Biological ion exchange as an alternative to biological activated carbon for drinking water treatment

Liu, Zhen; Lompe, Kim Maren; Mohseni, Madjid; Bérubé, Pierre R.; Sauvé, Sébastien; Barbeau, Benoît

doi:10.1016/j.watres.2019.115148

Cited by 49 publications

(23 citation statements)

References 27 publications

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“…Usually, coagulation/sedimentation/filtration (Zhang et al 2017), biological activated carbon filtration (Liu et al 2020) and ion exchange (Cornelissen et al 2009) are the three most used technologies to removal HA from waters. MIEX resin is a strong base resin with chloride as exchangeable ion, equipped with macro-porous polyacrylic matrix and marketed by Orica Watercare (Ding et al 2012a;Yang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of humic acid fractions by a magnetic ion exchange resin

Ding

Wang

et al. 2022

Water Science and Technology

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Natural organic matter in waters varies in different fractions. To better understand the removal of different fractions by a magnetic ion exchange (MIEX) resin and the mechanism behind it, this study investigated adsorption kinetics, equilibrium and thermodynamics of humic acid (HA) fractions with different hydrophilic-hydrophobic properties and molecular weights on MIEX resin through a series of batch experiments. MIEX resin can effectively remove approximately 40% of hydrophilic and 30% of hydrophobic HA components, as well as approximately 44% of molecular weight (MW) <10 kDa to some degree. The removal efficiency of HA fractions by MIEX resin reduced with the increase of pH from 6 to 9. Adsorption kinetics of different HA fractions on MIEX resin fitted the pseudo-second-order model well. With the increase of MW of HA from <1 kDa to >10 kDa, the time to reach adsorption equilibrium reduced from 180 to 120 min. It took more time for the hydrophilic fractions (140 min) to reach the equilibrium than for hydrophobic HA fractions (120 min). The Sips model fitted the adsorption equilibrium data of HA fractions on MIEX resin well. It was revealed that the adsorption of HA fractions on MIEX resin was spontaneous, endothermic and an entropy driven process, and the chemisorption might dominate the adsorption of HA components on MIEX resin. This study is of great significance to the design of magnetic ion exchange resin reactors and the optimization of operational parameters for the removal of natural organic matter with different hydrophilic-hydrophobic properties and molecular weights in different water sources.

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Section: Introductionmentioning

confidence: 99%

Adsorption of humic acid fractions by a magnetic ion exchange resin

Ding

Wang

et al. 2022

Water Science and Technology

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“…Research efforts have been conducted to remove these contaminants from water/wastewater using several methods such as adsorption [ 3 , 4 , 5 ], electrolysis [ 6 ], electrodialysis [ 7 ], ion-exchange [ 8 ], reverse osmosis [ 9 ], conventional coagulation [ 10 ], and chemical precipitation [ 11 ]. Many of these methods, such as electrodialysis, electrolysis, ion-exchange, and reverse osmosis, are expensive and cannot be applied in developing countries.…”

Section: Introductionmentioning

confidence: 99%

Clay-Polymer Nanocomposites: Preparations and Utilization for Pollutants Removal

et al. 2021

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Nowadays, people over the world face severe water scarcity despite the presence of several water sources. Adsorption is considered as the most efficient technique for the treatment of water containing biological, organic, and inorganic contaminants. For this purpose, materials from various origins (clay minerals, modified clays, zeolites, activated carbon, polymeric resins, etc.,) have been considered as adsorbent for contaminants. Despite their cheapness and valuable properties, the use of clay minerals as adsorbent for wastewater treatment is limited due to many factors (low surface area, regeneration, and recovery limit, etc.). However, clay mineral can be used to enhance the performance of polymeric materials. The combination of clay minerals and polymers produces clay-polymers nanocomposites (CPNs) with advanced properties useful for pollutants removal. CPNs received a lot of attention for their efficient removal rate of various organic and inorganic contaminants via flocculation and adsorption ability. Three main classes of CPNs were developed (exfoliated nanocomposites (NCs), intercalated nanocomposites, and phase-separated microcomposites). The improved materials can be explored as novel and cost-effective adsorbents for the removal of organic and inorganic pollutants from water/wastewater. The literature reported the ability of CPNs to remove various pollutants such as bacteria, metals, phenol, tannic acid, pesticides, dyes, etc. CPNs showed higher adsorption capacity and efficient water treatment compared to the individual components. Moreover, CPNs offered better regeneration than clay materials. The present paper summarizes the different types of clay-polymers nanocomposites and their effective removal of different contaminants from water. Based on various criteria, CPNs future as promising adsorbent for water treatment is discussed.

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“…In light of that, techno-viable wastewater management techniques need to be developed and implemented, particularly in low-and middle-income countries (LMIC) such as South Africa, to address this problem. According to various standards and water quality limits, the proposed level for ammonia and phosphate should be ≤1.5 mg L -1 and ≤10 mg L -1 , respectively, when discharged to the receiving environment, albeit ammonia can be converted into nitrate or nitrite with prescribed limits of ≤11 and ≤0.90 mg L -1 , respectively [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Advocating circular economy in wastewater treatment: Struvite formation and drinking water reclamation from real municipal effluents

Mavhungu

Masindi

Foteinis

et al. 2020

Journal of Environmental Chemical Engineering

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In this pilot study, the circular economy concept in wastewater treatment was examined, through a zero liquid discharge (ZLD) process where struvite was recovered and drinking water was reclaimed. A stage wise approach was used for struvite formation and the subsequent reclamation of drinking water. Specifically, the early stages of treatment entail the synthesis of struvite via the chemical precipitation of nutrients (phosphate and ammonia), using thermally activated cryptocrystalline magnesite. Thence, reverse osmosis (RO) was employed for drinking water reclamation. With this dual approach, 3.5 m 3 of municipal wastewater were successfully treated at a pilot plant in South Africa, producing ~52.5 kg of struvite and ~3.4 m 3 of drinking water. The operating parameters were 30 min of residence time, 0.5 g : 500 mL solid to liquid (S/L) ratio, using ambient temperature and pH. X-ray diffraction (XRD) and High Resolution Scanning Electron Microscopy (HR-SEM) coupled with electron dispersion spectroscopy (EDS) confirmed the synthesis of struvite and the presence of notable Mg/P ratios. Fourier Transform Infrared Spectrometer (FTIR) further ascertained the obtained results. Moreover, it was identified that the reclaimed water meets the South African National Standard (SANS) 241 and the world health organisation (WHO) standards for drinking water. An economic analysis revealed the viability of the process, suggesting that the system could be self-sustainable. Therefore, the results of this work indicate that introducing the concept of circular economy in wastewater treatment can promote the sustainable management of the ever-increasing quantities of municipal wastewater and at the same time address problems of emerging concern, such as water scarcity and phosphate shortage.

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Biological ion exchange as an alternative to biological activated carbon for drinking water treatment

Cited by 49 publications

References 27 publications

Adsorption of humic acid fractions by a magnetic ion exchange resin

Adsorption of humic acid fractions by a magnetic ion exchange resin

Clay-Polymer Nanocomposites: Preparations and Utilization for Pollutants Removal

Advocating circular economy in wastewater treatment: Struvite formation and drinking water reclamation from real municipal effluents

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