Treatment of highly acidic wastewater containing high energetic compounds using dimensionally stable anode

Goyal, Akash; Srivastava, Vimal Chandra

doi:10.1016/j.cej.2017.05.061

Cited by 68 publications

(29 citation statements)

References 37 publications

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“…These kinds of wastewaters are highly polluting and toxic to most life forms; if untreated, they may devastate the streams and rivers into which they flow [104]. Acid wastewaters are usually derived from ammunition industries/labs, pharmaceutical industries, mining sites, steel industry, electroplating and phosphorous industries and, in many cases, their drainage is treated so as to be neutralized before being released into the environment [105,106]. The low pH wastewater causes numerous problems in the effluent treatment as well as in the water body in which it is discharged [105].…”

Section: Extremophilic Microalgae In Wwtmentioning

confidence: 99%

“…Acid wastewaters are usually derived from ammunition industries/labs, pharmaceutical industries, mining sites, steel industry, electroplating and phosphorous industries and, in many cases, their drainage is treated so as to be neutralized before being released into the environment [105,106]. The low pH wastewater causes numerous problems in the effluent treatment as well as in the water body in which it is discharged [105]. Furthermore, a highly acidic medium breaks down organic matter and eradicates microbial organisms able to treat the water naturally [105].…”

Section: Extremophilic Microalgae In Wwtmentioning

confidence: 99%

“…The low pH wastewater causes numerous problems in the effluent treatment as well as in the water body in which it is discharged [105]. Furthermore, a highly acidic medium breaks down organic matter and eradicates microbial organisms able to treat the water naturally [105].…”

Section: Extremophilic Microalgae In Wwtmentioning

confidence: 99%

See 2 more Smart Citations

Ammonium Utilization in Microalgae: A Sustainable Method for Wastewater Treatment

2021

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In plant cells, ammonium is considered the most convenient nitrogen source for cell metabolism. However, despite ammonium being the preferred N form for microalgae, at higher concentrations, it can be toxic, and can cause growth inhibition. Microalgae’s tolerance to ammonium depends on the species, with various taxa showing different thresholds of tolerability and symptoms of toxicity. In the environment, ammonium at high concentrations represents a dangerous pollutant. It can affect water quality, causing numerous environmental problems, including eutrophication of downstream waters. For this reason, it is important to treat wastewater and remove nutrients before discharging it into rivers, lakes, or seas. A valid and sustainable alternative to conventional treatments could be provided by microalgae, coupling the nutrient removal from wastewater with the production of valuable biomass. This review is focused on ammonium and its importance in algal nutrition, but also on its problematic presence in aquatic systems such as wastewaters. The aim of this work is to provide recent information on the exploitation of microalgae in ammonium removal and the role of ammonium in microalgae metabolism.

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Section: Extremophilic Microalgae In Wwtmentioning

confidence: 99%

Section: Extremophilic Microalgae In Wwtmentioning

confidence: 99%

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Ammonium Utilization in Microalgae: A Sustainable Method for Wastewater Treatment

2021

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“…In order to identify the dominant one between direct and indirect oxidation, scavenger study was conducted. For this purpose, terephthalic acid was used as scavenging species (Goyal & Srivastava, 2017; Yang, Zhang, & Xu, 2012). The experiments were performed at optimized parameters (I = 1.2 A; pH = 4.0; t = 30 min) without and with 12 mM of terephthalic acid.…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytic oxidation of aromatic amine (4‐aminobiphenyl): Kinetics and transformation products with mechanistic approach

Verma

Kushwaha

Singh

et al. 2022

Water Environment Research

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Electrocatalytic oxidation (EO) of carcinogenic 4-aminobiphenyl (4-ABP) aromatic amine was performed using Ti-RuO 2 anodes. Current (I), pH, electrolysis time (t), and 4-ABP initial concentration (C o ) were selected as EO parameters, and their effects on %4-ABP removal (R 1 ) and energy consumed (R 2 ) were studied. Experimental design, parameters optimization, and their interaction with responses R 1 and R 2 were performed using response surface methodology. At optimized parameters, %TOC removal and 4-BP mineralization current efficiency (%MCE) were assessed to evaluate the potential of Ti/RuO 2 anodes towards 4-ABP mineralization. Simultaneous TOC and 4-ABP degradation kinetics were also studied to evaluate the competition in 4-ABP mineralization and degradation. Further, UPLC-Q-TOF-MS analysis was performed to identify the 4-ABP transformation products during the EO, and a mechanism describing the EO transformation was proposed. At optimum parameters (I = 1.2 A; pH = 4.0; t = 30 min; C o = 30 ppm), responses were found to be R 1 = 60.25%; R 2 = 2.49 kWh/g of 4-ABP removed. %TOC removal and %MCE were 52.4% and 34.2%, respectively.

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“…There have been several studies in the literature reporting the use of the electrochemical oxidation technique in wastewater treatment. [13][14][15][16] There are two types of electrochemical oxidation. In the direct oxidation process, there is only electron transfer intervention without any materials, where the contaminants are directly destroyed by electron after the adsorption on anode surface.…”

Section: Introductionmentioning

confidence: 99%

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

Halim

Adnan

Lahuri

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Previous reported studies revealed that composite electrodes are effective and suitable for wastewater treatment applications owing to their high porosity and increased electrochemical active area. However, the critical challenges to the wider adoption of composite electrodes for environmental applications are the need to reduce the cost of electrode materials, and to improve both their long-term stability and electrocatalytic performance. This study aims to investigate the efficiency and stability of low-cost graphite/chitosan-polyvinyl chloride (C/Chi-PVC) composite electrodes for Reactive Red 4 (RR4) degradation. Toxicity of the treated RR4 wastewater also was investigated using a seed germination test.RESULTS: A cyclic voltammetry study conducted revealed that C 49 /Chi 21 -PVC 30 (49% C, 21% Chi, 30% PVC) showed better electrochemical behaviour for hypochlorous ion (OCl − ) formation, which is responsible for RR4 degradation via indirect electrochemical reaction. Owing to the synergistic effect of both materials, high colour, total organic carbon (TOC) and chemical oxygen demand (COD) removals of 99.61%, 89.68% and 76.35%, respectively, were achieved with less electrode damage at optimum electrolysis parameters. The treated RR4 solution displayed low toxicity after 14 days of exposure to the water sample. The electrode stability in the aggressive OCl − solution was studied by characterization of fresh and used electrodes using field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FESEM-EDX). This showed no significant difference in surface roughness and elemental composition; the reusability test confirmed that the electrode can be applied in repeated electrolysis.CONCLUSION: Overall, the fabricated electrode in this study showed high efficiency with robust and durable characteristics for wastewater treatment applications.

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Treatment of highly acidic wastewater containing high energetic compounds using dimensionally stable anode

Cited by 68 publications

References 37 publications

Ammonium Utilization in Microalgae: A Sustainable Method for Wastewater Treatment

Ammonium Utilization in Microalgae: A Sustainable Method for Wastewater Treatment

Electrocatalytic oxidation of aromatic amine (4‐aminobiphenyl): Kinetics and transformation products with mechanistic approach

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

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