Grafting of acrylic acid onto flax fibers using Mn(IV)-citric acid redox system

2006 ◽  
Vol 102 (3) ◽  
pp. 3028-3036 ◽  
Author(s):  
M. K. Zahran ◽  
M. F. Rehan
Keyword(s):  
Citric Acid ◽  
Acrylic Acid ◽  
Redox System ◽  
Flax Fibers

scholarly journals The Effect of Crosslinker and Pore Generated on Selective Adsorbent (Cu2+) based on Grafting of Acrylic Acid onto Cassava Starch

2015 ◽  
Vol 9 (7) ◽  
pp. 37
Author(s):  
Judy R. B. Witono ◽  
Henrietta Henrietta ◽  
Y. I. P Arry Miryanti
Keyword(s):  
Heavy Metal ◽  
Citric Acid ◽  
Acrylic Acid ◽  
Water Absorption ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Cassava Starch ◽  
Metal Adsorption ◽  
Acid Modification ◽  
Release Process

The technology development in many industries nowadays, such as electronic industry produces heavy metal wastes which may pollute our environment. The use of adsorbent as a heavy metal removal from soil and water is one of the efficient process which can be considered to be used. In addition the release of the adsorbate becomes an important way as well because usually those heavy metals still have a high value. The objective of this research is to develop adsorbent based on cassava starch. So, the release process will become easier and will not produce another waste. The adsorbent was produced through the grafting of acrylic acid onto cassava starch by using Fenton initiator. To construct a stable 3-D network, the crosslinker (CL) N,N’- methylenebisacrylamide was added. The variable observed were the amount of CL added (0.5%; 1.5%; 2.5% and 3.5%) and the treatment of generating more pores on starch copolymer. The treatments on starch copolymer observed were single freezing, second freezing, and citric acid modification and carbonization methods. Analysis performed on the adsorbent was % add-on, water absorption and metal adsorption (especially Cu2+ ion) capacity. The result showed that the used of 2.5% CL produced the highest add-on (47.66 %), the highest water absorption capacity and the highest metal adsorption capacity (0.29g Cu2+/g adsorbent) The citric acid modification also produced the highest pores on the adsorbent.

Sonochemical polymerization of acrylic acid and acrylamide in the presence of a new redox system? A comparative study

2003 ◽  
Vol 89 (13) ◽  
pp. 3685-3692 ◽  
Author(s):  
R. Anbarasan ◽  
J. Jayaseharan ◽  
M. Sudha ◽  
A. Gopalan
Keyword(s):  
Acrylic Acid ◽  
Comparative Study ◽  
Redox System ◽  
System A

Removal of Chromium from Aqueous Solution by Polymer Enhanced Ultrafiltration Using Copolymer of Maleic Acid and Acrylic Acid

2013 ◽  
Vol 668 ◽  
pp. 241-245 ◽  
Author(s):  
Lian Jun Mao ◽  
Yong Qian Wang ◽  
Yun Ren Qiu
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Acrylic Acid ◽  
Maleic Acid ◽  
Complete Removal ◽  
Polyvinyl Butyral ◽  
Complexing Agent ◽  
Membrane Effects ◽  
Polymer Metal ◽  
Added Salt

Polymer enhanced ultrafiltration was used to remove Cr(III) from aqueous solution by using complexing agent, copolymer of maleic acid and acrylic acid (PMA-100), and polyvinyl butyral (PVB) ultrafiltration membrane. Effects of mass ratio of polymer/metal (P/M), pH, added salt and citric acid on the rejection of Cr(III) were investigated. Results show that the rejection of Cr(III) can be 97.2% for 10.0 mg/L aqueous solution at P/M 6.0 and pH 5.0, and the a complete removal occurs when pH is not smaller than 6.0, but the membrane will be fouled due to the formation of hydroxide precipitation at pH 6.0. The addition of the citric acid leads to a significant decrease of rejection while the added salt (up to 0.1M) has little effect on the rejection of Cr(III).

Polymerization of Methacrylamide Initiated by Ceric Ion-Citric Acid Redox System

1985 ◽  
Vol 22 (8) ◽  
pp. 1167-1175 ◽  
Author(s):  
G. S. Misra ◽  
P. S. Bassi ◽  
S. L. Abrol
Keyword(s):  
Citric Acid ◽  
Redox System ◽  
Ceric Ion
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