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Kraaijeveld, E. (author), Rijsdijk, S. (author), van der Poel, S. (author), van der Hoek, J.P. (author), Rabaey, K. (author), van Halem, D. (author)The mechanisms and by-product formation of electrochemical oxidation (EO) for As(III) oxidation in drinking water treatment using groundwater was investigated. Experiments were carried out using a flowthrough system, with an RuO <sub>2</sub>/IrO <sub>2</sub> MMO Ti anode electrode, fed with synthetic and natural groundwater containing As(III)...journal article 2024
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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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Santoro, Sergio (author), Occhiuzzi, Jessica (author), Aquino, Marco (author), Politano, Antonio (author), Straface, Salvatore (author), D'Andrea, Giuseppe (author), Carrillo, Cristobal (author), Mallada, Reyes (author), Garcia, Andreina (author), Estay, Humberto (author), Xevgenos, Dimitris (author), Argurio, Pietro (author), Curcio, Efrem (author)This work proposes an innovative integration of Membrane Distillation (MD) and photo-oxidation for a continuous recovery of water from arsenic (As) contaminated solutions coupled with the oxidation of arsenite (As(III)) into arsenate (As(V)). Polyvinylidene fluoride (PVDF) mixed matrix membranes (MMMs) containing titanium dioxide...journal article 2024
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Stuyfzand, Pieter Jan (author), Bonte, Matthijs (author)Arsenic is a common trace element in groundwater and its fate and transport are controlled by combination of (i) natural processes, including redox conditions, salinity and pH, (ii) sedimentary and geochemical environment, and (iii) anthropogenic influences such as groundwater extraction, managed aquifer recharge (MAR), Aquifer Thermal Energy...journal article 2023
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Ghosh, D. (author), Kavil, Sarath Pullyottum (author), Arya, Prakash C. (author), Das, Bhaskar (author)Enormous water-logging in ancient abandoned mining shafts of Kolar Gold Fields (KGFs), has largely induced the leaching of sulfide-rich gold minerals contaminating the aquifer system with hazardous elements. Transport of these contaminant has posed threat to the health of the urban population of Kolar township. A detailed survey of borewells,...journal article 2023
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Zhao, Yingliang (author), Sun, Yong (author), Guo, Z. (author), Qiu, Jingping (author), Sun, Xiaogang (author)Hazardous wastes are commonly immobilized using cementitious materials. Ettringite (Ca<sub>6</sub>Al<sub>2</sub>(OH)<sub>12</sub>(SO<sub>4</sub>)<sub>3</sub>∙26H<sub>2</sub>O) is one of the main components of hydrated cement and is known to stabilize anionic species. Thus, it is a promising material for the stabilization of arsenate (As(V))...journal article 2023
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Kumar, Arun (author), Kumar, Kanhaiya (author), Ali, Mohammad (author), Raj, Vivek (author), Srivastava, Abhinav (author), Kumar, Manishankar (author), Niraj, Pintoo Kumar (author), Kumar, Mukesh (author), Kumar, S. (author)The present study was carried out in the village Kaliprasad of Bhagalpur district of Bihar to know the arsenic exposure effect in the exposed population. A total of n = 102 households were studied, and their water and biological samples such as urine and hair were collected and analyzed in a graphite furnace atomic absorption...journal article 2023
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Wang, K. (author), Holm, P. E. (author), Trettenes, U. Brinkmann (author), Bandaru, S. R.S. (author), van Halem, D. (author), van Genuchten, C. M. (author)Iron (Fe)-based treatment methods are widely applied to remove carcinogenic arsenic (As) from drinking water, but generate toxic As-laden Fe (oxyhydr)oxide waste that has traditionally been ignored for resource recovery by the water sector. However, the European Commission recently classified As as a Critical Raw Material (CRM), thus...journal article 2023
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Annaduzzaman, M. (author), Rietveld, L.C. (author), Hoque, Bilqis Amin (author), van Halem, D. (author)Sequential iron (as Fe<sup>2+</sup>) 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 (PO<sub>4</sub><sup>3−</sup>) and silicate (SiO<sub>4</sub><sup>2−</sup>) during sequential Fe<sup>2+</sup>...journal article 2022
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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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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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van de Velde, Sebastiaan J. (author), Burdorf, Laurine D.W. (author), Hidalgo-Martinez, Silvia (author), Leermakers, Martine (author), Meysman, F.J.R. (author)Eutrophication and global change are increasing the occurrence of seasonal hypoxia (bottom-water oxygen concentration <63 μM) in coastal systems worldwide. In extreme cases, the bottom water can become completely anoxic, allowing sulfide to escape from the sediments and leading to the development of bottom-water euxinia. In seasonally...journal article 2022
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Kraaijeveld, Erik (author)The presence of high levels of arsenic in groundwater, an otherwise preferred drinking water source, urges the need for innovative and highly efficient (in terms of chemical use and energy consumption) technologies to remove arsenic during drinking water treatment. This research focussed on embedding iron electrocoagulation (Fe-EC) within a...master thesis 2021
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Kumar, S. (author), Ghosh, D. (author), Donselaar, M.E. (author), Burgers, F. (author), Ghosh, Ashok Kumar (author)Shallow aquifers in many Holocene alluvial basins around the world have in the last three decades been identified as arsenic pollution hotspots, in which the spatial variation of natural (or: geogenic) arsenic concentration is conditioned by the meandering-river geomorphology and the fluvial lithofacies distribution. Despite the large amount of...journal article 2021
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Annaduzzaman, M. (author), Rietveld, L.C. (author), Ghosh, D. (author), Hoque, Bilqis A. (author), van Halem, D. (author)Storage containers are usually used to provide a constant water head in decentralized, community groundwater treatment systems for the removal of iron (Fe) and arsenic (As). However, the commonly practiced aeration prior to storage assists in rapid and complete Fe<sup>2+</sup> oxidation, resulting in poor As removal, despite sufficient native...journal article 2021
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Roy, M. (author), van Genuchten, Case M. (author), Rietveld, L.C. (author), van Halem, D. (author)Arsenic (As) is a toxic element present in many (ground)water sources in the world. Most conventional As removal techniques require pre-oxidation of the neutral arsenite (As(III)) species to the negatively charged arsenate (As(V)) oxyanion to optimize As removal and minimize chemical use. In this work, a novel, continuous-flow As removal...journal article 2021
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Annaduzzaman, M. (author), Rietveld, L.C. (author), Amin Hoque, Bilqis (author), Bari, Md Niamul (author), van Halem, D. (author)Generally, abstracted groundwater is aerated, leading to iron (Fe<sup>2+</sup>) oxidation to Fe<sup>3+</sup> and precipitation as Fe<sup>3+</sup>-(hydr)oxide (HFO) flocs. This practice of passive groundwater treatment, however, is not considered a barrier for arsenic (As), as removal efficiencies vary widely (15–95%), depending on Fe/As ratio...journal article 2021
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Flambouris, Stelios (author)Arsenic in groundwater can constitute a persistent nuisance for water treatment facilities when it exceeds the admissible limit of 10 μg/L. Recently, a stricter limit has been set as a new challenging target by many companies in the Netherlands, which is below 1 μg/L. However, most of the groundwater treatment plants have been conventionally...student report 2020
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Abdelrady, Ahmed (author), Sharma, Saroj (author), Sefelnasr, Ahmed (author), Kennedy, M.D. (author)Bank filtration (BF) has been used for many years as an economical technique for providing high-quality drinking water. However, under anaerobic conditions, the aquifer release of undesirable metal(loid)s, such as iron manganese, and arsenic, reduces the bank filtrate quality and thus restricts the application of this technique. This study...journal article 2020
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Naus, Floris Loys (author), Schot, Paul (author), van Breukelen, B.M. (author), Ahmed, Kazi Matin (author), Griffioen, Jasper (author)In southwestern Bangladesh, clean drinking water is scarce, since rainwater is only available during the monsoon, pond water is often bacteriologically polluted, and groundwater may exhibit high salinity and arsenic levels. Managed aquifer recharge (MAR) might potentially provide safe drinking water by storing abundant freshwater from the wet...journal article 2020