Pollution Characteristic of VOCs during Straw Burning Period in Chengdu, China

2015 ◽  
Vol 737 ◽  
pp. 495-498
Author(s):  
Hong Ling Yin ◽  
Hua Wei Yuan ◽  
Zhuang Hu ◽  
Jin Feng Liang ◽  
Shi Ping Li
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Aromatic Hydrocarbons ◽  
Photochemical Reaction ◽  
Reaction Type ◽  
Volatile Organic ◽  
Aldehydes And Ketones ◽  
Straw Burning ◽  
Main Components

Volatile organic compounds (VOCs) were analyzed in straw burning period and non-straw burning period in the center of Chengdu city. The results showed that the concentrations of TVOC during straw burning were significantly higher than that in the non-straw burning period in Chengdu. The main components were alkanes, aromatic hydrocarbons and esters in straw burning period while aromatic hydrocarbons, alkanes, esters, aldehydes and ketones as the main contents in the period of non-straw burning. The correlation of TVOC, SO2, NO2, PM10, PM2.5, CO, O3 and the API index was discussed and the NOX-sensitive of photochemical reaction type was determined by the ratio of TVOC / NO2 during straw burning period.

Characteristics of TVOC, Aldehydes and Ketones Emitted from Fiber Hot-Pressing in Manufacturing of MDF made from Poplar and Pine

2013 ◽  
Vol 567 ◽  
pp. 9-13
Author(s):  
Y.L. Wang ◽  
Zhi Gang Lu ◽  
P.P. Zhang ◽  
Han Dong Zhou
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Hot Pressing ◽  
Medium Density Fiberboard ◽  
Production Capacity ◽  
Saturated Hydrocarbons ◽  
Volatile Organic ◽  
Aldehydes And Ketones ◽  
Main Components ◽  
Total Volatile Organic Compounds

This study, by means of GC-MS and HPLC, investigated the characteristics of volatile organic compounds (VOCs) released from fiber hot-pressing in a medium density fiberboard (MDF) production line with a production capacity of 80,000 m3/a. The quantity of total volatile organic compounds (TVOC), aldehydes and ketones were calculated. The results showed that the concentration of TVOC reached 1.8940 mg/m3. The main components include terpenes, acrolein and acetone, benzenes series and saturated hydrocarbons. The concentration of the mixture of aldehydes and ketones was 5.1136 mg/m3.

Characteristics of TVOC, Aldehydes and Ketones Emitted from Fiber Dryer in Manufacturing of HDF Made from Poplar and Pine

2012 ◽  
Vol 260-261 ◽  
pp. 930-934
Author(s):  
Shan Huang ◽  
Pei Guo Zhou ◽  
Zhi Gang Lu ◽  
Gui Zhen Zhang ◽  
Wen Bin Sang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Production Line ◽  
Production Capacity ◽  
Total Volatile ◽  
Alpha Pinene ◽  
Volatile Organic ◽  
Aldehydes And Ketones ◽  
Main Components ◽  
Total Volatile Organic Compounds

This study, by means of GC-MS and HPLC, investiagted the characteristics of volatile organic compounds (VOCs) released from fiber dryer in a high density fiberboard (HDF) production line with a production capacity of 100,000 m3/a. The quantity of total volatile organic compounds (TVOC), aldehydes and ketones were calculated. The results showed that the concentration of VOCs reached 0.5275 mg/m3. The main components include benzenes series (42.7%), terpenes (11.0% alpha pinene), alkanes (11.2%), anhydrides (4.7%) and aldehydes (3.1%). The concentration of the mixture of aldehydes and ketones was 8.8594 mg/m3. The annual emission of TVOC and the mixture of aldehydes and ketones from HDF fiber dryer were 836 kg/a and 14033 kg/a, respectively.

scholarly journals Achieving a healthy indoor environment by using an emissions barrier for stopping spread of chemicals from building into the indoor air

2021 ◽  
Author(s):  
Johan Mattsson ◽  
Lennart Larsson
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Indoor Air ◽  
Aromatic Hydrocarbons ◽  
Indoor Environment ◽  
Concrete Slab ◽  
Treated Wood ◽  
Volatile Organic ◽  
Polycyclic Aromatic

An emissions barrier was used in premises with indoor air complaints due to emissions from the buildings in question. The emissions comprised chlorophenols/chloroanisoles and polycyclic aromatic hydrocarbons (PAH) from treated wood, and volatile organic compounds (VOC), mainly 2-ethylhexanol, from PVC flooring and the glue used to paste the flooring onto a concrete slab. Attaching the barrier at the surfaces from where the emissions were spread (floor, walls, ceiling) resulted in a fresh and odour-free indoor air. We conclude that using an emissions barrier in buildings made unhealthy by moisture is an efficient way of restoring a pleasant and healthy indoor air.

Use of External Radical Sources in Flash Vacuum Pyrolysis to Facilitate Cyclodehydrogenation Reactions in Polycyclic Aromatic Hydrocarbons

2014 ◽  
Vol 67 (9) ◽  
pp. 1338 ◽  
Author(s):  
Aaron W. Amick ◽  
Sara E. Martin
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Aromatic Hydrocarbons ◽  
Flash Vacuum Pyrolysis ◽  
Vacuum Pyrolysis ◽  
Ability To Act ◽  
New Process ◽  
Volatile Organic ◽  
Polycyclic Aromatic

A new process to facilitate the cyclodehydrogenation of polycyclic aromatic hydrocarbons (PAHs) in flash vacuum pyrolysis (FVP) using an external radical source is described. Using hexanes as an external radical source the conversion of various PAHs to their cyclodehydrogenated products is vastly increased. Various other volatile organic compounds were also examined to determine their ability to act as external radical sources in FVP.

scholarly journals A comprehensive study of volatile organic compounds from the actual emission of Chinese cooking

2021 ◽  
Author(s):  
Chengyi Sun ◽  
Liyun Zhao ◽  
Xue Chen ◽  
Lei Nie ◽  
Aijun Shi ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Hazard Index ◽  
Gaseous Pollutants ◽  
Catering Industry ◽  
Current Perspective ◽  
Ozone Formation Potential ◽  
Volatile Organic ◽  
High Hazard ◽  
Main Components

Abstract China’s current perspective for big cities were filled with great population, great number of restaurants, growing gaseous pollutants and great pollution. Volatile organic compounds (VOCs) were main components of catering industry gaseous pollutants. In this study, we collected and analyzed VOCs from Home cooking (HC), Sichuan and Hunan cuisine (S&H), Shandong cuisine (SD), Anhui cuisine (AH), Beijing cuisine (BJ) and Barbecue (BBQ). The result showed that BBQ gave the highest VOCs concentration (6287.61 µg•m− 3), followed by HC (1806.11 ± 2401.85 µg•m− 3), SD (2238.55 ± 2413.53 µg•m− 3), AH (1745.89 µg•m− 3), S&H (1373.58 ± 1457.45 µg•m− 3) and BJ (288.81 µg•m− 3). The abundance of alkane was higher among BBQ, Anhui Cuisine and HC with the proportion from 33–71%. SD contained higher halohydrocarbons proportion (33%). BJ characterized by high-oxygenated volatile organic compounds proportion (50%). The ozone formation potential (OFP) of BBQ was much greater than other cuisines. The degree of stench pollution from cooking VOCs of HC was 17.51 ± 16.95, followed by S&H (15.77 ± 16.85), SD (15.12 ± 14.17), AH (16.29), BBQ (2.58) and BJ (1.81). Benzene had highest life cancer risk (LCR) in SD (2.11⋅10− 5 ± 3.12⋅10− 5), following HC (4.50⋅10− 6 ± 3.83⋅10− 6) and S&H (4.08⋅10− 6 ± 4.49⋅10− 6). Acrolein had a high hazard index (HI) in HC (789.81 ± 768.77), following AH (728.78), S&H (689.89 ± 776.07), SD (664.29 ± 648.77), BBQ (65.93) and BJ (62.84).

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