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char = H;code = 72
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char = .;code = 46
result sql = Kinetics of degradation of allura red, ponceau 4R and carmosine dyes with potassium ferrioxalate complex in the presence of H(2)O(2).
Kinetics of degradation of allura red, ponceau 4R and carmosine dyes with potassium ferrioxalate complex in the presence of H(2)O(2).
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char = o;code = 111
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char = a;code = 97
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char = y;code = 121
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char = a;code = 97
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char = e;code = 101
char = s;code = 115
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char = w;code = 119
char = i;code = 105
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char = a;code = 97
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char = H;code = 72
char = ;code = 32
char = c;code = 99
char = o;code = 111
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char = c;code = 99
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
char = I;code = 73
char = s;code = 115
char = o;code = 111
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
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char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = g;code = 103
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = u;code = 117
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = (;code = 40
char = (;code = 40
char = );code = 41
char = O;code = 79
char = H;code = 72
char = );code = 41
char = .;code = 46
char = ;code = 32
char = O;code = 79
char = x;code = 120
char = a;code = 97
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = f;code = 102
char = i;code = 105
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = m;code = 109
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = f;code = 102
char = i;code = 105
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = The degradation of title dyes with ferrioxalate and H(2)O(2) couple has been investigated spectrophotometrically. In the absence of either one of the oxidizing agents no degradation occurred. The reaction rate was proportional to moderate concentrations of the dye and H(2)O(2). At high concentration of the dye and H(2)O(2) the reaction rate decreased. With regard to the concentration of the ferrioxalate complex the rate of reaction increased even over a wide range of complex concentration. Degradation of dyes does not occur in acidic medium. It is slow in neutral but thoroughly fast in alkaline medium. The reaction rate reaches a maximum value at pH 11.5. This behavior was again observed if HCl or NaOH were added. With HCl the reaction rate decreases with increasing acid concentration but greatly increases with NaOH concentration. Isopropanol showed inhibiting effect due to scavenging the in situ generated hydroxyl radical (()OH). Oxalate ion enhanced the rate, confirming an outer sphere mechanism. The activation parameters of the reaction are estimated and a possible mechanism is proposed. The mechanism is well confirmed with data simulation procedure.

Publication: Chemosphere 2009 Aug ;76(8)::1088-93. :doi: 10.1016/j.chemosphere.2009.04.033.
Publication Date: 2009 Aug
Study Author(s): Salem, Mohamed A;Abdel-Halim, Shaker T;El-Sawy, Abd El-Hamid M;Zaki, Ahmed B;
Institution: Department of Chemistry, Tanta University, Egypt. [email protected]
Shortcut link to this study:
The degradation of title dyes with ferrioxalate and H(2)O(2) couple has been investigated spectrophotometrically. In the absence of either one of the oxidizing agents no degradation occurred. The reaction rate was proportional to moderate concentrations of the dye and H(2)O(2). At high concentration of the dye and H(2)O(2) the reaction rate decreased. With regard to the concentration of the ferrioxalate complex the rate of reaction increased even over a wide range of complex concentration. Degradation of dyes does not occur in acidic medium. It is slow in neutral but thoroughly fast in alkaline medium. The reaction rate reaches a maximum value at pH 11.5. This behavior was again observed if HCl or NaOH were added. With HCl the reaction rate decreases with increasing acid concentration but greatly increases with NaOH concentration. Isopropanol showed inhibiting effect due to scavenging the in situ generated hydroxyl radical (()OH). Oxalate ion enhanced the rate, confirming an outer sphere mechanism. The activation parameters of the reaction are estimated and a possible mechanism is proposed. The mechanism is well confirmed with data simulation procedure.
PMID: 19520415

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