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Method for simultaneously purifying organic arsenic and inorganic arsenic combined pollution wastewater

A compound pollution and inorganic arsenic technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of microorganisms being easily affected by environmental conditions, high requirements for operating technology, and long treatment cycles. Achieve the effects of easy industrialization, good arsenic fixation effect and simple method

Active Publication Date: 2020-06-19
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of ion exchange resin is relatively high, the amount of input is relatively large, and the raw water needs to be pretreated before feeding, which may cause secondary pollution and other disadvantages, the scope of application is limited, and it is not suitable for large-scale sewage treatment; biological method Although the cost is low and there is no secondary pollution, the treatment cycle is long and microorganisms are easily affected by environmental conditions; the operation of electrochemistry involves multiple disciplines such as chemistry, physics, electricity, and surface science, and the mechanism is relatively complicated. The equipment is relatively expensive and has relatively high requirements for operating technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At first carry out the preparation of adsorbent according to aforementioned content of the invention, specifically:

[0037] (1) 1000 kg of sorghum stalks are placed in a pulverizer for pulverization, and after pulverization, sorghum stalk powder with a particle size of 60-100 meshes is selected as a raw material for preparation;

[0038] (2) Put the sorghum straw powder in the electric furnace equipment, fill the electric furnace with N 2 And after the temperature in the furnace is raised to 500°C, continue heating, keep the temperature in the furnace constant, dry distillation for 1 hour, and prepare sorghum stalk biochar powder;

[0039] (3) With sorghum stalk biochar powder as the solute, the sorghum stalk biochar powder is added to the FeCl concentration of 0.05mol / L at a ratio of 7.5% by mass percentage. 3 In the solution, a sorghum stalk biochar powder solution is prepared.

[0040] (4) Disperse the prepared sorghum stalk biochar powder solution by ultrasonic vib...

Embodiment 2

[0051] The above-mentioned adsorbent is also applicable to the adsorption test again, wherein: 3 Sorghum straw biochar powder adsorbent was added to the mixed solution of As(Ⅲ), As(Ⅴ) and ROX with a concentration of 100mg / L, and the mass concentration of the adsorbent was 2.0kg / m 3 , adjust the pH of the solution to 5.0, place it in a shaker with a rotation speed of 150r / min for 48h, and control the temperature at 30°C.

[0052] After inspection, the removal rates of As(Ⅲ) were 48.50%, that of As(Ⅴ) was 97.50%, and that of ROX were 66.78%. The effect is still very good.

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Abstract

A method for simultaneously purifying organic arsenic and inorganic arsenic combined pollution wastewater belongs to the technical field of sewage treatment, and is characterized in that sorghum strawis used as a raw material, carbonization and Fe-based modification treatment are carried out to prepare a sorghum straw biochar powder adsorbent, and the adsorbent is used for treating combined pollution wastewater containing As (III), As (V) and ROX at the same time. Through inspection, the removal rate of As (III) is 48.50%, the removal rate of As (V) is 97.50%, the removal rate of ROX is 66.78%, the removal rate of harmful substances such as organic arsenic and inorganic arsenic is high, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a preparation method of an Fe-based modified adsorbent and a method for rapidly purifying waste water polluted by organic arsenic and inorganic arsenic by using the adsorbent. Background technique [0002] Arsenic is a highly toxic trace element that seriously endangers human health and ecological balance. Organoarsenic is a class of metal-organic compounds formed by arsenic and certain organic functional groups. Due to its special structural characteristics, some organic arsenic can not only promote biological growth and increase production, but also have the characteristics of not combining with biological tissues and being directly excreted from the body through feces. It has become the main component of livestock feed additives. Due to the limitation of the economic system, manure from livestock and poultry breeding industry is widely used as fertilizer in agricultural...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C10B53/02C02F101/10C02F101/20C02F101/30
CPCB01J20/20C02F1/283C10B53/02C02F2101/103C02F2101/30C02F2101/20B01J2220/4825Y02E50/10
Inventor 臧淑艳左莹莹胡静娴李文龙蔚蓝李波吕紫薇
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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