Selenium Removal from Sulfate-Containing Groundwater Using Granular Layered Double Hydroxide Materials

Man Li; Lisa M. Farmen; Candace Chan

doi:10.1021/acs.iecr.6b04461

Selenium Removal from Sulfate-Containing Groundwater Using Granular Layered Double Hydroxide Materials

Man Li, Lisa M. Farmen, Candace Chan

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Due to recent changes in regulatory discharge limits, selenium removal from electric utility wastewaters is becoming an important issue. In this work, Mg-Al-CO₃ layered double hydroxide (LDH) in granular form was evaluated for treatment of selenium-containing groundwater in small scale column tests. The LDH material showed good capacity for removing selenate from groundwaters that contained very high levels of sulfate and total dissolved solids. Column tests were investigated using the granular LDH to treat groundwater containing trace levels of selenium <2 ppb. Removal of sulfate using chemical pretreatment of the groundwater resulted in about 3× higher selenium loading onto the granular LDH. The structural changes in the media after exhaustion and analysis of the effluent water from the column test were also studied to better understand the species removed by the LDH. These results show that the LDH is a promising sorbent for removing selenium from wastewaters with high levels of sulfate and background species.

Original language	English (US)
Pages (from-to)	2458-2465
Number of pages	8
Journal	Industrial and Engineering Chemistry Research
Volume	56
Issue number	9
DOIs	https://doi.org/10.1021/acs.iecr.6b04461
State	Published - Mar 8 2017

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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title = "Selenium Removal from Sulfate-Containing Groundwater Using Granular Layered Double Hydroxide Materials",

abstract = "Due to recent changes in regulatory discharge limits, selenium removal from electric utility wastewaters is becoming an important issue. In this work, Mg-Al-CO3 layered double hydroxide (LDH) in granular form was evaluated for treatment of selenium-containing groundwater in small scale column tests. The LDH material showed good capacity for removing selenate from groundwaters that contained very high levels of sulfate and total dissolved solids. Column tests were investigated using the granular LDH to treat groundwater containing trace levels of selenium <2 ppb. Removal of sulfate using chemical pretreatment of the groundwater resulted in about 3× higher selenium loading onto the granular LDH. The structural changes in the media after exhaustion and analysis of the effluent water from the column test were also studied to better understand the species removed by the LDH. These results show that the LDH is a promising sorbent for removing selenium from wastewaters with high levels of sulfate and background species.",

author = "Man Li and Farmen, {Lisa M.} and Candace Chan",

note = "Funding Information: The work was funded through the Arizona State University/Salt River Project Joint Research Program, under the project Selenium Removal from SRP Waters with Nano-layered Solid Phase Extraction Materials. Partial support from the National Science Foundation Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (ERC-1449500) is also acknowledged.",

year = "2017",

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doi = "10.1021/acs.iecr.6b04461",

language = "English (US)",

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journal = "Industrial & Engineering Chemistry Research",

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AU - Li, Man

AU - Farmen, Lisa M.

AU - Chan, Candace

N1 - Funding Information: The work was funded through the Arizona State University/Salt River Project Joint Research Program, under the project Selenium Removal from SRP Waters with Nano-layered Solid Phase Extraction Materials. Partial support from the National Science Foundation Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (ERC-1449500) is also acknowledged.

PY - 2017/3/8

Y1 - 2017/3/8

N2 - Due to recent changes in regulatory discharge limits, selenium removal from electric utility wastewaters is becoming an important issue. In this work, Mg-Al-CO3 layered double hydroxide (LDH) in granular form was evaluated for treatment of selenium-containing groundwater in small scale column tests. The LDH material showed good capacity for removing selenate from groundwaters that contained very high levels of sulfate and total dissolved solids. Column tests were investigated using the granular LDH to treat groundwater containing trace levels of selenium <2 ppb. Removal of sulfate using chemical pretreatment of the groundwater resulted in about 3× higher selenium loading onto the granular LDH. The structural changes in the media after exhaustion and analysis of the effluent water from the column test were also studied to better understand the species removed by the LDH. These results show that the LDH is a promising sorbent for removing selenium from wastewaters with high levels of sulfate and background species.

AB - Due to recent changes in regulatory discharge limits, selenium removal from electric utility wastewaters is becoming an important issue. In this work, Mg-Al-CO3 layered double hydroxide (LDH) in granular form was evaluated for treatment of selenium-containing groundwater in small scale column tests. The LDH material showed good capacity for removing selenate from groundwaters that contained very high levels of sulfate and total dissolved solids. Column tests were investigated using the granular LDH to treat groundwater containing trace levels of selenium <2 ppb. Removal of sulfate using chemical pretreatment of the groundwater resulted in about 3× higher selenium loading onto the granular LDH. The structural changes in the media after exhaustion and analysis of the effluent water from the column test were also studied to better understand the species removed by the LDH. These results show that the LDH is a promising sorbent for removing selenium from wastewaters with high levels of sulfate and background species.

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Selenium Removal from Sulfate-Containing Groundwater Using Granular Layered Double Hydroxide Materials

Abstract

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