Drinking water treatment residuals, a low-cost and environmentally friendly adsorbent for the removal of hormones - A review

Dias, Rita; Daam, Michiel A.; Diniz, Mário; Maurício, Rita

doi:10.1016/j.jwpe.2023.104322

Cited by 11 publications

(2 citation statements)

References 156 publications

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“…This expression enables the evaluation of the interactions between the adsorbent and the adsorbate by estimating the surface functional group ionization. When the pH of the solution is above the pHpzc value (zero charge the adsorbent surface carries a negative charge, in which case it shows a tendency to affinity towards cations (positively when the pH of the solution is lower than pHpzc, the surface becomes positively charged and shows affinity for negative charges (Dias et al 2023).…”

Section: Effect Of Phmentioning

confidence: 99%

“…When the pH of the solution is above the pHpzc value (zero charge point), the adsorbent surface carries a negative charge, in which case it shows a tendency to affinity towards cations (positively charged species). Otherwise, when the pH of the solution is lower than pHpzc, the surface becomes positively charged and shows affinity for negative charges (Dias et al 2023 ).…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

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Synthesis of zeolite from industrial wastes: a review on characterization and heavy metal and dye removal

Eren,

Türk,

Arslanoğlu

2024

Environ Sci Pollut Res

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Increasing world population, urbanization, and industrialization have led to an increase in demand in production and consumption, resulting in an increase in industrial solid wastes and pollutant levels in water. These two main consequences have become global problems. The high Si and Al content of solid wastes suggests that they can be used as raw materials for the synthesis of zeolites. In this context, when the literature studies conducted to obtain synthetic zeolites are evaluated, it is seen that hydrothermal synthesis method is generally used. In order to improve the performance of the hydrothermal synthesis method in terms of energy cost, synthesis time, and even product quality, additional methods such as alkaline fusion, ultrasonic effect, and microwave support have been developed. The zeolites synthesized by different techniques exhibit superior properties such as high surface area and well-defined pore sizes, thermal stability, high cation exchange capacity, high regeneration ability, and catalytic activity. Due to these specific properties, zeolites are recognized as one of the most effective methods for the removal of pollutants. The toxic properties of heavy metals and dyes in water and their carcinogenic effects in long-term exposure pose a serious risk to living organisms. Therefore, they should be treated at specified levels before discharge to the environment. In this review study, processes including different methods developed for the production of zeolites from industrial solid wastes were evaluated. Studies using synthetic zeolites for the removal of high levels of health and environmental risks such as heavy metals and dyes are reviewed. In addition, EPMA, SEM, EDX, FTIR, BET, AFM, and 29Si and 27Al NMR techniques, which are characterization methods of synthetic zeolites, are presented and the cation exchange capacity, thermodynamics of adsorption, effect of temperature, and pH are investigated. It is expected that energy consumption can be reduced by large-scale applications of alternative techniques developed for zeolite synthesis and their introduction into the industry. It is envisaged that zeolites synthesized by utilizing wastes will be effective in obtaining a green technology. The use of synthesized zeolites in a wide variety of applications, especially in environmental problems, holds great promise. Graphical Abstract

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Section: Effect Of Phmentioning

confidence: 99%

Section: Characterization Of the Materialsmentioning

confidence: 99%