Hydrogen production from the tannery wastewater treatment by using agriculture supports membrane/adsorbents electrochemical system

Tran, Thien Khanh; Leu, Hoang Jyh; Vu, Trong Quyet; Nguyen, Minh Tam; Pham, Tuyet Anh

doi:10.1016/j.ijhydene.2019.05.040

Cited by 16 publications

(4 citation statements)

References 44 publications

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“…Figure d,e provides plots of hydrogen production efficiency at 2 V, with the electrolyte of KOH 1 M + seawater and under the influence of operation time (100 min). The effect of operation time and electrolysis temperature on the performance of the electrochemical system has been long studied in many works and both of these factors would strictly affect the power efficiency and the hydrogen production rate during the electrolysis . Accordingly, as the electrolysis temperature increases from 30 to 50, and then to 70 °C, the production of hydrogen increases from 140 to 158, and then to 179 cm 3 with the generation rate also increasing from 1.452 to 1.565, and then to 1.773 cm 3 /min.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a Robust and Highly Active Nonmagnetic Impregnated Cobalt/Carbon-Based Electrocatalyst for Hydrogen Production from the Electrolysis of Seawater

Tran,

Trinh,

Trinh

et al. 2023

ACS Appl. Energy Mater.

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The electrolysis of seawater to produce green hydrogen is considered a very effective method to generate clean energy to fulfill the world's needs for years to come. However, with 3.5 wt % salts in the seawater, including bacteria and microorganisms, lots of unwanted precipitates would occur on the active site of the electrodes, limiting the efficiency of the water electrolysis. In this regard, the use of electrocatalysts to support the reduction of activation energy barriers of hydrogen evolution rates and oxygen evolution rates and so enhance the production of hydrogen would be a very critical solution. Here we report the direct electrolysis of real seawater using a nonmagnetic cobalt/carbon-based electrocatalyst that is robust and highly active and generates a notable amount of hydrogen. The electrocatalyst was prepared from a biomass source with the addition of cobalt content at different concentrations and the process was carefully operated via a catalytic pyrolysis process. The as-prepared product was then decorated on the support nickel foam (NF) substrate to create CoO/C@NF self-supporting electrodes. The electrochemical performance of the electrocatalyst indicates excellent properties, achieving the industrial standard current density of 100 and 500 mA/cm 2 at low input voltages of 1.955 and 2.282 V at 30 °C, 1.863 and 2.156 at 50 °C, and 1.754 and 1.887 V at 70 °C, respectively. The best record of hydrogen production reached was 0.200 L, with a generation rate of 1.773 cm 3 /min, with the required voltage being almost constant at 100 mA/cm 2 , and increasing to 9.5% of its value at 500 mA/cm 2 after 100 h of operation. The findings of this work provide a competitive electrocatalyst derived from a biomass source via a simple creation process, which is highly active and very durable, and thus contributes greatly to the development of the seawater electrolysis industry.

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Section: Resultsmentioning

confidence: 99%

Preparation of a Robust and Highly Active Nonmagnetic Impregnated Cobalt/Carbon-Based Electrocatalyst for Hydrogen Production from the Electrolysis of Seawater

Tran,

Trinh,

Trinh

et al. 2023

ACS Appl. Energy Mater.

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“…The electrochemical degradation of organic pollutants in the wastewater therefore has good potential to be combined with HER. 82 However, effective electrochemical methods and catalysts should be developed to abstract electrons from these pollutants with smaller overpotentials. In addition, the electro-oxidation of NH 3 −N in the wastewater is also a potential reaction to combine with HER, which will remove the NH 3 −N in the form of N 2 with smaller overpotentials than OER.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…Since large amounts of wastewater are discharged every day, which contains different types of organic pollutants to be degraded. The electrochemical degradation of organic pollutants in the wastewater therefore has good potential to be combined with HER . However, effective electrochemical methods and catalysts should be developed to abstract electrons from these pollutants with smaller overpotentials.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Minireview of Coupled Electrochemical Hydrogen Production and Organic-Oxidation for Low Energy Consumption

Chen,

Fu,

Peng

et al. 2023

Energy Fuels

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Hydrogen production from electrochemical water splitting has attracted great attention due to its supply to green energy. However, commercial alkaline water electrolysis is energy intensive due to inert and large overpotentials of anodic oxygen evolution reaction (OER). Electro-oxidation of organics is an attractive alternative to the OER. With electro-oxidation of special organic substrates on an active anode, decreased cell voltage of H 2 evolution can be achieved along with the production of valueadded products. In this review, we summarize the latest progress on coupled H 2 production with organic electro-oxidation systems. Different organic compounds containing oxygen (alcoholic hydroxyl, aldehydes, ketone), nitrogen, sulfides, and olefin/alkane groups have been selectively oxidized into high value-added products on the anodes, thereby promoting H 2 evolution on the cathodes. Some complicated coupling reactions, such as the formation of C−C and C−N, are also introduced in the coupling systems. In addition, the challenges and prospects for the future development of this research field are highlighted.

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“…The low biodegradability may be due to phenolic compounds, red and black dyes, and other recalcitrant compounds used in leather washing and tanning [33]. A dark brown color characterizes tannery wastewater due to the different dyes used in the process; a strong odor is due to volatile organic compounds, organic and inorganic carbon, nitrogen and phosphorus compounds, fats, and other highly polluting compounds such as total dissolved solids (TDS), chlorides, sulfates, and heavy metals like zinc (Zn) and chromium (Cr), among others [1,4,[34][35][36]. These characteristics were similar to those found in this study, although the concentration of chromium was lower compared to other studies.…”

Section: Physicochemical Characterization Of Tannery Wastewatermentioning

confidence: 99%

Using the Response Surface Methodology to Treat Tannery Wastewater with the Bicarbonate-Peroxide System

Urbina-Suarez,

Salcedo-Pabón,

López-Barrera

et al. 2023

ChemEngineering

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A bicarbonate-peroxide (BAP) system was evaluated to improve the quality of industrial tannery wastewater using an I-optimal experimental design with four variables (temperature, initial pH, bicarbonate, and H2O2 concentration). The response variables were COD removal, ammonia nitrogen removal, and nitrate concentration. The most critical variables were optimized using a The process was carried out in 500 mL reactors, the operational volume of 250 mL, and the agitation was at 550 rpm. A new I-optimal reaction surface design at two levels (bicarbonate concentration 0.01–0.3 mol/L and H2O2 0.05–0.35 mol/L) was used to obtain the optimal data of the experimental design. Optimal conditions were validated by one-way ANOVA statistical analysis using Prism software. Temperatures above 50 °C promote the efficiency of the BAP system, and slightly acidic initial pHs allow stabilization of the system upon inclusion of bicarbonate and peroxide in the concentration of bicarbonate, which is critical for the reaction with peroxide and formation of reactive oxygen species. With the validated optimal data, removal percentages above 78% were achieved for nitrites, ammonia nitrogen, chromium, TSS, BOD, conductivity, chromium, and chlorides; for COD and TOC, removal percentages were above 45%, these results being equal and even higher than other AOPs implemented for this type of water.

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Hydrogen production from the tannery wastewater treatment by using agriculture supports membrane/adsorbents electrochemical system

Cited by 16 publications

References 44 publications

Preparation of a Robust and Highly Active Nonmagnetic Impregnated Cobalt/Carbon-Based Electrocatalyst for Hydrogen Production from the Electrolysis of Seawater

Preparation of a Robust and Highly Active Nonmagnetic Impregnated Cobalt/Carbon-Based Electrocatalyst for Hydrogen Production from the Electrolysis of Seawater

Minireview of Coupled Electrochemical Hydrogen Production and Organic-Oxidation for Low Energy Consumption

Using the Response Surface Methodology to Treat Tannery Wastewater with the Bicarbonate-Peroxide System

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