Application of synthetic iron-oxide coated zeolite for the pollution control of river sediments

Liu, Tongzhou1; Wang, Hong2,3; Zhang, Zhen4; Zhao, Da1

2017-08

10.1016/j.chemosphere.2017.04.023

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Contaminants released from river sediments are catching more attentions for river environmental management, especially when external sources of river pollution have been well controlled. To reduce the contaminant release from sediments, in-situ capping is often applied because of its effective reduction of contaminant flux and minimal disturbance to the surroundings. As an innovative sediment capping material, iron-oxide coated zeolite (IOCZ) was synthesized, characterized, and evaluated in this study. Its performance for the NH4+-N, PO43--P, and S2--S fixation in aqueous solutions was evaluated using batch and fixed-bed column experiments. IOCZ was found effective as a sorbent for NH4+-N, and S2--S with the maximum Langmuir sorption capacities of 6.23 mg N g(-1), 0.966 mg P g(-1), and 1.70 mg S g(-1), respectively. Under the studied conditions, the whole breakthrough process in the fixed bed column could be well described by Thomas model, indicating IOCZ can effectively retard NH4+-N, PO43--P, and S2--S under flowing conditions. In addition, desorption simulative experiments suggested that the retarded pollutants were stable even under some extreme environments such as flooding or tiding. Therefore, IOCZ seems a promising capping material to control the release of NH4+-N, H2PO4-P, and S2--S from river sediments. (C) 2017 Published by Elsevier Ltd.

Sediments Capping Iron oxide coated zeolite Pollutants

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51208145]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000401880500019

PERGAMON-ELSEVIER SCIENCE LTD

20171503565494

Environmental management ; Impurities ; Iron oxides ; Pollution control ; Rivers ; Sediments ; Solutions ; Zeolites

Water Pollution:453 ; Environmental Engineering, General:454.1 ; Soil Mechanics and Foundations:483 ; Inorganic Compounds:804.2 ; Materials Science:951

ENVIRONMENT/ECOLOGY

Web of Science

1.Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen Key Lab Water Resource Utilizat & Enviro, Shenzhen 518055, Peoples R China
2.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.South Univ Sci & Technol China, Engn Innovat Ctr Beijing, Beijing 100083, Peoples R China
4.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

Liu, Tongzhou,Wang, Hong,Zhang, Zhen,et al. Application of synthetic iron-oxide coated zeolite for the pollution control of river sediments[J]. CHEMOSPHERE,2017,180:160-168.

Liu, Tongzhou,Wang, Hong,Zhang, Zhen,&Zhao, Da.(2017).Application of synthetic iron-oxide coated zeolite for the pollution control of river sediments.CHEMOSPHERE,180,160-168.

Liu, Tongzhou,et al."Application of synthetic iron-oxide coated zeolite for the pollution control of river sediments".CHEMOSPHERE 180(2017):160-168.