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

A method for removing arsenic in wastewater by combined use of compound agent and sludge adsorption material

A compound agent and sludge adsorption technology, applied in the field of water treatment, to achieve the effect of reducing the concentration of arsenic, simple process and low price

Active Publication Date: 2019-06-07
HEBEI UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the use of this sludge adsorption material to adsorb and remove arsenic in wastewater

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
  • A method for removing arsenic in wastewater by combined use of compound agent and sludge adsorption material
  • A method for removing arsenic in wastewater by combined use of compound agent and sludge adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a method for removing arsenic in waste water by using a compound agent and sludge adsorption material in combination includes the following steps: adding sodium arsenite to the water to prepare arsenic-containing waste water with an initial arsenic concentration of 10 mg / L, and the waste water is first passed through Oxidation pool reaction, adding compound agent to wastewater, the molar ratio of compound agent to arsenic is 5:1, stirring for 30 minutes, then HCl solution adjusts the pH value to 6-7 and then performs hydrolysis reaction, the effluent enters the adsorption pool, and then Add sludge adsorption material for adsorption for 60 minutes, the adsorption pool is a fixed bed, and the concentration of arsenic in the effluent is 0.04mg / L, which meets the discharge standard.

[0028] The compound agent is prepared by a method comprising the following steps: adding sodium hydroxide solution to a sodium hypochlorite solution having an availa...

Embodiment 2

[0031] A method for removing arsenic in waste water by combined use of compound agents and sludge adsorption materials, comprising the following steps: adding sodium arsenite and sodium arsenate to the water to form mixed arsenic waste water with an initial arsenic concentration of 12 mg / L, and the waste water is first After the reaction in the oxidation pool, add the composite agent to the wastewater, the molar ratio of compound agent to arsenic is 4:1, stir for 20min, then add HCl or H 2 SO 4 Adjust the pH value of the solution to 6 for hydrolysis reaction, the effluent enters the adsorption tank, and then add sludge adsorption materials for adsorption for 60 minutes. The adsorption tank is a fluidized bed, and the concentration of arsenic in the effluent is 0.05mg / L, less than 0.1mg / L, which meets the discharge standard .

[0032] The compound agent is prepared by a method comprising the following steps: adding potassium hydroxide solution to a calcium hypochlorite solutio...

Embodiment 3

[0035] A method for removing arsenic in waste water by combined use of a compound agent and a sludge adsorption material, comprising the following steps: adding monomethylarsenic acid (MMA) to water to prepare mixed arsenic waste water with an initial arsenic concentration of 5 mg / L, and the waste water is first After the reaction in the adsorption tank (the adsorption tank is a fluidized bed), the composite agent is added to the wastewater. The molar ratio of compound agent to arsenic is 5:1, stirred for 40 minutes, and then the pH value is adjusted to 6.5 for hydrolysis reaction, and the water is discharged. Enter the adsorption tank, and then add sludge adsorption materials for adsorption for 60 minutes. The adsorption tank is a fluidized bed, and the arsenic concentration in the effluent is 0.02mg / L, less than 0.1mg / L, which meets the discharge standard.

[0036] The compound agent is prepared by a method comprising the following steps: adding potassium hydroxide solution t...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for removing arsenic in wastewater with the combination of a compound medicine and a sludge adsorption material. The method comprises the following steps: adding the compound medicine into wastewater, stirring, adjusting the pH value, and adding the sludge adsorption material for adsorption to remove arsenic in the wastewater, wherein the mole ratio of the compound medicine to the wastewater is (1-50):1. By adopting the method for removing the arsenic in the wastewater with the combination of the compound medicine and the sludge adsorption material, the raw materials are low in price, an arsenic removal process is simple in procedure, economic in operation, convenient to manage and good in arsenic removal effect, the concentration of the arsenic in the wastewater can be effectively reduced, the content of the arsenic in effluent is less than 0.1 mg / L, and emission standards can be met.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for removing arsenic in waste water by combined use of a compound agent and a sludge adsorption material. Background technique [0002] Arsenic is a highly toxic element, which can enter human liver, kidney, bone, hair and other organs or tissues through food or skin contact and accumulate, damaging the digestive system and nervous system. Authoritative departments such as IARC have identified it as the first class of carcinogens. Arsenic is also genotoxic and is a priority pollutant for the World Health Organization (WHO). Arsenic in water comes from natural geological activities (such as volcanic eruptions, rock erosion, etc.), and human production activities (such as mining and smelting of arsenic compounds, large-scale application of arsenic-containing materials, development and smelting of non-ferrous metals, coal mining, etc.) burning, etc.). Among the...

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): C02F9/04B01J20/12B01J20/30
CPCB01J20/06B01J20/08B01J20/12B01J2220/4887C02F1/28C02F1/66C02F1/72C02F9/00C02F2101/103C02F2209/02C02F2209/06C02F2209/44
Inventor 张彦平韩非程恒卫李静李一兵
Owner HEBEI UNIV OF TECH