Herman Van Langenhove

Herman Van Langenhove
Ghent University | UGhent · Department of Sustainable Organic Chemistry and Technology

About

427
Publications
120,733
Reads
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16,830
Citations
Citations since 2017
44 Research Items
7074 Citations
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201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
Additional affiliations
November 1980 - present
Ghent University
Position
  • Head of Department

Publications

Publications (427)
Article
N,N-Dimethylformamide (DMF) is an organic solvent produced in large quantities worldwide. It is considered as a hazardous air pollutant and its emission should be controlled. However, only a limited number of studies have been performed on the removal of gaseous DMF by biological technologies. In this paper, we evaluate the removal of DMF under mes...
Article
Secondary effluent from wastewater treatment plants contains (bio)recalcitrant trace organic contaminants (TrOCs) that are discharged into the environment. Ozonation can offer a solution for TrOCs removal from effluent and has been extensively investigated with respect to reaction mechanisms, performance and control strategies in view of full-scale...
Article
The biological removal of hydrophobic volatile organic compounds (VOCs) is limited by their low water solubility and, therefore, low bioavailability. The addition of surfactants is a promising strategy, but to gain understanding and broaden its applicability, its effect on the solubility of hydrophobic VOCs should be investigated. This study evalua...
Chapter
One of the groups of pollutants in the atmosphere is Polycyclic Aromatic Hydrocarbon (PAHs). PAHs compounds are currently extensively studied due to their harm to human and ecosystem health. Biomonitoring using plants was currently introduced as an alternative to monitoring pollutants through active air sampling to minimize the bias effect of the s...
Article
The ozone-activated peroxymonosulfate process (O3/PMS) has received increasing attention for the removal of trace organic contaminants (e.g. pesticides and pharmaceuticals) from water bodies. However, the ozone dosing strategy has not yet been properly investigated, especially in real water matrices. Typically, one-step dosing is applied in literat...
Article
Several analytical techniques, i.e. spectroscopic techniques as Near Infrared (NIR) and Mid-Infrared (MIR), Hyper Spectral Imaging (HSI), Gas Chromatography coupled to Mass Spectrometry (GC-MS) and Proton-transfer Reaction Time-of-Flight Mass spectrometry (PTR-TOF-MS), combined with chemometrics, are examined to evaluate their potential to solve di...
Article
The concentrations of 26 VOCs were measured in ten rural and ten urban households for two 7-day sampling campaigns in the Nsukka area, Southeast Nigeria, between 2017 and 2019. Samples were passively collected in the kitchen, living room, and outdoor using Tenax TA axial sorbent tubes. Analysis was done by thermal desorption gas chromatography coup...
Article
Groundwater constitutes a major source of fresh water globally. However, it faces serious quality challenges from both conventional pollutants and contaminants of emerging concern (CECs) such as pharmaceutically active compounds (PhACs), personal care products (PCPs) and pesticides. There exists a significant knowledge gap regarding the occurrence...
Article
In the recent years, Metal-Organic Frameworks (MOFs) emerged at a high and increasing pace and have been widely studied in the frame of applications such as gas storage, mixtures separation and heterogeneous catalysis. Nevertheless, the study of Volatile Organic Compounds (VOCs) adsorption on Metal-Organic Frameworks (MOFs) is still lagging behind...
Article
The ozone-activated peroxymonosulfate process (O3/PMS) is an emerging advanced oxidation process for the removal of trace organic contaminants (TrOCs) in water, because it produces both hydroxyl and sulfate radicals. Its potential has been shown in distilled water, but limited research has been performed in real (waste)waters. Therefore, this work...
Article
Full-text available
The number of studies dealing with tertiary ozonation to remove trace organic contaminants (TrOCs) in effluents originating from wastewater treatment plants (WWTPs) is increasing due to the need for upgrading the WWTPs overall performance. To follow-up TrOCs removal in real-time during ozone-based treatment, online surrogate measurements are necess...
Article
The use of biological reactors to remove volatile organic compounds (VOCs) from waste gas streams has proven to be a cost-effective and sustainable technique. However, hydrophobic VOCs exhibit low removal, mainly due to their limited bioavailability for the microorganisms. Different strategies to enhance their removal in bio(trickling)filters have...
Article
A promising concept for sampling contaminants of emerging concern (CECs) using a home-made Simple Teabag Equilibrium Passive Sampler (STEPS) containing hydrophilic divinylbenzene (h–DVB) sorbent is presented and evaluated for application in estuarine systems. The uptake of a multi-class mixture of CECs with a broad polarity range (Log P ranging fro...
Article
The concentrations of nitrogen dioxide (NO2), sulfur dioxide (SO2) and ozone (O3) were determined at 20 locations (10 urban and 10 rural) in both indoor (cooking areas) and ambient air in the Nsukka area during two one-week sampling periods in both dry (11–January 26, 2019) and wet (11–August 22, 2017) seasons. During the dry season, the pollutants...
Article
In spite of the global outcry for urgent action against air pollution, most African countries lack functional air quality monitoring stations and data there from; making air quality management difficult. Therefore, stand-alone studies are reviewed to provide information on air pollutant levels, sources, spatial and seasonal variation across the con...
Article
Full-text available
Rhizospheric microorganisms can alter plant physiology and morphology in many different ways including through the emission of volatile organic compounds (VOCs). Here we demonstrate that VOCs from beneficial root endophytic Serendipita spp. are able to improve the performance of in vitro grown Arabidopsis seedlings, with an up to 9.3-fold increase...
Article
The use of Fusarium solani fungi in an expanded perlite packed biofilter was investigated for the treatment of a hexane polluted waste gas stream using selected ion flow tube mass spectrometry (SIFT-MS). The latter analytical technique proved to be of utmost importance to evaluate the performance of the biofilter at high time resolution (seconds) u...
Article
Awareness about the rising detection and reported (eco)toxicological effects of contaminants of emerging concern (CECs, e.g. pharmaceuticals and personal care products – PPCPs – and modern pesticides) in the aquatic environment is growing. CECs are increasingly reported in the African aquatic environment, although the amount of data available is st...
Conference Paper
Household air pollution is a leading cause of death in low and middle-income countries due to the reliance on poor quality fuels and technologies for cooking and lighting. To address these challenges, various programs encouraging households to embrace improved cook stoves (Save80, Stovetec and EcoZoom) and cleaner fuels such as LPG, biogas and etha...
Article
Knowledge about the occurrence of emerging organic micropollutants in the marine environment is still very limited, especially when focusing on the Belgian Part of the North Sea (BPNS). This study therefore optimized and validated a Speedisk® based SPE and LC-Q-Orbitrap HRMS method to tackle the challenge of measuring the expected ultra-trace conce...
Article
Partial pit ventilation is a strategy to concentrate a large part of the air pollutants from pig houses in a small part of the ventilation air that can be treated by an air cleaner. In this study, the effect of partial pit ventilation on odorant emissions from two experimental pig houses (32 pigs in each) with two different ventilation inlet system...
Article
Full-text available
An analytical method was developed for the trace quantification of oxygenated polycyclic aromatic hydrocarbons (oxyPAHs) in mussels. Compounds included were naphthalene-1-ol, 9H-fluoren-9-one, anthracene-9,10-dione, 7H-benz[de]anthracene-7-one, naphtacene-5,12-dione, and benzo[a]anthracene-7,12-dione. Pyrene-1-carboxaldehyde was applied as an inter...
Article
Plasticizers and other plastics additives have been extensively used as ingredients of plastics and are as a result thereof easily released in the aquatic environment, due to different physical diffusion processes. In this context, a dedicated method was developed for the simultaneous quantification of 27 known and a virtually unlimited number of u...
Article
During secondary effluent ozonation, real-time control of the ozone dose based on the water quality is essential to minimize operational costs and by-product formation (i.e. two of the main hurdles hindering a fast implementation of the technology). In this pilot-scale study, the ozone dose was controlled via online UV absorbance (UVA254) measureme...
Article
Given the need for innovations in advanced oxidation processes to deal with challenges such as [rad]OH scavenging, this paper addresses the removal of pharmaceuticals with a large variety in ozone reactivity (kO3 = 0.15–3 × 10⁵ M⁻¹s⁻¹) by use of the novel ozone-activated peroxymonosulfate (O3/PMS) process. A clear improvement in removal efficiency...
Article
Full-text available
Phytohormones are signaling and regulating metabolites involved in numerous plant processes, including growth, development, and responses to stress. Currently, the focus is on the analysis of multiple phytohormones in order to characterize crosstalk and hormone signaling networks. In this paper, representative phytohormones of the major classes are...
Article
Full-text available
A methodology was developed to measure volatile organic compounds (VOCs) in a non-destructive way inside modified atmosphere packaged (MAP) poultry (chicken fillets) samples stored at 4 °C. To achieve this, a solid-phase microextraction (SPME) fiber was inserted in the headspace of the package and was later desorbed within a heated injector coupled...
Article
Full-text available
The mass transfer of volatile organic compounds (VOCs) from waste gas streams towards liquid in scrubbers is determined by the overall volumetric mass transfer coefficient (Kga), which is dependent on the air-to-water partition coefficient (KAW, dimensionless). The application of additives in the water phase can alter this KAW towards lower values...
Article
Full-text available
BACKGROUND Biofiltration is a technique to remove volatile organic compounds (VOCs) from waste gas streams. It can be regarded as a sustainable treatment technology with low operational costs and good performance. The treatment of hydrophobic compounds is however difficult, due to the low mass transfer towards the water phase on top of the biofilm...
Article
New robust correlation models for ozonation, based on UVA254 and fluorescence surrogate parameters and developed considering kinetic information, have been applied at pilot-scale. This model framework is validated with the aim for operators to control the ozone dose for the removal of trace organic contaminants (TrOCs) in effluents from full-scale...
Article
New robust correlation models for real-time monitoring and control of trace organic contaminant (TrOC) removal by ozonation are presented, based on UVA254 and fluorescence surrogates, and developed considering kinetic information. The abatement patterns of TrOCs had inflected shapes, controlled by the reactivity of TrOCs towards ozone and HO radic...
Article
Full-text available
Air scrubbers are commonly used as treatment techniques for industrial waste gases containing volatile organic compounds (VOCs). Mass transfer of hydrophobic compounds to liquid can be increased using water soluble additives in the scrubbing liquid or applying water-miscible or immiscible solvents. The design of air scrubbers requires reliable part...
Article
Full-text available
Rationale Malignant pleural mesothelioma (MPM) is mainly caused by previous exposure to asbestos fibers and has a poor prognosis. Due to a long latency period between exposure and diagnosis, MPM incidence is expected to peak between 2020-2025. Screening of asbestos-exposed individuals is believed to improve early detection and hence, MPM management...
Article
Full-text available
Dynamic olfactometry, according to the standard EN 13725:2003 (CEN, 2003), is the reference method in Europe to measure odour concentrations and emissions from agricultural and industrial facilities. Laboratory measures to improve the precision (repeatability) of olfactometry were investigated here, focussing on the reference odorant, n-butanol and...
Article
The lack of adequate strategies for monitoring endocrine disrupting compounds (EDCs) in the aquatic environment is emphasized in the European Water Framework Directive. In this context, a new UHPLC-HR-Q-Orbirtrap-MS multi-residue method was developed for the simultaneous measurement of 70 steroidal EDCs in two aquatic matrices, i.e. sea and fresh w...
Article
Introduction Early detection of malignant pleural mesothelioma (MPM) is likely to improve outcome in affected patients. From our previous studies (MesoBreath 1 & 2) we developed a screening tool in which volatile organic compounds (VOCs) in breath allowed discrimination of MPM patients from at risk controls. However it is not yet clear which VOCs a...
Poster
Full-text available
In March 2016 we deployed Speedisk™ passive samplers in the harbor of Zeebrugge (Belgium) and in the sea 5 km in front of this harbor. While passive samplers are usually mainly used for chemical analysis we aimed to combine both chemical analysis and biological effect assessment of the mixtures present on the samplers. To this end, passive sampler...
Poster
The presence and long-term exposure of the aquatic environment to pharmaceuticals, pesticides and personal care products has awakened a growing concern amongst environmental policy makers and researchers. As many of these micropollutants are ubiquitously distributed, many researchers have focused on their occurrence in different matrices such as gr...
Article
Ozonation and three (biological) filtration techniques (trickling filtration (TF), slow sand filtration (SSF) and biological activated carbon (BAC) filtration) have been evaluated in different combinations as tertiary treatment for municipal wastewater effluent. The removal of 18 multi-class pharmaceuticals, as model trace organic contaminants (TrO...
Article
An analytical method was developed and optimized for the quantification of 16 polycyclic aromatic hydrocarbons (PAHs) and 12 oxygenated PAHs in Taxus baccata leaves. Emphasis was given to the development of an in-cell cleanup step using pressurized solvent extraction, a cleanup step using solid-phase extraction, and the instrumental analysis by GC-...
Conference Paper
Background Malignant pleural mesothelioma (MPM) is an asbestos-related tumour with poor prognosis. It is thought that only an early diagnosis will improve patient's outcome. Breathomics allows to detect breath volatile organic compounds (VOCs) which can be used as non-invasive markers for disease. Aim To identify VOCs in breath with gas chromatogr...
Conference Paper
Full-text available
The extensive use of organic chemicals for different applications (industry, agriculture, pharmaceutical usage, etc.) leads to low-concentration but long-term exposure of the aquatic environment to their residues. The protection of our coasts and marine waters is a long-standing part of the European Community environmental policy, which is also bro...
Poster
Full-text available
The extensive use of organic chemicals for different applications (industry, pharmaceutical usage, etc.) leads to low-concentration but long-term exposure of the aquatic environment to their residues. The protection of our coasts and marine waters are a long-standing part of the European Community environmental policy, which is also internationally...
Article
Biofilters are suitable to treat industrial emissions polluted with volatile organic compounds. This study investigates the selected ion flow tube mass spectrometer (SIFT-MS) as a new and fast analysis apparatus to determine the performance, the biokinetic parameters and the external porosity of a biofilter. The SIFT-MS was also used to obtain more...
Article
Olfactometry using n-butanol as a reference gas, is widely used in Europe to assess odour concentrations and emissions from all types of odour sources using the standard EN 13725:2003. Literature indicates a large variability on olfactometric measurement results and questions are rising regarding the use of n-butanol as a reference gas for agricult...
Article
Dimethyl sulphide (DMS), n-hexane and toluene removal from a waste air was carried out by a two phase partitioning bioreactor (TPPR) containing a 25/75 vol/vol silicone oil/water emulsion inoculated with activated sludge under continuous feeding conditions. The performance of the reactor was determined using two different measuring techniques, GC-F...
Article
Full-text available
Description of the subject. This research note discusses the results of measurements of particulate matter concentrations inside a pig fattening facility. Objectives. The objectives of the present study were to investigate the correlations between the different size fractions of indoor particulate matter (PM) inside a pig fattening facility and to...
Article
Full-text available
Determining ammonia emission factors (EF) for fattening pig facilities is important from both a regulatory and a research point of view. However, measurements to determine an EF can be time consuming and costly. Several reduced sampling strategies were developed in the past to reduce the costs and measuring time, by taking into account parameters t...
Article
Odour quantification is generally performed by olfactometry, a technique which determines to what extent an odorous air sample should be diluted with odour-free air to be just distinguishable from odour-free air. In this study, the performance of two field olfactometers (Nasal Ranger and Scentroid 110c) was evaluated with respect to their ability t...
Article
The bumblebee Bombus terrestris is a general pollinator in Europe and also highly suitable as greenhouse pollinator of various agricultural and horticultural crops such as tomato, sweet pepper or strawberry. Here, we highlight the importance of volatile emissions for the attractiveness and pollination efficiency of strawberry varieties, starting fr...
Article
Intensive agriculture emits air pollutants such as inorganic gases, volatile organic compounds (VOC) and airborne particulate matter. The public can suffer from severe odour nuisance caused by these emissions, particularly in areas with high population densities. Odorous compounds are not only present in the free gas phase but undergo a partitionin...
Article
The spectrum of identified organic trace compounds in the aquatic environment is most probably only “the tip of the iceberg”. Modern liquid chromatography coupled to time-of-flight and Orbitrap high-resolution mass spectrometry (HRMS) promise to extend knowledge on the environmental occurrence and fate of (un)known micropollutants. Thanks to its un...
Article
This study evaluated the effect of feed form and grinding intensity of the pig diet and the interaction between both on the particulate matter (PM) concentrations inside a pig nursery and the growth performances of weanling pigs. Four diets were compared: finely ground meal, coarsely ground meal, finely ground pellets, and coarsely ground pellets....
Article
Modern high-resolution mass spectrometry (HRMS) enables full-spectrum trace level analysis of emerging environmental organic contaminants. This raises the opportunity for post-acquisition suspect screening when no reference standards are a priori available. When setting up a conventional screening identification train based on successively differen...
Article
Full-text available
This study evaluated the effect of feed form and grinding intensity of the pig diet and the interaction between both on the particulate matter (PM) concentrations inside a pig nursery and the growth performances of weanling pigs. Four diets were compared: finely ground meal, coarsely ground meal, finely ground pellets, and coarsely ground pellets....
Chapter
Water is the most essential element to life on Earth. However, the availability and quality of the global water resources are at risk because many stressors of human origin are putting pressure on it. The contamination of water bodies (lakes, rivers, aquifers and oceans) occurs when man-made chemicals are directly or indirectly discharged into wate...
Article
Full-text available
This study is a comparative study between a flat sheet composite membrane bioreactor (MBR) and a new type of MBR, the two phase partitioning membrane bioreactor (TPPMB) to examine the merits of using silicone oil to improve the mass transfer in a membrane type bioreactor. Dimethyl sulphide (DMS), n-hexane and toluene removal from a waste air was ca...
Conference Paper
Full-text available
Online monitoring of odorous compounds in the ventilation air was applied in an experimental pig house in Denmark. The measurements were executed by proton-transfer-reaction – mass spectrometry (PTR-MS) while grab samples are used to confirm the identity of the compounds. Sorbent tubes samples were analysed by gas chromatography – mass spectrome...
Article
Full-text available
The aim of this review paper is to provide a comprehensive overview of different chemical and environmental aspects concerning fluoroquinolone antibiotics as emerging contaminants. A literature survey has been performed based on 204 papers from 1998 to mid-2013, resulting in a dataset consisting out of 4100 data points related to physical-chemical...
Article
Full-text available
The main objective of the study was to assess particulate matter (PM) exposure levels for both the farmer and the veterinarian during different operational tasks in pig-fattening houses, and to estimate their exposure levels on a daily working basis (time-weighted average (TWA)). The measured PM fractions were: inhalable and respirable PM, PM10, PM...
Article
The increasing trend of promoting public transportation (bus tram, metro, train) and more environmental friendly and sustainable non fossil-fuel alternatives (walking, cycling etc) as substitutes for auto vehicles brings forward new questions with regard to pollutant levels to which commuters are exposed. In this study, three transportation modes (...