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Method for preparing film type biological adsorbing medium

A biosorption, medium technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of limited bacterial application, inability to meet requirements, and insufficient repeated batches, etc. Adsorption capacity, low cost, effect of increasing surface area

Active Publication Date: 2013-04-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the insufficient batches of repeated use, it cannot meet its requirements in wastewater treatment, which limits the application of bacteria as a water treatment agent in industrial wastewater treatment.

Method used

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  • Method for preparing film type biological adsorbing medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Grind 10g of monosodium glutamate waste mycelia, the particle size is 2 On the ceramic membrane, the surface is covered with a ceramic membrane of the same size. After compaction, the adsorbent is solidified in 0.005M NaOH solution for 12 hours, and washed with water until neutral. Dry at 30°C to obtain a membrane biosorption medium. Take 0.15g membrane biosorption medium and 50ml Cu(SO 4 ) 2 Aqueous solution, join in the Erlenmeyer flask of 150ml, at room temperature, after rotating speed 150dyn / m shakes 24 hours (adsorption balance), measure the metal ion Cu in the solution 2+ The adsorption capacity is 108mg / g. The experimental results show that the adsorbent can be used in a wide range of pH = 2 to 13; desorb with 0.05M sulfuric acid 50ml for 3h, wash with water until neutral; then regenerate with 0.005M NaOH 200ml for 12h, rinse with water until neutral ,dry. In Cu 2+ When the concentration is 400mg / L, the adsorption capacity is still not significantly reduced...

Embodiment 2

[0029] The operating methods of embodiment 2, embodiment 3, embodiment 4 and embodiment 5 are the same as embodiment 1, and the operating parameters are shown in table 1.

Embodiment 5

[0031] Crush 10g of bean curd with a particle size of 2 On the cellulose acetate film, the surface is covered with cellulose acetate film of the same size. After compaction, the adsorbent is solidified in 0.25M NaOH solution for 3 hours, and washed with water until neutral. Dry at 30°C to obtain a membrane biosorption medium. Take 0.15g membrane biosorption medium and 50ml Cu(S0 4 ) 2 Aqueous solution, join in the Erlenmeyer flask of 150ml, at room temperature, after rotating speed 150dyn / m shakes 24 hours (adsorption balance), measure the metal ion Cu in the solution 2+ The adsorption capacity is 125mg / g. The experimental results show that the adsorbent can be used in a wide range of pH = 2 to 13; then desorb with 10ml of 0.8M citric acid for 8h, wash with water until neutral; then use 1M NaCO 3 20ml regeneration 8h, rinse with water to neutral, dry. In Cu 2+ When the concentration is 400mg / L, the adsorption capacity is still not significantly reduced after repeated use...

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Abstract

The invention relates to a method for preparing a film type biological adsorbing medium, which belongs to the field of biological adsorbents and can be applied to the removal and recycling of heavy metal ions. A waste biological organic matter which is directly adopted as a water treatment agent has small mechanical strength and the adsorption capacity of 40mg / g at most and is easy for breakage. The film type biological adsorbing medium is prepared in such a way that a film is used as a carrier for embedding the granular waste organic matter and is desorbed by the dilute acid of 0.02-1M afterbeing adsorbed; and the biological adsorbing medium is regenerated and recycled by the dilute alkali of 0.005-1M after being adsorbed. The invention has low cost, the adsorption capacity of 40-200mg / g and no obvious reduction by using for more than 100 times and can not generate secondary pollution.

Description

technical field [0001] The invention relates to a preparation method of a membrane-type biological adsorption medium, which belongs to the field of biological adsorbents. The core materials are waste bio-organic matter and agricultural by-products produced by fermentation. The adsorbent can be applied to the removal of heavy metal ions and the recovery of precious metals. Background technique [0002] Industries such as electroplating, dyestuffs, tanning and metallurgy discharge a large amount of industrial wastewater containing various heavy metal ions every year. These wastewaters cause serious harm to humans and the surrounding ecological environment. Environmental pollution caused by wastewater has attracted more and more attention. At present, there are chemical treatment methods, ion exchange methods, adsorption separation methods, membrane separation methods, and microbial methods for this type of wastewater treatment containing a variety of heavy metal ions. These m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 苏海佳兰凯谭天伟
Owner BEIJING UNIV OF CHEM TECH
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