NDLI: Removal of arsenate from water by adsorbents: a comparative case study

Content Provider	Springer Nature Link
Author	Bang, Sunbaek Pena, Maria E. Patel, Manish Lippincott, Lee Meng, Xiaoguang Kim, Kyoung Woong
Copyright Year	2010
Abstract	Laboratory and field filtration experiments were conducted to study the effectiveness of As(V) removal for five types of adsorbent media. The media included activated alumina (AA), modified activated alumina (MAA), granular ferric hydroxide (GFH), granular ferric oxide (GFO), and granular titanium dioxide (TiO2). In laboratory batch and column experiments, the synthetic challenge water was used to evaluate the effectiveness for five adsorbents. The results of the batch experiments showed that the As(V) adsorption decreased as follows at pH 6.5: TiO2 > GFO > GFH > MAA > AA. At pH 8.5, however, As(V) removal decreased in the following order: GFO = TiO2 > GFH > MAA > AA. In column experiments, at pH 6.5, the adsorbed As(V) for adsorbents followed the order: TiO2 > GFO > GFH, whereas at pH 8.5 the order became: GFO = TiO2 > GFH when the challenge water containing 50 μg/L of As(V) was used. Field filtration experiments were carried out in parallel at a wellhead in New Jersey. Before the effluent arsenic concentration increased to 10 μg/L, approximately 58,000 and 41,500 bed volumes of groundwater containing an average of 47 μg/L of As(V) were treated by the filter system packed with GFO and TiO2, respectively. The As(V) adsorption decreased in the following sequence: GFO > TiO2 > GFH > MAA > AA. Filtration results demonstrated that GFO and TiO2 adsorbents could be used as media in small community filtration systems for As(V) removal.
Starting Page	133
Ending Page	141
Page Count	9
File Format	PDF
ISSN	02694042
Journal	Environmental Geochemistry and Health
Volume Number	33
Issue Number	1
e-ISSN	15732983
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-11-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arsenate Adsorption Adsorbent Filtration Public Health/Gesundheitswesen Environmental Chemistry Soil Science & Conservation Terrestrial Pollution Geochemistry Environmental Health
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Geochemistry and Petrology Environmental Engineering Water Science and Technology

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