Biological oxidation methods for the removal of organic and inorganic contaminants from wastewater: A comprehensive review

Mohammadi, Samaneh; Najafi, Hanieh; Zolgharnian, Sheida; Sharifian, Seyedmehdi; Asasian‐Kolur, Neda

doi:10.1016/j.scitotenv.2022.157026

Cited by 20 publications

(9 citation statements)

References 242 publications

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“…It is thus no surprise that the quality of the SSZ-13 zeolite (e.g., BET surface area) was not satisfactory without supplementing TMAdaOH into the waste liquid after H-SSZ-13-R1 synthesis (Table S2 and Figure S6). For quality control and production consistency, waste liquids after two hydrothermal cycles, which contain unreacted silica and aluminum hydroxide, and a small amount of residual N-containing organic compounds are recommended to be discarded without further cycling, and discharged after solid–liquid separation (e.g., by flocculation) and/or oxidation treatments. , …”

Section: Resultsmentioning

confidence: 99%

“…For quality control and production consistency, waste liquids after two hydrothermal cycles, which contain unreacted silica and aluminum hydroxide, and a small amount of residual Ncontaining organic compounds are recommended to be discarded without further cycling, and discharged after solid−liquid separation (e.g., by flocculation) and/or oxidation treatments. 44,45 3.2. Physicochemical Characterization.…”

Section: Parameter Optimizationmentioning

confidence: 99%

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Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents

Xiong

Liu

Guo

et al. 2022

Environ. Sci. Technol.

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The application of small-pore chabazite-type SSZ-13 zeolites, key materials for the reduction of nitrogen oxides (NO x ) in automotive exhausts and the selective conversion of methane, is limited by the use of expensive N,N,N-trimethyl-1ammonium adamantine hydroxide (TMAdaOH) as an organic structure-directing agent (OSDA) during hydrothermal synthesis. Here, we report an economical and sustainable route for SSZ-13 synthesis by recycling and reusing the OSDA-containing waste liquids. The TMAdaOH concentration in waste liquids, determined by a bromocresol green colorimetric method, was found to be a key factor for SSZ-13 crystallization. The SSZ-13 zeolite synthesized under optimized conditions demonstrates similar physicochemical properties (surface area, porosity, crystallinity, Si/Al ratio, etc.) as that of the conventional synthetic approach. We then used the waste liquid-derived SSZ-13 as the parent zeolite to synthesize Cu ion-exchanged SSZ-13 (i.e., Cu-SSZ-13) for ammonia-mediated selective catalytic reduction of NO x (NH 3 -SCR) and observed a higher activity as well as better hydrothermal stability than Cu-SSZ-13 by conventional synthesis. In situ infrared and ultraviolet−visible spectroscopy investigations revealed that the superior NH 3 -SCR performance of waste liquid-derived Cu-SSZ-13 results from a higher density of Cu 2+ sites coordinated to paired Al centers on the zeolite framework. The technoeconomic analysis highlights that recycling OSDA-containing waste liquids could reduce the raw material cost of SSZ-13 synthesis by 49.4% (mainly because of the higher utilization efficiency of TMAdaOH) and, meanwhile, the discharging of wastewater by 45.7%.

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Section: Resultsmentioning

confidence: 99%

Section: Parameter Optimizationmentioning

confidence: 99%

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents

Xiong

Liu

Guo

et al. 2022

Environ. Sci. Technol.

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“…These processes are essential for establishing favorable conditions for bacteria to thrive and actively participate in the self-healing process of concrete. Extensive research has demonstrated the pivotal role of bacteria in creating an alkaline environment and promoting the healing capabilities of concrete structures (66,(79)(80)(81)(82)(83)(84)(85)(86)(87)(88)(89).…”

Section: Various Types Of Bacteria Used In Concretementioning

confidence: 99%

Harnessing microbes for self-healing concrete – A review

Asgharpour,

Çakiral,

Marar

2024

Res. Eng. Struct. Mat.

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This review explores the burgeoning field of microbially enhanced construction materials, with a special focus on self-healing concrete, through the lens of microbial biotechnology. Central to this discourse is the innovative use of bacteria, particularly Bacillus species, to address the pervasive issue of microcracks in concrete, a fundamental material in the construction industry. Traditional remedies, such as chemical admixtures and fiber reinforcements, offer partial solutions; however, self-healing concrete represents a paradigm shift, harnessing the natural calcite-precipitating ability of bacteria to autonomously repair cracks, thereby augmenting structural durability and longevity. Delving into the mechanics, the bacteria, embedded within the concrete matrix, remain dormant until crack formation triggers their metabolic pathways, leading to calcite production that effectively seals the fissures. This bio-mediated repair mechanism not only enhances the structural integrity of concrete but also aligns with sustainable construction practices by minimizing maintenance requirements and material wastage. The review extends beyond self-healing phenomena, encompassing broader applications of microbial technology in construction, including bio-concrete, bio-cement, and soil stabilization methods. These applications underscore the versatility of microbes in enhancing material properties such as compressive strength, tensile resilience, and water impermeability. Empirical evidence underscores the necessity of optimizing bacterial dosages and curing conditions to maximize the self-healing efficiency. Future research trajectories should aim to elucidate the complex interactions between microbial agents and concrete matrices, assess long-term performance, and evaluate the environmental and economic sustainability of microbial interventions in construction. The integration of microbial technology in construction materials heralds a new epoch of innovation, offering robust, sustainable, and resilient solutions to enduring challenges in the industry.

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“…Studies on wastewater treatment have focussed on developing sustainable and suitable technologies for removing organic pollutants since many detected organic compounds interact with biological systems, raising concerns about potential human exposure and ecological health. 1,2 Today, there are various methods for the degradation of organic compounds, such as wet oxidation, 3 biological oxidation, 4 electrochemical redox, 5 advanced oxidation processes (AOPs) 6 or combined process. 7 AOPs, including photocatalysis, are considered high efficiency for degrading organic compounds in water.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach

Tran¹,

Nguyen

Phương³

et al. 2023

RSC Adv.

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Biological oxidation methods for the removal of organic and inorganic contaminants from wastewater: A comprehensive review

Cited by 20 publications

References 242 publications

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents

Harnessing microbes for self-healing concrete – A review

Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach

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Biological oxidation methods for the removal of organic and inorganic contaminants from wastewater: A comprehensive review

Cited by 20 publications

References 242 publications

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure-Directing Agents

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NOx Abatement by Recycling Organic Structure-Directing Agents

Harnessing microbes for self-healing concrete – A review

Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach

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Product

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Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents

Economical and Sustainable Synthesis of Small-Pore Chabazite Catalysts for NO_x Abatement by Recycling Organic Structure-Directing Agents