Synergistic effects of iron (Fe) and biochar on light-weight geopolymers when used in wastewater treatment applications

Fe(VI) (FeVIO42-) and Fe(V) (FeVO43-) have high oxidizing power, selectivity, and upon decomposition produce a non-toxic by-product, Fe(III), which makes them potential oxidants in water and wastewater treatment. Rates of oxidation increase with a decrease in pH and are related to protonation of FeVIO42- and FeVO43-. Oxidation of sulfur- nd nitrogen-containing pollutants by Fe(VI) can be accomplished in seconds to minutes with formation of non-hazardous products. Fe(VI) can easily oxidize the amino acid components of microcystins and is a suitable disinfectant for detoxifying toxins in water. The oxidation of pollutants and amino acids with Fe(V) is 3-5 orders of magnitude faster than with Fe(VI). The use of ionizing radiation and photocatalytic techniques in the presence of Fe(VI) results in Fe(V) formation and may have synergistic effects on the oxidation of pollutants and removal of toxins in water and wastewater. This paper summarizes the results of multi-functional properties of Fe(VI) and Fe(V) to treat water and wastewater.

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Microbial fuel cell hybrid systems for wastewater treatment and bioenergy production: Synergistic effects, mechanisms and challenges

Renewable and Sustainable Energy Reviews ◽

10.1016/j.rser.2018.12.027 ◽

2019 ◽

Vol 103 ◽

pp. 13-29 ◽

Cited By ~ 51

Author(s):

Ying Zhang ◽

Mengmeng Liu ◽

Minghua Zhou ◽

Huijia Yang ◽

Liang Liang ◽

...

Keyword(s):

Wastewater Treatment ◽

Fuel Cell ◽

Hybrid Systems ◽

Microbial Fuel Cell ◽

Cell Hybrid ◽

Synergistic Effects ◽

Bioenergy Production ◽

Fuel Cell Hybrid

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Investigating synergies in sequential biofiltration-based hybrid systems for the enhanced removal of trace organic chemicals from wastewater treatment plant effluents

Environmental Science Water Research & Technology ◽

10.1039/c9ew00181f ◽

2019 ◽

Vol 5 (8) ◽

pp. 1423-1435 ◽

Cited By ~ 3

Author(s):

Johann Müller ◽

Jörg E. Drewes ◽

Uwe Hübner

Keyword(s):

Wastewater Treatment ◽

Hybrid Systems ◽

Wastewater Treatment Plant ◽

Municipal Wastewater ◽

Synergistic Effects ◽

Treatment Plant ◽

Organic Chemicals ◽

Municipal Wastewater Treatment ◽

Trace Organic Chemicals ◽

Trace Organic

Synergistic effects in advanced wastewater treatment hybrid systems are beneficial for the removal of trace organic chemicals from municipal wastewater treatment plant effluents.

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Synergistic effects of oxidation, coagulation and adsorption in the integrated fenton-based process for wastewater treatment: A review

Journal of Environmental Management ◽

10.1016/j.jenvman.2022.114460 ◽

2022 ◽

Vol 306 ◽

pp. 114460

Author(s):

Ruoyun Lin ◽

Yang Li ◽

Tianzhi Yong ◽

Wenxing Cao ◽

Junsheng Wu ◽

...

Keyword(s):

Wastewater Treatment ◽

Synergistic Effects

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Degradation of Aqueous CONFIDOR® Pesticide by Simultaneous TiO2 Photocatalysis and Fe-Zeolite Catalytic Ozonation

Water ◽

10.3390/w13233327 ◽

2021 ◽

Vol 13 (23) ◽

pp. 3327

Author(s):

Muhammad Raashid ◽

Mohsin Kazmi ◽

Amir Ikhlaq ◽

Tanveer Iqbal ◽

Muhammad Sulaiman ◽

...

Keyword(s):

Wastewater Treatment ◽

Advanced Oxidation Processes ◽

Reaction Rate ◽

Synergistic Effects ◽

Complete Removal ◽

The Novel ◽

Initial Concentration ◽

Oxidation Processes ◽

Treatment Techniques ◽

Persistent Pollutants

Due to the importance of water for human survival and scarcity of freshwater resources, wastewater treatment has become very important recently. Some persistent pollutants, such as pesticides, are not removed even after multiple conventional wastewater treatment techniques. Advanced oxidation processes (AOPs) are one of the novel techniques that can be used to treat these persistent compounds. Photocatalytic ozonation is a promising AOP that combines photocatalysis and ozonation for synergistic effects and faster degradation of persistent pollutants. However, usually, only a photocatalyst is used while combining photocatalysis and ozonation. In this work, both a photocatalyst and ozonation catalyst have been simultaneously used for the degradation of commercially available CONFIDOR® pesticide, a Bayer product with Imidacloprid as the active ingredient. TiO2 is employed as a photocatalyst, and Fe-coated Zeolite is employed as an ozonation catalyst. The results show that the reaction rate increases by 1.4 times if both catalysts are used as compared to the use of one photocatalyst only. Almost complete removal (>99%) of pollutant is achieved after 20 min with the simultaneous use of a catalyst when imidacloprid with an initial concentration of 100 mg/L is subjected to 250 W/m2 UV of a wavelength of 253.7 nm and 100 mg/h ozone, where it takes 30 min if only one photocatalyst is used. The paper also explores the effect of initial concentration, UV intensity, catalyst dose and catalyst reuse while also briefly discussing the kinetics and mechanism.

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The effect of public or private structures in wastewater treatment on the conditions for the design, construction and operation of wastewater treatment plants

Water Science & Technology ◽

10.2166/wst.2004.0470 ◽

2004 ◽

Vol 50 (7) ◽

pp. 273-280 ◽

Cited By ~ 2

Author(s):

T. Grünebaum ◽

H. Bode

Keyword(s):

Wastewater Treatment ◽

High Performance ◽

Wastewater Treatment Plants ◽

Synergistic Effects ◽

Core Competencies ◽

The Public ◽

Organisational Form ◽

Clear Cut ◽

Framework Conditions ◽

Definition Of

Organised in public or private structures, wastewater services have to cope with different framework conditions as regards planning, construction, financing and operation. This leads quite often to different modes of management. In recent years there has been a push for privatisation on the water sector in general, the reasons for which are manifold, ranging from access to external know-how and capital to synergistic effects through integration of wastewater treatment into other tasks of similar or equal nature. Discussed are various models of public/private partnership (PPP) in wastewater treatment, encompassing for example the delegation of partial tasks or even the proportional or entire transfer of ownership of treatment facilities to private third parties. Decisive for high performance and efficiency is not the legal or organisational form, but rather the clear and unmistakable definition of tasks which are to be assigned to the different parties, customers and all other partners involved, as well as of clear-cut interfaces. On account of the (of course legitimate) profit-oriented perspective of the private sector, some decisionmaking processes in relation to project implementation (design and construction) and to operational aspects will differ from those typically found on the public sector. This does apply to decisions on investments, financing and on technical solutions too. On the other hand, core competencies in wastewater treatment should not be outsourced, but remain the public bodies’ responsibility, even with ‘far-reaching’ privatisation models. Such core competencies are all efforts geared to sustainable wastewater treatment as lifesupporting provision for the future or as contribution to the protection of health and the environment and to the development of infrastructure. Major areas of wastewater treatment and other related tasks are reviewed. The paper concludes with a list of questions on the issue of outsourcing.

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