alloys and Compounds, 2018,768:953-961. |
[24] | Ertugay M F, Certel M. Moisture sorption isotherms of cereals at different temperatures[J]. Die Nahrung, 2000,44:107-109. |
[25] | Vilar V J P, Botelho C M S. Influence of pH,ionic strength and temperature on lead biosorption by Gelidium and agar extraction algal waste[J]. Process Biochemistry, 2005,40(10):3267-3275. |
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