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Titanium Coagulation Simplified Removal Procedure and Alleviated Membrane Fouling in Treatment of Antimony-Containing Wastewater
https://orcid.org/0000-0001-5013-5438
The removal of antimony (Sb) from textile and dyeing wastewater is a challenging task. To meet the discharge limit and the demand for water reuse, the currently available treatment process was complicated: first, coagulation with polyaluminum chloride (PAC) and polyacrylamide (PAM) prior to membrane filtration to remove turbidity and then coagulation with polyferric sulfate (PFS) after membrane filtration to remove Sb from the concentrate. Such a process is troublesome in operation and generates a large amount of hazardous sludge. Here, we report that using a titanium xerogel coagulant (TXC) prior to membrane filtration could simultaneously remove the turbidity and the residual Sb in one-step. With TXC as the coagulants, no after-membrane coagulation was needed. Moreover, the TXC coagulation significantly alleviated the membrane fouling. A 24-day running of a pilot-scale test demonstrates that addition of 60 mg/L of TXC reduced the residual Sb concentration in the effluent from 226–894 μg/L to below the discharge limit (<50 μg/L). Meanwhile, the operating time of the ultrafiltration (UF)–reverse osmosis (RO) membrane system was prolonged, because of alleviated membrane fouling. This work indicates that TXC coagulation is a promising strategy for the treatment of Sb-containing wastewater. The simplified treatment procedure and the alleviated membrane fouling are helpful in reducing the processing costs for water reuse.
Titanium Coagulation Simplified Removal Procedure and Alleviated Membrane Fouling in Treatment of Antimony-Containing Wastewater
https://orcid.org/0000-0001-5013-5438
The removal of antimony (Sb) from textile and dyeing wastewater is a challenging task. To meet the discharge limit and the demand for water reuse, the currently available treatment process was complicated: first, coagulation with polyaluminum chloride (PAC) and polyacrylamide (PAM) prior to membrane filtration to remove turbidity and then coagulation with polyferric sulfate (PFS) after membrane filtration to remove Sb from the concentrate. Such a process is troublesome in operation and generates a large amount of hazardous sludge. Here, we report that using a titanium xerogel coagulant (TXC) prior to membrane filtration could simultaneously remove the turbidity and the residual Sb in one-step. With TXC as the coagulants, no after-membrane coagulation was needed. Moreover, the TXC coagulation significantly alleviated the membrane fouling. A 24-day running of a pilot-scale test demonstrates that addition of 60 mg/L of TXC reduced the residual Sb concentration in the effluent from 226–894 μg/L to below the discharge limit (<50 μg/L). Meanwhile, the operating time of the ultrafiltration (UF)–reverse osmosis (RO) membrane system was prolonged, because of alleviated membrane fouling. This work indicates that TXC coagulation is a promising strategy for the treatment of Sb-containing wastewater. The simplified treatment procedure and the alleviated membrane fouling are helpful in reducing the processing costs for water reuse.
Titanium Coagulation Simplified Removal Procedure and Alleviated Membrane Fouling in Treatment of Antimony-Containing Wastewater
https://orcid.org/0000-0001-5013-5438
The removal of antimony (Sb) from textile and dyeing wastewater is a challenging task. To meet the discharge limit and the demand for water reuse, the currently available treatment process was complicated: first, coagulation with polyaluminum chloride (PAC) and polyacrylamide (PAM) prior to membrane filtration to remove turbidity and then coagulation with polyferric sulfate (PFS) after membrane filtration to remove Sb from the concentrate. Such a process is troublesome in operation and generates a large amount of hazardous sludge. Here, we report that using a titanium xerogel coagulant (TXC) prior to membrane filtration could simultaneously remove the turbidity and the residual Sb in one-step. With TXC as the coagulants, no after-membrane coagulation was needed. Moreover, the TXC coagulation significantly alleviated the membrane fouling. A 24-day running of a pilot-scale test demonstrates that addition of 60 mg/L of TXC reduced the residual Sb concentration in the effluent from 226–894 μg/L to below the discharge limit (<50 μg/L). Meanwhile, the operating time of the ultrafiltration (UF)–reverse osmosis (RO) membrane system was prolonged, because of alleviated membrane fouling. This work indicates that TXC coagulation is a promising strategy for the treatment of Sb-containing wastewater. The simplified treatment procedure and the alleviated membrane fouling are helpful in reducing the processing costs for water reuse.
Titanium Coagulation Simplified Removal Procedure and Alleviated Membrane Fouling in Treatment of Antimony-Containing Wastewater
Wu, Bingdang (author) / Li, Jingbiao (author) / Gan, Yonghai (author) / Li, Haojie (author) / Dong, Linhui (author) / Zhang, Shujuan (author)
ACS ES&T Engineering ; 1 ; 1094-1103
2021-07-09
Article (Journal)
Electronic Resource
English
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