Method for removing aniline, chromium and antimony in wastewater
A wastewater and aniline technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of difficult to meet discharge standards, complex wastewater components, etc., and achieve the effect of less dosage and economical removal rate
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Embodiment 1
[0044] A printing and dyeing wastewater, wherein the content of aniline is 2.3 mg / L, the content of chromium (VI) is 1.5 mg / L, and the content of antimony is 0.5 mg / L.
[0045] A method for removing aniline, chromium and antimony in wastewater, comprising the following steps:
[0046] S1: Take 500mL of the above waste water, filter out the insoluble matter, use H 2 SO 4 solution and NaOH solution to adjust the pH value to 4, add sodium persulfate (Na 2 S 2 O 8 ) to sodium persulfate (Na 2 S 2 O 8 ) concentration is 5mmol / L, mix well;
[0047]S2: Add 1 g of MIEX magnetic resin (commercially available MIEX resin provided by Orica Company, 150-180 μm) to the above-mentioned waste water, stir for 1 h, adjust the pH value to 9 with NaOH, stir evenly and let stand for 40 min;
[0048] S3: The supernatant is separated, and the precipitate is recovered.
[0049] According to the method provided by GB11889-1989 "N-(1-naphthyl) ethylenediamine azo spectrophotometric method for ...
Embodiment 2
[0053] A printing and dyeing wastewater, wherein the content of aniline is 3.5 mg / L, the content of chromium (VI) is 2.7 mg / L, and the content of antimony is 0.9 mg / L.
[0054] A method for removing aniline, chromium and antimony in wastewater, comprising the following steps:
[0055] S1: Take 500mL of the above waste water, filter out the insoluble matter, use H 2 SO 4 solution and NaOH solution to adjust the pH value to 3, add sodium persulfate (Na 2 S 2 O 8 ) to sodium persulfate (Na 2 S 2 O 8 ) concentration is 5mmol / L, mix well;
[0056] S2: add 1.2 g of MIEX magnetic resin (commercially available MIEX resin provided by Orica company, 150-180 μm) to the above-mentioned waste water, stir for 1.5 h, adjust the pH value to 10 with NaOH, stir evenly and let stand for 45 min;
[0057] S3: The supernatant is separated, and the precipitate is recovered.
[0058] In the supernatant liquid, according to the method provided by GB11889-1989 "Determination of anilines in wat...
Embodiment 3
[0062] A printing and dyeing wastewater, wherein the content of aniline is 4.3 mg / L, the content of chromium (VI) is 3.8 mg / L, and the content of antimony is 1.1 mg / L.
[0063] A method for removing aniline, chromium and antimony in wastewater, comprising the following steps:
[0064] S1: Take 500mL of the above waste water, filter out the insoluble matter, use H 2 SO 4 solution and NaOH solution to adjust the pH value to 3, add sodium persulfate (Na 2 S 2 O 8 ) to sodium persulfate (Na 2 S 2 O 8 ) concentration is 10mmol / L, mix well;
[0065] S2: add 1.8g of MIEX magnetic resin (commercially available Orica company provides MIEX resin, 150-180μm) to the above waste water, stir for 1.5h, adjust the pH value to 9 with NaOH, stir evenly and let stand for 50min;
[0066] S3: The supernatant is separated, and the precipitate is recovered.
[0067] According to the method provided by GB11889-1989 "Determination of Anilines in Water Quality N-(1-naphthyl)ethylenediamineazo ...
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