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Method for preparing a membrane capable of adsorbing cadmium ions in wastewater by using fucoidan and sodium carboxymethylcellulose, and its products and applications

A technology of sodium carboxymethyl cellulose and fucoidan, which is applied in the directions of adsorption water/sewage treatment, separation method, chemical instrument and method, etc., can solve problems such as unreported fucoidan and sodium carboxymethyl cellulose, Achieving excellent application value, increasing flexibility and elasticity, and easy availability of raw materials

Active Publication Date: 2022-03-25
WENZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Currently, it has not been reported in our study that fucoidan mixed with carboxymethylcellulose sodium (CMCNa) was used for the development of thin film materials and for the treatment of cadmium ions in wastewater

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  • Method for preparing a membrane capable of adsorbing cadmium ions in wastewater by using fucoidan and sodium carboxymethylcellulose, and its products and applications
  • Method for preparing a membrane capable of adsorbing cadmium ions in wastewater by using fucoidan and sodium carboxymethylcellulose, and its products and applications
  • Method for preparing a membrane capable of adsorbing cadmium ions in wastewater by using fucoidan and sodium carboxymethylcellulose, and its products and applications

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like figure 1 — Figure 10 As shown, a kind of fucoidan and sodium carboxymethyl cellulose prepared with continuous adsorption treatment of wastewater heavy metal Cd 2+ The membrane method includes the following steps:

[0035] 1. Preparation of fucoidan / sodium carboxymethyl cellulose film solution; it is known from the test of the amount of the flat film solution. Weigh 0.9 g of fucoidan and 0.60 g of sodium carboxymethyl cellulose and add them into distilled water to make up 1.00wt% fucoidan and 0.67wt% sodium carboxymethyl cellulose concentration of 90mL liquid, add 0.90-1.00mL (ie 1.00-1.11wt%) glycerol, add 0.60-0.65mL (ie 0.30-0.32wt%) vomit Warm to -80, stir and dissolve on a magnetic temperature-controlled stirrer with a temperature of 30-60 °...

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Abstract

The invention discloses a method for preparing a membrane capable of absorbing and treating cadmium ions in wastewater by using fucoidan and sodium carboxymethyl cellulose, and its products and applications. The technical scheme includes the following steps: (1) Fucoidan and carboxymethyl cellulose (2) remove the air bubbles in the composite membrane solution of fucoidan and sodium carboxymethylcellulose; (3) prepare the blank film: mix the composite membrane of fucoidan and sodium carboxymethylcellulose Pour the solution into the film-forming mold and solidify into a blank film; (4) Dry the blank film to remove water; (5) Cross-link and fix; (6) Dry and form; (7) Adsorb Cd in the film soaking wastewater 2+ ; (8) The saturated membrane is regenerated with HCl solution. The invention has the advantages of low energy consumption, simple operation, environmental protection, membrane adsorption regeneration and repeated use, and improves the application field and application value of the fucoidan.

Description

technical field [0001] The invention belongs to the field of membranes capable of continuously adsorbing and treating heavy metals in wastewater, in particular to a method for preparing a membrane capable of adsorbing and treating cadmium ions in wastewater by using fucoidan and sodium carboxymethyl cellulose, and its products and applications. Background technique [0002] Due to human activities, a large amount of heavy metal compounds are in a flowing state every year and enter water through various industries, such as mineral extraction, water treatment, metal casting coating, batteries, nuclear industry and nuclear power generation, etc. In 2018, among the 10,168 national-level groundwater quality monitoring points in the country, 1.9% were classified as Class I, 9.0% as Class II, 2.9% as Class III, 70.7% as Class IV, and 15.5% as Class V. Among the five types of water quality monitoring points, the heavy metals in individual monitoring points exceeded the standard. Th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/12B01D71/08B01D71/06B01D67/00B01J20/24B01J20/30B01J20/28B01J20/34C02F1/44C02F1/28C02F101/20
CPCB01D71/12B01D71/08B01D71/06B01D67/0002B01J20/24B01J20/28033B01J20/3475C02F1/44C02F1/286C02F2303/16C02F2101/20
Inventor 吴祥庭刘玉萍
Owner WENZHOU UNIV