Method of removing copper ions from effluents

FIELD: process engineering.

SUBSTANCE: invention may be used in sorption cleaning of effluents. In compliance with proposed method, effluents are processed by sorbent including minced wastes of aluminate hydrate concrete. Cleaning is performed by filtration through sorbent with layer thickness of 0.05-0.06.

EFFECT: higher efficiency, reduced consumption of sorbent, accelerated process.

2 tbl, 1 ex

 

The invention relates to water treatment technology, in particular to the treatment of wastewater from copper ion sorption.

A known method of purification of wastewater from copper ion, including the processing of sorbents, which use waste shredded non-autoclave foam concrete, and cleaning is carried out by filtration through a sorbent layer thickness of 0.1-0.2 m (RU # 2327647, C02F 1/28, C02F 1/64, 27.06.2008).

The disadvantages of this method are the low filtration rate and a relatively large flow rate of the sorbent.

The closest in technical essence to the claimed technical solution is chosen for the prototype of the method of purification of waste water from the copper ion, which is based on filtration through a bed of the sorbent layer thickness of 0.075-0,09 m, and the sorbent used waste crushed foamed gypsum (RU # 2360868, C02F 1/28, B01J 20/28, 10.07.2009).

The disadvantage of this method is the low cleaning efficiency, high consumption of sorbent and a lower filtration rate, leading to increased treatment time.

The challenge which seeks the invention is to improve the efficiency of wastewater treatment on copper ion, reducing the height of the layer of sorbent in the treatment of wastewater from copper ion, which leads to its economy, and increase the rate of filtration, reducing cleaning time.

the left task in the proposed solution is achieved by a method of wastewater treatment of copper ions, including the processing of the sorbent, the sorbent use shredded waste hydroalumination concrete, and cleaning is carried out by filtration through a sorbent layer thickness 0,05-0,06 m

SPECIFIC EXAMPLE

The proposed method is as follows. As filter material use shredded waste hydroalumination concrete.

Hydroalumination concrete is a complex composite material, obtained by the interaction of aluminate cement with water. The chemical composition of aluminate cement are shown in table 1.

Table 1
Oxide content, wt.%
SiO2Al2O3Fe2O3FeOCaOMgOPCT
Aluminate cementto 8.4140,869,3840,680,23 0,44

For sorption was used shredded waste hydroalumination concrete with a grain size 0,114-0,315 mm, which corresponds to the requirements for filter materials. Filtration was carried out in a column with a diameter of 30 mm, height 400 mm

Filtration was subjected to waste water containing copper ions. The thickness of the layer of sorbent was 0.05 and 0.06 m, mass of the sorbent was 15-20 g, the rate of filtrate was taken equal to 5 m/h, which corresponds to the rate of filtration in real filters in wastewater treatment plants. Sampling was conducted at the end of the time of filtration. Was determined the concentration of copper ions. Control over the degree of purification of the water from the copper ions was carried out by atomic absorption spectrometer.

Table 2 shows the results for the quality of wastewater treatment of copper ions with the use of shredded waste hydroalumination concrete with a grain size 0,114-0,315 mm

Table 2
Used to clean materialThe height of the layer of sorbent, mInitial concentration of copper ions, mg/lThe final concentration of copper ions, mg/lFiltration rate, m/h
Features
Crushed hydroalumination concrete0,0514.4V05
0,05514.4V05
0,0614.4V05
The placeholder
Crushed foamed gypsum0,0751,5004

From table 2 it follows that the advantage of using shredded waste hydroalumination concrete as a sorbent is the ability of wastewater treatment of copper ions with higher initial concentration compared with the prototype and the possibility of replacing the foamed gypsum on waste hydroalumination concrete. An additional advantage is the increase in filtration rate at 1 m/h and the decrease in the height of the layer of sorbent on 0,015-0,025 m compared to the prototype.

The method of purification of wastewater from copper ion includes treatment with an adsorbent, characterized in that the sorbent use shredded waste hydro is luminator concrete, and cleaning is carried out by filtration through a sorbent layer thickness 0,05-0,06 m



 

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