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Preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater

A technology of carbon-based materials and heavy metals, which is applied in the preparation and application of carbon-based materials for efficient adsorption and purification of heavy metal wastewater. It can solve problems that need to be improved, and achieve the effects of increased porosity and specific surface area, small environmental side effects, and optimized adsorption capacity.

Active Publication Date: 2021-10-26
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the current hydrothermal carbon improvement technology needs to be improved in terms of the purification capacity of heavy metal wastewater and the gas production capacity of the prepared materials.

Method used

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  • Preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater
  • Preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater
  • Preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The main component of embodiment 1 hydrothermal charcoal leaching solution

[0051] In this example, the main components of three kinds of hydrothermal charcoal leaching solutions were investigated, and whether they could be used as carbon sources and nutrient elements for microorganisms was evaluated. The results showed that hydrothermal charcoal leaching solutions contained a large amount of soluble carbon and nutrients such as NPK, which could be used as microorganisms. Provides nutrients to facilitate the microbial fermentation process and increase biogas production.

[0052] Table 1 Main components of hydrothermal charcoal leaching solution

[0053]

[0054]

Embodiment 2

[0055] Example 2 Specific surface area, pore analysis and infrared spectrum scanning information before and after hydrothermal carbon microbial improvement

[0056] In this example, the specific surface area and pore analysis (BET-BJH) and infrared spectrum scanning information of hydrothermal charcoal before and after microbial activation and improvement were investigated. The functional groups such as hydroxyl group and carboxyl group all changed, which indicated that the surface chemical characteristics and adsorption performance of hydrothermal carbons would change; the pH differences of different hydrothermal carbons before treatment and after microbial aging were large. This will affect the adsorption performance of hydrothermal carbon ( figure 2 ).

Embodiment 3

[0057] Example 3 A kind of microbial activation and blasting improves the adsorption of lead ions by hydrothermal charcoal

[0058] In order to obtain microbial activation prepared by the present invention and steam explosion improved hydrothermal carbon to Pb 2+ Adsorption performance, the present embodiment has carried out isothermal adsorption test research. Four kinds of hydrothermal charcoal materials were selected, namely SHC200, WHC200, SHC260 and WHC260 (sawdust, wheat straw 200°C hydrothermal charcoal and sawdust, wheat straw 260°C hydrothermal charcoal). Weigh 0.025 biochar and add 25ml 50mg / L Pb to each 2+ solution, after shaking for 24h, measure the solution Pb again 2+ Concentration, the difference between the two concentrations, as a hydrothermal charcoal to adsorb Pb 2+ Ability. The results showed that the hydrothermal charcoal was modified by microbial fermentation and steam explosion, and the Pb 2+ The adsorption capacity of Pb was significantly increased...

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Abstract

The invention discloses a preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater, that is, hydrothermal charcoal is used as a raw material, combined with microbial liquid fermentation and steam explosion processes, the hydrothermal charcoal is improved, and a heavy metal sewage is prepared. Efficient adsorption material. The invention achieves the following beneficial effects: 1) The carbon-based material prepared by the invention for efficient adsorption and purification of heavy metal wastewater has good adsorption properties for lead ions and copper ions. 2) Provide a more sufficient carbon source for the microbial fermentation process and promote the production of biogas; 3) Through the microbial fermentation process, the content of organic acids and organic phenols in hydrothermal charcoal can be reduced, and its negative impact on the environment can be reduced. Increasing the porosity and specific surface area of ​​hydrothermal carbon is beneficial to the adsorption of heavy metal ions. 4) Through the steam explosion process, the porosity and specific surface area of ​​the hydrothermal carbon are further improved, and the adsorption capacity of the hydrothermal carbon to heavy metal ions is improved.

Description

technical field [0001] The invention relates to a preparation and application method of a carbon-based material for efficient adsorption and purification of heavy metal wastewater. Specifically, it is a process of using microbial fermentation and steam explosion to decompose soluble organic matter in hydrothermal charcoal, and to activate and improve hydrothermal charcoal. , a technology that increases the porosity and specific surface area of ​​hydrothermal carbon to improve the adsorption capacity of hydrothermal carbon to heavy metal ions in polluted water. Background technique [0002] Hydrothermal carbonization technology [0003] Hydrothermal carbonization is a new type of carbonization technology. Specifically, biomass is used as raw material, water is used as the reaction medium, and oxygen-containing functional groups are obtained through hydrothermal reaction at a temperature of 150-500 ° C and high pressure conditions. A technology of carbon materials. Compared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/30B01J20/3078C02F1/283C02F2101/20Y02E50/30
Inventor 冯彦房刘杨薛利红杨林章刘晓宇何世颖段婧婧
Owner JIANGSU ACAD OF AGRI SCI
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