

2

nanomet mang trên silicagen, laterit, pyroluzit 


chuyên ngành: Hóa vô c60 44 25
GS.TS. 
12

Abstract:   


               

             
p


u

Keywords:   ;   ;   ; Asen; Amoni;   


Content
1. Giới thiệu chung về asen, amoni, chất hữu cơ
1.1. Asen



- 80%.

 



Tác hại của các hợp chất chứa nitơ đối với cơ thể con người

 
 

2

2
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), nitrat (NO
3
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
 

3
-


3
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

            


3
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
3
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

Ung thư tiềm tàng
  
- 


chúng.
 
 



.
1.3. Chất hữu cơ

  
ng 4 -.

      

BVTV)t

  

 
-gel, mix


4

2
O
2

2KMnO
4
+ 3H
2
O
2
 2KOH + 2MnO

+2H
2
O + 3O




2

.

O
2
10% ). Cho 6ml KMnO
4
        
KMnO
4

4



 


4
0.5M


4.3. Tổng hợp vật liệu M
1
, M
2
, M
3
 
 
 
4


bình 
2

-


2



3
COO)
2


2

Khí AsH
3


2


2
 


5.2. Xác định hàm lượng amoni bằng phương pháp so màu với thuốc thử Nessler
ng kim phn ng vi thuc th Nessler (

Cho 110


Xây dựng đường chuẩn xác định xanh metylen
 quang


6. Khảo sát khả năng hấp thụ asen, amoni, xanh meylen của vật liệu
6.1. Hấp phụ asen




 

2
.

6.2. Hấp phụ amoni
NH
4
+
o vào
NH
4
+

4h.
Sau 4h amoni
amoni 

nh  MnO
2

 MnO
2

 

Hình 2. Hạt MnO
2
kích thước nanomet phóng đại khác nhau

2

22 
2
 
  
7.2. Khảo sát cấu trúc bề mặt laterit và pyroluzit trước khi phủ

Hình 4.6: Bề mặt silicagen trước khi phủ Hình 4.7: Bề mặt pyroluzit trước khi phủ

2
trên siliagen thì hoàn


7.4. Khảo sát cấu trúc về mặt vật liệu M
2


2

M
2
 -


Hình 4.10. Bề mặt laterit biến tính nhiệt phủ MnO
2
kích thước nanomet phóng đại 50000
lần
T
2

MnO
2
 
    


Hình 4.11. Bề mặt pyroluzit biến tính nhiệt phủ MnO
2

3
 MnO
2


1

2

3

3

2

42,32% và 69,14% SiO
2
.
 MnO
2


MnO
2

 a= 4,38 Å
Faculty of Chemistry, HUS, VNU, D8 ADVANCE-Bruker - Mau quang Mn
00-005-0490 (D) - Quartz, low - alpha-SiO2 - Y: 69.14 % - d x by: 1. - WL: 1.5406 - Hexagonal - a 4.91300 - b 4.91300 - c 5.40500 - alpha 90.000 - beta 90.000 - gamma 120.000 - Primitive - P3121 (152) - 3
00-001-0799 (D) - Pyrolusite - MnO2 - Y: 42.32 % - d x by: 1. - WL: 1.5406 - Tetragonal - a 4.38000 - b 4.38000 - c 2.85000 - alpha 90.000 - beta 90.000 - gamma 90.000 - Primitive - P42/mnm (136) - 2 - 54.
File: Dung K55 mau quang Mn.raw - Type: Locked Coupled - Start: 20.000 ° - End: 70.000 ° - Step: 0.020 ° - Step time: 0.8 s - Temp.: 25 °C (Room) - Time Started: 12 s - 2-Theta: 20.000 ° - Theta: 10.000 ° -

cos
9,0





a X (nm)





=
180
.

FWHM
(rad)





 d=3.118A
0





8. Kết quả hấp phụ của các vật liệu
8.1. Hấp phụ tĩnh
Tổng hợp kết quả tải trọng hấp phụ các chất của các vật liệu:

asen
mg/g

mg/g

mg/g
M
1
22.22
5.35
6.71
M
2

47.62
9.18
6.9
M
3

43.48
11.62
6.8

, HAsO
4
2-
(pK
a1
= 2,19, pK
a2
=6,94, pK
a3
=11,5)

 
2
nano là cao.

2


lên As (V). 

- 
-
trong
           
2
AsO
4
(    
HAsO
4

1. 
2. 
2

Silicagen, pyroluzit.
3.                   

2

3
, 6,9 mg

3
.
4.   


References
Tiếng Việt
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Suy nghĩ về việc đào tạo công nghệ nano tại Đại học Bách Khoa Hà Nội

2. Nghiên cứu cấu trúc và tính chất điện hóa của vật liệu
MnO
2
bằng phản ứng điện phân, - 

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