Preparation of a permanent magnetic hypercrosslinked resin and assessment of its ability to remove organic micropollutants from drinking water

Abstract

A rapid and effective method based on a novel permanent magnetic hypercrosslinked resin W150 was proposed for the removal of organic micropollutants in drinking water. W150 was prepared by suspension and post-crosslinking reaction and found to possess a high specific surface area of 1149.7 m²·g^-1, a small particle size of 50 µm to 100 µm, and a saturation magnetization as high as 8 emu·g^-1. W150 was used to eliminate nitrofurazone (NFZ) and oxytetracycline (OTC) from drinking water compared with commercial adsorbents XAD-4 and F400D. The adsorption kinetics of NFZ and OTC onto the three adsorbents well fitted the pseudo-second-order equation (r>0.972), and the adsorption isotherms were all well described by the Freundlich equation (r>0.851). Results showed that the reduction in adsorbent size and the enlargement in sorbent pores both accelerated adsorption. Moreover, the effect of particle size on adsorption was more significant than that of pore width. Given that the smallest particle size and the highest specific surface area were possessed by W150, it had the fastest adsorption kinetics and largest adsorption capacity for NFZ (180 mg·g^-1) and OTC (200 mg·g^-1). For the adsorbents with dominant micropores, the sorption of large-sized adsorbates decreased because of the inaccessible micropores. The solution pH and ionic strength also influenced adsorption.

Keywords

permanent magnetic resin / organic micropollutant / pore size / molecular size / adsorption

References

[1] Bound J P, Voulvoulis N. Pharmaceuticals in the aquatic environment—a comparison of risk assessment strategies. Chemosphere, 2004, 56(11): 1143–1155

[2] Prado N, Ochoa J, Amrane A. Biodegradation by activated sludge and toxicity of tetracycline into a semi-industrial membrane bioreactor. Bioresource Technology, 2009, 100(15): 3769–3774

[3] Batt A L, Kim S, Aga D S. Comparison of the occurrence of antibiotics in four full-scale wastewater treatment plants with varying designs and operations. Chemosphere, 2007, 68(3): 428–435

[4] Kosutic K, Dolar D, Asperger D, Kunst B. Removal of antibiotics from a model wastewater by RO/NF membranes. Separation and Purification Technology, 2007, 53(3): 244–249

[5] Wang P, He Y L, Huang C H. Reactions of tetracycline antibiotics with chlorine dioxide and free chlorine. Water Research, 2011, 45(4): 1838–1846

[6] Wang Y, Zhang H, Zhang J, Lu C, Huang Q, Wu J, Liu F. Degradation of tetracycline in aqueous media by ozonation in an internal loop-lift reactor. Journal of Hazardous Materials, 2011, 192(1): 35–43

[7] Ji L, Chen W, Bi J, Zheng S, Xu Z, Zhu D, Alvarez P J. Adsorption of tetracycline on single-walled and multi-walled carbon nanotubes as affected by aqueous solution chemistry. Environmental Toxicology and Chemistry, 2010, 29(12): 2713–2719

[8] Ji L, Wan Y, Zheng S, Zhu D. Adsorption of tetracycline and sulfamethoxazole on crop residue-derived ashes: implication for the relative importance of black carbon to soil sorption. Environmental Science & Technology, 2011, 45(13): 5580–5586

[9] Richter M K, Sander M, Krauss M, Christl I, Dahinden M G, Schneider M K, Schwarzenbach R P. Cation binding of antimicrobial sulfathiazole to leonardite humic acid. Environmental Science & Technology, 2009, 43(17): 6632–6638

[10] Kahle M, Stamm C. Sorption of the veterinary antimicrobial sulfathiazole to organic materials of different origin. Environmental Science & Technology, 2007, 41(1): 132–138

[11] Xue S, Zhao Q L, Wei L L, Hui X J, Ma X P, Lin Y Z. Fluorescence spectroscopic studies of the effect of granular activated carbon adsorption on structural properties of dissolved organic matter fractions. Frontiers of Environmental Science & Engineering, 2013, 6(6): 784–796

[12] Ma Y, Gao N Y, Chu W H, Li C. Removal of phenol by powdered activated carbon adsorption. Frontiers of Environmental Science & Engineering, 2013, 7(2): 158–165

[13] Zhou Q, Wang M Q, Li A M, Shuang C D, Zhang M C, Liu X H, Wu L Y. Preparation of a novel anion exchange group modified hyper-crosslinked resin for the effective adsorption of both tetracycline and humic acid. Frontiers of Environmental Science & Engineering, 2013, 7(2): 412–419

[14] Tsyurup M P, Davankov V A. Porous Structure of Hypercrosslinked Polystyrene: State-of-the-Art Mini-Review. Reactive & Functional Polymers, 2006, 66(7): 768–779

[15] Valderrama C, Cortina J L, Farran A, Gamisans X, Lao C. Kinetics of sorption of polyaromatic hydrocarbons onto granular activated carbon and Macronet hyper-cross-linked polymers (MN200). Journal of Colloid and Interface Science, 2007, 310(1): 35–46

[16] Zhou Y, Shuang C D, Zhou Q, Zhang M C, Li P H, Li A M. Preparation and application of a novel magnetic anion exchange resin for selective nitrate removal. Chinese Chemical Letters, 2012, 23(7): 813–816

[17] Shuang C, Li P, Li A, Zhou Q, Zhang M, Zhou Y. Quaternized magnetic microspheres for the efficient removal of reactive dyes. Water Research, 2012, 46(14): 4417–4426

[18] Zhou Q, Zhang M C, Shuang C D, Li Z Q, Li A M. Preparation of a novel magnetic powder resin for the rapid removal of tetracycline in the aquatic environment. Chinese Chemical Letters, 2012, 23(6): 745–748

[19] Zhou Q, Li Z Q, Shuang C D, Li A M, Zhang M C, Wang M Q. Efficient removal of tetracycline by reusable magnetic microspheres with a high surface area. Chemical Engineering Journal, 2012, 210: 350–356

[20] Zhou Q, Li Z Q, Shuang C D, Li A M, Wang M Q, Zhang M C. Preparation of acid-resistant magnetic adsorbent for effective removal of p-nitrophenol. Chinese Chemical Letters, 2012, 23(9): 1079–1082

[21] Zhang M, Zhou Q, Li A, Shuang C, Wang W, Wang M. A magnetic sorbent for the efficient and rapid extraction of organic micropollutants from large-volume environmental water samples. Journal of Chromatography. A, 2013, 1316: 44–52

[22] Martin J E, Venturini E, Odinek J, Anderson R A. Anisotropic magnetism in field-structured composites. Physical Review, 2000, 61(3): 2818–2830

[23] Zhang M C, Li A M, Zhou Q, Shuang C D, Zhou W W, Wang M Q. Effect of pore size distribution on tetracycline adsorption using magnetic hypercrosslinked resins. Microporous and Mesoporous Materials, 2014, 184: 105–111

[24] Yang W, Zheng F, Xue X, Lu Y. Investigation into adsorption mechanisms of sulfonamides onto porous adsorbents. Journal of Colloid and Interface Science, 2011, 362(2): 503–509

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