Rare metal-based sludge activated carbon and application thereof in removal of sulfur, ammonia and phosphorus

A technology of sludge activated carbon and rare metals, applied in water/sludge/sewage treatment, water pollutants, separation methods, etc., can solve rare problems, achieve well-developed pore structure, good application prospects, and adsorption active points bit more effect

Active Publication Date: 2017-01-25
徐海燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are not many studies on sludge activated carbon adsorbents for elements such as thionamidophos

Method used

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  • Rare metal-based sludge activated carbon and application thereof in removal of sulfur, ammonia and phosphorus
  • Rare metal-based sludge activated carbon and application thereof in removal of sulfur, ammonia and phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) After drying the remaining dilute sludge with a moisture content of 85% and an ash content of 35% for 24 hours, grind it into a sludge powder of 200-300 mesh, and mix the mass ratio of 0.1:45 with a particle size of 150 mesh. Mix manganese ore powder and sludge powder evenly, add zinc chloride and dilute sulfuric acid composite activator, wherein the volume of zinc chloride and dilute sulfuric acid is 3:1, the concentration of zinc chloride is 4mol / L, the mass fraction of dilute sulfuric acid 20%, ultrasonically mixed for 1 hour, allowed to stand for 24 hours, dried and activated at 80°C for 24 hours, placed in a tube furnace at 550°C, high-temperature carbonization reaction for 1 hour, cooled and washed until neutral to obtain soft manganese composite sludge activated carbon.

[0030] (2) 200 mesh sludge powders are pyrolyzed under an ammonia atmosphere to form sludge activated carbon powders, and by weight, the sludge activated carbon powders with a mass ratio of 4...

Embodiment 2

[0033](1) After drying the dewatered cake with a moisture content of 90% and an ash content of 50% for 24 hours, it is ground into a 300-mesh sludge powder, and the mass ratio is 5:45, and the particle size is a 300-mesh pyrolusite powder and Mix the sludge powder evenly, add a composite activator of zinc chloride and dilute sulfuric acid, wherein the volume of zinc chloride and dilute sulfuric acid is 6:1, the concentration of zinc chloride is 6mol / L, and the mass fraction of dilute sulfuric acid is 45% , ultrasonically mixed for 6 hours, left to stand for 24 hours, dried and activated at 130°C for 72 hours, placed in a tube furnace at 650°C, carbonized at high temperature for 5 hours, cooled and washed to neutral to obtain soft manganese composite sludge activated carbon.

[0034] (2) 300 purpose sludge powders are pyrolyzed under an ammonia atmosphere to form sludge activated carbon powders, and by weight, the sludge activated carbon powders with a mass ratio of 45 parts are...

Embodiment 3

[0037] (1) After drying the remaining dilute sludge with a moisture content of 88% and an ash content of 45% for 24 hours, grind it into a 250-mesh sludge powder, and make a mass ratio of 1:45 and a particle size of 200-mesh pyrolusite powder Mix evenly with sludge powder, add zinc chloride and dilute sulfuric acid composite activator, wherein the volume of zinc chloride and dilute sulfuric acid is 4:1, the concentration of zinc chloride is 5mol / L, and the mass fraction of dilute sulfuric acid is 25 %, ultrasonically mixed for 3 hours, left to stand for 24 hours, dried and activated at 100°C for 36 hours, placed in a tube furnace at 600°C, carbonized at high temperature for 2 hours, cooled and washed to neutral to obtain soft manganese composite sludge activated carbon.

[0038] (2) 250 purpose sludge powders are pyrolyzed under an ammonia atmosphere to form sludge activated carbon powders, and by weight, the sludge activated carbon powders with a mass ratio of 45 parts are imm...

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Abstract

The invention provides a rare metal-based sludge activated carbon and application thereof in the removal of sulfur, ammonia and phosphorus. The rare metal-based sludge activated carbon includes sludge activated carbon and metal elements such as manganese, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium and the like, and is specifically prepared by a method comprising the following steps: mixing pyrolusite powder with activated sludge, adding a zinc chloride compounded activating agent into the mixture, activating the mixture at a high temperature, carbonizing the mixture to obtain pyrolusite compounded activated sludge, mixing the activated sludge with rare earth oxide powder and a chelating agent after the activated sludge is modified by potassium hydroxide solution, heating the mixture in a microwave oven, carbonizing the mixture to obtain rare earth compounded activated sludge, and mixing the compounded activated sludge to obtain a product. The rare metal-based sludge activated carbon prepared by the method has the advantages of high activity, high porosity, uniform pore size distribution, high adsorption capacity, capability of chelating a plurality of metals and microorganisms, high capacity of adsorbing sulfur, ammonia and phosphorus and high rate of removing the sulfur, the ammonia and the phosphorus in sewage and waste.

Description

technical field [0001] The invention belongs to the technical field of sludge activated carbon materials, and in particular relates to a rare metal-based sludge activated carbon and its application in the removal of thiamine. Background technique [0002] With the rapid development of the national economy and the sharp increase in water consumption, a large amount of water pollution is accompanied, and sewage treatment and water pollution control will also produce a large amount of sludge and odor pollution. The stench of sludge is mainly hydrogen sulfide and ammonia. The stench is not only harmful to human health, animal and plant growth, but also has an unsafe impact on society. At present, the main methods to deal with odor at home and abroad are adsorption, absorption, combustion and biological purification. Among them, adsorption and biological purification are the main treatment methods, because the cost of biological purification is low, and the use of adsorption meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28B01D53/02C02F101/10C02F101/16
Inventor 李风浪李舒歆
Owner 徐海燕
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