Turbidity removal from synthetic turbid water using coagulant recovered from water treatment sludge: A potential method to recycle and conserve aluminium

Dahasahastra, Aniket V.; Balasundaram, Karthik; Latkar, M. V.

doi:10.1016/j.hydromet.2022.105939

Cited by 17 publications

(6 citation statements)

References 49 publications

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“…Several methods are available for removing fluoride from water, including precipitation-coagulation, membrane-based processes, ion exchange, and adsorption. The precipitation-coagulation method generates a significant amount of sludge and may involve the leaching of undesirable components [4]. Membrane processes are expensive, and fouling is an inevitable problem [5].…”

Section: Present Methodsmentioning

confidence: 99%

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

D. Valli Sowbhagyam,

K Rashi,

A. Renuka Devi

et al. 2024

Int Res J Adv Engg Mgt

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This study conducts a comprehensive comparative analysis of various strategies and technologies employed for the removal of fluorides from groundwater, addressing the increasing concern over elevated fluoride levels in water sources. High fluoride concentrations pose significant health risks, including dental and skeletal fluorosis, necessitating effective and sustainable removal methods. The research evaluates the efficiency, cost-effectiveness, and environmental impact of different fluoride removal techniques, providing valuable insights for water treatment practitioners, policymakers, and communities grappling with fluoride-contaminated groundwater. The study begins by outlining the prevalence of fluoride contamination in groundwater and the associated health risks, establishing the critical need for reliable removal methods. Subsequently, a review of existing literature presents an overview of conventional and emerging technologies utilized for fluoride removal. Conventional methods such as coagulation, precipitation, and adsorption are examined, considering their efficiency, operational ease, and cost implications. The study then delves into advanced technologies like membrane processes, ion exchange, and electrochemical methods, assessing their applicability and effectiveness in diverse groundwater contexts. Environmental sustainability is a key focus throughout the analysis, with a critical examination of the by-products and waste generated by each removal method. The ecological footprint, including energy consumption and material usage, is considered to provide a holistic understanding of the environmental impact associated with fluoride removal technologies. Furthermore, the economic feasibility of each method is evaluated, considering capital and operational costs. Comparative cost analyses offer insights into the affordability and scalability of different removal technologies, aiding decision-makers in selecting suitable methods based on financial constraints. The study concludes with a synthesized overview of the comparative analysis, emphasizing the strengths and limitations of each fluoride removal method. In summary, this comparative study contributes to the broader understanding of fluoride removal technologies, facilitating informed decision-making in addressing groundwater contamination. The findings are anticipated to inform researchers, water treatment professionals, and policymakers, guiding the selection of appropriate and context-specific fluoride removal methods to ensure safe and potable groundwater sources

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Section: Present Methodsmentioning

confidence: 99%

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

D. Valli Sowbhagyam,

K Rashi,

A. Renuka Devi

et al. 2024

Int Res J Adv Engg Mgt

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“…The recovery of Al or Fe from DWTR can be done by different techniques such as acidification, 2,14,17,50–52 alkalization, 14 roasting 53 dialysis or ultrafiltration, 1 or adsorptive capacity can be improved through redox actions such as oxygen-limiting treatment. 54 This allows the possibility of repeating the coagulation process of the two metals Al and Fe (often as sulfates) for efficient reuse as adsorbents to remove either turbidity, total suspended solids, chemical oxygen demand, or phosphorus from various wastewater.…”

Section: Adsorption: Simplified Mechanisms and Main Controlling And L...mentioning

confidence: 99%

Re-utilization of drinking water treatment residuals (DWTR): a review focused on the adsorption of inorganic and organic contaminants in wastewater and soil

Belzile,

Chen

2024

Environ. Sci.: Water Res. Technol.

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“…We recommend that Equation [1] be used as a regression model, as it incorporates all continuous variables or parameters. The parameters which affect the compressive strength, flexural strength, and DYE are w/b ratios, curing age, amount of n-SiO 2 , and Ca-SiO 3 (44,45).…”

Section: Regression Analysis Of Mechanical Propertiesmentioning

confidence: 99%

“…P-value was considered to find the significant (p ≤ 0.05) and insignificant (p > 0.05) paramters. The statistically insignificant parameters can be omitted from the final Equation [2] (45). [2] Where, f c -Compressive strength Similarly, flexural strength and DYE were statistically analysed with identical parameters, and the following equations were found.…”

Section: Regression Analysis Of Mechanical Propertiesmentioning

confidence: 99%

β-CaSiO3 and colloidal n-SiO2 based blended cement composites- their properties, regression analysis and micro-characterization studies

Nair

Viswanathan

2023

materconstrucc

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This paper examines the effect on mechanical properties such as compressive strength, flexural strength, and dynamic modulus of elasticity (DYE) of different proportions of wollastonite (β-CaSiO3) and colloidal nano-silica (n-SiO2) partially replacing cement. Durability indicators (water absorption, sorptivity and sulphate treatment test) were also examined to ascertain the quality of hardened paste mixes with respect to the control mix. The regression models were found for mechanical properties using different parameters from the results obtained, and statistical relations were established and validated. Regression analysis shows the significance of every parameter considered and model for the prediction of mechanical strengths. Finally, the results were substantiated by the microstructural characterization by FESEM. β-CaSiO3 and colloidal n-SiO2 replaced cement by 15%, and 1.5%-6% with an offset of 1.5%, respectively at low (0.25), medium (0.40) and high (0.55) water/binder (w/b) ratio. FESEM micrographs showed dense Calcium-silicate-hydrate (CSH) gel and stratlingite (CASH) was formed by blended cement paste mixes containing β-CaSiO3 and n-SiO2. n-SiO2 at 3% and CaSiO3 at 15% replacements of cement (NS3 mix) was the optimum replacement level for the cement paste mix. Analysed regression model suggests that the models and parameters were found significant and can also be used for prediction (based on R2 values and p-value).

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Turbidity removal from synthetic turbid water using coagulant recovered from water treatment sludge: A potential method to recycle and conserve aluminium

Cited by 17 publications

References 49 publications

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

Re-utilization of drinking water treatment residuals (DWTR): a review focused on the adsorption of inorganic and organic contaminants in wastewater and soil

β-CaSiO3 and colloidal n-SiO2 based blended cement composites- their properties, regression analysis and micro-characterization studies

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