
























2 






Content.

I. L do chn đ ti
t trong nh ln    
 
hin nay chc  hu h m
nng do phi chng mng lc thi t  
nghip.

- 

 


         
.



.
I. Tnh cp thit ca đ ti


















III. Mc tiêu nghiên cu
ng kim loi n m ca kim loi
nc ca h ch.
ng mt s kim loi nng trong mt s t  2 h

IV. Kê
́
t câ
́
u luâ
̣
n văn
- 

77 trang, 


+ I: 








, 

, 




2.1. Địa điểm nghiên cu
2.1.1. Hồ Trúc Bch, phƣờng Trúc Bch, quận Ba Đình, thnh phố H Nội
H   t h thuc qu     i, Vit Nam,
t phn h  rng 242191.278 m
2
 a
n: 21
o
03'10'' B, kinh tuyn: 105
o

2.1.2. Hồ Thanh Nhn, Đƣờng Thanh Nhn, quận Hai B Trƣng, thnh phố H Nội
H  thuc qu i, h c
ci to t h t 
tui tr

2.2. Thời gian nghiên cu
u tit:
- t 1: 21- 22/ 04 /2010 - t 2: 13- 15/ 07 /2010
- t 3: 23- 24/ 11 /2010 - t 4: 02- 03/ 03 /2011

Bc tng hp trong bng 3.1:
Bảng 3.1. Thông số thy l hóa hồ Trúc Bch
pH
Nhiệt độ
(
o
C)
DO
(mg/l)
BOD
5

(mg/l)
COD
(mg/l)
NH
4
+

(mg/l)
Trúc
Bch
Đợt 1
TB1
7,7
26,6
3,4

145,6
3,5
TB3
6,9
34,0
1,3
105,0
142,4
6,0
Đợt 3
TB1
7,5
22,9
1,4
73,0
105,0
0,75
TB2
7,6
22,9
0,7
72,0
104,0
1,5
TB3
7,5
23,1
0,4
72,0
102,0

 
<10

1,0 -
1,5
(Ghi chú : TB : hồ Trúc Bạch, 1: gần cống phía đường Thanh Niên, 2 : giữa Hồ, 3 : gần mương
Ngũ Xã)
3.2.2.Hồ Thanh Nhn
Kt qu th c th hin qua bng sau :
Bảng 3.3. Thông số thy l hóa hồ Thanh Nhn pH
Nhiệt độ
(
o
C)
DO
(mg/l)
BOD
5

(mg/l)
COD
(mg/l)
NH
4
+

(mg/l)

TN2
6,4
37,0
0,3
71,2
120,8
1,0
TN3
6,5
36,0
0,6
29,2
40,0
1,5
Đợt 3
TN1
7,6
23,1
0,8
86,0
125,0
0,4
TN2
7,6
23,3
2,6
88,0
122,5
0,4
TN3

6,5 –
8,5
Nhiệt độ tự
nhiên ca
thy vực
 
<10

1,0 – 1,5

(TN : Hồ Thanh Nhàn TN1 : vị trí gần cống thoát nước,TN2 : giữa , TN3 : gần cầu)
.3. Hm lƣợng kim loi nặng trong nƣớc ca các hồ nghiên cu
3.3.1.Hồ Trúc Bch
Bảng 3.5. Hm lƣợng kim loi nặng trong nƣớc hồ Trúc Bch
Hồ nghiên cu
Cd (mg/l)
Cu (mg/l)
Pb (mg/l)
As (mg/l)

Hg (mg/l)

Trúc Bch
Đợt 1

0
0,04
0,021
0,019
0,0015

0,0002 –
0,004

3.3.2. Hồ Thanh Nhn.
Bảng 3.6. Hm lƣợng kim loi nặng trong nƣớc hồ Thanh Nhn
Hồ nghiên cu
Cd (mg/l)
Cu (mg/l)
Pb (mg/l)
As (mg/l)

Hg (mg/l)

Thanh Nhn
Đợt 1

0
0,04
0,019
0,008
0,0002
Đợt 2

0,0002
0,073
0,032
0,094
0,001
Đợt 3


Pb (mg/kg)
As (mg/kg)
Hg (mg/kg)
Trúc
Bch
Đợt 1

2,0305
146,592
97,563
101,525
1,649
Đợt 2

0,971
124,383
128,330
58,538
1,046
Đợt 3

1,148
131,527
303,788
61,346
0,522
Đợt 4

0,960
89,035

0,187
29,51
24,18
7,994
0,039

Đợt 3

0,491
54,939
53,967
10,842
0,322

Đợt 4

0,223
25,254
28,179
2,78
0,176
OMESL [52]
0,60-10,0
16,0-110,0
31,0-250,0
6,0-33,0
0,2-2,0

3.5. Kt quả phân tch hm lƣợng kim loi nặng trong các mẫu sinh vật
3.5.1. Hm lƣợng kim loi nặng trong các mẫu sinh vật hồ Trúc Bch

44,575
1,968
0,624
Đợt 4

0,167
26,473
24,171
3,476
0,141
TVN
Đợt 1

0,447
13,639
18,006
8,762
1,1291
Đợt 2

0,971
124,383
128,33
58,538
1,046
Đợt 3

0,104
26,257
44,575

3,6892
0,5355
0,9996
0,0975
Đợt 2

0,0250
7,5250
2,4240
1,7670
0,1860
Đợt 3

0,0150
13,5970
1,4710
0,7550
0,0310
Đợt 4

0,030
17,3820
2,4230
0,3670
0,0210
Bảng 3.12. Hm lƣợng kim loi nặng trong cá hồ Trúc Bch
Hồ Trúc Bch
Cd (mg/kg)
Cu (mg/kg)
Pb (mg/kg)

0,1920

0,0130 Cá trôi

Đợt 1 0,0341

1,7385

0,6249

0,5454

0,0341
Đợt 2

-
-
-
-
-
Đợt 3

0,0150
2,8310

0,3890
0,0390
Đợt 4

0,0090
2,7880
1,8160
0,9010
0,0170
QĐ 46 ca
Bộ Y t đối với cá [53]
0,0500
0,0500
30,0000
2,0000
0,2000

3.5.2. Hm lƣợng kim loi nặng trong các mẫu sinh vật hồ Thanh Nhn
* Nhóm sinh vật nổi: ng kim loi nt ni h Thanh
c tng hp qua bng 3.13:
Bảng 3.13. Hm lƣợng kim loi nặng sinh vật nổi hồ Thanh Nhn
Hồ Thanh Nhn
Cd
(mg/kg)
Cu
(mg/kg)
Pb
(mg/kg)
As
(mg/kg)

0,1070
TVN
Đợt 1

1,6030
281,3290
92,3660
7,3770
1,6230
Đợt 2

0,1870
29,5100
24,1800
7,9940
0,0390
Đợt 3

0,1570
26,2240
49,4380
1,1270
0,5760
Đợt 4

0,0650
11,0070
14,8450
0,6150
0,1070

0,1010
Đợt 3

0,0410
22,0450
1,9860
0,9000
0,0290
Đợt 4

0,0110
10,2520
3,2580
0,5530
0,0250 Bảng 3.14. Hm lƣợng kim loi nặng trong cá hồ Thanh Nhn
Hồ Thanh
Nhn
Cd
(mg/kg)
Cu
(mg/kg)
Pb
(mg/kg)
As
(mg/kg)
Hg
(mg/kg)

-
-
Cá
trôi
Đợt 2
0,0090
1,8050
1,8510
0,9720
0,1850

Đợt 3
0,0070
1,4530
0,8910
0,0450
0,0660

Đợt 4
-
-
-
-
-
Cá rô
phi
Đợt 1
0,0424
0,7635
0,6044

t TCVN.
ng kim loi nc:
- C 2 h u b m kim loi Cu, Pb, As.
- 2 kim loy vng rt thi d vt.
ng kim loi n
-  ch b m Cu, Pb, As,   m
Cu.
- ng kim loi nng kim loi nng
c.
4. ng kim loi nng trong sinh vt:
- i n 
ng vt ni, thc vt ni.
- ch nh ca b y
t i Cu, Cd, Hg, As vn nnh.
KIẾN NGHỊ
1. ng ca As, Zn, Cu, Pb, Cd trong  sinh vt.
2. Vit Nam cn sng kim loi trong tr.
3. Ph c thm tra chng n
h.
References.
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