School Of Environment And Earth Sciences

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Subject: search.filters.subject.Wastewater

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    Robust removal of cationic dyes by zinc ferrite composites in single and ternary dye systems
    (Elsevier B.V., 2023-05-02T00:00:00) Rimzim; Singh, Jandeep; Mittal, Sunil; Singh, Harminder
    For the continuous economic growth and development of society, clean and safe water is the basic necessity. Therefore, it is necessary to treat contaminated water. Magnetic ferrite composites with bio-waste materials are less explored in the area of research, so these need to be focused. In present study, novel magnetic Zinc Ferrite Pine Cone composite was prepared and used for the efficient removal of Crystal Violet, Malachite Green and Methylene Blue (Dye) from aqueous solution in single and ternary dye system. Various characterization techniques such as FTIR (Fourier Transform Infrared Spectroscopy), XRD (X-Ray Diffraction), FE-SEM (Field Emission Scanning Electron Microscopy), EDS (Energy Dispersive Spectroscopy), TGA (Thermogravimetric Analysis) and BET (Brunauer-Emmett-Teller Analysis) are used for the structure elucidation of Zinc Ferrite and Zinc Ferrite Pine cone (Composite). Batch adsorption method was used for the removal of dyes in single and ternary dye system. Lagergren pseudo second order adsorption model fits best in the kinetic studies whereas, Langmuir adsorption isotherm showed better results with maximum adsorption capacity 76.33, 200 and 94.33 mg/g for single dye system and 9.46, 20.45 and 27.93 mg/g respectively in ternary dye system for dyes CV, MG and MB. Thermodynamic study confirmed about the spontaneous nature of adsorption process. The regeneration ability of the composite in both the systems was studied up to five cycles. So, it becomes clear that the composite (Zinc Ferrite Pine Cone) will work as best alternative for dyes removal in single and ternary dye system. � 2023 Elsevier B.V.
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    A decadal analysis to unravel the global status of emerging contaminants in wastewaters and comparison with the Indian context
    (Elsevier B.V., 2022-07-07T00:00:00) Kerketta, Anjali; Sahoo, Prafulla Kumar
    The prevalence of emerging contaminants (ECs) in wastewaters is troublesome because of their widespread and persistent nature, posing a threat to living organisms when exposed for prolonged durations. We conducted an extensive literature assessment for this study to present the overall global status of the occurrence of ECs regardless of their class by compiling relevant publications from the previous decade. The most commonly investigated category were pharmaceuticals (particularly antibiotics and anti-inflammatories/analgesics), personal care products (PCPs), and industrial chemicals (IDC). The most concentrated compounds in the global influents and effluents were Acetaminophen (500 ?g/L), an analgesic, and Saccharine (379 ?g/L), an artificial sweetener, reported from Canada and India, respectively. Irrespective of its prevalence, the presence of artificial sweeteners (ASWs), surfactants, etc., in wastewaters have often been overlooked. Most of the sub-classes exhibited minor to moderate elimination efficiency, with anti-diabetic drugs showing the highest among all. However, insignificant changes (artificial sweeteners, phthalates, etc.) and negative removal (anti-depressants, anti-psychotics, etc.) were also observed. Furthermore, Caffeine, Ampicillin, and Trimethoprim were reported at extremely high concentrations in India than in the rest of the world. Irgasan, Benzothiazoles, Sparfloxacin, etc., were also quite predominant in India, which has yet to be recorded in any other country. Therefore, the universally implemented conventional approaches are incapable of total elimination for all ECs. Hence, the traditional methods should be paired with the advanced techniques that have shown positive removal for certain ECs, which can be a promising solution to this problem. These findings will aid in establishing which classes and compounds demand immediate attention for further investigation and monitoring, allowing water managers to take necessary measures to reduce pollutant levels at the source and develop water protection policies. � 2022 Elsevier B.V.
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    Treatment of seafood processing wastewater using upflow microbial fuel cell for power generation and identification of bacterial community in anodic biofilm
    (Academic Press, 2016) Jayashree, C.; Tamilarasan, K.; Rajkumar, M.; Arulazhagan, P.; Yogalakshmi, K.N.; Srikanth, M.; Banu, J.R.
    Tubular upflow microbial fuel cell (MFC) utilizing sea food processing wastewater was evaluated for wastewater treatment efficiency and power generation. At an organic loading rate (OLR) of 0.6 g d-1, the MFC accomplished total and soluble chemical oxygen demand (COD) removal of 83 and 95%, respectively. A maximum power density of 105 mW m-2 (2.21 W m-3) was achieved at an OLR of 2.57 g d-1. The predominant bacterial communities of anode biofilm were identified as RB1A (LC035455), RB1B (LC035456), RB1C (LC035457) and RB1E (LC035458). All the four strains belonged to genera Stenotrophomonas. The results of the study reaffirms that the seafood processing wastewater can be treated in an upflow MFC for simultaneous power generation and wastewater treatment. ? 2016 Elsevier Ltd.
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    Effect of organic loading rate on electricity generating potential of upflow anaerobic microbial fuel cell treating surgical cotton industry wastewater
    (Elsevier Ltd, 2017) Tamilarasan, K.; Banu, J.R.; Jayashree, C.; Yogalakshmi, K.N.; Gokulakrishnan, K.
    In this study, the performance of continuous fed upflow anaerobic microbial fuel cell operated with surgical cotton industry wastewater was investigated at different Organic Loading Rate (OLR). The potency of power generation, COD and TSS removal efficiency was determined. The highest TCOD and SCOD removal of 78.8% and 69%, respectively was accomplished at an optimum OLR of 1.9 gCOD/L d. A 62% TSS removal efficiency was obtained, with an initial TSS concentration of wastewater as 970 ? 70 mg/L. The maximum power density 116.03 mW/m2 (2.2 W/m3) and corresponding coulombic efficiency of 17.8% was achieved at the OLR of 1.9 gCOD/L/d while treating surgical cotton industry waste water. ? 2017 Elsevier Ltd.