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Method for treating high-arsenic waste acid by using modified coal cinder adsorbent

An adsorbent, arsenic polluted acid technology, applied in adsorption water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc. The effect of processing meaning, reducing acidity

Inactive Publication Date: 2021-07-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Portland cement method is often used in the curing method, but the cost of this method is relatively high, which is not conducive to large-scale use by enterprises

Method used

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  • Method for treating high-arsenic waste acid by using modified coal cinder adsorbent
  • Method for treating high-arsenic waste acid by using modified coal cinder adsorbent
  • Method for treating high-arsenic waste acid by using modified coal cinder adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for treating high-arsenic polluted acid with a modified coal slag adsorbent, the specific steps are as follows:

[0027] (1) H 2 o 2 The solution was added to high-arsenic polluted acid, and reacted for 4 hours at a temperature of 80°C and a stirring rate of 180r / min to obtain solution A; where H 2 o 2 The concentration of the solution is 30%, H 2 o 2 The volume ratio of the solution to the high-arsenic polluted acid is 1:4-6;

[0028] (2) Add 50g honeycomb coal slag powder and 10g NaOH to 500ml deionized water to obtain solution B, stir and react at 25°C for 2-3 hours, separate solid and liquid to obtain modified coal slag and filtrate, and dry the modified coal slag for 12 hours deal with.

[0029] (3) Add the prepared modified cinder powder into 50ml of solution A in step (1), shake in a constant temperature oscillator at a temperature of 25°C at a shaking speed of 180r / min for 24h, and separate solid and liquid to obtain arsenic-containing solid The ...

Embodiment 2

[0034] A method for treating high-arsenic polluted acid with a modified coal slag adsorbent, the specific steps are as follows:

[0035] (1) H 2 o 2 The solution was added to the high-arsenic polluted acid, and reacted for 4.5 hours at a temperature of 81°C and a stirring rate of 180r / min to obtain solution A; the concentration of the hydrogen peroxide solution was 30%, and the hydrogen peroxide solution and the high-arsenic polluted acid The volume ratio is 1:5;

[0036] (2) Add 50g honeycomb coal slag powder and 10g NaOH to 500ml deionized water to obtain solution B, stir and react at 25°C for 2-3 hours, separate solid and liquid to obtain modified coal slag and filtrate, and dry the modified coal slag for 12 hours deal with.

[0037] (3) Add 8g of the prepared modified cinder powder to 50ml of solution A in step (1), and shake and react in a constant temperature oscillator at a temperature of 25°C at a shaking speed of 180r / min, and separate solid and liquid to obtain ar...

Embodiment 3

[0042] A method for treating high-arsenic polluted acid with a modified coal slag adsorbent, the specific steps are as follows:

[0043] (1) H 2 o 2The solution was added to high-arsenic polluted acid, and reacted for 5 hours at a temperature of 82°C and a stirring rate of 180r / min to obtain solution A; where H 2 o 2 The concentration of the solution is 30%, H 2 o 2 The volume ratio of solution to high arsenic polluted acid is 1:6;

[0044] (2) Add 50g honeycomb coal slag powder and 10g NaOH to 500ml deionized water to obtain solution B, stir and react at 25°C for 2-3 hours, separate solid and liquid to obtain modified coal slag and filtrate, and dry the modified coal slag for 12 hours deal with.

[0045] (3) Add 8g of modified coal slag powder into 50mL solution A of step (1), and shake at a speed of 180r / min in a constant temperature oscillator with a temperature of 25°C, 40°C, 60°C, 80°C, and 90°C Shaking reaction for 24 hours, solid-liquid separation to obtain arsen...

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Abstract

The invention discloses a method for treating high-arsenic waste acid by using a modified coal cinder adsorbent, which belongs to the technical field of heavy metal pollution treatment. The method comprises the following steps of adding an H2O2 solution into high-arsenic waste acid, and reacting for 4-5 hours at the temperature of 80-82 DEG C under a stirring condition to obtain a solution A, adding honeycomb briquette slag powder and NaOH into deionized water to obtain a solution B, carrying out stirring reaction for 2-3 hours at the temperature of 25 DEG C, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag for 12 hours. According to the method, arsenic in the high-arsenic waste acid is removed through the modified coal cinder powder, interference of various ions in the solution is overcome, the arsenic removal effect is achieved, the earlier-stage investment cost is reduced, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to a method for treating high-arsenic polluted acid with a modified coal slag adsorbent, and belongs to the technical field of heavy metal pollution control. Background technique [0002] Arsenic can form highly toxic compounds. Arsenic can be absorbed by the human body through the respiratory tract, skin and digestive tract, causing neurasthenia syndrome, polyneuropathy, and skin and mucous membrane lesions. Arsenic's inorganic compounds can cause lung cancer and skin cancer. After the treatment of arsenic-containing wastewater, most of the harmful substances such as arsenic are transferred to the sludge. Therefore, the research on the safe treatment and disposal of arsenic-containing sludge has important practical significance. [0003] At present, the treatment methods of arsenic-containing sludge include wet treatment, fire treatment and solidification treatment and other methods. Wet treatment has low energy consumption, low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/10B01J20/30C02F101/10
CPCB01J20/041B01J20/08B01J20/06B01J20/103C02F1/288C02F1/58C02F2101/103
Inventor 祁先进杨妮娜段孝旭闫桂枝
Owner KUNMING UNIV OF SCI & TECH
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