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A kind of composite bentonite material desorption regeneration method for adsorbing ammonia nitrogen wastewater

A technology of adsorption materials and composite adsorption materials, which is applied in the field of desorption and regeneration of adsorption wastewater materials, can solve the problems of long adsorption period and difficult desorption, and achieve the effect of improving recycling capacity

Inactive Publication Date: 2019-04-23
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

In the water treatment process, the organic matter adsorbed by the adsorbent is mostly difficult to desorb and thermally decompose, and the adsorption cycle is long

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  • A kind of composite bentonite material desorption regeneration method for adsorbing ammonia nitrogen wastewater

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with examples.

[0034] A method for desorption regeneration of a composite bentonite material for adsorbing ammonia nitrogen wastewater. The method performs desorption regeneration according to the following process: use SDS-Al composite modified bentonite material to adsorb ammonia nitrogen wastewater to achieve adsorption saturation, and weigh the dry adsorption saturated composite bentonite Add 2g of material to 100ml of KCl solution with a concentration of 550mg / L, adjust the pH=3, under the condition of 30℃, stir at a speed of 250r / min, stir for 20min, let it stand for 2 hours, filter with suction, and wash , drying, grinding and sieving to obtain the desorption regeneration material of the saturated adsorption material. Add 5g of composite modified bentonite material to a 250mL iodine measuring bottle, add 100mL of ammonia nitrogen wastewater solution with a concentration of 1000mg / L, shake it...

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Abstract

A method for desorption regeneration of a composite bentonite material for efficiently adsorbing ammonia nitrogen wastewater, relating to a method for desorption regeneration of an adsorption wastewater material. The invention utilizes SDS‑Al composite modified bentonite to treat ammonia nitrogen wastewater to achieve saturated adsorption, and weighs the dried adsorption Add 2g of saturated bentonite material to 100ml of KCl solution with a concentration of 550mg / L, adjust the pH=3, and at a temperature of 30°C, stir at a speed of 250r / min, stir for 20min, let stand for 2 hours, and filter with suction , washing, drying, grinding and sieving to obtain the desorption regenerated material of the saturated adsorption material. The method can desorb the saturated bentonite to restore the adsorption capacity, save resources, improve the use efficiency of the adsorption material, and reduce the use cost. The invention desorbs and regenerates the composite bentonite material saturated with ammonia nitrogen adsorption, restores the adsorption capacity, and achieves the goal of recycling.

Description

technical field [0001] The invention relates to a desorption regeneration method for adsorbing wastewater materials, in particular to a desorption regeneration method for composite bentonite materials for adsorbing ammonia nitrogen wastewater. Background technique [0002] The adsorption properties of bentonite adsorption materials include three types: physical adsorption, chemical adsorption and exchange adsorption. Physical adsorption has no selectivity, and mainly occurs by virtue of the van der Waals force between the adsorbate and the adsorbent, and the force is weak, so it belongs to reversible adsorption. The physical adsorption of this kind of adsorption material is mainly determined by the size of its specific surface area. Chemisorption is the adsorption produced by the formation of chemical bonds between the adsorbent and the adsorbate. Chemisorption is strong and selective. Because montmorillonite has an unsaturated negative charge, there must be an equal amou...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/12C02F1/28C02F101/16
CPCB01J20/12B01J20/3433B01J20/3475C02F1/28C02F2101/16
Inventor 邵红张广兴单丹滢聂鑫
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY