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Preparation method for adsorbent used for removing cadmium from mussel cooking liquor

A cooking liquid and adsorbent technology, which can be used in chemical instruments and methods, other chemical processes, food science, etc., and can solve problems such as excessive heavy metals

Inactive Publication Date: 2018-07-03
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mussels are filter-feeding and have a strong ability to accumulate heavy metals and other pollutants, which makes it easy for heavy metals to exceed the standard when the concentrated juice is processed into aquatic seasonings, especially the problem of cadmium exceeding the standard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the preparation method of a kind of mussel cooking liquid decadmium adsorbent described in the present invention, described preparation method comprises the following steps:

[0019] a) Cut the ink sac of the tiger squid and squeeze out the ink;

[0020] b) After soaking the ink with an equal volume of distilled water overnight and for 10 hours, centrifuge at 1000 r / min for 10 minutes to obtain a precipitate;

[0021] c) Add distilled water with a solid-liquid ratio of 1:50 to the precipitate, adjust the pH to 10.5, add 4200 U / g of alkaline protease, incubate at 50°C for 4 hours, then inactivate the enzyme and centrifuge at 1000 r / min Precipitation was obtained after 10 minutes;

[0022] d) The precipitate was washed with distilled water until it was neutral, and freeze-dried to obtain squid melanin, which was divided into vacuum-sealed bags and stored in a refrigerator at 4°C away from light.

Embodiment 2

[0023] Embodiment 2: the preparation method of a kind of mussel cooking liquid decadmium adsorbent described in the present invention, described preparation method comprises the following steps:

[0024] a) Cut the ink sac of the tiger squid and squeeze out the ink;

[0025] b) Soak the ink with an equal volume of distilled water overnight and centrifuge at 800r / min for 8min for 12 hours to obtain a precipitate;

[0026] c) Add distilled water with a solid-liquid ratio of 1:45 to the precipitate, adjust the pH to 10, add 4000U / g alkaline protease, incubate at 45°C for 3 hours, then inactivate the enzyme and centrifuge at 800r / min for 8 minutes get precipitation;

[0027] d) The precipitate was washed with distilled water until it was neutral, and freeze-dried to obtain squid melanin, which was divided into vacuum-sealed bags and stored in a refrigerator at 4°C away from light.

Embodiment 3

[0028] Embodiment 3: the preparation method of a kind of mussel cooking liquid cadmium-removing adsorbent of the present invention, described preparation method comprises the following steps:

[0029] a) Cut the ink sac of the tiger squid and squeeze out the ink;

[0030] b) Soak the ink with an equal volume of distilled water overnight and centrifuge at 1200 r / min for 12 minutes for 14 hours to obtain a precipitate;

[0031] c) Add distilled water with a solid-liquid ratio of 1:55 to the precipitate, adjust the pH to 11, add 4500 U / g of alkaline protease, incubate at 55°C for 5 hours, then inactivate the enzyme, and centrifuge at 1200r / min for 12min later precipitated;

[0032] d) The precipitate was washed with distilled water until it was neutral, and freeze-dried to obtain squid melanin, which was divided into vacuum-sealed bags and stored in a refrigerator at 4°C away from light.

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Abstract

The invention provides a preparation method for an adsorbent used for removing cadmium from a mussel cooking liquor. The preparation method comprises the following steps: a) cutting an ink sac of a Pharaoh cuttlefish, and carrying out squeezing so as to obtain an ink; b) soaking the ink with equivalent distilled water overnight and for at least 10 hours, and carrying out centrifuging at 800 to 1200 r / min for 8 to 12 min so as to obtain a precipitate; c) adding distilled water into the precipitate according to a solid-to-liquid ratio of 1: (45-55), adjusting a pH value of an obtained solution to 10 to 11, then adding alkaline protease with a content of 4000 to 4500 U / g, carrying out heat-preserving and enzymatic hydrolysis at 45 to 55 DEG C for 3 to 5 h, then killing enzyme, and carrying out centrifuging at 800 to 1200 r / min for 8 to 12 min so as to obtain a precipitate; and d) washing the precipitate with distilled water until the precipitate is neutral, carrying out freeze-drying so as to obtain a cuttlefish ink melanin, packaging the cuttlefish ink melanin into a vacuum seal bag, and carrying out lucifugal preservation in a refrigerator at 4 DEG C. The preparation method providedby the invention has the characteristics of natural sources, simple and environment-friendly preparation process, safety, high efficiency, etc.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for removing cadmium from mussel cooking liquor, and belongs to the technical field of preparation of heavy metal adsorbents. Background technique [0002] Squid is one of the main cephalopod economic animals in my country. It has a well-developed ink sac structure at the end of its ventral rectum, which contains a large amount of ink. The study found that squid ink is a viscous suspension, and the main active ingredients are eumelanin and proteoglycan complex. The eumelanin in ink is considered to be a typical natural melanin, and there are a large number of groups that can participate in metal bonding, such as -OH, -NH, -COOH, etc., and have better binding potential toxic cations (mainly transition metal ions) It is a safe and efficient biosorbent material. [0003] mussels( Mussel ) is commonly known as mussels, and the method of boiling meat is often used in production for processing....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24A23L5/20
CPCA23L5/273B01J20/24
Inventor 陈小娥方旭波余辉陈美玉
Owner ZHEJIANG OCEAN UNIV
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