dung nghien cdu cdch td td trong thdi gian ddi, huy hoai sdc khde NLO, - Xdc dinh ndng dd cao vd thap eua Cyclohexan bang khidn hp phdi nghf mat sdc vd mang bdnh sudt ddi.. phupng phdp
Trang 1KHOA HQC, CONG NGHE - CHUYEN GIAO
XAY DUNG QUY TRINH XAC DINH NONG DO THAP
SAC KY KHi, UnJG DUNG CHO HE THONG DANH GIA
PHUUNG TIEN BAO VE CU QUAN HO HAP
CN NGUYfiN KHANH HUY^N
Vi$n Nghidn cdu KHKT BHLD
Tdm tit: 6a/ bio md ta quy trinh xic dmh nong dg hdi Cyclohexan thap va cao tren thiet
bl sk ky khi GC-9A Xiy dung dudng chuiin d dii ndng do thip 20 ^ 200 mg/m3 dexic dinh
nong do lot qua sau hop loc (nong do thip) eija Cyclohexan Xay dung dudng chuan d dai
nong do cao 200 ^ 7000 mg/m3 dexic dinh ndng do Cyclohexan trong ddng khi Cic ket
qua duoc doi chieu vi so sinh vdi k6t qui phin tich tren miy sic ky GC/FID
Abstract: This article describes the procedure or detenmining low and high
concentra-tion of Cyclohexane on the GC-9A gas chromatography The procedure includes:
establish-ing a baseline at low concentration rangestablish-ing from 20 mg/m3 to 200 mg/m3 to determine the
concentration of Cyclohexane passing through filter box; building a baseline at high
concentration, from 200mg/m3 to 7000 mg/m3 to detennine the level of Cyclohexane in the air
flow Results are collated and compared to analysis results from chromatography GC/FID
thdng ddnh gid PTBVCQHH eiia Vidn BHLD bang phuong Trong qud trinh lao ddng, nhidu khi ngudi cdng nhdn p^^p gKK
phdi Idm vide trong mdi tmdng tidp xuc vdi cdc loai chat
ddc hai, dac bidt Id eac chat hQru co Cdc loai hoi khf ddc H NOI B U N G VA PHUUNG PHAP NGHIEN CUU
hffu CO cd the gdy nhidm ddc cap tfnh tffe thdi hoac mdt 1 No! dung nghien cdu
cdch td td trong thdi gian ddi, huy hoai sdc khde NLO, - Xdc dinh ndng dd cao vd thap eua Cyclohexan bang khidn hp phdi nghf mat sdc vd mang bdnh sudt ddi phupng phdp SKK vd phuong phdp trpng lupng qua vide
Oe phdng chdng cdc loai khf, hoi hdu co trdn, bidn cdn lupng Cyclohexan cd'p vao ddng khf thd nghidm
phdp hOu hidu nhat dd bdo vd sdc khde NLD Id sd dung - Ddi chidu kdt qua xdc dinh thdi gian cd tdc dung bao cdc loai phuong tidn bao vd eo quan hd hap (PTBVCQHH) vd cua mdt sd hdp Ipc hoi hffu eo dupe thue hidn trdn he Ipc hPi khf ddc Tmdc ddy dd ddnh gid thdi gian cd tdc thdng ddnh gid PTBVCQHH cua Vidn BHLD vd kdt qua dung bdo vd eua cdc hdp Ipc hoi hffu cP, ngudi ta sd dung xdc dinh thdi gian ed tdc dung bdo vd cua nude ngodi
Benzen Song do Benzen Id hda chat ed nguy eo gdy ung 2 Phi/Png phdp nghidn cdu
thu d ngudi ndn vide sd dung Benzen trong ddnh gid thdi - Sd dung phuong phdp thue nghidm:
gian ed tdc dung bdo vd cCia cac hdp Ipc hoi hffu cP dupe + Xdc lap chd dd phdn tfch Cyclohexane trdn mdy sac thay thd bang Cyclohexan 6 nude ta, chua cd nghidn cdu ky khf Shimadzu GC-9A Ndng dd thap cua hoi Cyclohexan ndo de cap ddn vide sd dung Cyclohexan trong ddnh gid dupe xdc dinh d cdc dieu kidn thf nghidm theo tidu chuan thdi gian cd tdc dung bdo vd cua cdc hdp Ipc hPi hdu cp BS EN 14387:2004, TCVN 3740-82, tidu chuan Vd sinh bang phuong phdp sac ky khf (SKK) Bdi vidt ndy trinh bdy lao ddng 2733/2002/QD-BYT sau ddy:
kdt qud nghidn cdu xdy dung quy trinh xdc djnh ndng dd • Ndng dd cGa cyclohexan trong khdng khf (mg/m3): thap cQa hoi hffu co Cyclohexan trong ddnh gid thdi gian 3500 ±10%
4/2012 '"••"' B A O H O L A O D0NG 15
Trang 2KHOA HQC, CONG NGHE - CHUYEN GIAO
svi
• Ndng dd gidi han cho phdp
eua Cyclohexan (mg/m3): 34,3
• Luu lupng ddng khf cudn qua
binh bay hPi: 153,3 mL/ph
• Nhidt ddbd didu nhidt: 35,40,
45,50,55°C
+ Sd dung phuong phdp ngoai tj
chud'n vd edn trpng lupng dd xdc
dinh ndng dd hoi Cyclohexan vd
Benzene trong ddng khf Ndng dd
danh dinh Ct dupe xdc dinh theo
cdng thdc Ct=Am/t.Q (mg/L), trong
dd: Am Id sd miligam dung mdi hiiru
CO bi bay hoi trong thdi gian t (phiit)
vdi luu luong ddng khf pha loang Q
(L/ph)
+ Xdc dinh thdi gian bdo vd cua
hdp Ipc bang thidt bi ddng life ghdp
ndi vdi mdy sac ky khi GC-9A Thdi
gian phdn tfch: 3 phiit phdn tfch 1
mau
+ Thdi gian ed tac dung bao vd
(T) (phut) tfnh theo cdng thdc: T =
To.Co/Cct, trong dd: To la thdi gian
cd tdc dung bao vd d ndng dd CO
(phut), CO : ndng dd tmng binh cua
hoi hffu eo khi tidn hdnh thi nghidm (mg/L), Cet: ndng dd
cho tmdc eua hoi hffu co (mg/L)
So dd nguydn ly cua hd thdng ddnh gid PTBVCQHH
chf ra trdn Hinh 1
m.K£T QUA VA THAO LUAN
1 Nghien cdu xdy dUng quy trinh phdn tfch ndng
dd hoi Cyclohexan trong ddng khf
- Qua nghidn cUu khdo sdt, da xdc dinh dupe cdc didu
kidn dd phdn tfch ndng dd Cyclohexan trdn thidt bi sac ky
khf Shimadzu GC-9A nhu sau
+ Khf mang: N2
+ Tdc dd khf mang:~ 30 l/min
+ Ap suat khdng khf: 0,5 kg/cm^
+ Ap sudt hydro: 1 kg/cm^
+ Detector: FID
+ Nhidt dd detector: 250 "C
+ Nhidt dd injector: 200 °C
+ Cdt tdch: 7GE 221-11368
3,1m), Moi Sieve 5A
+ Nhidt dd cdt: 50 °C (dang nhidt)
+ Thd tfch mau bom: l^iL
+ Thdi gian luu ciia Cyclohexan: 1,6
Thiei bl bo lung am
' - 3
16
r
SV5
SV6
t^-' 22
- C - ' • ' ; > 18 18 SV4 / SV3
SV9
28 29
\
Hinh 1: Scr d6 nguyin ly he thdng dinh gii PTBVCQHH loc hai hdu c0
1 l^dyninkhl
2 B6 lgc hat
3 Thiet bl lam khd khi
4 Van dieu dp
5 Apk^
6 Van diiu dp vi chinh
7 Apk6
11 Vanti&luu
12Lirut6ckg
13 Van tiit it/u dp chat dgc
14 LiAJ t6c ke
16 Budng tron
17 Van didn tif 5
18 Van di€n tir 7
19 Van dientu 8
22 86 chuyen dong
24 Bd Igc hai khi du
25 Budng gd miu
28 Bam mdng
29 Mdy sic ky khi 30Binht>ayhai
31 Bi dieu nhiet
32 Bq dieu khien
+ Thdi gian luu cua Benzen: 2,7 + Thdi gian luu cua Carbon disulfide CS2:1,4 Xdy dung dudng chud'n xdc dinh dinh lupng Cyclohexan:
Dudng chuan 1 cua Cyclohexan xdc djnh dupe eac miu cd ndng dd td 20 ^ 200 mg/m^, dudng chuan 2 xac dinh dupe cdc miu ed ndng dd td 200-7000 mg/m^ Ket qud dupe bidu didn trong Hinh 2 vd 3
2 Dinh li/Ong ndng dd Cyclohexan ban dau
Bdng 1 cho ta thdy dd Idch giffa hai phuong phdp xac dinh ndng dd danh dinh vd ndng dd thuc Id khdng Idn, kdt qud vd phuong phdp phdn tfch dat dd tin eay cao
11 (3,2mm x
Bdng 1: M6i
Nhiet ddbd difiu nhiet, "C
35
40
45
50
55
quan hi nhiit dd •
Ndng do danh dinh do bang PP
cdn, mgixv?
2.261 2.882 3.346 3.667 3.987
nSng dd hai Cyclohexan
Ndng do thuc trung binh do bang PPSKK,mg/m3 2.320 2.820 3.316 3.614 3.707
DO lech giffa 2PPdo,% -2,61 2,15 0,90 1.45 7,02 ,
16 BSUI HO LAO D0NG 4/2012
Trang 3KHOA HQC CONG NGHE - CHUYEN GIAO
(XIOOO)
- 12
( X
T l '
•3 8
Q 3
0
_
"
_
Non? do '?\''.iohrv.Tii
Hinh 2: DUdng chuin 1 xic dmh
nSng dp Cyclohexan td20 v- 200 mg/rrf
(X 100000)
4
0-,
r: 2
a 1
0
Uviig do'-'ycl
6 'lieinii
8 (XlODO)
Hinh 3: DUdng chuin 2 xic djnh nSng dd Cyclohexan td200 -^ 7i!7^^ mg/nf
n
E
°5)
E
e'
>>
u
«•
0)
c
•« z
160,00
140,00
120,00
100,00
80,00
60,00
40,00
20,00
7
—
8 80 82 84 86
Th£ri gian, phut
8 8
250,00
C l
•f, 200,00
E
>> 100,00
o
o
^ 50,00
z
7
-0 75
-80 85 90 95 100 Thd"! gian, phiit
-^
105
- /
-110 115
Hinh 4: Ket qua dinh gii hop Igc loai 1
Bang 2: Dac diem cua hop Ipc vi dieu Iden dinh gia
Ndi dung
Dae diem
Dieu kidn
ddnh gid
Hop Ipc loai 1
- Dudng kfnh D = 80mm
- Chidu eao H = 34 mm
-Khdi lupng m = 92,18g
- Ndng dd Cyclohexan
dau vdo: 3620 mg/m^
Ndng dp Cyclohexan
dau ra: 34,3 mg/m^
Hop Ipc loai 2
- Dudng kfnh D = 80mm
- Chidu eao H = 38 mm
- Khdi lupng m = 95,5g Ndng dd Cyclohexan dau vdo: 3702 mg/m^
Ndng dd Cyclohexan dau ra: 34,3 mg/m^
Bang 3: So sanli Icet qua dinh gii thdi gian co tac dung bio ve
cua hop Igc cOa Vien BHLD va KOSHA - HQ
Loai hdp Ipc
Hdp Ipc loai 1
Hdp Ipc loai 2
Kdt qud ddnh gid
CLia De tdi (phut)
86
100
Kdt qua ddnh gid cua KOSHA - HQ (phut)
84,5
101
Hinh 5: Kit qua dinh gii hop Igc loai 2
Dieu kidn thfch hpp de dinh lupng ndng
dp hPi Cyclohexan trong ddng khf theo tidu chuan da dupe xdc dinh Id:
- Nhidt dp bd dieu nhidt: 500C Luu luong ddng khf qua binh bay hoi: 153,3 mL/ph.'
3 Xdc djnh thdi gian bao ve cua hop loc
Nhdm nghidn cUu da tap trung vdo vide ddnh gid thd nghidm khd nang bdo vd cua hdp Ipc vdi hPi Cyclohexan vd lua chpn ddnh gid 2 loai hdp Ipc do Hdn Qudc san xuat, dudi ddy tam gpi Id hdp Ipc loai 1 ,vd loai 2 (xem Bang 2) Kdt qud ddnh gid dupe dua ra d Hinh 4,5
Ta xdc dinh dupe thdi didm Ipt qua tai ndng
dd xdc dinh cGa hdp Ipc loai 11d 83 phut, cDa hdp Ipc loai 2 Id 94 phut Thdi gian bao vd cija hdp Ipc dng vdi ndng dd dau vdo theo tidu chuan dupe tfnh theo cdng thdc T = To.Co/Cct,
4/2012 Tf p chi BAO HO LAO D0NG 17
Trang 4KHOA HQC, CONG NGHE - CHUYEN GIAO
r
Ngdy 22/3/2012, trong khudn khd cdc hoat ddng
hudng dng Tudn Id Qudc gia vd AT-VSLD, PCCN Idn
thd 14 ndm 2012, lanh dao Tap chf Bdo Hd Lao Ddng
cung dai didn CD XN Ddu mdy Hd Ndi dd ddn tham,
tang qud anh Tofong Xudn Thdc - ngudi dupe nhdn
Hudn chuong dung cdm do Chu tich Nude trao tang vd
hdnh ddng xd thdn cdu 300 hdnh khdch di tdu
Cdch ddy gdn 2 ndm, ngdy 6/8/2010, dodn tdu
TN6 td TP Hd Chf Minh ra Hd Ndi dd va cham vdi mdt
xe tdi chd cdt khi xe tdi bdt ngd bang qua dudng tdu.Anh
Truong Xudn Thdc, khi dd Id ldi tdu da xd thdn gid chat
cdn hdm gidm tdc dodn tdu (thay vi chf gat cdn ham rdi
lui ngudi lai) Hdnh ddng eua anh da khidn anh md't di
mdt phdn thdn thd, nhung da ddm bdo dupe an todn
cho hon 300 hdnh khdch trdn tdu
Hidn tai, cudc sdng eua gia dinh anh du cd khd
khan, vdt vd, bdn thdn anh trdn co thd cd nhidu vdt
thuong, bi mat mdt phan cdnh tay trdi, nhdng hdm trdi
gid, trd trdi lai khidn anh phdi vdt ldn vdi nhdng eon
dau hanh ha nhung anh ludn tdm nidm ldi day eua Bdc
Hd "tdn nhung khdng phd", sdng cd y nghTa vd gdp fch eho ddi
Tdi thdm anh, Idng nghe anh chia se nhOng khd khan, nhdng tam ti; nguyen vong cua anh trong cuoc song, dai didn Cong doan XN Dau may Ha Noi khSng dinhi CB va lanh dao XN se luon ben anhi, giup da anti trong cuoc sdng
Trong dip nay, Dai dien lanh dao Tap chi Bao Hp Lao Dong trao tang anh phan qua 1 tneu dong va mong anh vaot qua nhCrng kho khan cua cuoc song, luon xung ddng la tam gi/ong sang ve hanh dong dung cam, quen thdn cLfu nguail-l
trong dd Cet = 3500 mg/m3, TO = 83 phut, CO = 3620 mg/
m l
Vdi hdp Ipc loai 1 vd 2 ta cd thdi gian bdo vd dng vdi
ndng dd ddu vdo theo tidu chudn lan luot Id: Tl=83*3620/
3500 = 85,8 ^ 86 phdt; T2= 94*3702/3500 = 99,5 H- 100
phut
Ddi chidu kdt qud ddnh gid thdi gian cd tdc dung
bdo vd cua cdc hdp Ipc hoi hdu co ndi trdn dupe d i n ra
trong Bdng 3
IV K£T LUAN
- Da thidt Idp ehd dd phdn tfch Cyclohexan trdn mdy
saekykhfGC-9A;
- Da dinh lupng dupe ndng dd hPi Cyclohexan ban
dau trong ddng khf theo tidu chudn BS EN 14387:2004,
TCVN 3740-82, tidu chudn Vd sinh lao ddng 2733/2002/
QO-BYT theo cd hai phuong phdp cdn xdc dinh ndng dd
danh dinh vd phuong phdp sac ky khf xdc dinh ndng dd
thuc vdi dd Idch gida 2 phuong phdp Id khdng ddng kd
vd phu hpp vdi didu kidn thidt bi cda phdng thf nghidm
An todn hda chat thudc Vidn BHLD
- Da tidn hdnh ddnh gid thd nghidm khd nang bdo
vd cua hdp Ipc vdi hPi Cyclohexan vd cho kdt qud tin cdy
Tdi ligu tliam khdo
1 Nghien cuu xdc dmh thai gian bao ve cua lap than hoat tinh
vdi hai benzen b^ng phuang phip s^c ky khi Tac gia: Bui V^n Tai,
Nguyin Hung Phong Trung tam KHKT-CNQS 9'2006
2 Nghien aru mot so loai PTBVCQI-II^ cho NLD lam viec trong
diSu l(ien tiep xuc vdi hoa cha! doc hai dang swang Ma so: 204/5/ TLD, fee gia: TS D^ng Quoc Nam Vien nghien cuu KHKT BHLD
3 Nghien aru, thiet ke che tao thiet bi cap khi doc c6 kha nang chdng Sn mon va dn dmh trong cac he thong thir nghiem Ma so: 207/ 05/TLD Vien n/c KHKT Bao ho Lao dong
4 irng dung sSc ky khi nghien ciru dudng cong thdat ciia hai hCtu CO tren than hoat tinh Tic gii: Le Huy Du • tap chi Hda hoc, tap
23,Hi Noi 1985
5 Sic ky khi - Ca sa ly thuyet va cic ky thuat ip dung Tic gia
: Nguyen Hung Viet NXB KHKT 2005
6 Tieu chuan TCVN 3741-82
7 Tieu chuSn BS EN 13784 : 2002
B Tieu chuan Ve sinh cho phep so 3733-2002, BoVte
9 Cyclohexane as an Alternative Vapor of Comment (^rbonTetrachloride for the Assessment of Gas Removing Capaci-ties of Gas Mask Mitsuya FURUSE1, Seiichiro KANNO, Tsuguo
TAKANO and Yoshimi MATSUMURA, Japan 2000
10 The Wheeler-Jonas equation: a versatile tool for the predic-tion of carbon bed breakthrough times P Lodewyckx, G.O V/ood, S.K Ryu; Carbon 42 (2004)1351-1355.U
18 Tf p cM BAO HO LAO DONG 4/2012