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Liu Z, Shi Q, Bao Y, Meng X, Meng W. Arsenate removal using titanium dioxide-doped cementitious composites: Mixture design, mechanisms, and simulated sewer application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 854:158754. [PMID: 36113790 DOI: 10.1016/j.scitotenv.2022.158754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/30/2022] [Accepted: 09/09/2022] [Indexed: 06/15/2023]
Abstract
Arsenate (As(V)) in municipal wastewater leads to a public health problem due to its contamination of natural water sources. Here, we proposed to use sewer pipe made of TiO2-doped cementitious composite (TCC) for As(V) removal from municipal wastewater. The optimum composition of TCC, the performance for As(V) removal in the simulated sewer system, and the molecular-level As(V) removal mechanisms were investigated. To obtain the optimum composition, variables were adjusted to maximize the As(V) removal using TCC. Results show that the TiO2 and water contents were the dominant factors. Simulated sewer pipes made of TCC removed As(V) from 100 μg/L to <10 μg/L, which performed better than plain cementitious composite. Moreover, extended X-ray absorption fine structure (EXAFS) analysis indicates that both precipitation and adsorption contribute to the As(V) removal by TCC, while the adsorption is more significant with a lower As(V) concentration (i.e., 1 mg/L). This is the first study evaluating the feasibility to apply TCC for As(V) removal from sewer wastewater. The optimized composition, simulation results, and molecular-level mechanism gained from this study are useful to the future design of TCC for As(V) removal, especially for sewer systems.
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Affiliation(s)
- Zhuo Liu
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA
| | - Qiantao Shi
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA; Center for Environmental Systems, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA.
| | - Yi Bao
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA
| | - Xiaoguang Meng
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA; Center for Environmental Systems, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA
| | - Weina Meng
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Terrace Point, Hoboken, NJ 07030, USA
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Abbas SH, Younis YM, Rashid KH, Khadom AA. Removal of methyl orange dye from simulated wastewater by electrocoagulation technique using Taguchi method: kinetics and optimization approaches. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02269-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Srivastava A, Dangi LK, Kumar S, Rani R. Microbial decolorization of Reactive Black 5 dye by Bacillus albus DD1 isolated from textile water effluent: kinetic, thermodynamics & decolorization mechanism. Heliyon 2022; 8:e08834. [PMID: 35198750 PMCID: PMC8844646 DOI: 10.1016/j.heliyon.2022.e08834] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 10/03/2021] [Accepted: 01/21/2022] [Indexed: 11/24/2022] Open
Abstract
Reactive Black 5 is one of the most widely used dye in textile and other industries. It is one of the significantly toxic azo dye which poses a serious threat to the environment when discharged into water bodies. A bacterial strain having potential to decolourise and degrade RB5 was isolated from textile effluent, and further identified and characterized. On the basis of morphological, biochemical, and 16s rRNA sequence analysis, the isolate was identified as Bacillus albus DD1. It showed 98% removal of RB5 from aqueous medium within 38 h under optimum parameters, pH 7, temperature 40 °C, in the presence of 1% yeast extract as a co-substrate, and 25% inoculum size at the initial dye concentration of 50 mg/l. Kinetic study revealed the decolorization reaction is a first order non- spontaneous reaction. The rate constant and reaction rate for RB5 decolourization in presence of the isolate was 0.0523 s-1 and 2.6 × 10-3 mol/m3 sec, respectively. Values for ΔH and ΔS of the decolourization reaction, determined by thermodynamic analysis, were estimated to be +20.80 kJ/mol and ΔS = -0.1 kJ/mol K, respectively. LC-MS analysis revealed that decolorization was due to degradation of RB5 by cleavage of azo-bond by the bacterium, with the formation of s 3,6,8-trihyroxynapthalene and phthalic acid as degradation products. Therefore, the bacterium Bacillus albus DD1 has potential for application in biological treatment of dye contaminated industrial waste water.
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Affiliation(s)
- Ankita Srivastava
- Department of Chemical Engineering, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, 211004, Uttar Pradesh, India
| | - Lalit Kumar Dangi
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, 211004, Uttar Pradesh, India
| | - Sushil Kumar
- Department of Chemical Engineering, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, 211004, Uttar Pradesh, India
| | - Radha Rani
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, 211004, Uttar Pradesh, India
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