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Method for removing pentavalent antimony pollutant in water through electrochemical method

An electrochemical and pollutant technology, applied in the field of water treatment, can solve the problem of low removal rate of pentavalent antimony and achieve the effect of reducing oxidation potential

Inactive Publication Date: 2013-06-19
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that aluminum plates are used as electrodes to remove antimony pollutants by electrocoagulation. This method has a better effect on removing trivalent antimony pollutants, but the removal rate of pentavalent antimony is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the electrochemical reactor, the iron plate is the anode, the copper plate is the cathode, the distance between the iron plate electrode and the copper plate cathode is 1 cm, and the ratio of the area of ​​the plate to the volume of the water to be treated is 1 / 2 (m 2 / m 3 ). Adopt DC power supply for power supply, current density is 15A / m 2 . Formulated with Sb 3+ And Sb 5+ Of water to be treated, of which Sb 5+ And Sb 3+ The concentrations were 60μg / L and 20μg / L, and the pH of the water was adjusted to 3.5. The water to be treated is pumped into the electrochemical reactor, and the electrochemical reaction treatment time is 30 minutes. Under the above operating conditions, the Sb of the treated water 5+ And Sb 3+ The removal results are shown in Table 1. It can be seen that the antimony content in the effluent quality is lower than the limit of 5μg / L of antimony specified in my country's "Sanitary Standards for Drinking Water" (GB5749-2006).

[0028] Table 1: Electr...

Embodiment 2

[0032] In the electrochemical reactor, the iron plate is the anode, the nickel plate is the cathode, the distance between the iron plate electrode and the reduction electrode is 1.5 cm, and the ratio of the plate area to the volume of the water to be treated is 2 / 3 (m 2 / m 3 ). Adopt DC power supply for power supply, current density is 20A / m 2 . Sb in water to be treated 3+ And Sb 5+ The concentrations were 35μg / L and 12μg / L, respectively, and the pH of the water was adjusted to 5.6. Pump the water to be treated into the electrochemical reactor, and the electrochemical treatment time is 20 minutes. Under the above operating conditions, Sb in the water after treatment 5+ And Sb 3+ The removal results are shown in Table 2. It can be seen that the antimony content in the effluent quality is lower than the limit of 5μg / L of antimony specified in my country's "Sanitary Standards for Drinking Water" (GB5749-2006).

[0033] Table 2: Electrochemical treatment results of Example 2

[003...

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Abstract

The invention discloses a method for removing pentavalent antimony pollutant in water through an electrochemical method, and belongs to the technical field of water treatment. The method comprises the following steps: in an electrochemical reactor, serving an iron electrode as a positive electrode and serving a copper plate or a nickel plate as a negative electrode; adjusting a potential of hydrogen (pH) value of the to-be-processed water containing the pentavalent antimony pollutant to be 3-7, introducing the to-be-processed water into the electrochemical reactor, and adjusting the current density to be 10-30 amperes per square meter, the area of electrode plates and the size of the to-be-processed water to be 0.5-1 square meters / cubic meters, a space distance of the electrode plates to be 1-8cm, and electrochemical treatment time to be 10-40 minutes; and adopting a direct current power supply to supply power. The electrochemical method not only can effectively remove pentavalent antimony pollutant, but also can remove trivalent antimony pollutant.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to an electrochemical method for removing pentavalent antimony pollutants in water. Background technique [0002] In recent years, the problem of heavy metal pollution caused by industrial wastewater discharge has become increasingly prominent, and the effective removal of heavy metal ions in water has always been a research hotspot in the field of water treatment technology. The heavy metal antimony is toxic and carcinogenic to humans and organisms, and can cause diseases in the liver, skin, respiratory system, and cardiovascular system. Antimony poisoning has the characteristics of long-term latency. Antimony in antimony pollutants has two valence states: trivalent and pentavalent. Trivalent antimony is easy to remove from water, but pentavalent antimony is relatively electronegative and has high solubility in water, making it difficult to remove. Antimony in surfac...

Claims

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Application Information

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IPC IPC(8): C02F1/463C02F1/62
Inventor 赵旭曲久辉刘会娟胡承志兰华春刘锐平柏耀辉
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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