Combining Electrocatalysts and Biobased Adsorbents for Sustainable Denitrification

<div>Efficient treatment of domestic and industrial wastewater is one of the major challenges of the 21st 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 Na2SO4 supporting electrolyte at –0.6 V vs. RHE within three hours. The valorized nitrate in form of ammonia could be recovered by means of cheap Kraft Lignin-SiO2 sorbents to achieve a total denitrification. The presented method is economically feasible, scalable and contributes to sustainable recycling within a circular economy.</div>

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

Molecules ◽

10.3390/molecules26165093 ◽

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

Water ◽

10.3390/w13111607 ◽

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.

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Validated Simultaneous Gradient Ultra-Performance Liquid Chromatographic Quantification of Some Proton Pump Inhibitor Drug Residues in Saudi Pharmaceutical Industrial Wastewater

Molecules ◽

10.3390/molecules26144358 ◽

2021 ◽

Vol 26 (14) ◽

pp. 4358

Author(s):

Sherif A. Abdel-Gawad ◽

Hany H. Arab ◽

Alhumaidi B. Alabbas

Keyword(s):

Proton Pump ◽

Industrial Wastewater ◽

Mobile Phase ◽

Solid Phase ◽

Potassium Dihydrogen Phosphate ◽

Ultra Performance Liquid Chromatography ◽

Dihydrogen Phosphate ◽

Separation Pattern ◽

Inhibitor Drug ◽

Wastewater Samples

Monitoring and quantification of active pharmaceutical ingredients (APIs) in the environment constitute important and challenging tasks, as they are directly associated with human health. Three commonly used proton pump inhibitors (PPIs), namely, omeprazole sodium (OMP), pantoprazole sodium (PNT), and lansoprazole sodium (LNZ) are well separated and quantified using ultra-performance liquid chromatography (UPLC) in pharmaceutical industrial wastewater. The separation of the studied drugs was performed on a stationary phase with a WatersTM column (100 × 2.1 mm, 1.7 µm). The mobile phase was composed of methanol:0.05 M potassium dihydrogen phosphate buffer (adjusted to pH 7.5 using NaOH) (50:50, v/v). The elution process was done in gradient mode by changing the relative proportions of the mobile phase components with time to get an optimum separation pattern. The flow rate of the developing system was adjusted to 0.8 mL/minute. Detection of the separated drugs was performed at 230 nm. The studied drugs were quantified in the concentration range of 10–200 ng/mL for all drugs. The cited method was fully validated according to the international conference on harmonization (ICH-Q2B) guidelines, then it was applied successfully for quantification of the studied PPIs in real wastewater samples after their solid phase extraction (SPE).

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Degradation of Carcinogenic Hydroquinone in Coal Gasification Wastewater by Using Anaerobic Shaker Test

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1049-1050.39 ◽

2014 ◽

Vol 1049-1050 ◽

pp. 39-43 ◽

Cited By ~ 3

Author(s):

Qin Hong Ji ◽

Salma Tabassum ◽

Chun Feng Chu ◽

Chun Jie Li ◽

Zhen Jia Zhang

Keyword(s):

Industrial Wastewater ◽

Coal Gasification ◽

Anaerobic Sludge ◽

Phenol Removal ◽

Operational Parameters ◽

Pollutant Degradation ◽

Refractory Compounds ◽

Coal Gasification Wastewater ◽

Hydrolysis Acidification ◽

Wastewater Samples

Coal gasification wastewater, as a typical industrial wastewater has poor biodegradability and high toxicity. In this paper, simple anaerobic shaker test was conducted to investigate the degradation of hydroquinone in coal gasification wastewater. Anaerobic sludge shaker test were run for 27, 50 and 73 days, the phenol concentration were adjusted to 300 mg/L and 500 mg/L with pH 7.5, respectively. The experimental results also showed that this system could effectively deal with COD and phenol removal and remain in a stable level when the operational parameters altered while the hydrolysis acidification at 45h is appropriate. Organics degradation and transformation of anaerobic coal gasification wastewater samples at 12h, 24h, 36h, 48h, and 60h were analyzed by GC/MS and it was found that hydrolysis acidification played an important role in degradation of methyl phenol, hydroquinone and refractory compounds. Therefore, the results illustrated that the simple anaerobic shaker process is an easy way for pollutant degradation and treat coal gasification wastewater effectively.

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A combination machine for industrial wastewater purification

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/698/5/055037 ◽

2019 ◽

Vol 698 ◽

pp. 055037

Author(s):

A V Moskvichova ◽

D O Ignatkina ◽

E V Moskvichova ◽

D N Lebedev

Keyword(s):

Industrial Wastewater ◽

Wastewater Purification

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Study on printing wastewater treatment by decomposition reaction H2O2 catalyzed of complex between ion Ni2+ and citric acid

Vietnam Journal of Catalysis and Adsorption ◽

10.51316/jca.2020.078 ◽

2020 ◽

Vol 9 (4) ◽

pp. 106-110

Author(s):

Tue Nguyen Ngoc ◽

Nghia Nguyen Trong ◽

Thuong Nghiem Thi ◽

Quang Tran Thuong ◽

Trung Nguyen Duc

Keyword(s):

Wastewater Treatment ◽

Citric Acid ◽

Industrial Wastewater ◽

Room Temperature ◽

Organic Pollutant ◽

Decomposition Reaction ◽

Efficient Treatment ◽

Catalytic Role ◽

Printing Processes

In this article, the results of the research on organic pollutant treatment in the wastewater of printing processes on fabric by H2O2 under the catalytic role of the complex between ion Ni2+ and Citric acid (H4L) were presented. The condition of pH, H4L/Ni2+, H2O2, Ni2+ concentration has been explored to get the optimal conditions for improving COD efficient treatment. The results provide the solutions of the homogeneous complex catalysts in the industrial wastewater treatment at room temperature and atmosphere.

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A sensitive spectrophotometric determination of tadalafil in pharmaceutical preparations and industrial wastewater samples

Baghdad Science Journal ◽

10.21123/bsj.10.3.1005-1013 ◽

2013 ◽

Vol 10 (3) ◽

pp. 1005-1013 ◽

Cited By ~ 2

Author(s):

Baghdad Science Journal

Keyword(s):

Standard Deviation ◽

Industrial Wastewater ◽

Pharmaceutical Preparations ◽

Pharmaceutical Formulations ◽

Molar Absorptivity ◽

Average Recovery ◽

Relative Standard ◽

Wastewater Samples ◽

Sensitive Spectrophotometric Method

A simple, accurate, precise, rapid, economical and a high sensitive spectrophotometric method has been developed for the determination of tadalafil in pharmaceutical preparations and industrial wastewater samples, which shows a maximum absorbance at 204 nm in 1:1 ethanol-water. Beer's law was obeyed in the range of 1-7?g/ mL ,with molar absorptivity and Sandell ? s sensitivity of 0.783x105l/mol.cm and 4.97 ng/cm2respectively, relative standard deviation of the method was less than 1.7%, and accuracy (average recovery %) was 100 ± 0. 13. The limits of detection and quantitation are 0.18 and 0.54 µg .ml-1, respectively. The method was successfully applied to the determination of tadalafil in some pharmaceutical formulations (tablets) and industrial wastewater samples. The proposed method was validated by sensitivity and precision which proves suitability for the routine analysis of tadalafil in true samples.

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