Unlock instant, AI-driven research and patent intelligence for your innovation.

Modified pumice for purifying heavy metal sewage and preparation method and application of modified pumice

A technology for heavy metals and heavy metal ions, applied in the field of water pollution control, can solve problems such as inability to meet discharge standards, high energy consumption, secondary pollution, etc., and achieve the effects of easy recovery and recycling, convenient preparation process operation, and good adsorption performance.

Inactive Publication Date: 2013-12-25
TIANJIN URBAN CONSTR COLLEGE +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above treatment methods have the following problems: the chemical method, the biggest disadvantage, may cause secondary pollution with the addition of chemicals during the treatment process, and with the improvement of discharge standards, it is difficult for the chemical method to reach the standard.
Evaporation and concentration method: Due to high energy consumption, high operating costs, and the problem of impurity interference with resource recovery remains to be studied, so that the application is limited
Electrolysis method: the disadvantage of this method is that it is not suitable for the treatment of metal wastewater with low concentration, and it consumes a lot of electricity and costs high
Ion exchange method: Due to the strong selectivity of the ion exchanger, the manufacture is complicated, the cost is high, the consumption of the regenerant is large, and the secondary pollution is caused, so the application is greatly restricted
Adsorption method: The adsorption method using different adsorbents has problems such as large investment, high operating cost, and large amount of sludge generated to varying degrees, and it is difficult to discharge the treated water up to the standard
Membrane separation method: Only using membrane technology will bring concentrated water problems and cannot solve the problem of discharge standards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified pumice for purifying heavy metal sewage and preparation method and application of modified pumice
  • Modified pumice for purifying heavy metal sewage and preparation method and application of modified pumice
  • Modified pumice for purifying heavy metal sewage and preparation method and application of modified pumice

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation method of modified pumice used for purifying heavy metal sewage in the present invention comprises the following steps: using pumice as raw material, processing into irregular granular Φ=16-100 mesh through beneficiation, crushing, screening and ball milling, and then placing it in an oven, Drying at 90℃-110℃ for 8-10h, calcining at 600℃-800℃ for 1.0h-2.5h, quenching in tap water for 5min-15min, draining, drying at 90℃-110℃ for 10-14h, Ready-to-go product.

[0022] The calcination temperature of the muffle furnace is 700°C, and the calcination time is 1.5h.

[0023] Quenching time in tap water 10min.

[0024] The drying conditions are: the drying conditions are: the first drying is drying at 100°C for 10 hours; the second drying is drying at 100°C for 12 hours.

[0025] The irregular granular Φ=16-20 mesh.

[0026] The modified pumice used for purifying heavy metal sewage prepared by the above preparation method.

[0027] The use of the modified pumi...

Embodiment 1

[0031] A modified pumice material used for purifying heavy metal ions in water treatment. It uses pumice as raw material, and is processed into irregular granular shapes through a series of processes such as crushing, screening, ball milling, etc. Bake at 100°C for 10h, dry, set the muffle furnace temperature to 600°C, calcination time for 2.5h, then quench with tap water for 5min, drain, and bake at 100°C for 12h, the small granular pumice is the finished product.

Embodiment 2

[0033] A modified pumice material used for purifying heavy metal ions in water treatment. Pumice is selected as raw material, and is processed into irregular granular shapes through a series of processes such as crushing, screening, ball milling, etc. Bake at 90℃ for 8h, dry, set the muffle furnace temperature at 700℃, calcining time for 1.5h, then quench with tap water for 10min, drain, dry in oven at 90℃ for 14h, small granular pumice is the finished product.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses modified pumice for purifying heavy metal sewage and a preparation method and application of the modified pumice. The preparation method comprises the following steps of: crushing, sieving and ball-milling pumice serving as a raw material into granules with irregular shapes, the diameters phi of 16 to 100 meshes and required size, drying in an oven, calcining in a muffle furnace, quenching with tap water, draining, drying in the oven, and thus obtaining small granular pumice, namely a finished product. Heavy metal ions Cu<2+>, Pb<2+>, Zn<2+>, Cd<2+>, Cr<2+>, Hg<2+> and As<5+> in the water are removed by adopting the modified pumice through an adsorption-ion exchange effect, so that the aim of purifying the heavy metal waste water is fulfilled. The cost of the raw material is low, the processing technology is simple, the effect of removing heavy metal monomers and mixed heavy metal by using the modified pumice is good, and the modified pumice has a quick effect and does not produce secondary pollution.

Description

technical field [0001] The invention belongs to the field of water pollution control, and relates to a modified pumice stone used for purifying heavy metal sewage and a preparation method and application thereof. Background technique [0002] With the development of economy and the acceleration of urbanization, the problem of urban water pollution is becoming more and more serious. Heavy metal pollution has quietly entered our daily life. Such as chromium residue pollution, rice cadmium crisis, lead pollution incidents, etc., these heavy metal pollution seriously endanger biological survival and human health. [0003] At present, the treatment of heavy metals mainly includes chemical method, evaporation concentration method, electrolysis method, ion exchange method, adsorption method and membrane separation method. Among them, chemical treatment of heavy metal wastewater can remove a variety of gold ions at one time. Evaporation concentration method is a treatment method f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F1/62
Inventor 王银叶张宏伟
Owner TIANJIN URBAN CONSTR COLLEGE