The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Kurunthachalam Kannan - One of the best experts on this subject based on the ideXlab platform.
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cyclic and linear Siloxanes in indoor air from several northern cities in vietnam levels spatial distribution and human exposure
Chemosphere, 2017Co-Authors: Tri Manh Tran, Tu Binh Minh, Giang Huong Minh Dang, Kurunthachalam KannanAbstract:Abstract Earlier studies have reported the occurrence of cyclic and linear Siloxanes in personal care and household products. Nevertheless, there is a lack of information on the occurrence of Siloxanes in indoor air. In this study, four cyclic and six linear Siloxanes were measured in 97 indoor air samples collected from various micro-environments in four cities in northern, Vietnam, during September 2016 to January 2017. The total concentrations of Siloxanes (TSi) in particulate and gas phases ranged from 141 to 7220 μg g −1 (mean: 1880) and 23.8–1580 ng m −3 (mean: 321), respectively. The total concentrations of cyclic Siloxanes (TCSi), linear Siloxanes (TLSi), and TSi in indoor air were 1.91–1500 ng m −3 , 21.8–817 ng m −3 , and 41.8–1950 ng m −3 , respectively. The highest mean concentration of Siloxanes was found in indoor air from hair salons in Hanoi. The concentrations of Siloxanes in air collected from homes in Hanoi were higher than those from other smaller cities such as Bacninh, Thaibinh, and Tuyenquang. The human exposures to Siloxanes through inhalation were estimated for various age groups based on the measured concentrations. The mean inhalation exposure doses to total Siloxanes for infants, toddlers, children, teenagers, and adults were 352, 219, 188, 132, and 95.9 ng kg-bw −1 d −1 , respectively.
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occurrence of cyclic and linear Siloxanes in indoor air from albany new york usa and its implications for inhalation exposure
Science of The Total Environment, 2015Co-Authors: Tri Manh Tran, Kurunthachalam KannanAbstract:Cyclic and linear Siloxanes are used in a wide variety of household and consumer products. Nevertheless, very few studies have reported the occurrence of these compounds in indoor air or inhalation exposure to these compounds. In this study, five cyclic (D3-D7) and nine linear Siloxanes (L3-L11) were determined in 60 indoor air samples collected in Albany, New York, USA. The mean concentrations of individual Siloxanes in particulate and vapor phases ranged from <12 μg g(-1) (for octamethyltrisiloxane [L3], decamethyltetrasiloxane [L4]) to 2420 μg g(-1) (for decamethylcyclopentasiloxane [D5]) and from 1.05 ng m(-3) to 543 ng m(-3), respectively. The mean concentrations of individual Siloxanes in combined particulate and vapor phases of bulk indoor air ranged from 1.41 ng m(-3) (for L4) to 721 ng m(-3) (for D5). Cyclic Siloxanes hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), D5, dodecamethylcyclohexasiloxane (D6), and octadecamethylcycloheptasiloxane (D7) were found in all indoor air samples. The mean concentrations of total Siloxanes (i.e., sum of cyclic and linear Siloxanes) ranged from 249 ng m(-3) in laboratories to 6210 ng m(-3) in salons, with an overall mean concentration of 1470 ng m(-3) in bulk indoor air samples. The calculated mean daily inhalation exposure doses of total Siloxanes (sum of 14 Siloxanes) for infants, toddlers, children, teenagers, and adults were 3.18, 1.59, 0.76, 0.34, and 0.27 μg/kg-bw/day, respectively.
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a nationwide survey and emission estimates of cyclic and linear Siloxanes through sludge from wastewater treatment plants in korea
Science of The Total Environment, 2014Co-Authors: Sunggyu Lee, Kurunthachalam Kannan, Hyobang Moon, Geumju Song, Wonchan LeeAbstract:Abstract Siloxanes are widely used in various industrial applications as well as in personal care products. Despite their widespread use and potential toxic effects, few studies have reported on the occurrence of Siloxanes in the environment. In this study, we determined the concentrations of 5 cyclic and 15 linear Siloxanes in sludge collected from 40 representative wastewater treatment plants (WWTPs) in Korea. Total concentrations of 20 Siloxanes (Σsiloxane) in sludge ranged from 0.05 to 142 (mean: 45.7) μg/g dry weight, similar to the concentrations reported in European countries but higher than those reported in China. The concentrations of Siloxanes in sludge from domestic WWTPs were significantly (p
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mass loading and fate of linear and cyclic Siloxanes in a wastewater treatment plant in greece
Chemical Hazards in Industry, 2013Co-Authors: Anna A Bletsou, Alexandros G Asimakopoulos, Athanasios S Stasinakis, Nikolaos S Thomaidis, Kurunthachalam KannanAbstract:The occurrence and fate of 5 cyclic (D3 to D7) and 12 linear (L3 to L14) Siloxanes were investigated in raw and treated wastewater (both particulate and dissolved phases) as well as in sludge from a wastewater treatment plant (WWTP) in Athens, Greece. Cyclic and linear Siloxanes (except for L3) were detected in all influent wastewater and sludge samples at mean concentrations of (sum of 17 Siloxanes) 20 µg L-1 and 75 mg kg-1respectively. The predominant compounds in wastewater were L11 (24% of the total siloxane concentration), L10 (16%), and D5 (13%), and in sludge were D5 (20%) and L10 (15%). The distribution of Siloxanes between particulate and dissolved phases in influents differed significantly for linear and cyclic Siloxanes. Linear Siloxanes showed higher solid-liquid distribution coefficients (log Kd) than did cyclic compounds. For 10 of the 16 compounds detected in influents, the removal efficiency was higher than 80%. Sorption to sludge and biodegradation and/or volatilization losses are important factors that affect the fate of Siloxanes in WWTPs. The mean total mass of Siloxanes that enter into the WWTP via influent was 15.1 kg per day-1and the mean total mass released into the environment via effluent was 2.67 kg per day-1.
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mass loading and fate of linear and cyclic Siloxanes in a wastewater treatment plant in greece
Environmental Science & Technology, 2013Co-Authors: Anna A Bletsou, Alexandros G Asimakopoulos, Athanasios S Stasinakis, Nikolaos S Thomaidis, Kurunthachalam KannanAbstract:The occurrence and fate of 5 cyclic (D3 to D7) and 12 linear (L3 to L14) Siloxanes were investigated in raw and treated wastewater (both particulate and dissolved phases) as well as in sludge from a wastewater treatment plant (WWTP) in Athens, Greece. Cyclic and linear Siloxanes (except for L3) were detected in all influent wastewater and sludge samples at mean concentrations of (sum of 17 Siloxanes) 20 μg L–1 and 75 mg kg–1, respectively. The predominant compounds in wastewater were L11 (24% of the total siloxane concentration), L10 (16%), and D5 (13%), and in sludge were D5 (20%) and L10 (15%). The distribution of Siloxanes between particulate and dissolved phases in influents differed significantly for linear and cyclic Siloxanes. Linear Siloxanes showed higher solid–liquid distribution coefficients (log Kd) than did cyclic compounds. For 10 of the 16 compounds detected in influents, the removal efficiency was higher than 80%. Sorption to sludge and biodegradation and/or volatilization losses are impor...
P Gascongarrido - One of the best experts on this subject based on the ideXlab platform.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, M F Theveno, N Mainusch, Holge Militz, W Viol, Carste MaiAbstract:Abstract Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, N Mainusch, Holge Militz, W Viol, M F Thevenon, Carsten MaiAbstract:Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens. (Resume d'auteur)
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resistance of scots pine pinus sylvestris l modified with short and long chain Siloxanes to subterranean termites reticulitermes flavipes
Wood Science and Technology, 2015Co-Authors: P Gascongarrido, Holge Militz, M F Thevenon, Carsten MaiAbstract:Laboratory choice and no-choice tests following the guidelines of EN 117 (2013) were performed to assess the resistance of wood modified with short- and long-chain amino-functional siloxane emulsions to subterranean termites (Reticulitermes flavipes). Scots pine sapwood was vacuum-pressure treated to reach 2, 5 and 8 % weight percent gain. Half of the specimens (including controls) were subjected to an accelerated aging test according to the standard EN 84 (1997) prior to termite testing. In addition to visual rating, mass losses were also determined. In case of the no-choice test, silicone-treated samples were not resistant according to EN 117 (2013), even though a clear reduction in mass loss had occurred. After exposure to a choice test, the modified wood samples showed 5–10 times less mass loss than control samples, even in the case of the leached specimens. This study reveals a good performance of wood modified with short-chained amino-functional Siloxanes in resisting to R. flavipes when there is a choice of feeding.
Carsten Mai - One of the best experts on this subject based on the ideXlab platform.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, N Mainusch, Holge Militz, W Viol, M F Thevenon, Carsten MaiAbstract:Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens. (Resume d'auteur)
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resistance of scots pine pinus sylvestris l modified with short and long chain Siloxanes to subterranean termites reticulitermes flavipes
Wood Science and Technology, 2015Co-Authors: P Gascongarrido, Holge Militz, M F Thevenon, Carsten MaiAbstract:Laboratory choice and no-choice tests following the guidelines of EN 117 (2013) were performed to assess the resistance of wood modified with short- and long-chain amino-functional siloxane emulsions to subterranean termites (Reticulitermes flavipes). Scots pine sapwood was vacuum-pressure treated to reach 2, 5 and 8 % weight percent gain. Half of the specimens (including controls) were subjected to an accelerated aging test according to the standard EN 84 (1997) prior to termite testing. In addition to visual rating, mass losses were also determined. In case of the no-choice test, silicone-treated samples were not resistant according to EN 117 (2013), even though a clear reduction in mass loss had occurred. After exposure to a choice test, the modified wood samples showed 5–10 times less mass loss than control samples, even in the case of the leached specimens. This study reveals a good performance of wood modified with short-chained amino-functional Siloxanes in resisting to R. flavipes when there is a choice of feeding.
Holge Militz - One of the best experts on this subject based on the ideXlab platform.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, M F Theveno, N Mainusch, Holge Militz, W Viol, Carste MaiAbstract:Abstract Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, N Mainusch, Holge Militz, W Viol, M F Thevenon, Carsten MaiAbstract:Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens. (Resume d'auteur)
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resistance of scots pine pinus sylvestris l modified with short and long chain Siloxanes to subterranean termites reticulitermes flavipes
Wood Science and Technology, 2015Co-Authors: P Gascongarrido, Holge Militz, M F Thevenon, Carsten MaiAbstract:Laboratory choice and no-choice tests following the guidelines of EN 117 (2013) were performed to assess the resistance of wood modified with short- and long-chain amino-functional siloxane emulsions to subterranean termites (Reticulitermes flavipes). Scots pine sapwood was vacuum-pressure treated to reach 2, 5 and 8 % weight percent gain. Half of the specimens (including controls) were subjected to an accelerated aging test according to the standard EN 84 (1997) prior to termite testing. In addition to visual rating, mass losses were also determined. In case of the no-choice test, silicone-treated samples were not resistant according to EN 117 (2013), even though a clear reduction in mass loss had occurred. After exposure to a choice test, the modified wood samples showed 5–10 times less mass loss than control samples, even in the case of the leached specimens. This study reveals a good performance of wood modified with short-chained amino-functional Siloxanes in resisting to R. flavipes when there is a choice of feeding.
Carste Mai - One of the best experts on this subject based on the ideXlab platform.
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siloxane treated and copper plasma coated wood resistance to the blue stain fungus aureobasidium pullulans and the termite reticulitermes flavipes
International Biodeterioration & Biodegradation, 2017Co-Authors: P Gascongarrido, M F Theveno, N Mainusch, Holge Militz, W Viol, Carste MaiAbstract:Abstract Scots pine (Pinus sylvestris L.) sapwood specimens were subjected to a two-step treatment combining vacuum-pressure impregnation with short-chain Siloxanes followed by copper deposition on the wood surface via atmospheric pressure plasma. The obtained materials were exposed to a blue stain fungus in a laboratory test following EN 152 (2011). Copper treatment alone reduced fungal colonisation, but did not fully prevent it. A two-step treatment was able to impart high resistance to Aureobasidium pullulans. Termite resistance of siloxane-treated and copper-plasma coated wood was also assessed. A laboratory no-choice test according to EN 118 (2013) revealed strong attack by Reticulitermes flavipes, but termite mortality increased compared to untreated wood. In contrast, under choice conditions, R. flavipes exhibited significant avoidance towards the treated specimens.
