scholarly journals Adsorption of Estradiol by Natural Clays and Daphnia magna as Biological Filter in an Aqueous Mixture with Emerging Contaminants

Eng ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 312-324
Author(s):  
Andrés Pérez-González ◽  
Verónica Pinos-Vélez ◽  
Isabel Cipriani-Avila ◽  
Mariana Capparelli ◽  
Eliza Jara-Negrete ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Emerging Contaminants ◽  
Biological Filtration ◽  
Water Matrix ◽  
Biological Filter ◽  
Treatment Technologies ◽  
Aqueous Mixture ◽  
Natural Clays ◽  
Estradiol Concentration ◽  
Significant Factors

Among emerging pollutants, endocrine disruptors such as estradiol are of most concern. Conventional water treatment technologies are not capable of removing this compound from water. This study aims to assess a method that combines physicochemical and biological strategies to eliminate estradiol even when there are other compounds present in the water matrix. Na-montmorillonite, Ca-montmorillonite and zeolite were used to remove estradiol in a medium with sulfamethoxazole, triclosan, and nicotine using a Plackett–Burman experimental design; each treatment was followed by biological filtration with Daphnia magna. Results showed between 40 to 92% estradiol adsorption in clays; no other compounds present in the mixture were adsorbed. The most significant factors for estradiol adsorption were the presence of nicotine and triclosan which favored the adsorption, the use of Ca-montmorillonite, Zeolite, and time did not favor the adsorption of estradiol. After the physicochemical treatment, Daphnia magna was able to remove between 0–93% of the remaining estradiol. The combination of adsorption and biological filtration in optimal conditions allowed the removal of 98% of the initial estradiol concentration.

Current advances in treatment technologies for removal of emerging contaminants from water – A critical review

2021 ◽  
Vol 442 ◽  
pp. 213993
Author(s):  
Muhammad Kashif Shahid ◽  
Ayesha Kashif ◽  
Ahmed Fuwad ◽  
Younggyun Choi
Keyword(s):  
Critical Review ◽  
Emerging Contaminants ◽  
Treatment Technologies

Prediction of acute toxicity of emerging contaminants on the water flea Daphnia magna by Ant Colony Optimization–Support Vector Machine QSTR models

2017 ◽  
Vol 19 (3) ◽  
pp. 438-448 ◽  
Author(s):  
Reza Aalizadeh ◽  
Peter C. von der Ohe ◽  
Nikolaos S. Thomaidis
Keyword(s):  
Support Vector Machine ◽  
Acute Toxicity ◽  
Ant Colony Optimization ◽  
Daphnia Magna ◽  
Emerging Contaminants ◽  
Ant Colony ◽  
Support Vector ◽  
Water Flea

Prediction of acute toxicity towardsDaphnia magnausing Ant Colony Optimization–Support Vector Machine QSTR models.

scholarly journals Removal of Enteric Pathogens from Real Wastewater Using Single and Catalytic Ozonation

Water ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 127 ◽  
Author(s):  
João Gomes ◽  
Danilo Frasson ◽  
Rosa Quinta-Ferreira ◽  
Ana Matos ◽  
Rui Martins
Keyword(s):  
Volcanic Rock ◽  
Emerging Contaminants ◽  
Municipal Wastewater ◽  
Jc Virus ◽  
Low Cost ◽  
Catalytic Ozonation ◽  
Enteric Pathogens ◽  
Treated Wastewater ◽  
Genotype I ◽  
Treatment Technologies

Water scarcity is one of the main problems of this century. Water reclamation appears as an alternative due to the reuse of treated wastewater. Therefore, effluents treatment technologies (activated sludge, rotary biological discs, percolating beds) must be improved since they are not able to remove emerging contaminants such as enteric pathogens (bacteria and virus). These pollutants are difficult to remove from the wastewater and lead to adverse consequences to human health. Advanced oxidation processes, such as single and catalytic ozonation, appear as suitable complements to conventional processes. Catalytic ozonation was carried out using a low-cost material, a volcanic rock. Single and catalytic ozonation were capable of promoting total Escherichia coli removal from municipal wastewater after 90 min of contact. The presence of volcanic rock increases disinfection efficiency since E. coli regrowth was not observed. The identified viruses (Norovirus genotype I and II and JC virus) were completely removed using catalytic ozonation, whereas single ozonation was not able to eliminate JC virus even after 150 min of treatment. The higher performance of the catalytic process can be explained by the formation of hydroxyl radicals, proving that disinfection occurs in the liquid bulk and not due to adsorption at the volcanic rock.

scholarly journals A Review of Removal of Pollutants from Water/Wastewater Using Different Types of Nanomaterials

2014 ◽  
Vol 2014 ◽  
pp. 1-24 ◽  
Author(s):  
M. T. Amin ◽  
A. A. Alazba ◽  
U. Manzoor
Keyword(s):  
Emerging Contaminants ◽  
Cost Effective ◽  
Water Industry ◽  
Different Types ◽  
Droughts And Floods ◽  
Treatment Technologies ◽  
Purification Unit ◽  
Inorganic Solutes ◽  
Increasing Demand ◽  
Complex Organic

The rapidly increasing population, depleting water resources, and climate change resulting in prolonged droughts and floods have rendered drinking water a competitive resource in many parts of the world. The development of cost-effective and stable materials and methods for providing the fresh water in adequate amounts is the need of the water industry. Traditional water/wastewater treatment technologies remain ineffective for providing adequate safe water due to increasing demand of water coupled with stringent health guidelines and emerging contaminants. Nanotechnology-based multifunctional and highly efficient processes are providing affordable solutions to water/wastewater treatments that do not rely on large infrastructures or centralized systems. The aim of the present study is to review the possible applications of the nanoparticles/fibers for the removal of pollutants from water/wastewater. The paper will briefly overview the availability and practice of different nanomaterials (particles or fibers) for removal of viruses, inorganic solutes, heavy metals, metal ions, complex organic compounds, natural organic matter, nitrate, and other pollutants present in surface water, ground water, and/or industrial water. Finally, recommendations are made based on the current practices of nanotechnology applications in water industry for a stand-alone water purification unit for removing all types of contaminants from wastewater.

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.

scholarly journals Regulation of Natural and Synthetic Estrogens in Drinking Water Bodies: Reviewing Emerging Solutions for an Emerging Problem

2021 ◽  
Author(s):  
Fayga Nunes de Albuquerque Pismel ◽  
Rosane Cristina de Andrade ◽  
Daniele Maia Bila
Keyword(s):  
Emerging Contaminants ◽  
The United States ◽  
Scientific Data ◽  
Water Bodies ◽  
Legal Provisions ◽  
Regulatory Frameworks ◽  
Drinking Waters ◽  
Low Concentrations ◽  
Synthetic Estrogens ◽  
Treatment Technologies

Abstract A growing amount of data in the scientific literature indicates that emerging contaminants, such as Endocrine Disruptors Chemicals (EDCs), have increased in concentration in water bodies in recent years. The main objective of this research was to compile data on legal and regulatory frameworks of different locations regarding the control of estrogens (an EDC) in surface and drinking waters, to support regulation in countries where it has not shown significant advances. An analysis was carried out of the legal provisions aimed at guaranteeing the quality of surface and drinking waters, specifically regarding the control of estrogens, in the United States of America (USA), European Union (EU), Australia and Brazil. Among these, it is emphasized that only Australia has reference values for estrogens in water recycling for drinking purposes. Although several scientific data support the harmful effects of estrogens, several countries do not regulate the maximum values of these compounds allowed in water bodies. Some factors can influence the setting of standards for estrogens in regulations, such as the availability of affordable treatment technologies that are proven to be effective in removing these compounds and the lack of robust analytical methods with adequate limits of quantification for detection in low concentrations that can be widely employed.

Metal nanoparticles and its application on phenolic and heavy metal pollutants

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Vaanmathy Pandiyaraj ◽  
Ankita Murmu ◽  
Saravana Kumari Pandy ◽  
Murugan Sevanan ◽  
Shanamitha Arjunan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Nanoparticles ◽  
Emerging Contaminants ◽  
Environmental Issues ◽  
Metal Pollutants ◽  
Human Wellbeing ◽  
Potential Applications ◽  
Treatment Technologies ◽  
Heavy Metal Pollutants

Abstract The perpetual exposure of several manmade materials and their activities such as urbanization, industrialization, transportation, mining, construction, petroleum refining, manufacturing, preservatives, disinfectants etc., release various pollutants like organic, inorganic, and heavy metals which pollute the air, water, and soil. This poses various environmental issues which are relevant to the ecosystem and human wellbeing that intensify the implementation of new expedient treatment technologies. Likewise, phenolic and heavy metal pollutants find their way into the environment. These phenolic and heavy metals are toxic to the liver, heart and carcinogenic. Therefore, the removal of these kinds of pollutants from the environment is a highly challenging issue. As conventional treatment technologies have consequent drawbacks, new interests have been developed to remediate and remove pollutants from the ecosystem using metal nanoparticles (MPNs). To date, many researchers all over the world have been investigating novel approaches to enhance various remediation application technologies. One such approach that the researchers are constantly showing interest in is the use of nanomaterials with potential applications towards the environment. In this regard, MPNs like Copper (Cu), Nickel (Ni), Palladium (Pd), Gold (Au), Silver (Ag), Platinum (Pt), Titanium (Ti), and other nano metals are serving as a suitable agent to eliminate emerging contaminants in various fields, particularly in the removal of phenolic and heavy metal pollutants. This chapter discusses the mechanism and application of various MPNs in eliminating various phenolic and heavy metal pollutants from the environment.

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