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result sql = Characteristics and transformation pathways of venlafaxine degradation during disinfection processes using free chlorine and chlorine dioxide.
Characteristics and transformation pathways of venlafaxine degradation during disinfection processes using free chlorine and chlorine dioxide.
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char = i;code = 105
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char = d;code = 100
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char = e;code = 101
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char = a;code = 97
char = f;code = 102
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char = x;code = 120
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char = e;code = 101
char = ;code = 32
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char = m;code = 109
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char = a;code = 97
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char = ;code = 32
char = i;code = 105
char = n;code = 110
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char = b;code = 98
char = o;code = 111
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char = ;code = 32
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char = s;code = 115
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char = f;code = 102
char = e;code = 101
char = c;code = 99
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char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
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char = o;code = 111
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char = s;code = 115
char = s;code = 115
char = e;code = 101
char = s;code = 115
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char = ;code = 32
char = S;code = 83
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char = x;code = 120
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
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char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
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char = ;code = 32
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char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = f;code = 102
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char = e;code = 101
char = d;code = 100
char = ;code = 32
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char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = v;code = 118
char = e;code = 101
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char = l;code = 108
char = a;code = 97
char = f;code = 102
char = a;code = 97
char = x;code = 120
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
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char = e;code = 101
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char = d;code = 100
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char = t;code = 116
char = i;code = 105
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char = n;code = 110
char = ;code = 32
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char = l;code = 108
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
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char = e;code = 101
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char = o;code = 111
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char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
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char = i;code = 105
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
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char = o;code = 111
char = m;code = 109
char = a;code = 97
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char = o;code = 111
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = y;code = 121
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
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char = a;code = 97
char = d;code = 100
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char = o;code = 111
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char = e;code = 101
char = -;code = 45
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char = i;code = 105
char = m;code = 109
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char = -;code = 45
char = o;code = 111
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char = -;code = 45
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char = g;code = 103
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char = t;code = 116
char = ;code = 32
char = m;code = 109
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char = s;code = 115
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char = e;code = 101
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char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = m;code = 109
char = a;code = 97
char = i;code = 105
char = n;code = 110
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 = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = l;code = 108
char = u;code = 117
char = d;code = 100
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char = d;code = 100
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char = y;code = 121
char = d;code = 100
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char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
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 = 46
char = <;code = 60
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char = <;code = 60
char = b;code = 98
char = r;code = 114
char = >;code = 62
result sql = Venlafaxine, a representative antidepressant, has been detected frequently in aquatic environments. The treatment of venlafaxine by free chlorine (NaOCl) and chlorine dioxide (ClO2) was investigated in this study. The effects of operational variables and the water matrix on venlafaxine degradation were evaluated. The transformation pathways of venlafaxine were also studied. The results indicated that venlafaxine was removed efficiently during disinfection processes, especially when reacted with ClO2. A higher dosage of disinfectant and mildly alkaline conditions (pH 9) enhanced the degradation of venlafaxine. The reactions were impacted when the tests were conducted in real water matrices, especially in secondary effluent. The presence of chloride and low concentrations of fulvic acid enhanced venlafaxine decomposition. The presence of Br- also accelerated the reaction between venlafaxine and NaOCl. However, NO2- inhibited venlafaxine removal in both disinfection processes. Six intermediates were identified during venlafaxine degradation by ultrahigh-performance liquid chromatography with quadrupole-time-of-flight mass spectrometry, and the main reactions included dehydration and demethylation.


Publication: Chemosphere 2021 Mar;276():130147.
Publication Date: Mar 2021
Study Author(s): Lv Juan J ; Ou Changyuan C ; Fu Mengya M ; Xu Zhiwei Z ;
Institution: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China. Electronic address: [email protected].
Shortcut link to this study:
Venlafaxine, a representative antidepressant, has been detected frequently in aquatic environments. The treatment of venlafaxine by free chlorine (NaOCl) and chlorine dioxide (ClO2) was investigated in this study. The effects of operational variables and the water matrix on venlafaxine degradation were evaluated. The transformation pathways of venlafaxine were also studied. The results indicated that venlafaxine was removed efficiently during disinfection processes, especially when reacted with ClO2. A higher dosage of disinfectant and mildly alkaline conditions (pH 9) enhanced the degradation of venlafaxine. The reactions were impacted when the tests were conducted in real water matrices, especially in secondary effluent. The presence of chloride and low concentrations of fulvic acid enhanced venlafaxine decomposition. The presence of Br- also accelerated the reaction between venlafaxine and NaOCl. However, NO2- inhibited venlafaxine removal in both disinfection processes. Six intermediates were identified during venlafaxine degradation by ultrahigh-performance liquid chromatography with quadrupole-time-of-flight mass spectrometry, and the main reactions included dehydration and demethylation.

PMID: 33714880

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