Aquatic plant grease-cellulose acetate composite semipermeable membrane type bionic passive sampling device

A technology of cellulose acetate and semi-permeable membrane, which is applied in the field of bionic passive sampling devices of aquatic vegetable fat-cellulose acetate composite semi-permeable membrane, can solve the problems of restricting the application of aquatic plants, large species differences, poor reproducibility, etc., and achieve shortening Effects of equilibration time, enhanced hydrophilicity, and low-cost monitoring

Inactive Publication Date: 2015-04-08
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, defects such as large species differences, poor reproducibility, and difficulty in survival restrict the application of aquatic plants in in-situ monitoring of organic pollutants in water bodies.

Method used

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  • Aquatic plant grease-cellulose acetate composite semipermeable membrane type bionic passive sampling device
  • Aquatic plant grease-cellulose acetate composite semipermeable membrane type bionic passive sampling device
  • Aquatic plant grease-cellulose acetate composite semipermeable membrane type bionic passive sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Production of preparation tools for aquatic vegetable fat-cellulose acetate composite semi-permeable membrane

[0040] figure 1 It is a structural representation of the preparation tool in the present invention, as shown in the figure:

[0041] (1) Using a smooth tempered glass plate 2 as the base, four thin tempered glass strips 4 with a width of 5 mm and a thickness of 50-200 μm are used on the upper surface of the tempered glass plate 2, and the length is 15 mm. Cuboid glass groove 3 with a width of 12 cm and a depth of 50-200 μm, adjust the depth of the glass groove 3 according to the thickness of the semi-permeable membrane that is actually required;

[0042] (2) The scraper 1 required for the preparation of the semi-permeable membrane was developed using toughened glass or metal materials with a certain weight. The scraper 1 was in the shape of a cuboid. The width of the scraper 1 was 12 cm, the height was 5-10 cm, and the thickness was 0.5- 0.8 cm, t...

Embodiment 2

[0044] Example 2 Preparation of aquatic vegetable fat-cellulose acetate composite semipermeable membrane

[0045] Weigh cellulose acetate, cis-9,12-octadeca-dienoic acid, anhydrous magnesium perchlorate, acetone and 1,4-dienoic acid in a mass ratio of 9:1:1:40:5 For oxygen hexane, stir and mix the various materials and put them into an ultrasonic cleaner to vibrate for 1 hour, and then vibrate at a constant temperature of 100 rpm at 25 °C for no less than 24 hours until the casting solution is evenly mixed. At this time, the casting The membrane solution is clear without any air bubbles and solid impurities. Take out a small amount of mixed raw material and pour it into the rectangular parallelepiped glass groove 3 on the tempered glass plate 2, so that it is evenly dispersed into long strips with a width of 1-2 cm. Put the scraper 1 between the left and right tempered glass retaining grooves 5, put the wedge-shaped lower edge of the scraper 1 against the top of the glass gro...

Embodiment 3

[0046] Example 3 Production of supporting external devices suitable for in-situ sampling of organic pollutants in lakes, rivers and other water bodies

[0047] figure 2 It is a structural schematic diagram of the matching external device in the present invention, image 3 It is a longitudinal sectional view of the matching external device in the present invention, combined with figure 2 , image 3 As shown, the matching external device includes a stainless steel cylinder 6 and screw caps 7 at both ends. The screw cap 7 and the stainless steel cylinder 6 are threaded. There are small holes on the screw cap 7, and a stainless steel mesh 9 is welded on the inside. The mesh 9 has a pore size of 75-150 μm, which facilitates the inflow of water and prevents disturbances such as organisms and particles. The stainless steel cylinder 6 is evenly divided into two halves longitudinally, and an aquatic vegetable fat-cellulose acetate composite semi-permeable membrane 8 is placed betw...

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Abstract

The invention relates to an aquatic plant grease-cellulose acetate composite semipermeable membrane. Inexpensive and protogenetic aquatic plant grease is used as a main raw material, and highly hydrophilic cellulose acetate is used as an outer membrane material to prepare the aquatic plant grease-containing semipermeable membrane which has the advantages of uniform grease dispersion, large specific area and integrated structure. The balance time required for collection of hydrophobic organic pollutants in a water body can be shortened greatly, and costs of raw materials can be reduced significantly. The invention also provides a preparation tool and a preparation method for preparation of the aquatic plant grease-cellulose acetate composite semipermeable membrane. In addition, the invention provides a supporting external device suitable for in-situ sampling of organic pollutants in lakes, rivers and other water bodies. The simulation of aquatic plants can be realized for in-situ, accurate, convenient and low-cost monitoring of organic pollutants in water bodies.

Description

technical field [0001] The invention belongs to the fields of environmental science, analytical chemistry and geology, and relates to a bionic passive sampling device of aquatic vegetable fat-cellulose acetate composite semi-permeable membrane and related technologies, in particular to aquatic vegetable lipid-cellulose acetate composite semi-permeable membrane, aquatic plant Preparation tools for lipid-cellulose acetate composite semi-permeable membranes and supporting devices suitable for in-situ sampling of organic pollutants in lakes, rivers and other water bodies. Background technique [0002] Organic pollutants are widely and persistently present in lakes, rivers and other water bodies and even drinking water sources, and have carcinogenic, teratogenic, mutagenic effects, which pose a great threat to the aquatic ecosystem, and can also be transmitted and amplified through the aquatic ecosystem. And enter the food chain, endangering human health, which has aroused gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/16B01D61/08B01D61/10B01D67/00G01N1/10
Inventor 陶玉强
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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