Preparation method of soluble inorganic phosphorus and arsenic adsorption membrane

A technology of inorganic phosphorus and adsorption membrane, which is applied in the field of environmental science and analytical chemistry, can solve the problems of zirconium ion loss and influence on instrument measurement, and achieve the effects of not easy saturation, simple preparation method and good repeatability

Inactive Publication Date: 2018-04-20
DALIAN UNIV OF TECH
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Problems solved by technology

Zirconium gel membranes prepared based on physical adsorption may lose zirconium ions during use, and zirconium ions may enter the eluent during elution, affecting subsequent instrumental measurements

Method used

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  • Preparation method of soluble inorganic phosphorus and arsenic adsorption membrane
  • Preparation method of soluble inorganic phosphorus and arsenic adsorption membrane
  • Preparation method of soluble inorganic phosphorus and arsenic adsorption membrane

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Embodiment Construction

[0027] The technical scheme and beneficial effects of the present invention will be further described below in conjunction with the DGT determination of arsenic (trivalent and pentavalent) in a certain water body in Dalian.

[0028] (1) 100mL 0.005mol / L cerium nitrate Ce(NO 3 ) 3 ·6H 2 O ethanol solution mixed with 100mL 0.2mol / L NaOH solution, stirred and precipitated to obtain bright yellow cerium oxide nanomaterials, washed with ethanol and deionized water for 3 times, centrifuged to collect the precipitate at the bottom, and dried in an oven at 100°C 12h.

[0029] (2) Mix the cerium dioxide nanomaterial obtained in (1) with the acrylamide solution evenly, then add 10% ammonium persulfate in a volume ratio of 1 / 54 to the acrylamide solution, and tetramethylethylenedioxide in a volume ratio of 1 / 180 Amine, after mixing evenly, slowly inject the mixed solution into the gap between two glass plates sandwiched by U-shaped thin slices (0.4mm), after the air bubbles are discha...

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Abstract

The invention discloses a preparation method of a soluble inorganic phosphorus and arsenic adsorption membrane. According to the preparation method of the adsorption membrane, cerium oxide nanoparticles are dispersed in an acrylamide solution, and acrylamide polymerization reaction is carried out to fix the nanoparticles uniformly in polyacrylamide gel. The preparation steps include: dispersing cerium oxide nanoparticles into the acrylamide solution, adding ammonium persulfate and tetramethylethylenediamine, mixing the substances evenly, then injecting the mixture into a two-glass plate gap clamping a U-shaped sheet, conducting horizontal placement at room temperature for 30min, then opening the glass plates and taking out a gel membrane, soaking the gel membrane in deionized water for 24hto remove unreacted reagent, cutting the gel membrane to a circle with a diameter of 2.5cm to make the adsorption membrane. The preparation method of the adsorption membrane provided by the inventionhas the characteristics of simple operation and good repeatability. The adsorption membrane has large adsorption capacity and good selectivity on soluble inorganic phosphorus and arsenic, can be preserved for a long time in a solution, and has broad application prospect in the fields of analytical chemistry and environmental analysis.

Description

technical field [0001] The invention discloses a preparation method of a soluble inorganic phosphorus and arsenic adsorption film, which is suitable for measuring the soluble inorganic phosphorus and arsenic in water by a film diffusion gradient technique, and belongs to the fields of analytical chemistry and environmental science. Background technique [0002] Phosphorus is one of the three essential nutrients for living things. Excessive phosphorus in the water body will cause eutrophication of the water body, lead to excessive algae reproduction in the water, destroy the ecological balance of the water body, and threaten the safety of human life. Inorganic arsenic (trivalent arsenic and pentavalent arsenic) has teratogenic, carcinogenic or mutagenic effects. Long-term drinking of arsenic-contaminated water can cause abnormal skin pigment metabolism and the occurrence of various diseases. Therefore, it is of great significance to develop new sampling and determination tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/291B01J20/30
CPCB01J20/291
Inventor 谭峰姜晓陈景文任苏瑜
Owner DALIAN UNIV OF TECH
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