AbstractThis paper conducts a study and analyzes five kinds of dust samples of different environment, including an office area,a ground station of the new plant, the first workshop of coking, a top of coke oven and a ground station of the old plant in coking plant and obtaines the distribution pattern of PAHs in the coking dust by the way of ultrasonic extraction and high performance liquid chromatography. The data show that PAHs from the first workshop turns out to be the richest with its content getting up to 12.00μgám-3. By analyzing the single component distribution of PAHs, the results show that there are fourteen kinds of PAHs produced at 5 sites. Through analyzing the particle size of coking dust, its size is mainly below 10μm and its contents exceeds to 75%. The first workshop environment is the highest and reaching 98.39%

Hou, Xinran

Wang, Fusheng

Xing, Shilei

Elsevier - Publisher Connector 

Study on the Distribution Pattern of PAHs in the Coking Dust from the Coking Environment 

 Procedia Engineering  45 ( 2012 )  959 – 961 
1877-7058 © 2012 Published by Elsevier Ltd.
doi: 10.1016/j.proeng.2012.08.265 
2012 International Symposium on Safety Science and Technology 
Study on the distribution pattern of PAHs in the coking dust from the 
coking environment 
WANG Fushenga,b,*, XING Shileia, HOU Xinrana 
aCollege of Mining Engineering, Hebei United University, Tangshan 063009, Hebei, China 
bMining Development and Safety Technology Key Lab of Hebei Province, Tangshan 063009, Hebei, China 
Abstract 
This paper conducts a study and analyzes five kinds of dust samples of different environment, including an office area,a ground station of 
the new plant, the first workshop of coking, a top of coke oven and a ground station of the old plant in coking plant and obtaines the 
distribution pattern of PAHs in the coking dust by the way of ultrasonic extraction and high performance liquid chromatography. The data 
show that PAHs from the first workshop turns out to be the richest with its content getting up to 12.00 μg·m-3. By analyzing the single 
component distribution of PAHs, the results show that there are fourteen kinds of PAHs produced at 5 sites. Through analyzing the 
particle size of coking dust, its size is mainly below 10μm and its contents exceeds to 75%. The first workshop environment is the highest 
and reaching 98.39%. 
 
© 2012 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the Beijing Institute of 
Technology. 
 
Keywords: coking; the environment dust; PAHs; distribution pattern. 
1. Introduction 
Polycyclic Aromatic Hydrocarbons is a kind of typical and ubiquitous persistent organic pollutants which has 
carcinogenicity-mutagenicity-teratogenicity effect and it comes mainly from incomplete combustion of fossil fuels, timber, 
tobacco and plastic [1]. Due to a harmful effect on human health, Polycyclic Aromatic Hydrocarbons has been paid wide 
attention by international scientists and scholars. 
The coking operation of coking plant is a process that dry distillates the coal under the conditions of anaerobic high 
temperature in the coke oven and then produces the metallurgical coke which is indispensable to industries, for example 
iron-making. During the process of dry distillation, the organic components which are distilled by a complex procedure of 
cracking and polymerization and then generate large amount of single-ring and polycyclic aromatic compounds and other 
pollutants. PAHs emissions from the process of coking is a major source of polycyclic aromatic hydrocarbons in the 
atmosphere and it’s seriously endangering people’s health [2-4]. 
Based on the process characteristics of coking and the layout of coking plant, this paper conducts a comparative study 
and analysis of five sampling points determined in a coking plant in Tangshan and obtains the distribution pattern of PAHs 
in the coking dust by the way of ultrasonic extraction and high performance liquid chromatography. The distribution pattern 
provides a theoretical basis for the realization of controlling the PAHs content emissions from the coking and reducing 
environmental pollution. 
 
 
 
* Corresponding author. Tel.: 137-8550-8509. 
E-mail address: fswang3418@163.com 
Available online at www.sciencedirect.com
Open access under CC BY-NC-ND license.
Open access under CC BY-NC-ND license.
960   WANG Fusheng et al. /  Procedia Engineering  45 ( 2012 )  959 – 961 
 
2. Experiment part  
2.1. Sample collection 
The samples of experiment come from a coking plant in Tangshan. The dust samples in environment are collected by the 
TH-150Ⅲ intelligent mid-flow rate air suspension-atom sampler. Based on the process characteristics of coking and the 
layout of coking plant, this paper determines five sampling points: 
Sampling point 1- office area (southeast of office building, 10m away from the coking plant); 
Sampling point 2- ground station of the new plant; 
Sampling point 3- first workshop of coking (located downwind of coke oven and coke dry quenching); 
Sampling point 4- top of coke oven; 
Sampling point 5- ground station of the old plant (located downwind of coal yard). 
2.2. Experimental instrument 
Experimental instrument mainly includes Agilent-1100 high performance liquid chromatography with UV detector and 
fluorescence detector, KQ-250 DE CNC ultrasonic washer, 80-3 Large-capacity centrifuge. 
3. Experimental results and discussion 
3.1. Dust concentration of PAHs in different sites 
Dust concentration of PAHs in coking plant is given in Table 1. 
Table 1. The mass concentration of PAHs in dust 
Sampling site Sample name Concentration of PAHs/(μg·m-3)
1 Office area 0.19 
2 Ground station of new plant 1.14 
3 First workshop of coking 12.00 
4 Top of coke oven 1.04 
5 Ground station of old plant 9.00 
 
These data show that the mass concentration of PAHs in various points of the plant area were higher than the office area 
because of the coking’s impact. In the plant area, concentrations of PAHs in the first workshop of coking reaches 
12.00μg·m-3. The dust come from the process of coking and the coal dry distillate always advances in high temperature 
environment without air which provides the conditions for the formation of PAHs. In such high temperature environment, 
the increasing of the activation degree of particles emittes from coke oven that leads to the increasing of adsorption of 
particles. So long as there is an effective collision between particles and free PAHs during the diffusion process it is easy to 
be adsorbed [5]. As a result, the concentration of PAHs is highest. The office area is located upwind of the plant, so its 
concentration of PAHs is the lowest .The reason that the concentration of PAHs in new ground station is lower than the old 
one is that the equipments in the ground station of new plant is newer and the effect of sealing and dusting is better. 
3.2. Distribution pattern of PAHs in the coking dust 
The composition and mass ratio of PAHs single component in dust is given in Table 2. 
Based on Table 2, there are 14 kinds of PAHs in the 5 sampling sites and all of them are PAHs compounds which U.S. 
EPA preceding controlled. The detection of five samples all includes AcP, PhA, AnT, BaA, Chr, BbF, BkF, BaP, DbA and 
BghiP. 
Detection of dust in office area includes 13 kinds of PAHs compounds. Among them, the content of BaP is the highest 
and its mass fraction is 18.69%. Detection of dust in ground station of new plant includes 10 kinds of PAHs compounds and 
Chr’s mass fraction is the highest one reached 49.82%. Detection of dust in first workshop of coking including 13kinds of 
PAHs compounds and BaP’s mass fraction is the highest one that reaches 17.72%. Detection of dust in top of coke oven 
including 13 kinds of PAHs compounds and Chr’s mass fraction is the highest that reaches 23.85%. Detection of dust in 
961 WANG Fusheng et al. /  Procedia Engineering  45 ( 2012 )  959 – 961 
 
ground station of old plant includes 13 kinds of PAHs compounds and BaP’s mass fraction is the highest one that reaches 
16.88%. 
Table 2. The composition and mass ratio of PAHs single component in dust (%) 
PAHs Office area 
New 
ground 
station 
First 
workshop of 
coking 
Top of 
coke 
oven 
Old ground 
station PAHs 
Office 
area 
New 
ground 
station 
First 
workshop 
of coking 
Top of 
coke 
oven 
Old 
ground 
station 
NaP 4.66 0 0 1.63 0 BaA 0.45 3.43 9.68 7.60 9.86 
AcP 3.52 1.58 6.50 5.10 7.06 Chr 12.92 49.82 14.08 23.85 13.37 
`Flu 3.13 0 0.10 1.06 0.06 BbF 12.61 5.63 10.54 10.19 10.32 
PhA 15.01 27.73 1.01 4.42 0.72 BkF 4.29 2.20 4.37 4.23 4.31 
AnT 1.28 0.26 0.51 0.96 0.60 BaP 18.69 7.66 17.72 17.02 16.88 
FluA 6.03 0 16.20 4.23 13.11 DbA 4.63 1.32 3.55 3.85 3.33 
Pyr 0 0 5.33 0 9.88 BghiP 12.80 0.35 10.43 15.87 10.49 
3.3. Distribution Pattern of PAHs in different particle size of dust 
The contents of PAHs in different diameter dust are given in Table 3. 
Table 3. The contents of PAHs in different diameter dust (%) 
Diameter Office area New ground station First workshop Top of coke oven Old ground station 
0-10μm 83.45% 95.62% 98.39% 75.61% 81.14%
10-100μm 16.55% 4.38% 1.61% 24.39% 18.86% 
 
The particles which air equivalence 10μm is called inhaled particle matter and represented as PM10. Based on the table 
3, PAHs of the five samples dust mainly concentrate on PM10 and mass fractions are over 75%. The mass fraction of first 
workshop is the highest that reaches 98.39% which exhibits the accumulation characteristics to small-size particle and is 
harmful to human health. 
4 Conclusions 
This paper collectes dust samples in five sites of coking plant and analyzes distribution pattern of PAHs. The 
conclusions are as follows: 
(1) The distribution pattern of total PAHs in dust: under the condition of coking, the mass concentration of PAHs in 
various points of the plant area are higher than the office area. In the plant area, concentrations of PAHs in the first 
workshop of coking is the highest that reaches 12.00μg·m-3and in the office area is the lowest that reaches 0.19 μg·m-3  
(2) There are 14 kinds of PAHs in the 5 sampling sites and all of them are PAHs compounds which U.S. EPA 
preceding controlled. The detection of five samples all includes AcP,PhA,AnT,BaA,Chr,BbF,BkF,BaP,DbA and BghiP and 
mass concentrations of Chr and BaP are higher than others’. 
(3) PAHs of the five samples dust mainly concentrate on PM10 and mass fractions beyonds 75%. The mass fraction of 
the first workshop is highest that reaches 98.39%. 
References 
[1] Lu Chengang, Li Chunlei, Chen Limin, 2006. The correlation of size distribution and gas/particle partitioning of atmospheric polycyclic aromatic 
hydrocarbons (PAHs), Journal of China Environment Science 26, p. 153-156. 
[2] ROMUNDSTAD P R, RONNEBERG A, LEIRA H L, 1998. Health survey of former workers in a Norwegian coke plant: part.1, Estimation of 
historical exposures 55, p. 616-621. 
[3] Li Yunlan, 2004. Source and harm of waste gas caused by coking production, p. 82-83. 
[4] Wang Jing, Zhu Lizhong, Shen Xueyou, 2003. Pollution status and health risk assessment of PAHs in a coking plant, Environment Science, p. 135-138. 
[5] PETTY T, SCHMID P, SCHLATTER C, 1996. The use of toxic equivalency factors in assessing occupational and environmental health risk associated 
with exposure to airborne mixtures of polycyclic aromatic hydrocarbons (PAHs), Chemosphere, p. 634-648. 
 


file:///data/remote/core/dit/data/elsevier/pdf/af2/aHR0cDovL2FwaS5lbHNldmllci5jb20vY29udGVudC9hcnRpY2xlL3BpaS9zMTg3NzcwNTgxMjAzMjc3OA==.pdf

Study on the Distribution Pattern of PAHs in the Coking Dust from the Coking Environment

Abstract

Similar works

Full text

Available Versions

Elsevier - Publisher Connector

Elsevier - Publisher Connector