【導讀】改性劑只是將HDTMA覆在IOCS的表面，并不改變IOCS的物理性質。后的IOCS表現(xiàn)出對NOM較快的初始吸附和更高的吸附能力。強在較高pH值下更為顯著。與未改性的IOCS相比較，HDTMA-IOCS能夠去除更過的。疏水性物質和NOM分子，且它的吸附能力受濾料本身的鐵強度變化的影響較小。IOCS的這種吸附能力可以通過用NaOH溶液再生或用HDTMA溶液重塑。IOCS吸附可能是一種很有前途的去除NOM替代技術。天然有機物存在于所有的天然水資源中。它是一類同時具有親水基（酚。類和羧酸）和疏水性官能團等復雜有機物的混合物[1]。是無害的，但它可以與消毒劑反應形成消毒副產(chǎn)物[2]。這造成的結果是NOM存在加大了絮凝劑、氧化劑和吸附劑的藥劑使用量和膜的清?；炷み^濾，臭氧/生物過濾和吸附等。在這些工藝中，很多情況下低成本的吸附劑成。為一個相當吸引人的選擇。表面被覆上一層鐵的氧化物的IOCS已被證明是一種有效的。在對NOM的去除上IOCS比其他吸附劑具有以下幾個優(yōu)點：配備簡

　　

【正文】 matter adsorption by iron oxidecoated sands, in: S. Takizawa, F. Kurisu, 18 (Eds.), Southeast Asian Water Environment 3, IWA Publishing, London,2020, pp. 203– 210. [13] G. Newbe, R. Hayes, M. Drikas, Granular activated carbon: Importance of surface properties in the adsorption of naturally occurring organics, Colloids Surf. A 78 (1993) 65– 71. [14] . Aiken, . McKnight, . Thorn, . Thurman, Isolation of hydrophilic organic acids from water using nonionic macroporous resins, Org. (1992) 567– 573. [15] . Kennedy, ,. Yangali, . Heijman, . Schippers,Natural organic matter (NOM) fouling of ultrafiltration membranes: Fractionation of NOM in surface water and characterization by LCOCD, Desalination 178 (2020) 73– 83. [16] . Chin, G. Alken, E. O’ Loughlin, Molecular weight, polydispersity, and spectroscopic properties of aquatic humic substances, Environ. Sci. Technol. 28 (1994) 1853– 1858. [17] Q. Zhou, . Cabaniss, . Maurice, Considerations in the use of highpressure size exclusion chromatography (HPSEC) for determining molecular weights of aquatic humic substances, Water Res. 34 (2020) 3505– 3514. [18] . Stenkamp, . Benjamin, Effect of iron oxide coating on sand filtration, . Water Works Assoc. 86 (1994) 37– 50. [19] . Benjamin, . Sletten, . Bailey, T. Bent, Sorption and filtration of metals using iron oxidecoated sand, Water Res. 30 (1996) 2609– 2620. [20] Y. Xu, L. Axe, Synthesis and characterization of iron oxidecoated silica and its effect on metal adsorption, J. Colloid Interface Sci. 282 (2020) 11– 19. [21] Z. Li, W. Jiang, H. Hong, An FTIR investigation of hexadecyltrimethylammonium intercalation into rectorite, Spectrochim. Acta A 71 (2020) 1525– 1534. [22] . Avena, . Koopal, Kiics of humic acid adsorption at solidwater inter faces, Environ. Sci. Technol. 33 (1999) 2739– 2744. [23] . Chi, . Amy, Kiic study on the sorption of dissolved natural organic 19 matter onto different aquifer materials: the effects of hydrophobicity and func tional groups, J. Colloid Interface Sci. 274 (2020) 380– 391. [24] . Sparks, Environmental Soil Chemistry, 2nd ed., Academic Press, San Diego, 2020. [25] . Ho, Review of secondorder models for adsorption systems, J. Hazard. Mater. 136 (2020) 681– 689. [26] . Kimball, Biology, 6th ed., Wm. C. Brown Publishers, Dubuque, IA, 1994. [27] K. Hayes, C. Papelis, J. Leckie, Modeling ionic strength effects of anion adsorp tion at hydrous oxide/solution interfaces, J. Colloid Interface Sci. 125 (1988) 717– 726. [28] . Gu, J. Schmitt, . Chen, . Liang, . McCarthy, Adsorption and desorption of natural organic matter on iron oxide: mechanisms and models, . Technol. 28 (1994) 38– 46. [29] . Gu, J. Schmitt, . Chen, . Liang, . McCarthy, Adsorption and desorption of different organic matter fractions on iron oxide, Geochim. 59 (1995) 219– 229. [30] . Kim, . Walker, Effect of cationic polymer additives on the adsorption of humic acid onto iron oxide particles, Colloids Surf. A 194 (2020) 123– 131. [31] S. Lee, B. Kwon, M. Sun, J. Cho, Characterization of NOM included in NF and UF membrane permeate, Desalination 173 (2020) 131– 142. [32] A. Genz, A. Kornm252。ller, M. Jekel, Advanced phosphorus removal from membrane filtrates by adsorption on activated aluminium oxide and granulated ferric hydroxide, Water Res. 38 (2020) 3523– 3530. [33] . Edzwald, . Tobiason, Enhanced coagulation: US requirements and a broader view, Water Sci. Technol. 40 (1999) 63– 70.