Application of adsorption process for effective removal of emerging contaminants from water and wastewater

2021 ◽  
Vol 280 ◽  
pp. 116995
Author(s):  
B. Senthil Rathi ◽  
P. Senthil Kumar
Keyword(s):  
Emerging Contaminants ◽  
Adsorption Process ◽  
Effective Removal ◽  
Water And Wastewater

scholarly journals Could EB irradiation be the simplest solution for removing emerging contaminants from water and wastewater?

2018 ◽  
Vol 13 (1) ◽  
pp. 172-183 ◽  
Author(s):  
A. G. Capodaglio
Keyword(s):  
Human Health ◽  
Emerging Contaminants ◽  
Aquatic Environments ◽  
Radiation Processing ◽  
Free Process ◽  
Regulatory Status ◽  
Effective Removal ◽  
Water And Wastewater ◽  
Removal Technologies ◽  
Specific Technology

Abstract Newly observed presence of ‘emerging contaminants’, defined also Compounds of Emerging Concern, chemicals without regulatory status and which impact on environment and human health are poorly understood has been amply reported in wastewater and aquatic environments. ‘Conventional’ water pollutants have been described for decades and their impact on human health and the environment are known; effective technologies for their removal are well established. This is not the case for most emerging contaminants: no effective removal technologies have been discovered to date, to simultaneously remove all of the concerned contaminants, even though some techniques have been demonstrated to remove some contaminants to a certain extent. Radiation processing using electron beam (EB) accelerators and gamma irradiators has shown promising results in many water-related applications. Radiation/EB processing is an additive-free process using short lived reactive species formed during radiolysis of water for decomposition of pollutants. Isolated studies have demonstrated the effectiveness of radiation, alone or in combination with other treatments, in the decomposition of refractory organic compounds in aqueous solutions and in the removal or inactivation, of microorganisms and parasites. This review paper on this specific technology summarizes results of reported applications.

Removal of Emerging Contaminants from Water and Wastewater Using Nanofiltration Technology

2016 ◽  
pp. 72-91
Author(s):  
Yang Hu ◽  
Yue Peng ◽  
Wen Liu ◽  
Dongye Zhao ◽  
Jie Fu
Keyword(s):  
Membrane Filtration ◽  
Water Distribution ◽  
Emerging Contaminants ◽  
Low Cost ◽  
Distribution Networks ◽  
Comprehensive Overview ◽  
Environmental Cleaning ◽  
Promising Tool ◽  
Drinking Water Distribution ◽  
Water And Wastewater

Conventional water/wastewater treatment methods are incapable of removing the majority of Emerging Contaminants (ECs) and a large amount of them and their metabolites are ultimately released to the aquatic environment or drinking water distribution networks. Recently, nanofiltration, a high pressure membrane filtration process, has shown to be superior to other conventional filtration methods, in terms of effluent quality, easy operation and maintenance procedures, low cost, and small required operational space. This chapter provides a comprehensive overview of the most relevant works available in literature reporting the use of nanofiltration for the removal of emerging contaminants from water and wastewater. The fundamental knowledge of nanofiltration such as separation mechanisms, characterization of nanofiltration membranes, and predictive modeling has also been introduced. The literature review has shown that nanofiltration is a promising tool to treat ECs in environmental cleaning and water purification processes.

scholarly journals Effective removal of Cu2+ ions from polluted water using new bio-adsorbents

2021 ◽  
Vol 16 (2) ◽  
pp. 566-581
Author(s):  
B. Jagadeeswara Reddy ◽  
Sneha Latha Pala ◽  
Wondwosen Kebede Biftu ◽  
M. Suneetha ◽  
Kunta Ravindhranath
Keyword(s):  
Functional Groups ◽  
Adsorption Process ◽  
Polluted Water ◽  
Order Model ◽  
Langmuir Adsorption ◽  
Effective Removal ◽  
High Sorption ◽  
Pseudo Second Order ◽  
Surface Complex Formation ◽  
Polluted Lake

Abstract Sorbents derived from stem powders of Feronia limonia (FLSP), Amorphophallus paeoniifolius (APSP) and Pumpkin (Cucurbitapepo) (PSP) plants are investigated for the removal of Cu2+ ions from polluted water by adopting batch methods of extraction. Extraction conditions are optimized for the effective removal of Cu2+ ions. High sorption capacities are observed: 175.5 mg/g for FLSP; 140.4 mg/g for APSP; 130.0 mg/g for PSP. Effective pH ranges are: 5 to 10 for FLSP; 6 to 10 for APSP and 7 to 10 for PSP. The three spent adsorbents can be regenerated and used. Thermodynamic parameters indicate that the adsorption process is spontaneous, endothermic and have positive change in entropy values. As ΔH values are more than 25.0 kJ/mole, the adsorption may be due to surface complex formation between Cu2+ ions and functional groups of the adsorbents viz., -OH, -COOH etc. in the effective pH ranges. The good adsorption behaviour of FLSP even in acidic pHs may be due to the ion-exchange of Cu2+ ions for H+ ions of the functional groups of the adsorbent. The Langmuir adsorption isotherm and pseudo second-order model describe well the adsorption process. The sorbents are effectively applied to treat effluents from Cu-based industries and polluted lake water.

scholarly journals Photocatalytic abatement of emerging pollutants in pure water and wastewater effluent by TiO2 and Ce-ZnO: degradation kinetics and assessment of transformation products

2019 ◽  
Vol 18 (4) ◽  
pp. 845-852 ◽  
Author(s):  
Debora Fabbri ◽  
María José López-Muñoz ◽  
Alessandro Daniele ◽  
Claudio Medana ◽  
Paola Calza
Keyword(s):  
Removal Efficiency ◽  
Emerging Contaminants ◽  
Degradation Kinetics ◽  
Pure Water ◽  
Transformation Products ◽  
Emerging Pollutants ◽  
Wastewater Effluent ◽  
Transient Transformation ◽  
Water And Wastewater

A good removal efficiency was obtained for a mixture of seven emerging contaminants in wastewater effluent using two catalysts, Ce-ZnO and TiO2-SG, as evidenced by the formation of several transient transformation products.

scholarly journals Fate of COVID-19 Occurrences in Wastewater Systems: Emerging Detection and Treatment Technologies—A Review

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2680 ◽  
Author(s):  
Emmanuel Kweinor Tetteh ◽  
Mark Opoku Amankwa ◽  
Edward Kwaku Armah ◽  
Sudesh Rathilal
Keyword(s):  
Emerging Contaminants ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Membrane Bioreactors ◽  
Magnetic Biosensor ◽  
Wastewater Systems ◽  
Treatment Technologies ◽  
Water And Wastewater

The coronavirus (COVID-19) pandemic is currently posing a significant threat to the world’s public health and social-economic growth. Despite the rigorous international lockdown and quarantine efforts, the rate of COVID-19 infectious cases remains exceptionally high. Notwithstanding, the end route of COVID-19, together with emerging contaminants’ (antibiotics, pharmaceuticals, nanoplastics, pesticide, etc.) occurrence in wastewater treatment plants (WWTPs), poses a great challenge in wastewater settings. Therefore, this paper seeks to review an inter-disciplinary and technological approach as a roadmap for the water and wastewater settings to help fight COVID-19 and future waves of pandemics. This study explored wastewater–based epidemiology (WBE) potential for detecting SARS-CoV-2 and its metabolites in wastewater settings. Furthermore, the prospects of integrating innovative and robust technologies such as magnetic nanotechnology, advanced oxidation process, biosensors, and membrane bioreactors into the WWTPs to augment the risk of COVID-19’s environmental impacts and improve water quality are discussed. In terms of the diagnostics of COVID-19, potential biosensors such as sample–answer chip-, paper- and nanomaterials-based biosensors are highlighted. In conclusion, sewage treatment systems, together with magnetic biosensor diagnostics and WBE, could be a possible way to keep a surveillance on the outbreak of COVID-19 in communities around the globe, thereby identifying hotspots and curbing the diagnostic costs of testing. Photocatalysis prospects are high to inactivate coronavirus, and therefore a focus on safe nanotechnology and bioengineering should be encouraged.

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