scholarly journals Green-synthesized copper nano-adsorbent for the removal of pharmaceutical pollutants from real wastewater samples

Heliyon ◽  
2019 ◽  
Vol 5 (8) ◽  
pp. e02339 ◽  
Author(s):  
Dalal Z. Husein ◽  
Reda Hassanien ◽  
Mostafa F. Al-Hakkani
Keyword(s):  
Pharmaceutical Pollutants ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Nano Adsorbent

scholarly journals Nitrification Process in a Nuclear Wastewater with High Load of Nitrogen, Uranium and Organic Matter under ORP Controlled

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1607
Author(s):  
Mariano Venturini ◽  
Ariana Rossen ◽  
Patricia Silva Paulo
Keyword(s):  
Ammonia Oxidation ◽  
High Load ◽  
Nuclear Fuels ◽  
Monod Model ◽  
Nernst Equation ◽  
Nitrification Process ◽  
Real Wastewater ◽  
High Concentrations ◽  
Wastewater Samples ◽  
Very High

To produce nuclear fuels, it is necessary to convert uranium′s ore into UO2-ceramic grade, using several quantities of kerosene, methanol, nitric acid, ammonia, and, in low level, tributyl phosphate (TBP). Thus, the effluent generated by nuclear industries is one of the most toxic since it contains high concentrations of dangerous compounds. This paper explores biological parameters on real nuclear wastewater by the Monod model in an ORP controlled predicting the specific ammonia oxidation. Thermodynamic parameters were established using the Nernst equation to monitor Oxiders/Reductors relationship to obtain a correlation of these parameters to controlling and monitoring; that would allow technical operators to have better control of the nitrification process. The real nuclear effluent is formed by a mixture of two different lines of discharges, one composed of a high load of nitrogen, around 11,000 mg/L (N-NH4+-N-NO3−) and 600 mg/L Uranium, a second one, proceeds from uranium purification, containing TBP and COD that have to be removed. Bioprocesses were operated on real wastewater samples over 120 days under controlled ORP, as described by Nernst equations, which proved to be a robust tool to operate nitrification for larger periods with a very high load of nitrogen, uranium, and COD.

scholarly journals Combining Electrocatalysts and Biobased Adsorbents for Sustainable Denitrification

2020 ◽  
Author(s):  
Zili Ma ◽  
Matthias Klimpel ◽  
Serhiy Budnyk ◽  
Anna Rokicińska ◽  
Piotr Kustrowski ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Supporting Electrolyte ◽  
Wastewater Purification ◽  
Efficient Treatment ◽  
Integrated Method ◽  
Ammonia Recovery ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Adsorption Treatment ◽  
Crucial Part

<div><p>Efficient treatment of domestic and industrial wastewater is one of the major challenges of the 21<sup>st</sup> century. Among the inorganic pollutants, nitrogen species are significant contaminants and the management of the nitrogen cycle is one the most crucial part of wastewater purification. Herein, we report an integrated method that minimizes the amount of used chemicals, can be empowered by renewable energy, uses renewables materials for ammonia recovery and is scalable. Complete denitrification of wastewater was achieved by combining electrochemical and adsorption treatment for real wastewater samples from the Stockholm water pilot plant. 98% of nitrate was selectively converted to ammonia over abundant copper electrocatalysts in Na<sub>2</sub>SO<sub>4</sub> supporting electrolyte at –0.6 V <i>vs.</i> RHE within three hours. The valorized nitrate in form of ammonia could be recovered by means of cheap Kraft Lignin-SiO<sub>2</sub> sorbents to achieve a total denitrification. The presented method is economically feasible, scalable and contributes to sustainable recycling within a circular economy.</p></div>

Determination of direct violet 51 dye in water based on its decolorisation by electrochemical treatment

2014 ◽  
Vol 68 (11) ◽  
Author(s):  
Yavuz Sürme ◽  
Onur Demirci
Keyword(s):  
Electrochemical Treatment ◽  
Textile Dye ◽  
Graphite Electrodes ◽  
Conjugated Systems ◽  
Initial Ph ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Interfering Ions ◽  
A Current

AbstractThe decolorisation process of a synthetic textile dye, direct violet 51, was investigated in an aqueous solution using an electrochemical method in a batch electrochemical cell. Graphite electrodes were used as the anode and cathode for the decolorisation process. The parameters such as applied current, initial pH, solution conductivity, interfering ions, and effect of electrodes were optimised. It was found that the dye with an initial concentration of 20 mg L−1 could be removed after 50 min using a current of 100 mA with colour removal of up to 94 %. The UV-VIS spectra of the dye were analysed prior to and after treatment and these confirmed that the conjugated systems were decomposed at a current of 100 mA. The optimised method was successfully applied to real wastewater samples.

scholarly journals Microbial fuel cell biosensor for the determination of biochemical oxygen demand of wastewater samples containing readily and slowly biodegradable organics

2020 ◽  
Author(s):  
Gábor Márk Tardy ◽  
Bálint Lóránt ◽  
Miklós Gyalai-Korpos ◽  
Vince Bakos ◽  
David Simpson ◽  
...  
Keyword(s):  
Biochemical Oxygen Demand ◽  
Microbial Fuel Cells ◽  
Corn Starch ◽  
Oxygen Demand ◽  
Cell Voltage ◽  
Organic Content ◽  
Total Charge ◽  
Real Wastewater ◽  
Wastewater Samples

Abstract Objectives Single-chamber air cathode microbial fuel cells (MFCs) were applied as biosensors for biochemical oxygen demand (BOD) measurement of real wastewaters with considerable suspended and/or slowly biodegradable organic content. Results The measurement method consists of batch sample injection, continuous measurement of cell voltage and calculation of total charge (Q) gained during the biodegradation of organic content. Diverse samples were analyzed: acetate and peptone samples containing only soluble readily biodegradable substrates; corn starch and milk samples with suspended and colloidal organics; real domestic and brewery wastewaters. Linear regression fitted to the Q vs. BOD5 measurement points of the real wastewaters provided high (> 0.985) R2 values. Time requirement of the measurement varied from 1 to 4 days, depending on the composition of the sample. Conclusions Relative error of BOD measured in the MFCs comparing with BOD5 was less than 10%, thus the method might be a good basis for the development of on-site automatic BOD sensors for real wastewater samples.

Adsorptive removal of Cu(II) and Pb(II) onto mixed-waste activated carbon: kinetic, thermodynamic, and competitive studies and application to real wastewater samples

2016 ◽  
Vol 9 (4) ◽  
Author(s):  
Zeid Abdullah ALOthman ◽  
Mohamed Abdelaty Habila ◽  
Nora H. Al-Shalan ◽  
Sulaiman M. Alfadul ◽  
Rahmat Ali ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorptive Removal ◽  
Real Wastewater ◽  
Mixed Waste ◽  
Wastewater Samples

Fenton treatment efficacy for the purification of different kinds of wastewater

2009 ◽  
Vol 60 (7) ◽  
pp. 1795-1801 ◽  
Author(s):  
M. Trapido ◽  
N. Kulik ◽  
A. Goi ◽  
Y. Veressinina ◽  
R. Munter
Keyword(s):  
Wastewater Treatment ◽  
Treatment Method ◽  
Cod Removal ◽  
Fenton Reagent ◽  
Fenton Chemistry ◽  
Real Wastewater ◽  
Pre Treatment ◽  
Wastewater Samples ◽  
Different Sources ◽  
Treatment Step

The Fenton chemistry comprises both the classical Fenton reagent and its modification, so-called Fenton-like techniques, which have received great attention as a promising technology for wastewater treatment. In the present study real wastewater from different sources (leachate from oil shale semicoke landfill, pharmaceutical effluents from medical ointment production, municipal landfill leachate and wastewater originated from food-processing) were treated by means of Fenton/Fenton-like systems. The effectiveness of wastewater treatment was assessed by COD removal. Additionally, biodegradability improvement (BOD7/COD) and acute toxicity reduction of investigated wastewater samples were observed. The application of the Fenton chemistry to wastewater samples with different origin resulted generally in 70% or higher COD removal. Thus, the Fenton could be effectively applied both as a single treatment method and pre-treatment step to improve subsequent biodegradability of wastewater effluents.

scholarly journals Combining Electrocatalysts and Biobased Adsorbents for Sustainable Denitrification

2020 ◽  
Author(s):  
Zili Ma ◽  
Matthias Klimpel ◽  
Serhiy Budnyk ◽  
Anna Rokicińska ◽  
Piotr Kustrowski ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Supporting Electrolyte ◽  
Wastewater Purification ◽  
Efficient Treatment ◽  
Integrated Method ◽  
Ammonia Recovery ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Adsorption Treatment ◽  
Crucial Part

<div><p>Efficient treatment of domestic and industrial wastewater is one of the major challenges of the 21<sup>st</sup> century. Among the inorganic pollutants, nitrogen species are significant contaminants and the management of the nitrogen cycle is one the most crucial part of wastewater purification. Herein, we report an integrated method that minimizes the amount of used chemicals, can be empowered by renewable energy, uses renewables materials for ammonia recovery and is scalable. Complete denitrification of wastewater was achieved by combining electrochemical and adsorption treatment for real wastewater samples from the Stockholm water pilot plant. 98% of nitrate was selectively converted to ammonia over abundant copper electrocatalysts in Na<sub>2</sub>SO<sub>4</sub> supporting electrolyte at –0.6 V <i>vs.</i> RHE within three hours. The valorized nitrate in form of ammonia could be recovered by means of cheap Kraft Lignin-SiO<sub>2</sub> sorbents to achieve a total denitrification. The presented method is economically feasible, scalable and contributes to sustainable recycling within a circular economy.</p></div>

scholarly journals Water Decontamination with Magnetic Particles by Adsorption and Chemical Degradation. Influence of the Manufacturing Parameters

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2219
Author(s):  
Paulo A Augusto ◽  
Teresa Castelo-Grande ◽  
Diana Vargas ◽  
Lorenzo Hernández ◽  
Leticia Merchán ◽  
...  
Keyword(s):  
Large Scale ◽  
Magnetic Particles ◽  
Initial Study ◽  
Chemical Degradation ◽  
Precipitation Method ◽  
Environmental Application ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Co Precipitation ◽  
Manufacturing Parameters

Many different processes for manufacturing of magnetic particles are present in scientific literature. However, the large majority are not able to be applied to large-scale real operations. In this study, we present an experiment undertaken to determine advisable values and options for the main variables and factors for the application of the reverse co-precipitation method to produce magnetic particles for real environmental applications. In such, we have tried a conjugation of values/factors that has led to 12 main experiments and production of 12 different particles. After an initial study concerning their main characteristics, these 12 different particles were applied for the sorption removal of COD from real wastewater samples (efficiencies between 70% and 81%) and degradation of Methylene blue by Fenton reaction (degradation efficiencies up to 100%). The main conclusion from this work is that the best set of values depends on the target environmental application, and this set of values were determined for the two applications studied.

scholarly journals Fabrication of Membrane Sensitive Electrodes for the Validated Electrochemical Quantification of Anti-Osteoporotic Drug Residues in Pharmaceutical Industrial Wastewater

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5093
Author(s):  
Sherif A. Abdel-Gawad ◽  
Obaid Afzal ◽  
Hany H. Arab ◽  
Alhumaidi B. Alabbas ◽  
Abdulmalik M. Alqarni
Keyword(s):  
Industrial Wastewater ◽  
Environmental Pollutants ◽  
Membrane Electrodes ◽  
Alendronate Sodium ◽  
Electrochemical Response ◽  
Nernstian Slope ◽  
Real Wastewater ◽  
Wastewater Samples ◽  
Ph Range

Accurate and precise application of ion-selective electrodes (ISEs) in the quantification of environmental pollutants is a strenuous task. In this work, the electrochemical response of alendronate sodium trihydrate (ALN) was evaluated by the fabrication of two sensitive and delicate membrane electrodes, viz. polyvinyl chloride (PVC) and glassy carbon (GC) electrodes. A linear response was obtained at concentrations from 1 × 10−5 to 1 × 10−2 M for both electrodes. A Nernstian slope of 29 mV/decade over a pH range of 8–11 for the PVC and GC membrane electrodes was obtained. All assay settings were carefully adjusted to obtain the best electrochemical response. The proposed technique was effectively applied for the quantification of ALN in pure form and wastewater samples, acquired from manufacturing industries. The proposed electrodes were effectively used for the determination of ALN in real wastewater samples without any prior treatment. The current findings guarantee the applicability of the fabricated ISEs for the environmental monitoring of ALN.

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