Evaluation of nitrate removal properties of magnetic anion-exchange resins in water

被引：11

作者：

Wang, Baijun ^{[1
,2
,3
]}

Song, Haiou ^{[1
,2
,3
]}

Wang, Changming ^{[1
,2
,3
]}

Shuang, Chendong ^{[1
,2
,3
]}

Li, Qiang ^{[1
,2
,3
]}

Li, Aimin ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China

[2] Natl Engn Res Ctr Organ Pollut Control & Resource, Nanjing 210023, Jiangsu, Peoples R China

[3] Collaborat Innovat Ctr Adv Technol & Equipment Wa, Nanjing 210023, Jiangsu, Peoples R China

来源：

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2016年 / 91卷 / 05期

关键词：

magnetic ion exchange resin; nitrate; competitive adsorption; dissolved organic matter; groundwater; DISSOLVED ORGANIC-MATTER; ION-EXCHANGE; HUMIC-ACID; AQUEOUS-SOLUTIONS; WASTE-WATER; METAL-IONS; ADSORPTION; KINETICS; EQUILIBRIUM; GROUNDWATER;

D O I：

10.1002/jctb.4723

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

BACKGROUNDHigh concentrations of nitrates in drinking water can lead to various types of cancers and to risks of contracting diseases. Two magnetic anion-exchange resins (MD217 and MD218) were synthesized to remove nitrate quickly from aqueous solution. RESULTSResults show that nitrate adsorption onto the resins fitted both pseudo-first-order and pseudo-second-order kinetic models. The equilibrium adsorption time for both resins was approximate to 10 min with the adsorption behaviour following the Freundlich adsorption isotherm model. MD218 showed high adsorption capacity and higher selectivity for nitrate in the presence of dissolved organic matter (DOM). MD217 showed higher selectivity in the presence of competing anions such as SO42- in aqueous solution. Among the DOMs examined, humic acid affected nitrate removal the most, which can be explained well by a mechanism based on electrostatic interaction. CONCLUSIONSUtilization of the resins in purification of water samples showed that both could be used for the treatment of ion-containing polluted ground and surface waters. (c) 2015 Society of Chemical Industry

引用

页码：1306 / 1313

页数：8

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