Sarka Langer

Sarka Langer
IVL Swedish Environmental Research Institute · Climate & Sustanaible Cities

Doctor of Philosophy

About

106
Publications
15,484
Reads
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2,667
Citations
Additional affiliations
September 2016 - August 2019
Chalmers University of Technology
Position
  • Professor
Description
  • Adjunct professor, Division of Building Servides Engineering
September 2010 - April 2025
IVL Swedish Environmental Research Institute
Position
  • Senior Researcher

Publications

Publications (106)
Article
Full-text available
Assessment of indoor environmental quality has recently moved to a combined methodology of both measurements and questionnaire surveys. In this study, we have used data from the national survey of the Swedish housing stock, BETSI, conducted in 2007/2008, during the heating season. The study included, among others, measurement of selected indoor air...
Article
Nanocluster aerosols (NCAs, particles <3 nm) are important players in driving climate feedbacks and processes that impact human health. This study reports, for the first time, NCA formation when gas-phase ozone reacts with human surfaces. In an occupied climate-controlled chamber, we detected NCA only when ozone was present. NCA emissions were depe...
Article
Air pollutant exposure in workplace environments has been associated with health and cognitive outcomes of workers. While green building certification programs have been instrumental in promoting indoor air quality (IAQ), the present literature indicates inconsistent evidence. Recent emergence and proliferation of WELL certification program that pr...
Article
Full-text available
People influence indoor air chemistry through their chemical emissions via breath and skin. Previous studies showed that direct measurement of total OH reactivity of human emissions matched that calculated from parallel measurements of volatile organic compounds (VOCs) from breath, skin, and the whole body. In this study, we determined, with direct...
Article
Residential indoor climate is a key factor for occupant comfort, health and wellbeing, while also affecting the buildings' energy demand. A strong focus has been traditionally placed on low winter indoor temperatures in dwellings due to their considerable health impacts. However, there is a trend towards high and stable indoor temperatures, which a...
Article
Data from a nationwide survey on the status of the Swedish residential building stock and indoor air quality was placed in the public domain by the National Board of Housing, Building and Planning of Sweden. The current research investigates the indoor humidity conditions in Swedish residential buildings, single-family houses and apartments, assess...
Article
Young children spend a substantial part of their waking time in preschools. It is therefore important to reduce the load of hazardous semivolatile organic compounds (SVOCs) in the preschools’ indoor environment. The presence and levels of five SVOC groups were evaluated (1) in a newly built preschool, (2) before and after renovation of a preschool,...
Article
Full-text available
Over the last decades, strong focus has been placed on the energy efficiency of buildings; not least school buildings. Energy performance (EP) of buildings is nowadays in principle described by one single indicator based on purchased energy in kWh/year.m ² . Another important building performance aspect is the indoor environmental quality. This stu...
Article
Full-text available
Environmental considerations, concerning the negative impacts of ship exhaust gases and particles on ambient air quality, are behind the requirements of cleaner marine fuels currently applied in designated emission control areas (ECAs). We investigated the impact of a ship operating on two types of fuel on the indoor air quality onboard. Gaseous an...
Article
With the gradual reduction of emissions from building products, emissions from human occupants become more dominant indoors. The impact of human emissions on indoor air quality is inadequately understood. The aim of the Indoor Chemical Human Emissions and Reactivity (ICHEAR) project was to examine the impact on indoor air chemistry of whole‐body, e...
Article
Full-text available
The aim of this study was to test the usefulness of polyurethane foam (PUF) passive air samplers as stationary, and, for the first time, as personal samplers for one week’s sampling period of polycyclic aromatic hydrocarbons (PAHs) in occupational air. Routine monitoring of workplace exposure is commonly performed with active sampling. However, act...
Article
Full-text available
This paper deals with temporary discomfort caused by characteristic odours from new objects and materials in office buildings. Earlier investigations have shown that increased ventilation rates in residential buildings decrease the indoor concentrations of non-occupant-related indoor air pollutants such as aldehydes and total volatile organic compo...
Article
Full-text available
Consumer goods and building materials present in the preschool environment can be important sources of hazardous chemicals, such as plasticizers, bisphenols, organophosphorus and brominated flame retardants, poly- and perfluoroalkyl substances, which may pose a health risk to children. Even though exposure occurs via many different pathways, such a...
Article
Full-text available
This study aimed to better understand and quantify the influence of ventilation strategies on occupant‐related indoor air chemistry. The oxidation of human skin oil constituents was studied in a continuously‐ventilated climate chamber at two air exchange rates (1 h−1 and 3 h−1) and two initial ozone mixing ratios (30 ppb and 60 ppb). Additional mea...
Chapter
Everyday thermal environments affect people’s comfort and wellbeing, with extreme conditions affecting human health. A strong focus on avoiding the extremes along with the introduction of tight thermal comfort criteria over the years has led to design strategies and behaviors that promote thermally stable indoor environments. However, recent resear...
Conference Paper
Full-text available
The aim of this study was to compare the indoor air quality in newly built energy-efficient (passive) buildings in Sweden with the Swedish residential housing stock and new conventional buildings. We have used data from our previous publications to calculate Indoor Environmental Index (IEI), which is an average of Indoor Discomfort Index (IDI) that...
Technical Report
Full-text available
The purpose of the project presented in this report was to map the personal exposure of the toxic substances benzene, nitrogen dioxide (NO2) and polycyclic aromatic hydrocarbons (PAH), all of which can be traced to the marine fuel and/or diesel exhaust emissions. The measured exposure has been analysed to identify any differences in exposure betwe...
Article
Full-text available
Osirys is a European Research Project where a holistic solution for façades and interior partitions ready to be applied in building retrofitting and new construction has been developed. The project uses biocomposites as the base material to define different products: a multilayer façade, a curtain wall, a window, and an interior partition. The bioc...
Article
Buildings are responsible for a substantial portion of the global energy consumption. Most of the multifamily residential buildings built in the 20th century in Central and Eastern Europe do not satisfy the current requirements on energy efficiency. Nationwide measures taken to improve the energy efficiency of these buildings rarely consider their...
Article
Perception of indoor air quality (PIAQ) was evaluated in a nationwide survey of 567 French dwellings, and this survey was combined with measurements of gaseous and particulate matter (PM10 and PM2.5 ) indoor air pollutants and indoor climate parameters. The perception was assessed on a nine-grade scale by both the occupants of the dwellings and the...
Article
Despite the distance from large anthropogenic emission sources, toxic mercury is transported via the atmosphere and oceans to the Southern Ocean. Seawater samples were collected at selected stations and were analysed for total mercury (HgT) (8 stations), dissolved gaseous mercury (DGM) (62 stations) and methylmercury (12 stations) during winter (We...
Conference Paper
Buildings are responsible for a substantial portion of global energy consumption. Most of the multifamily residential buildings in central Europe built in the 20th century do not satisfy the current requirements on energy efficiency. Nationwide remedial measures are taken to improve the energy efficiency of these buildings and reduce their energy c...
Article
Full-text available
Limited studies have been conducted on mercury concentrations in the polar cryosphere and the factors affecting the distribution of mercury within sea ice and snow are poorly understood. Here we present the first comprehensive seasonal study of elemental and total mercury concentrations in the Antarctic sea ice environment covering data from measur...
Article
For the first time elemental mercury in air and surface seawater was measured continuously in the remote seas of western Antarctica. A major contributor to atmospheric emissions of the toxic and globally dispersed pollutant mercury is the re-evasion from water surfaces, due to a supersaturation of dissolved gaseous mercury (DGM) in surface water. I...
Article
Full-text available
Mercury (Hg) is a worldwide contaminant that can cause adverse health effects to wildlife and humans. While atmospheric modeling traces the link from emissions to deposition of Hg onto environmental surfaces, large uncertainties arise from our incomplete understanding of atmospheric processes (oxidation pathways, deposition, and re-emission). Atmos...
Conference Paper
Full-text available
The purpose of this study is to examine crew members’ personal exposure and perceived air quality on board a Swedish passenger ferry before and after a change of fuel type. Personal exposure was measured in the breathing zone of 20 crew members and quantified in terms of concentrations of nitrogen dioxide (NO2) and total volatile organic compounds...
Conference Paper
This study intends to investigate how a change of fuel type from Heavy Fuel Oil to ultra-low sulphur hybrid oil affects the indoor air quality on board a passenger ferry. The indoor air quality was assessed with respect to the concentration of NO2, SO2 and TVOC, temperature and relative humidity. The efficiency of the ventilation system on the ferr...
Article
Organophosphates are used in a wide range of materials and consumer products and are ubiquitous in indoor environments. Certain organophosphates have been associated with various adverse health effects. The present paper reports mass fractions of organophosphates in dust samples collected from 500 bedrooms and 151 daycare centers of children living...
Article
Full-text available
Mercury (Hg) is a worldwide contaminant that can cause adverse health effects to wildlife and humans. While atmospheric modeling traces the link from emissions to deposition of Hg onto environmental surfaces, large uncertainties arise from our incomplete understanding of atmospheric processes (oxidation pathways, deposition, and reemission). Atmosp...
Article
A national survey on indoor environmental quality covering 567 residences in mainland France was performed during 2003-2005. The measured parameters were temperature, relative humidity, CO2, and the indoor air pollutants: fourteen individual volatile organic compounds (VOC), four aldehydes and particulate matter PM10 and PM2.5. The measured indoor...
Technical Report
Full-text available
An indoor environment on-board ship is important for the crew’s well-being, healt and work efficiency . Indoor air quality and thermal comfort are important aspects of the environment which have not been studied extensively on vessels. On long trips that last for weeks or even months and that may pass through several climatic zones there is no way...
Article
The indoor environment was evaluated in 20 new passive houses and 21 new conventionally built houses during the 2012/2013 and 2013/2014 heating seasons. Temperature, relative humidity (RH), the concentrations of NO2, ozone, formaldehyde, volatile organic compounds (VOC) and viable microbiological flora were measured. Air exchange rates (AER) were e...
Conference Paper
Full-text available
The indoor air quality (IAQ) on-board the Swedish icebreaker Oden was examined during two field campaigns, in winter and in summer 2013. The measured parameters were temperature, relative humidity, air exchange rate and concentration of CO, CO2, NO, NO2, ozone, SO2, volatile organic compounds (VOC), formaldehyde, PAH, PM10, PM2.5 and submicron and...
Article
Gas phase advanced oxidation, a new method for pollution control building on the photo-oxidation and particle formation chemistry occurring in the atmosphere, is introduced and characterized. The process uses ozone and UV-C light to produce in situ radicals to oxidize pollution, generating particles that are removed by a filter; ozone is removed us...
Article
Full-text available
Particle mass and number concentrations were measured in a mechanically ventilated classroom as part of a study of ventilation strategies for energy conservation. The ventilation system was operated either continuously, intermittently or shut down during nights while it was on during workdays. It appears that the nighttime ventilation scheme is not...
Article
Full-text available
The purpose of this study was to evaluate the indoor air quality (IAQ) in newly built low energy houses. Measurements were performed in 22 passive houses and 21 conventional buildings during 2012-2013 and 2013-2014 heating seasons. The measured parameters were temperature, relative humidity, concentration of CO2, NO2, formaldehyde, volatile organic...
Article
Ozone concentrations were measured in a classroom with and without occupants, with the purpose to quantify effects on indoor O3 concentrations. The teacher and 24 11-year old pupils each removed O3 at a rate, first order in O3, corresponding to a rate constant of (2.5 ± 0.6) × 10-5 s-1 in the present locality and to a deposition velocity of 0.45 cm...
Article
Data from a recent Swedish survey on the status of the housing stock and indoor air quality were placed in the public domain by the Swedish National Board of Housing, Building and Planning in 2011. The available parameters included the year of construction, dwelling location, type of ventilation system, temperature, relative humidity, air exchange...
Article
Indoor air measurements were conducted in one unoccupied apartment of a 'near-zero-energy' residential building with a unique, wooden construction. Ozone, NO2, fine particles and volatile organic compounds, formaldehyde, acetaldehyde and peroxyacetyl nitrate (PAN) were measured under 'as is' conditions and after intentional intervention by adding o...
Article
Full-text available
Neither the European standard nor the US standard for classification of intermediate class filters comprises testing of filter performance with respect to ultrafine particles (UFPs) or particles of the most penetrating size (MPPS). This could turn out to be a major lack in classification standards since UFPs have been pointed out as a serious healt...
Article
Full-text available
Total daily intakes of diethyl phthalate (DEP), di(n-butyl) phthalate (DnBP), di(isobutyl) phthalate (DiBP), butyl benzyl phthalate (BBzP) and di(2-ethylhexyl) phthalate (DEHP) were calculated from phthalate metabolite levels measured in the urine of 431 Danish children between 3 and 6 years of age. For each child the intake attributable to exposur...
Data
Mass-fractions (µg/g) of phthalates in dust samples collected from homes and daycare centers and concentrations (ng/mL) of the phthalate metabolites in urine samples. (DOCX)
Data
Cumulative frequency distributions of total phthalate intakes. Distributions are shown for total intakes calculated from the metabolite concentrations measured in urine (DIurine) and estimated from the children’s exposure to phthalates in the indoor environment (sum of dust ingestion, inhalation and dermal absorption). The latter is depicted both a...
Data
Further discussion on relevant issues. A. Discussion on the daily phthalate intakes estimated indirectly from models based on phthalate levels in various media, B. Discussion on potential bias resulting from the case-base selection of the study population, C. Discussion on the intake from dermal absorption from dust adhered to skin. (DOCX)
Data
Contribution (%) of the home and daycare environments to the weekly intake from each pathway and to the total weekly intake ( WIindoors ). (DOCX)
Data
Daily phthalate intakes (µg/d/kg-bw) of children estimated indirectly from exposure to various media (food, air, water, soil, dust). (DOCX)
Article
Around the world humans use products that contain phthalates, and human exposure to certain of these phthalates has been associated with various adverse health effects. The aim of the present study has been to determine the concentrations of the metabolites of diethyl phthalate (DEP), di(n-butyl) phthalate (DnBP), di(iso-butyl) phthalate (DiBP), bu...
Article
Phthalate esters are among the most ubiquitous of indoor pollutants and have been associated with various adverse health effects. In the present study we assessed the cross-sectional association between eight different phthalate metabolites in urine and allergic disease in young children. As part of the Danish Indoor Environment and Children's Heal...
Technical Report
Full-text available
Projektets bas är en inventering av 24 kyrkor som ett representativt urval från 12 av Sveriges 13 stift. Inventeringen omfattar; luftkvalitetsmätningar, inventering av mögelförekomst, samt beskrivning av mikroklimatnischer, byggteknik och användning (brukarmönster). Resultatet av inventeringen utgör en egenskapsprofil per kyrka som sedan sätts i re...
Article
Wooden building products indoors are known to be able to affect the perceived air quality depending on their emission strength. The indoor application of modern ecological lacquer systems (eco-lacquers or ‘green’ lacquers) may be a much stronger source than the substrates itself. Especially with regard to the formation of ultrafine particles by gas...
Article
Unlabelled: The principle objective of the Danish research program 'Indoor Environment and Children's Health' (IECH) was to explore associations between various exposures that children experience in their indoor environments (specifically their homes and daycare centers) and their well-being and health. The targeted health endpoints were allergy,...
Article
Given the rate at which humans shed their skin (desquamation), skin flakes that contain squalene and cholesterol are anticipated to be major constituents of indoor dust. These compounds have been detected in more than 97% of the dust samples collected from 500 bedrooms and 151 daycare centers of young children living in Odense, Denmark. The mass fr...
Article
Twenty-three new filter samples, including three different medium types, were tested in a small scale testrig using a Scanning Mobility Particle Sizer (SMPS). The filtration efficiencies for ultrafine particles (UFPs) and particles of the most penetrating particle size (MPPS) were determined. The filters were of class F5-F9 according to the Europea...
Article
Rate coefficients for the reaction of NO3 with methyl formate, methyl acetate, methyl propionate, methyl butyrate, ethyl formate. ethyl acetate. ethyl propionate. propyl formate, propyl acetate and n-hexane have been determined at 296 +/- 2 K. The rate coefficients, which should strictly be interpreted as upper limits, were found to be 0.36 +/- 0.0...
Article
As part of the Danish Indoor Environment and Children’s Health (IECH) study, dust samples were collected from 500 bedrooms and 151 daycare centers of children (ages 3 to 5) living on the island of Fyn. The present paper reports results from the analyses of these samples for five phthalate esters (diethyl phthalate (DEP), di(n-butyl) phthalate (DnBP...
Article
Acetic and formic acid vapors emitted from woodwork in historical organs are very important corrosive agents for lead pipes. These acids are slowly released from the wood both during playing and when the pipes are silent. To inhibit this emission process. the wood surface can be modified, by creating a protective layer with alkaline features. Howev...
Article
Formation of ultrafine particles, d p o100 nm, from gas-phase reaction of limonene with O 3 was studied. The concentration of reactants was chosen as close to realistic indoor conditions as possible. Two reaction chambers (1 and 14 m 3) were used. Particle number concentrations were measured using a CPC and size distributions by using a scanning mo...
Article
The atmospheric environment inside and outside historical organs in several European regions is reported. In each region, comparisons were made between an instrument suffering organ pipe corrosion and an organ without reported corrosion problems. Concentrations of acetic acid (ethanoic acid), formic acid (methanoic acid), acetaldehyde (ethanal), fo...
Book
Full-text available
This report summarises the state of the art concerning ozone-initiated chemistry and its impact on indoor air quality and human health and recommends prioritised research goals for the future. The focus is on terpenes (e.g., limonene, α-pinene) for reasons of high chemical reactivity and abundance.
Article
The aim of this study was to analyze the residual monomer content of photopolymerized dendritic methacrylate copolymers and particulate filler composites. Headspace-gas chromatography/mass spectrometry (HS-GC/MS) was compared with high performance liquid chromatography (HPLC). The resin mixtures consisted of a dendritic methacrylate monomer, methyl...