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Iron-carbon micro-electrolysis filler as well as preparation method and application thereof

A technology of iron-carbon micro-electrolysis and iron powder, which is applied in chemical instruments and methods, electrochemical and biological combination treatment, water pollutants, etc., can solve the problems that the effluent cannot meet the discharge standard, the effect of pollutants is poor, passivation, etc., and achieve Effect of improving electrochemical activity, long hydraulic retention time, and improving comprehensive performance

Inactive Publication Date: 2021-03-26
GUOHE ENVIRONMENTAL RES INST (NANJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the long-term operation of the system, iron-carbon fillers will have problems such as passivation and hardening, which will lead to poor removal of pollutants by the system, and the effluent cannot meet the discharge standards.

Method used

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  • Iron-carbon micro-electrolysis filler as well as preparation method and application thereof
  • Iron-carbon micro-electrolysis filler as well as preparation method and application thereof
  • Iron-carbon micro-electrolysis filler as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. Preparation of iron-carbon micro-electrolytic filler:

[0024] (1) Preparation of raw materials:

[0025] Pass the iron powder, activated carbon powder, bentonite and manganese oxide through a 200-mesh sieve, and then dry them in an oven for half an hour.

[0026] (2) Stirring:

[0027] The powder is mixed according to the mass percentage of iron powder: activated carbon powder: bentonite: manganese oxide = 60:15:17:8, and stirred by a mixer for more than 1 hour to stir evenly.

[0028] (3) Add water to granulate:

[0029] Add ammonium bicarbonate solution with a mass percentage of 0.5%% to the mixed powder and stir evenly, add water at 10% of the mass of the mixed powder to make spherical particles of 10-20mm, then place them in an oven and dry at 100°C Dry more than 2h.

[0030] (4) Calcination:

[0031] Place the dried filler in a muffle furnace and calcinate it at 600°C for 0.5 hour in an air atmosphere to obtain an iron-carbon micro-electrolytic ...

Embodiment 2

[0033] Embodiment 2. Preparation of iron-carbon micro-electrolytic filler:

[0034] (1) Preparation of raw materials:

[0035] Pass iron powder, activated carbon powder, bentonite and manganese oxide through a 200-mesh sieve, and then put them in an oven to dry for half an hour.

[0036] (2) Stirring:

[0037] The powder is mixed according to the mass percentage of iron powder: activated carbon powder: bentonite: manganese oxide = 41:37:27:5, and stirred by a mixer for more than 1 hour to stir evenly.

[0038] (3) Add water to granulate:

[0039] Add 2% sodium bicarbonate solution to the mixed powder and stir evenly, add water 10% of the mixed powder mass to make 10~20mm spherical particles, then place them in an oven and dry at 105°C More than 2 hours.

[0040] (4) Calcination:

[0041] Place the dried filler in a muffle furnace and calcinate it at 500°C for 3 hours in an air atmosphere to obtain an iron-carbon micro-electrolytic filler.

Embodiment 3

[0042] Embodiment 3. Preparation of iron-carbon micro-electrolytic filler:

[0043] (1) Preparation of raw materials:

[0044] Pass iron powder, activated carbon powder, bentonite and manganese oxide through a 200-mesh sieve, and then put them in an oven to dry for half an hour.

[0045] (2) Stirring:

[0046] The powder is mixed according to the mass percentage of iron powder: activated carbon powder: bentonite: manganese oxide = 48:16:32:4, and stirred by a mixer for more than 1 hour to stir evenly.

[0047] (3) Add water to granulate:

[0048] Add 1% by mass sodium bicarbonate solution to the mixed powder and stir evenly, add 10% of the mass of the mixed powder with water to make 10-20mm spherical particles, then place them in an oven and dry at 105°C More than 2 hours.

[0049] (4) Calcination:

[0050] Place the dried filler in a muffle furnace and calcinate it at 500°C for 3 hours in an air atmosphere to obtain an iron-carbon micro-electrolytic filler.

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Abstract

The invention provides an iron-carbon micro-electrolysis filler as well as a preparation method and application thereof, and belongs to the technical field of new energy and environmental engineering.The method comprises the following steps: firstly, preparing an iron-carbon micro-electrolysis filler, and then constructing a CW-MFC system by taking the iron-carbon micro-electrolysis filler as a matrix of a coupling system. The system has the dual functions of sewage treatment and biological power generation, chemical energy is recycled in the form of electric energy while sewage is treated, and the win-win situation of environment-friendly ecological improvement and energy conservation is achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy and environmental engineering, and in particular relates to an iron-carbon micro-electrolytic filler and its preparation method and application. Background technique [0002] Iron-carbon micro-electrolysis has been extensively studied as a cost-effective and environmentally friendly treatment technology for the removal of pollutants in wastewater. When the mixture of iron and activated carbon (GAC) is immersed in the solution, the iron acts as the anode and the activated carbon (GAC) acts as the cathode to form a potential difference, resulting in many microscopic galvanic cells. During the treatment of wastewater, Fe 2+ and Fe 3+ During the precipitation process, ferric hydroxide and ferrous hydroxide are formed, which have comprehensive functions of complexation, co-precipitation and adsorption, and are good flocculants for removing organic pollutants. However, with the long-term operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/32C02F3/34C02F101/30
CPCC02F3/005C02F3/34C02F3/32C02F2001/46133C02F2001/46138C02F1/46176C02F1/46109C02F1/46114C02F2101/30
Inventor 李超操家顺周康罗景阳方芳冯骞薛朝霞张春雷努尔
Owner GUOHE ENVIRONMENTAL RES INST (NANJING) CO LTD
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