1. Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
The backwashing residuals from iron and manganese removal biological filter of underground waters was made into granular adsorbent (GA) and magnetic powder adsorbent (MPA) to solve the problem that it is difficult to separate the exhausted backwashing sludge powder adsorbent (BSPA) and treated water. The arsenic removal capability of BSPA、GA and MPA were compared. And their structure and surface feature were compared by SEM, TED, XRD, BET and FTIR to find the cause of difference in arsenic removal capability among these three adsorbents. Results showed that the maximum As (V) adsorption capacity of BSPA, GA and MPA were 40.980, 5.048 and 8.694mg/g respectively. As it suggested, the As (V) adsorption capacity of GA and MPA decreased compared to BSPA. BSPA was a mixture with amorphous structure, lepidocrocite was the main ingredient, goethite and poor crystallized ferrihydrite also mixed in it. The XRD spectrum of GA appeared crystal diffraction peaks of quartz crystal and a small amount of hematite, while the main component of MPA was maghemite with high crystallinity. There are hydroxyl functional groups that are conducive to adsorption in all three materials. The specific surface areas of BSPA, MPA and GA were 253.150, 238.660 and 43.803m2/g respectively. Phase changes and increase of crystallinity, reduction of surface hydroxyl group and decrease of specific surface area may be the main factors lower the adsorption capacity of GA and MPA compared with BSPA.
曾辉平, 尹灿, 李冬, 吕赛赛, 赵运新, 张杰. 基于铁锰泥的除砷吸附剂性能比较及吸附机理[J]. 中国环境科学, 2018, 38(9): 3373-3379.
ZENG Hui-ping, YIN Can, LI Dong, LV Sai-sai, ZHAO Yun-xin, ZHANG Jie. Performance comparison and adsorption mechanism of arsenic removal adsorbents made of backwashing sludge from biofilter for iron and manganese removal. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(9): 3373-3379.
Shan C, Tong M. Efficient removal of trace arsenite through oxidation and adsorption by magnetic nanoparticles modified with Fe-Mn binary oxide[J]. Water Research, 2013,47(10):3411-3421.
Ociński D, Jacukowicz-Sobala I, Mazur P, et al. Water treatment residuals containing iron and manganese oxides for arsenic removal from water-characterization of physicochemical properties and adsorption studies[J]. Chemical Engineering Journal, 2016,294:210-221.
Zhu J, Baig S A, Sheng T, et al. Fe3O4 and MnO2 assembled on honeycomb briquette cinders (HBC) for arsenic removal from aqueous solutions[J]. Journal of Hazardous Materials, 2015,286:220-228.
[15]
Almasri D A, Rhadfi T, Atieh M A, et al. High performance hydroxyiron modified montmorillonite nanoclay adsorbent for arsenite removal[J]. Chemical Engineering Journal, 2018,335(Supplement C):1-12.
Lin S, Yang H, Na Z, et al. A novel biodegradable arsenic adsorbent by immobilization of iron oxyhydroxide (FeOOH) on the root powder of long-root eichhornia crassipes[J]. Chemosphere, 2018,192(Supplement C):258-266.
[19]
邹昊辰.硅藻土负载铁氧化物对砷吸附的研究[D]. 长春:吉林大学, 2013.
[20]
Wang T, Zhang L, Wang H, et al. Controllable synthesis of hierarchical porous Fe3O4 particles mediated by poly (diallyldimethylammonium chloride) and their application in arsenic removal[J]. Applied Materials & Interfaces, 2013,5(23):12449-12459.
[21]
Zhong L S, Hu J S, Liang H P, et al. Self-assembled 3D flowerlike iron oxide nanostructures and their application in water treatment[J]. Advanced Materials, 2006,18(18):2426-2431.
[22]
Wu Z, Li W, Webley P A, et al. ChemInform abstract:general and controllable synthesis of novel mesoporous magnetic iron oxide@carbon encapsulates for efficient arsenic removal[J]. Advanced Materials, 2012,43(14):485-491.
[23]
Jin Y, Liu F, Tong M, et al. Removal of arsenate by cetyltrimethylammonium bromide modified magnetic nanoparticles[J]. Journal of Hazardous Materials, 2012,227-228:461-468.
[24]
Feng L, Cao M, Ma X, et al. Superparamagnetic high-surface-area Fe3O4nanoparticles as adsorbents for arsenic removal[J]. Journal of Hazardous Materials, 2012,217-218:439-446.
Jain A, Raven K P, Loeppert R H. Arsenite and arsenate adsorption on ferrihydrite:surface charge reduction and net OH-release stoichiometry[J]. Environmental Science & Technology, 1999,33(8):1179-1184.
Pecini E M, Springer V, Brigante M, et al. Arsenate interaction with the surface of nanomagnetic particles. High adsorption or full release[J]. Journal of Environmental Chemical Engineering, 2017,5(5):4917-4922.
Qi J, Zhang G, Li H. Efficient removal of arsenic from water using a granular adsorbent:Fe-Mn binary oxide impregnated chitosan bead[J]. Bioresource Technology, 2015,193(Supplement C):243-249.
[36]
Mayo J T, Yavuz C, Yean S, et al. The effect of nanocrystalline magnetite size on arsenic removal[J]. Science and Technology of Advanced Materials, 2007,8(1):71-75.