scholarly journals Twisted molecule-based hyper-crosslinked porous polymers for rapid and efficient removal of organic micropollutants from water

RSC Advances ◽  
2018 ◽  
Vol 8 (64) ◽  
pp. 36812-36818 ◽  
Author(s):  
Ziyan Jia ◽  
Jiannan Pan ◽  
Chen Tian ◽  
Daqiang Yuan
Keyword(s):  
Porous Polymers ◽  
Organic Micropollutants ◽  
Efficient Removal ◽  
Micropollutant Removal

Four hyper-crosslinked porous polymers were synthesized by a facile method, and exhibited excellent adsorption performances for organic micropollutant removal from water.

One-pot fabrication of lignin-based aromatic porous polymers for efficient removal of bisphenol AF from water

2021 ◽  
Vol 175 ◽  
pp. 396-405
Author(s):  
Luyan Sun ◽  
Kungang Chai ◽  
Liqin Zhou ◽  
Dankui Liao ◽  
Hongbing Ji
Keyword(s):  
Porous Polymers ◽  
Efficient Removal ◽  
One Pot ◽  
Bisphenol Af

scholarly journals MATHEMATICAL MODELLING OF THE REMOVAL OF ORGANIC MICROPOLLUTANTS IN THE ACTIVATED SLUDGE PROCESS: A LINEAR BIODEGRADATION MODEL

2018 ◽  
Vol 60 (2) ◽  
pp. 191-229
Author(s):  
MARK I. NELSON ◽  
RUBAYYI T. ALQAHTANI ◽  
FAISAL I. HAI
Keyword(s):  
Residence Time ◽  
Wastewater Treatment Plants ◽  
Activated Sludge Process ◽  
Simple Condition ◽  
Removal Mechanism ◽  
Organic Micropollutants ◽  
Adsorption Model ◽  
Micropollutant Removal ◽  
Effluent Stream ◽  
Steady State Solutions

Before wastewaters can be released into the environment, they must be treated to reduce the concentration of organic pollutants in the effluent stream. There is a growing concern as to whether wastewater treatment plants are able to effectively reduce the concentration of micropollutants that are also contained in their influent streams. We investigate the removal of micropollutants in treatment plants by analysing a model that includes biodegradation and sorption as the main mechanisms of micropollutant removal. For the latter a linear adsorption model is used in which adsorption only occurs onto particulates.The steady-state solutions of the model are found and their stability is determined as a function of the residence time. In the limit of infinite residence time, we show that the removal of biodegradable micropollutants is independent of the processes of adsorption and desorption. The limiting concentration can be decreased by increasing the concentration of growth-related macropollutants. Although, in principle, it is possible that the concentration of micropollutants is minimized at a finite value of the residence time, this was found not to be the case for the particular biodegradable micropollutants considered.For nonbiodegradable pollutants, we show that their removal is always optimized at a finite value of the residence time. For finite values of the residence time, we obtain a simple condition which identifies whether biodegradation is more or less efficient than adsorption as a removal mechanism. Surprisingly, we find that, for the micropollutants considered, adsorption is always more important than biodegradation, even when the micropollutant is classified as being highly biodegradable with low adsorption.

Magnetic Porous Polymers Prepared via High Internal Phase Emulsions for Efficient Removal of Pb2+ and Cd2+

2018 ◽  
Vol 6 (4) ◽  
pp. 5206-5213 ◽  
Author(s):  
Hongshan Zhu ◽  
Xiaoli Tan ◽  
Liqiang Tan ◽  
Huifang Zhang ◽  
Haining Liu ◽  
...  
Keyword(s):  
Porous Polymers ◽  
Efficient Removal ◽  
Internal Phase

Rapid and efficient removal of organic micropollutants from environmental water using a magnetic nanoparticles-attached fluorographene-based sorbent

2018 ◽  
Vol 343 ◽  
pp. 61-68 ◽  
Author(s):  
Wenjing Wang ◽  
Zhenlan Xu ◽  
Xiaoxia Zhang ◽  
Andreas Wimmer ◽  
En Shi ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Environmental Water ◽  
Organic Micropollutants ◽  
Efficient Removal

scholarly journals Rapid and Efficient Removal of Perfluorooctanoic Acid from Water with Fluorine-Rich Calixarene-Based Porous Polymers

2020 ◽  
Vol 12 (38) ◽  
pp. 43160-43166
Author(s):  
Dinesh Shetty ◽  
Ilma Jahović ◽  
Tina Skorjanc ◽  
Turan Selman Erkal ◽  
Liaqat Ali ◽  
...  
Keyword(s):  
Perfluorooctanoic Acid ◽  
Porous Polymers ◽  
Efficient Removal

Characteristics and evaluation of natural attenuation processes for organic micropollutant removal during riverbank filtration

2007 ◽  
Vol 7 (3) ◽  
pp. 1-7 ◽  
Author(s):  
C.K. Schmidt ◽  
F.T. Lange ◽  
H.-J. Brauch
Keyword(s):  
Urban Areas ◽  
Wide Spectrum ◽  
Riverbank Filtration ◽  
Organic Micropollutants ◽  
Micropollutant Removal ◽  
Trace Compounds ◽  
High Level ◽  
Underground Passage ◽  
Organic Trace Compounds

In industrialized and urban areas, surface waters are to a high level exposed to anthropogenic environmental impacts and are therefore often contaminated with a wide spectrum of organic trace compounds. Riverbank filtration is a well established technique in Europe and is most often used as an important component of the multiple-barrier system. During its underground passage, surface water undergoes a diversity of physical, biological and chemical processes, improving water quality significantly and adjusting it in ideal cases to the quality of natural groundwater. By means of examples taken from recent research projects and related to organic micropollutants currently under discussion, this contribution will report on characteristics of riverbank filtration with regard to its purification capacity for different classes of organic micropollutants.

scholarly journals Advanced Wastewater Treatment to Eliminate Organic Micropollutants in Wastewater Treatment Plants in Combination with Energy-Efficient Electrolysis at WWTP Mainz

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3599 ◽  
Author(s):  
Oliver Gretzschel ◽  
Michael Schäfer ◽  
Heidrun Steinmetz ◽  
Erich Pick ◽  
Kim Kanitz ◽  
...  
Keyword(s):  
Water Management ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Automatic Frequency ◽  
Municipal Wastewater Treatment ◽  
Organic Micropollutants ◽  
Micropollutant Removal

To achieve the Paris climate protection goals there is an urgent need for action in the energy sector. Innovative concepts in the fields of short-term flexibility, long-term energy storage and energy conversion are required to defossilize all sectors by 2040. Water management is already involved in this field with biogas production and power generation and partly with using flexibility options. However, further steps are possible. Additionally, from a water management perspective, the elimination of organic micropollutants (OMP) is increasingly important. In this feasibility study a concept is presented, reacting to energy surplus and deficits from the energy grid and thus providing the needed long-term storage in combination with the elimination of OMP in municipal wastewater treatment plants (WWTPs). The concept is based on the operation of an electrolyzer, driven by local power production on the plant (photovoltaic (PV), combined heat and power plant (CHP)-units) as well as renewable energy from the grid (to offer system service: automatic frequency restoration reserve (aFRR)), to produce hydrogen and oxygen. Hydrogen is fed into the local gas grid and oxygen used for micropollutant removal via upgrading it to ozone. The feasibility of such a concept was examined for the WWTP in Mainz (Germany). It has been shown that despite partially unfavorable boundary conditions concerning renewable surplus energy in the grid, implementing electrolysis operated with regenerative energy in combination with micropollutant removal using ozonation and activated carbon filter is a reasonable and sustainable option for both, the climate and water protection.

Retention of pharmaceutical residues and microorganisms at the Altendorf retention soil filter

2014 ◽  
Vol 70 (9) ◽  
pp. 1503-1509 ◽  
Author(s):  
E. Christoffels ◽  
F. M. Mertens ◽  
T. Kistemann ◽  
C. Schreiber
Keyword(s):  
Escherichia Coli ◽  
Heavy Metals ◽  
Giardia Lamblia ◽  
Microbial Contamination ◽  
Advanced Treatment ◽  
Organic Micropollutants ◽  
Combined Sewer Overflows ◽  
Efficient Removal ◽  
Pharmaceutical Residues ◽  
Combined Sewer

A study has been conducted on a retention soil filter (RSF) to test its effectiveness in removing pharmaceutical residues and microorganisms from combined sewer overflows (CSOs). Efficient removal of solids, nutrients and heavy metals has already been proven. The possibility that organic micropollutants and microorganisms are also retained by the use of RSFs has been identified, but data are lacking. Results obtained in this study, in which testing for removal by a RSF of numerous micropollutant substances was performed, are most promising. The pharmaceuticals diclofenac and ibuprofen are presented in detail as examples of such micropollutants. Both showed a reduction in positive samples of more than 55% as well as a significant reduction in median and maximum concentrations. For microorganisms such as Escherichia coli, coliphages and Giardia lamblia (cysts), an average reduction in concentrations by three logarithmic steps (99.9%) was achieved. These results add to the evidence that using a RSF in the advanced treatment of wastewater from CSOs reduces the exposure of watercourses to pharmaceutical residues and microbial contamination.

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