Papers by NAVEEN CHATURVEDI
Applied Water Science
The growing contamination of various freshwater resources due to industrial effluent is a serious... more The growing contamination of various freshwater resources due to industrial effluent is a serious concern among the scientific community. Several organic compounds are essentially used as chemical intermediate in variety of industrial processes. These organic compounds are hazardous chemicals which are already considered dangerous to global public health and other forms of life due to their high toxicity, carcinogenicity. These organic contaminants are found present in the industrial effluents. Several treatment methods were applied in the literature for their elimination from wastewater to make their final disposal safe for environment. In this article, different kinds of physical, biological and advanced oxidation methods (AOPs) applied for the treatment of various important organic compounds were compared for their advantages and disadvantages. The results showed that the conventional treatment methods are not effective to treat these kinds of toxic and refractory chemical compou...
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Water Science and Technology, 2019
Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due... more Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due to rapid industrialization and population explosion, and also the effluents from industries and domestic wastewater are continuously polluting these resources. To address this issue, several decentralized wastewater treatment system (DWTS) have been installed all over the globe to reuse and recycle wastewater/graywater for non-potable uses such as fire protection, toilet-flushing, and landscape irrigation. In this review, a comparison between different DWTS was carried out to evaluate their performance, merits and limitations. Hybrid technologies like the electrically enhanced biomass concentrator reactor and integration of physical/ biological methods with bio-electrochemical systems such as microbial fuel cells were found to be the most promising methods for near complete removal of pollutants from wastewater and also the issue of membrane fouling was reduced to a good extent.
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Water Science and Technology, 2019
Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due... more Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due to rapid industrialization and population explosion, and also the effluents from industries and domestic wastewater are continuously polluting these resources. To address this issue, several decentralized wastewater treatment system (DWTS) have been installed all over the globe to reuse and recycle wastewater/graywater for non-potable uses such as fire protection, toilet-flushing, and landscape irrigation. In this review, a comparison between different DWTS was carried out to evaluate their performance, merits and limitations. Hybrid technologies like the electrically enhanced biomass concentrator reactor and integration of physical/ biological methods with bio-electrochemical systems such as microbial fuel cells were found to be the most promising methods for near complete removal of pollutants from wastewater and also the issue of membrane fouling was reduced to a good extent.
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Journal of Industrial and Engineering Chemistry, 2020
Abstract Methoxyanilines are aniline derivatives that are important chemical precursors for numer... more Abstract Methoxyanilines are aniline derivatives that are important chemical precursors for numerous Dye and Pharmaceuticals industries. Wastewater containing Methoxyanilines have high toxicity and carcinogenic properties and if discharged without prior treatment into fresh water resources, can result in possible detrimental effects to aquatic life and public health. Therefore, in this work Fenton-like oxidation was evaluated for the degradation of 2-Methoxyaniline (2-MA) and 4-Methoxyaniline (4-MA) separately using abundantly available Laterite soil as an alternative source of iron against commercially procured iron (CI) in Fenton-oxidation. Parameters like Hydrogen Peroxide (H2O2), Iron and initial Methoxyanilines concentration were investigated for each of the Methoxyanilines in separate experiments. For initial Methoxyanilines concentration of 0.5 mM, the maximum Methoxyanilines removal of 83.28 ± 0.26% and 86.34 ± 0.34% and COD removal of 71.91 ± 0.31% and 72.64 ± 0.29% for 2-MA and 4-MA at pH 3 and pH 2.5 was attained at laterite soil iron [LSI] of 0.05 mM respectively. From Kinetic studies of 2-MA and 4-MA, reaction time was estimated to be 360 minutes. Degradation with LSI was found to be slower and lesser than CI, but is comparable and can be applied as a replacement of CI for treatment of wastewater containing toxic and incalcitrant chemicals.
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Journal of Health and Pollution, 2020
Background. Aniline and its derivatives are widely used as intermediate chemicals in the pharmace... more Background. Aniline and its derivatives are widely used as intermediate chemicals in the pharmaceutical and dye industries and are present in their wastewaters. These chemicals are of concern due to their potential detrimental effects on public health and aquatic species in the environment. Objectives. Various available remedial technologies presented in the literature were investigated to determine the most suitable technology for the elimination of aniline and aniline derivatives from waste streams. Methods. The related literature was collected electronically from ScienceDirect, Google Scholar, the International Agency for Research on Cancer (IARC), ResearchGate and Wiley Online Library for systematic review. The search terms included ‘aniline’, ‘aniline degradation’, ‘advanced oxidation processes (AOPs)’, ‘aniline derivatives’ and ‘Fenton’s reagent'. Discussion. Aniline and its derivatives are a serious issue in the effluents of dye and pharmaceutical industries, but a number...
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Applied Water Science, 2019
p-Anisidine being a component of wastewater generated through dye and pharmaceutical industries i... more p-Anisidine being a component of wastewater generated through dye and pharmaceutical industries is highly toxic and carcinogenic in nature. Therefore, its presence in wastewater requires prior treatment before its disposal from the point of safety of human and aquatic life. Fenton’s oxidation is a type of advanced oxidation processes which is efficient, ecofriendly and reliable, and this was not studied for the removal of p-anisidine from wastewater. In this study, the effect of influent pH, hydrogen peroxide (H2O2) concentration and ferrous ion (Fe2+) concentration on the removal of p-anisidine by Fenton’s reagent was carried out on a laboratory scale. All samples were examined for initial and final concentrations of p-anisidine using UV–Vis spectrophotometry, and also initial and final COD was analyzed. p-Anisidine shows maximum absorbance at 296 nm. At pH 2.5 and [H2O2]/[Fe2+] of 70:1 for the initial p-anisidine concentration of 0.5 mM and for 24 h reaction time, the maximum remo...
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O-Anisidines (OAs) are extensively used as an intermediate for chemical reactions to produce vari... more O-Anisidines (OAs) are extensively used as an intermediate for chemical reactions to produce various triphenylmethane and azo dyes, and also in manufacturing numerous pigments. They are found to be highly toxic and have carcinogenic properties, so it is imperative to treat OA solutions before disposal. In this study a promising approach to degrade OA solutions has been carried out using Fenton’s reagent. Oxidation trials were conducted for 24 hours and various parameters – OA removal, pH, effect of H2O2 and Fe2+, and COD removal – were analysed to understand the oxidative degradation of OA. For varying initial OA concentrations, the OA and COD removal efficiencies of 72 to 85% and 62 to 74%, respectively, were obtained at pH = 3, and at different optimum H2O2 and Fe2+ doses. Lower initial concentrations of OA showed better removal efficiencies. The reaction time was estimated to 360 minutes after which there was negligible degradation occurs.
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Water Science and Technology
Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due... more Currently, reservoirs, lakes, rivers etc. are being overloaded by the demand for fresh water, due to rapid industrialization and population explosion, and also the effluents from industries and domestic wastewater are continuously polluting these resources. To address this issue, several decentralized wastewater treatment system (DWTS) have been installed all over the globe to reuse and recycle wastewater/graywater for non-potable uses such as fire protection, toilet-flushing, and landscape irrigation. In this review, a comparison between different DWTS was carried out to evaluate their performance, merits and limitations. Hybrid technologies like the electrically enhanced biomass concentrator reactor and integration of physical/ biological methods with bio-electrochemical systems such as microbial fuel cells were found to be the most promising methods for near complete removal of pollutants from wastewater and also the issue of membrane fouling was reduced to a good extent.
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Papers by NAVEEN CHATURVEDI