A review on the current techniques and technologies of organic pollutants removal from water/wastewater

Hanafi, Muhammad Farhan

doi:10.1016/j.matpr.2021.01.265

Cited by 38 publications

(19 citation statements)

References 113 publications

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“…Inhalation and adsorption through the skin are all possible ways of intake, which could cause liver, kidney, muscle and brain tissue damage [ 3 ]. So far, to effectively remove organic pollutants from wastewater, several analytical techniques such as precipitation, oxidation, bio- or photocatalytic-degradation and physical adsorption have been developed [ 4 , 5 ]. However, in some cases, the use of these techniques is limiting in terms of accuracy due to the low analyte concentrations and poor selectivity towards a particular pollutant present in complex environmental samples.…”

Section: Introductionmentioning

confidence: 99%

Molecularly Imprinted Polymers Based on Chitosan for 2,4-Dichlorophenoxyacetic Acid Removal

Silvestro

Ciarlantini

Francolini

et al. 2022

IJMS

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The development of low-cost and eco-friendly materials for the removal of pollutants from water is one of the main modern challenges. For this purpose, molecularly imprinted polymers were prepared under optimized conditions starting from chitosan (CS), chemically or ionically modified with glycidyl methacrylate (GMA) or itaconic acid (ITA), respectively. 2,4-Dichlorophenoxyacetic acid (2,4-D) was used as a template, obtaining the CS_GMA and CS_ITA series. The influence of the template concentration on the MIPs’ (molecularly imprinted polymers) morphology, thermal behaviour and swelling ability, as well as on the 2,4-D removal capacity, were analyzed. The amount of the template used for the imprinting, together with the different permeability of the matrices, were the key factors driving the analyte uptake process. Despite the good performance shown by the non-imprinted CS_GMA sample, the best results were obtained when CS_GMA was imprinted with the highest amount (5%) of template (CS_GMA_5). This system was also more efficient when consecutive adsorption experiments were carried out. In addition, CS_GMA_5 had a desorption efficiency of 90–100% when a low pesticide concentration was used. These findings suggest that the presence of imprinted cavities could be useful in improving the performance of sorbent materials making CS_GMA_5 a possible candidate for 2,4-D removal.

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Section: Introductionmentioning

confidence: 99%

Molecularly Imprinted Polymers Based on Chitosan for 2,4-Dichlorophenoxyacetic Acid Removal

Silvestro

Ciarlantini

Francolini

et al. 2022

IJMS

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“…The organic pollutants are removed through oxidation or incorporation into the living cells or through utilizing them as a source of carbon and energy [121], whereas some inorganic pollutants are removed through secondary mechanisms such as by the production of extracellular polymeric substances like polysaccharides and proteins. These substances are able to produce complexes with metal ions, thereby removing them from the aqueous medium [122]. Moreover, microorganisms have the capabilities to withstand the high toxicity of these metals and can also remediate these metals through a variety of metabolic processes resulting in oxidation and reduction of these metals [123].…”

Section: Treatment Of Groundwater By Biological Treatment Methodsmentioning

confidence: 99%

Removal of Toxic Elements and Microbial Contaminants from Groundwater Using Low-Cost Treatment Options

et al. 2021

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Purpose of Review This paper reviews various low-cost treatment techniques such as adsorption, permeable reactive barrier, and biological techniques for the simultaneous removal of chemical and microbial contaminants from groundwater and discusses treatment mechanisms of different treatment techniques. This paper also discusses the challenges of groundwater treatment, how to choose the appropriate treatment technique, and cost analysis of groundwater treatment. Recent Findings Various treatment technologies have been used for the treatment of groundwater: physical, chemical, and biological technologies with different success rates. In the literature, various adsorbents have been successfully synthesized from low-cost and environmentally friendly materials. Adsorption is considered an efficient treatment technique for the removal of both toxic elements and pathogens by utilizing different adsorbents. For example, the nanostructures of MgO with a BET surface area of up to 171 m2/g obtained a very high adsorption capacity of 29,131 mg/g for fluoride ions in water, while the incorporation of iron in activated carbon has improved its adsorption capacity to 51.3 mg/g for arsenic. Moreover, certain adsorbents have shown the capability to remove 99% of the rotavirus and adenovirus from groundwater. Summary Groundwater resources are contaminated with toxic metals and pathogens. Therefore, water treatment technologies should be evaluated for their efficiency to remove such contaminants. Determination of the most cost-effective and efficient treatment technique is not an easy task and requires the understanding of various aspects such as the contaminants present in water, the reuse options considered, and cost analysis of the treatment technique.

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“…According to the research, they are among the most significant/problematic water pollutants [ 4 , 5 , 9 , 10 , 11 ]. The majority of synthetic dyes are toxic, carcinogenic, poorly biodegradable, stable to light and heat, highly soluble in water, rapidly transferred to water, accumulate in living cells, and more [ 1 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…On the market, there are more than 100,000 different types of dyes, and more than 7.105 tons of dyes are mass-produced each year worldwide [ 15 , 16 ]. According to expert studies, approximately 2% of these synthetic dyes are lost during industrial processing steps, and 15–25% of the yearly worldwide dye production is misplaced in the coloring process and dumped into the water without additional treatment [ 4 , 10 , 11 , 12 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…There are four types of wastewater treatment technology: physical, chemical, biological, and electrochemical [ 5 ]. Ion exchange, precipitation, reverse osmosis, adsorption, flocculation/coagulation, oxidative processes, and membrane filtration are physical and chemical methods used to treat industrial wastewater containing dyes [ 15 , 17 , 18 , 19 , 20 , 21 ]. These approaches, however, have a variety of drawbacks in terms of cost, viability, influence on the environment, effectiveness, operational difficulty, handling of toxic by-products, etc.…”

Section: Introductionmentioning

confidence: 99%

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Biosorbent Based on Poly(vinyl alcohol)–Tricarboxi-Cellulose Designed to Retain Organic Dyes from Aqueous Media

et al. 2023

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Methylene Blue, a cationic dye, was retained from aqueous solutions using a novel biosorbent made of poly(vinyl alcohol) reticulated with tricarboxi-cellulose produced via TEMPO oxidation (OxC25). The study of the Methylene Blue biosorption process was performed with an emphasis on operational parameters that may have an impact on it (such as biosorbent concentration, pH of the aqueous media, and temperature). The current study focused on three areas: (i) the physic-chemical characterization of the biosorbent (scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX)); (ii) biosorption data modeling to determine the quantitative characteristic parameters employing three equilibrium isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich—DR); and (iii) the study of temperature influence. The results of the study showed that the Langmuir model provided a good fit for the experimental data of biosorption, realizing a maximum capacity of 806.45 mg/g at 20 °C. The free energy of biosorption (E) evaluated by the DR equation was in the range of 6.48–10.86 KJ/mol. The values of the thermodynamic parameters indicated an endothermic process because the free Gibbs energy ranged from −9.286 KJ/mol to −2.208 KJ/mol and the enthalpy was approximately −71.686 KJ/mol. The results obtained encourage and motivate the further study of this biosorption process by focusing on its kinetic aspects, establishing the biosorption’s controlled steps, identifying the mechanism responsible for the retention of textile dyes presented in moderate concentration in aqueous media, and studying the biosorption process in a dynamic regime with a view to applying it to real systems.

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A review on the current techniques and technologies of organic pollutants removal from water/wastewater

Cited by 38 publications

References 113 publications

Molecularly Imprinted Polymers Based on Chitosan for 2,4-Dichlorophenoxyacetic Acid Removal

Molecularly Imprinted Polymers Based on Chitosan for 2,4-Dichlorophenoxyacetic Acid Removal

Removal of Toxic Elements and Microbial Contaminants from Groundwater Using Low-Cost Treatment Options

Biosorbent Based on Poly(vinyl alcohol)–Tricarboxi-Cellulose Designed to Retain Organic Dyes from Aqueous Media

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