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Effect of Long-Term Sodium Hypochlorite Cleaning on Silicon Carbide Ultrafiltration Membranes Prepared via Low-Pressure Chemical Vapor Deposition

Jan, A. (author), Chen, M. (author), Nijboer, Michiel (author), Luiten-Olieman, Mieke W.J. (author), Rietveld, L.C. (author), Heijman, Sebastiaan (author)

Sodium hypochlorite (NaClO) is widely used for the chemical cleaning of fouled ultrafiltration (UF) membranes. Various studies performed on polymeric membranes demonstrate that long-term (>100 h) exposure to NaClO deteriorates the physicochemical properties of the membranes, leading to reduced performance and service life. However, the effect...

journal article 2024

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How aromatic dissolved organic matter differs in competitiveness against organic micropollutant adsorption

Wang, Q. (author), Lechtenfeld, Oliver J. (author), Rietveld, L.C. (author), Schuster, Jonas (author), Ernst, Mathias (author), Hofman-Caris, Roberta (author), Kaesler, Jan (author), Wang, Chunmiao (author), Yang, Min (author), Yu, Jianwei (author), Zietzschmann, F.E. (author)

Activated carbon is employed for the adsorption of organic micropollutants (OMPs) from water, typically present in concentrations ranging from ng L⁻¹ to μg L⁻¹. However, the efficacy of OMP removal is considerably deteriorated due to competitive adsorption from background dissolved organic matter (DOM), present at...

journal article 2024

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Catalytic pre-coat on ceramic nanofiltration membranes for segregation and Fenton cleaning of high-resistance colloids in direct surface water treatment

Lin, B. (author), Heijman, Sebastiaan (author), Rietveld, L.C. (author)

Ceramic nanofiltration (NF) is a promising alternative for direct surface water treatment, but is hampered for full-scale applications by fouling and a lack of eco-friendly cleaning regimes. In this work, an innovative reactive pre-coat layer, consisting of an iron oxychloride catalyst, was constructed on top of commercial ceramic NF...

journal article 2024

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Embedding Fe(0) electrocoagulation in a biologically active As(III) oxidising filter bed

Roy, M. (author), Kraaijeveld, E. (author), Gude, J.C.J. (author), van Genuchten, Case M. (author), Rietveld, L.C. (author), van Halem, D. (author)

Long-term consumption of groundwater containing elevated levels of arsenic (As) can have severe health consequences, including cancer. To effectively remove As, conventional treatment technologies require expensive chemical oxidants to oxidise neutral arsenite (As(III)) in groundwater to negatively charged arsenate (As(V)), which is more...

journal article 2024

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Ceramic membrane filtration for oily wastewater treatment: Basics, membrane fouling and fouling control

Chen, M. (author), Heijman, Sebastiaan (author), Rietveld, L.C. (author)

Membrane technology presents an effective solution for treating oily wastewater, a significant environmental hazard stemming from industries such as food processing, metalworking, and oil extraction. Compared to polymeric membranes, ceramic ones exhibit superior mechanical, chemical, and thermal stability, enabling more effective oil removal...

review 2024

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Concentration polarizations of PEG and silica colloids in ceramic nanofiltration

Zhang, S. (author), Liang, Yaxin (author), Yang, Cai (author), Venema, Paul (author), Rietveld, L.C. (author), Heijman, Sebastiaan (author)

A large decrease in permeability is often observed during the filtration of nano-sized colloids, while fouling is widely regarded as the main explanation for this phenomenon. The osmotic pressure or concentration polarization (CP) of colloids can also contribute to the flux decline. However, the contribution of CP to flux loss cannot be...

journal article 2024

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Chemical vapor deposition of silicon carbide on alumina ultrafiltration membranes for filtration of microemulsions

Qin, G. (author), Jan, A. (author), An, Q. (author), Zhou, H. (author), Rietveld, L.C. (author), Heijman, Sebastiaan (author)

Worldwide, a considerable amount of oily wastewater is generated, with oil droplets from 2 to 200 nm that are difficult to separate because of their size and colloidal stability. This study presents a novel approach for effectively separating microemulsions via cubic silicon carbide (3C-SiC)-coated alumina (Al ₂O ₃)...

journal article 2024

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Verwijdering van organische microverontreinigingen uit huishoudelijk afvalwater met AdOx

van der Hoek, J.P. (author), Fausta, N. (author), Fu, Mingyan (author), Heijman, Sebastiaan (author), Rietveld, L.C. (author)

Verwijdering van organische microverontreinigingen uit huishoudelijk afvalwater, waaronder medicijnresten, staat sterk in de belangstelling om de oppervlaktewater kwaliteit te verbeteren, de drinkwaterbronnen te beschermen en te voldoen aan toekomstige EU richtlijnen. In minder dan vijf jaar is AdOx, een technologie waarin adsorptie en oxidatie...

journal article 2023

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Start-up of non-bioaugmented pumice biofilters in flow-through and recirculating flow regime for Mn removal

Araya-Obando, José Andrés (author), Rietveld, L.C. (author), Kelly-Coto, Daniel E. (author), Quesada-González, Andrea (author), Caballero-Chavarría, Andrey (author), Romero-Esquivel, Luis G. (author)

Biofilters are effectively used for drinking water treatment. However, the long ripening time of virgin media for manganese (Mn) removal is a major concern. In this study, the influence of the flow regime on the ripening time of virgin pumice medium was investigated. For this purpose, pilot-scale experiments were performed to compare the...

journal article 2023

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Adsorption and cake layer fouling in relation to Fenton cleaning of ceramic nanofiltration membranes

Lin, B. (author), Rietveld, L.C. (author), Yao, Lu (author), Heijman, Sebastiaan (author)

Catalytic ceramic nanofiltration (NF) is a promising technology for direct wastewater reclamation, given its high separation selectivity and reactive surfaces for oxidative removal of fouling. A better understanding of the relation between fouling types and oxidative cleaning efficacy under high organic loading conditions is of practical...

journal article 2023

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Performance of a modified and intermittently operated slow sand filter with two different mediums in removing turbidity, ammonia, and phosphate with varying acclimatization periods

Fitriani, Nurina (author), Theresia, Ledy (author), O'Marga, Timothy Tjahja Nugraha (author), Kurniawan, Setyo Budi (author), Supriyanto, Agus (author), Abdullah, Siti Rozaimah Sheikh (author), Rietveld, L.C. (author)

The present study investigated the utilization of blood clam shells as a potential substitute for conventional media, as well as the influence of the acclimation time on the efficacy of an intermittent slow sand filter (ISSF) in the treatment of real domestic wastewater. ISSF was operated with 16 h on and 8 h off, focusing on the parameters...

journal article 2023

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Oil-in-water emulsion separation: Fouling of alumina membranes with and without a silicon carbide deposition in constant flux filtration mode

Chen, M. (author), Heijman, Sebastiaan (author), Luiten-Olieman, Mieke W.J. (author), Rietveld, L.C. (author)

Ceramic membranes have drawn increasing attention in oily wastewater treatment as an alternative to their traditional polymeric counterparts, yet persistent membrane fouling is still one of the largest challenges. Particularly, little is known about ceramic membrane fouling by oil-in-water (O/W) emulsions in constant flux filtration modes. In...

journal article 2022

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AdOx verwijdert medicijnresten

van der Hoek, J.P. (author), Heijman, Sebastiaan (author), Fu, Mingyan (author), Jiang, N. (author), Rietveld, L.C. (author), Doekhi-Bennani, Y. (author)

AdOx is een combinatie van een adsorptieproces en een oxidatietechniek. Een veelbelovende technologie om medicijnresten uit afvalwater te halen. En winnaar van<br/>de Waterinnovatieprijs 2021, categorie Gezond Water en Gezonde Bodem.

journal article 2022

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Unraveling competition versus adsorbability of dissolved organic matter against organic micropollutants onto activated carbon

Wang, Q. (author), Zietzschmann, F.E. (author), Hofman-Caris, Roberta (author), Jiang, N. (author), Schuster, Jonas (author), Wang, Zheng (author), Yu, Jianwei (author), Yang, Min (author), Rietveld, L.C. (author)

It was widely acknowledged that dissolved organic matter (DOM) in natural water has ubiquitous competitiveness against organic micropollutants (OMPs) during adsorption onto activated carbon. However, some (model) low molecular weight organics have been reported to adsorb onto activated carbon, but were not competitive against co-adsorbates....

journal article 2022

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Monitoring and inverse modelling of hydrogeochemical processes during managed aquifer recharge in Southwestern Bangladesh

Rafiq, M.R. (author), Ahmed, Kazi Matin (author), Rietveld, L.C. (author), van Breukelen, B.M. (author)

Managed Aquifer Recharge (MAR) has been applied as Aquifer Storage, Transfer, and Recovery (ASTR) to provide fresh drinking water for local communities at 99 locations in southwest Bangladesh since 2009. Aerobic freshwater from ponds is filtered and subsequently infiltrated into anaerobic shallow brackish aquifers. At approximately 45% of...

journal article 2022

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Endogeneity in water use behaviour across case studies of household water treatment adoption in developing countries

Daniel, D. (author), Pande, S. (author), Rietveld, L.C. (author)

Endogeneity or reverse causality in regression analysis results in biased estimation of the effects of independent variables on the dependent variable and leads to inaccurate interpretations. However, the biased estimation of the effects of psychological factors on water–related behaviours are rarely discussed. This study investigated the...

journal article 2022

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Sequential Fe²⁺ oxidation to mitigate the inhibiting effect of phosphate and silicate on arsenic removal

Annaduzzaman, M. (author), Rietveld, L.C. (author), Hoque, Bilqis Amin (author), van Halem, D. (author)

Sequential iron (as Fe²⁺) oxidation has been found to yield improved arsenic (as As(III)) uptake than the single-step oxidation. The objective of this study was to gain a better understanding of interactions with phosphate (PO₄³⁻) and silicate (SiO₄²⁻) during sequential Fe²⁺...

journal article 2022

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Softening with Ceramic Micro-Filtration for Application on Water Reclamation for Industrial Recirculating Cooling Systems

Gulamussen, N.J. (author), Donse, D. (author), Marques Arsenio, A. (author), Heijman, Sebastiaan (author), Rietveld, L.C. (author)

There is a global need for optimizing the use of water that has resulted from increased demand due to industrial development, population growth, climate change and the pollution of natural water resources. One of the solutions is to use reclaimed water in industrial applications that do not require water of potable quality, such as cooling water...

journal article 2022

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Groundwater-native Fe(II) oxidation prior to aeration with H₂O₂ to enhance As(III) removal

Roy, M. (author), van Genuchten, Case M. (author), Rietveld, L.C. (author), van Halem, D. (author)

Groundwater contaminated with arsenic (As) must be treated prior to drinking, as human exposure to As at toxic levels can cause various diseases including cancer. Conventional aeration-filtration applied to anaerobic arsenite (As(III)) contaminated groundwater can remove As(III) by co-oxidizing native iron (Fe(II)) and As(III) with oxygen (O...

journal article 2022

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Fluoride removal from water by Ca-Al-CO₃ layered double hydroxides and simultaneous acidification

Wei, L. (author), Zietzschmann, F.E. (author), Rietveld, L.C. (author), van Halem, D. (author)

Millions of people worldwide are exposed to excessive concentrations of fluoride (F⁻) from groundwater sources. Ca-Al-CO₃ layered double hydroxides (LDHs) have shown promising defluoridation efficiency; however, defluoridation by Ca-Al-CO₃ LDHs is highly pH sensitive. This study showed that simultaneous...

journal article 2021