Anomalous but massive removal of two organic dye pollutants simultaneously

Zilin Meng; Yihe Zhang; Zhilei Zhang; Qian Zhang; Paul K. Chu; Sridhar Komarneni; Fengzhu Lv

doi:10.1016/j.jhazmat.2016.06.044

Anomalous but massive removal of two organic dye pollutants simultaneously

Zilin Meng, Yihe Zhang, Zhilei Zhang, Qian Zhang, Paul K. Chu, Sridhar Komarneni, Fengzhu Lv

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

31 Scopus citations

Abstract

A one-pot method to remove two organic dye contaminants and alkali simultaneously from alkaline wastewater was developed by forming Zn-Al layered double hydroxide (ZnAl-LDH). Using this process, not only alkali but also methyl orange (MO), an anionic contaminant was totally removed from wastewater. In addition, cationic contaminant, methylene blue (MB) was also removed effectively while maintaining the high removal efficiency of MO. The removal efficiency of MO was almost 100% and the pH of the treated wastewater decreased from 12 to 7.38. The charge-limited removal process, molecular arrangement of the contaminants in LDHs, and the anomalous removal mechanism were analyzed experimentally and through simulation. After MO accumulated in the interlayers of LDH by electrostatic interaction, MB entered and trapped by hydrophobic interaction.

Original language	English (US)
Pages (from-to)	54-60
Number of pages	7
Journal	Journal of Hazardous Materials
Volume	318
DOIs	https://doi.org/10.1016/j.jhazmat.2016.06.044
State	Published - Nov 15 2016

All Science Journal Classification (ASJC) codes

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2016.06.044

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title = "Anomalous but massive removal of two organic dye pollutants simultaneously",

abstract = "A one-pot method to remove two organic dye contaminants and alkali simultaneously from alkaline wastewater was developed by forming Zn-Al layered double hydroxide (ZnAl-LDH). Using this process, not only alkali but also methyl orange (MO), an anionic contaminant was totally removed from wastewater. In addition, cationic contaminant, methylene blue (MB) was also removed effectively while maintaining the high removal efficiency of MO. The removal efficiency of MO was almost 100% and the pH of the treated wastewater decreased from 12 to 7.38. The charge-limited removal process, molecular arrangement of the contaminants in LDHs, and the anomalous removal mechanism were analyzed experimentally and through simulation. After MO accumulated in the interlayers of LDH by electrostatic interaction, MB entered and trapped by hydrophobic interaction.",

author = "Zilin Meng and Yihe Zhang and Zhilei Zhang and Qian Zhang and Chu, {Paul K.} and Sridhar Komarneni and Fengzhu Lv",

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T1 - Anomalous but massive removal of two organic dye pollutants simultaneously

AU - Meng, Zilin

AU - Zhang, Yihe

AU - Zhang, Zhilei

AU - Zhang, Qian

AU - Chu, Paul K.

AU - Komarneni, Sridhar

AU - Lv, Fengzhu

PY - 2016/11/15

Y1 - 2016/11/15

N2 - A one-pot method to remove two organic dye contaminants and alkali simultaneously from alkaline wastewater was developed by forming Zn-Al layered double hydroxide (ZnAl-LDH). Using this process, not only alkali but also methyl orange (MO), an anionic contaminant was totally removed from wastewater. In addition, cationic contaminant, methylene blue (MB) was also removed effectively while maintaining the high removal efficiency of MO. The removal efficiency of MO was almost 100% and the pH of the treated wastewater decreased from 12 to 7.38. The charge-limited removal process, molecular arrangement of the contaminants in LDHs, and the anomalous removal mechanism were analyzed experimentally and through simulation. After MO accumulated in the interlayers of LDH by electrostatic interaction, MB entered and trapped by hydrophobic interaction.

AB - A one-pot method to remove two organic dye contaminants and alkali simultaneously from alkaline wastewater was developed by forming Zn-Al layered double hydroxide (ZnAl-LDH). Using this process, not only alkali but also methyl orange (MO), an anionic contaminant was totally removed from wastewater. In addition, cationic contaminant, methylene blue (MB) was also removed effectively while maintaining the high removal efficiency of MO. The removal efficiency of MO was almost 100% and the pH of the treated wastewater decreased from 12 to 7.38. The charge-limited removal process, molecular arrangement of the contaminants in LDHs, and the anomalous removal mechanism were analyzed experimentally and through simulation. After MO accumulated in the interlayers of LDH by electrostatic interaction, MB entered and trapped by hydrophobic interaction.

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Anomalous but massive removal of two organic dye pollutants simultaneously

Abstract

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