Method for purifying arsenic-containing wastewater
A waste water and arsenic removal technology, which is applied in the direction of chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of unfavorable large-scale use of enterprises, low energy consumption and high cost of wet treatment, and achieve deep arsenic removal Effects of treatment, reduction of arsenic ion concentration, and enhancement of stability
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Embodiment 1
[0024] Embodiment 1: a kind of purification method of arsenic-containing waste water, concrete steps are as follows:
[0025] (1) H 2 o 2 The solution was added to the arsenic-containing wastewater, and reacted for 4 hours at a temperature of 25°C and a stirring rate of 150r / min to obtain solution A; where H 2 o 2 The mass concentration of the solution is 30%, H 2 o 2 The volume ratio of the solution to the high-arsenic polluted acid is 1:4;
[0026] (2) Calcining honeycomb slag at high temperature to obtain calcined slag, wherein the calcination temperatures are 300, 500, 700, 800, and 900°C respectively, the calcination time is 2h, and the heating rate is 5°C / min;
[0027] (3) Mix ferric hydroxide with the calcined slag of step (2) according to the molar ratio of Fe and Al of 1:20, put them into deionized water, stir and react at a temperature of 25°C for 6h, filter and dry the filter residue Heat and dry at 60°C in an oven for 12 hours to obtain the arsenic-removed co...
Embodiment 2
[0032] Embodiment 2: a kind of purification method of arsenic-containing waste water, concrete steps are as follows:
[0033] (1) H 2 o 2 The solution is added to the arsenic-containing wastewater, and reacted for 4-5 hours at a temperature of 25°C and a stirring rate of 150r / min to obtain a solution A; wherein H 2 o 2 The concentration of the solution is 30%, H 2 o 2 The volume ratio of the solution to the high-arsenic polluted acid is 1:5;
[0034] (2) Calcining honeycomb cinder at high temperature to obtain calcined slag, wherein the temperature is 700°C, the calcining time is 2h, and the heating rate is 5°C / min;
[0035] (3) ferric hydroxide and step (2) calcined slag are put into deionized water by Fe and Al molar ratio 1:12,1:15,1:20,1:30,1:60 ratio, at temperature Stir and react at 25°C for 6 hours, and after filtration, heat and dry the filter residue in a drying oven at 60°C for 12 hours to obtain the arsenic-removed composite material;
[0036] (4) Add the ars...
Embodiment 3
[0040] Embodiment 3: a kind of purification method of arsenic-containing waste water, concrete steps are as follows:
[0041] (1) H 2 o 2 The solution is added to the arsenic-containing wastewater, and reacted for 4-5 hours at a temperature of 25°C and a stirring rate of 150r / min to obtain a solution A; wherein H 2 o 2 The concentration of the solution is 30%, H2 o 2 The volume ratio of the solution to the high-arsenic polluted acid is 1:6;
[0042] (2) Calcining honeycomb cinder at high temperature to obtain calcined slag, wherein the calcining temperature is 700°C, the calcining time is 2h, and the heating rate is 5°C / min;
[0043] (3) Mix ferric hydroxide with the calcined slag of step (2) according to the molar ratio of Fe and Al of 1:20, put them into deionized water, stir at 25°C for 6 hours, filter and put the filter residue in a drying box Heat and dry at 60°C for 12 hours to obtain the arsenic-removed composite material;
[0044] (4) Add the arsenic-removing com...
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