Removemt and conventional methods used in the trea

Introduction: remove MT can react rapidly with various metal ions in wastewater at room temperature, such as hg2+, cd2+, cu2+, pb2+, mn2+, ni2+, zn2+, cr3+ which were put into use last month, fe2+, etc. to generate water-insoluble chelating salts and form flocculent precipitation, so as to achieve the purpose of removing heavy metal ions. It has the characteristics of coarse flocs, fast sedimentation, fast dehydration, easy post-treatment, less sludge and no secondary pollution. It can be widely used in the treatment of heavy metal ion containing wastewater in electroplating industry, electronic industry, petrochemical industry, metal processing industry, waste incineration treatment, power plant flue gas washing and other industries. The purpose of this test is to compare the effect of remove MT and conventional methods on the removal of heavy metal ions

the key type II sample is a rectangular strip sample with equal cross-section. At present, the key is to put forward a practical solution: electroplating wastewater flocculation test heavy metals

1 Test content

the comparison test of electroplating wastewater treatment with remove MT and conventional NaOH was carried out. The test water samples were randomly sampled on site. After the test, the optimal dosage and treatment steps were obtained respectively, and the test results were compared

2. Raw water quality

after detection, the raw water quality indicators are as follows: (unit: mg/l)

② add about 11.5 ml of 10% sodium hydroxide and adjust the pH to about 6.5

③ add 5%remove MT (diluted concentration is 5%) 2.5 ml and stir for 5 min

④ add 0.3 ml of 0.1% polyacrylamide, stir quickly for 0.5 min, and stir slowly for 1 min

⑤ stand for 3 minutes, take the supernatant and filter it, and detect the residual concentration of heavy metal ions in the treated water

note: the ORP potential drops to 60 mV (from + 180 MV to 120 MV) at the end point of the remove MT reaction for removing heavy metal ions determined by the test

4.2 use naoh

① take 1L of wastewater

excellent radiation resistance ② add about 16.78 ml of 10% sodium hydroxide and adjust the pH to about 10.0

③ under ph=9.5, stir for 10 min

④ add 1.0 ml of 0.1% polyacrylamide, stir quickly for 0.5 min, and stir slowly for 1 min

⑤ stand for 3 min, filter the supernatant, add 3.75ml of 10% sulfuric acid solution, and adjust the pH to 7.5

⑥ detect the residual concentration of heavy metal ions in water after NaOH treatment

5. Test results

5.1 comparison of heavy metal ion concentration in treated water

unit: mg/l