Grey water recycling with corn cob as an adsorbent

Janani, T.; Sudarsan, J. S.; Prasanna, K.

doi:10.1063/1.5112366

Cited by 16 publications

(6 citation statements)

References 16 publications

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“…A study in 2004 recorded multiple phytoplankton, macroalgae seagrass, freshwater, and several other mixed phytoplankton and macroalgal species showed that phytoplankton increases the concentration of nitrate and phosphate ions in water than compared to those macrophytes. [3] Corn cub can be used as an absorbent with an efficiency of 40% BOD (Biochemical Oxygen Demand) [4]. Floating remediation islands housing vegetation to combat eutrophication and excess concentrations of ions sourced from fertilizers [7,8].…”

Section: Literature Reviewmentioning

confidence: 99%

Building an AI-enhanced organic island with Brassica juncea seeds to counter eutrophication

Urs

Vashisht²,

Seshadri³

et al. 2022

J Stud Res

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Decontaminating water bodies has always been a problem in terms of developing and maintaining solutions. Our eutrophication solution is an organic island made of coconut husk(Cocos nucifera) and Indian Mustard(Brassica juncea) plants. It uses remediation techniques, such as phytoremediation and adsorption. Eutrophication primarily stems from human-induced causes such as poor sewage treatment and fertilizer overuse, which results in excess phosphate and nitrate ions accumulating in water bodies. This can have severe consequences, including algal bloom, and a reduction in aquaculture. Our investigation was done over a 21-day period, during which the concentration of phosphate ions was reduced, alleviating one factor that causes eutrophication. There were 3 tanks (A, B, and C): A contained the island and the plants, B contained only the island, and C was a control that contained neither. A Phosphate ion water testing kit was used to measure phosphate ion concentration in the sample contaminated water over a 21 day period. Each phosphate ion test produced a color of a different wavelength. Using a Vernier colorimeter, the percentage of transmittance was measured for each trial. Using the Beer-Lambert Law, the concentration values were obtained, which supported our hypothesis: A and B experienced a substantial increase in transmittance levels, whereas C experienced no change. The Pearson correlation test showed a positive correlation, hence phosphate ions were absorbed at a constant rate. Our solution also uses AI (Bellman equation) to analyze regions with the greatest phosphate ion concentration, where sensors and motors are present for maneuverability.

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Section: Literature Reviewmentioning

confidence: 99%

Building an AI-enhanced organic island with Brassica juncea seeds to counter eutrophication

Urs

Vashisht²,

Seshadri³

et al. 2022

J Stud Res

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“…23 Corn cob holds the same potential as cellulose acetate as a purification system. [24][25][26][27][28][29][30] However, handling corn cobs as part of filtration units is difficult.…”

Section: Introductionmentioning

confidence: 99%

An all‐green cellulose acetate/corn cob composite membrane filter: A critical evaluation of its morphology and adsorption characteristics for dyes and heavy metals

Aswathy,

Sen,

Mongaraj

et al. 2024

J of Applied Polymer Sci

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Industrial wastewater from various manufacturing sectors poses a significant environmental concern due to the release of dyes, heavy metals, and pollutants into natural water streams. Effective treatment of large volumes of industrial wastewater is crucial to mitigate this issue. Conventional industrial wastewater filtration systems often prove to be inefficient, necessitating the exploration of alternative and cost‐effective water filtration methods. In this study, we drew inspiration from the natural adsorption and purification properties of corncob to develop a novel green composite membrane filter. The composite membrane filters, named MCAPCB and MCATPCB, were formulated by incorporating powdered corncob (PCB) and alkali/hydrogen peroxide‐treated powdered corncob (TPCB) into cellulose acetate. The adsorption properties of the composite filters were evaluated using UV–Vis spectrophotometry for dye adsorption and inductively coupled plasma optical emission spectroscopy (ICP‐OES) and atomic absorption spectroscopy (AAS) for heavy metal adsorption. The results demonstrated that MCATPCB20, incorporating 20 wt% TPCB, exhibited remarkable performance in the removal of methylene blue dye, with an adsorption efficiency of 97.46%. In comparison, MCAPCB20, incorporating 20 wt% PCB, achieved a dye adsorption efficiency of 80.15%. Moreover, MCATPCB20 displayed exceptional heavy metal removal capabilities, effectively rejecting 98% and 95% of cadmium and lead, respectively, from water samples containing 1 ppm of each metal. The composite filter membranes containing 20 wt% TPCB exhibited superior adsorption efficiency, flexibility, and stability. This enhanced performance can be attributed to the higher carboxyl content in TPCB, achieved through alkali treatment, which significantly increased the adsorption capacity of MCATPCB20. Characterization studies employing XRD, SEM, contact angle, BET, ICP‐OES, and UV measurements further supported the efficacy of MCATPCB as an effective filter system for water purification.

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“…[ 3,4 ] Furthermore, corn cob (CC) is an abundant and low‐cost agricultural by‐product, and the majority of this waste is inappropriately discarded, causing environmental pollution. [ 5 ] Currently, diverse physical and chemical methodologies for treating coloured effluents are available, such as flocculation, oxidation, heterogeneous photocatalysis, ozonation, and filtration. These methods exhibit difficulties compared with the adsorption process owing to the generation of residues that are more toxic than the dye being treated.…”

Section: Introductionmentioning

confidence: 99%

Phenomenological‐based model of direct blue 2 adsorption on corncob in a fixed‐bed

Presiga‐Posada,

Alvarez,

Hormaza

2023

Can J Chem Eng

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This work presents a phenomenologically based semi‐physical model (PBSM) for the liquid–solid adsorption process, which has been experimentally validated. Two modes of operation of adsorption of direct blue 2 dye (DB2) on corn cobs in a fixed bed are discussed by applying the PBSM. The first mode of operation is the typical continuous liquid flow, whereas the second is a semicontinuous mode with the recirculation of liquid leaving the column. These modes of operation were used to illustrate different ways in which the system reaches equilibrium conditions. The equilibrium distribution curve (EDC) for low DB2 concentration was reached with the best fit using the Langmuir–Freundlich model (). The local mass transfer coefficient for the solid phase was evaluated by the PBSM deduction, and subsequently, the diffusivity of the surface solid was experimentally evaluated through comparison in terms of the PBSM. Regardless of the mode of operation, surface diffusion is associated with only the nature of the adsorbent material rather than the concentration of the liquid phase. In addition, the PBSM exhibited liquid and solid concentration changes at different points in the column. Moreover, different operating curves of the process were constructed and validated, exhibiting similar results when comparing the predictions of the model and the experimental data. These findings support the strength of the constructed model, enabling its extension to other adsorbent–dye systems.

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Grey water recycling with corn cob as an adsorbent

Cited by 16 publications

References 16 publications

Building an AI-enhanced organic island with Brassica juncea seeds to counter eutrophication

Building an AI-enhanced organic island with Brassica juncea seeds to counter eutrophication

An all‐green cellulose acetate/corn cob composite membrane filter: A critical evaluation of its morphology and adsorption characteristics for dyes and heavy metals

Phenomenological‐based model of direct blue 2 adsorption on corncob in a fixed‐bed

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