Application and adsorption method of tea water extract or shaddock peel water extract for adsorbing heavy metal ions

A technology for adsorbing heavy metals and heavy metal ions, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low adsorption performance, limited adsorption capacity, secondary pollution, etc., and achieve superior adsorption High performance, easy operation and low cost

Inactive Publication Date: 2014-07-16
安徽省应用技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these adsorbents also have some problems, such as limited adsorption capacity, low adsorption performance, and secondary pollution

Method used

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  • Application and adsorption method of tea water extract or shaddock peel water extract for adsorbing heavy metal ions
  • Application and adsorption method of tea water extract or shaddock peel water extract for adsorbing heavy metal ions
  • Application and adsorption method of tea water extract or shaddock peel water extract for adsorbing heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～36

[0038] 1. Preparation of tea water extract: crush 10g of tea into powder and add to 300ml of deionized water, extract in 70°C water bath for 3 times, each time for 1.5 hours, after each extraction, centrifuge the extract to obtain supernatant, combine each time The supernatant obtained after extraction was concentrated and freeze-dried to obtain powdered tea water extract. The freeze-drying time was 16 hours, and the cold trap temperature was -40°C;

[0039]Preparation of water extract of pomelo peel: crush 20g of tea leaves into powder and add to 300ml of deionized water, extract 3 times in a water bath at 80°C for 2.5 hours each time, centrifuge the extract after each extraction to obtain supernatant, combine each extraction The obtained supernatant was concentrated and freeze-dried to obtain a powdered aqueous tea extract. The freeze-drying time was 16 hours, and the cold trap temperature was -40°C;

[0040] 2. The concentration of each configuration is 100mg·L -1 Tea wate...

Embodiment 37-54

[0051] 1. Preparation of tea water extract: crush 10g of tea into powder and add to 300ml of deionized water, extract twice in a water bath at 70°C for 2.5 hours each time, centrifuge the extract after each extraction to obtain supernatant, combine each time The supernatant obtained after extraction was concentrated and freeze-dried to obtain powdered tea water extract. The freeze-drying time was 16 hours, and the cold trap temperature was -40°C;

[0052] Preparation of pomelo peel water extract: crush 20g of tea leaves into powder and add to 300ml of deionized water, extract twice in a water bath at 80°C for 3.5 hours each time, centrifuge the extract after each extraction to obtain supernatant, combine each extraction The obtained supernatant was concentrated and freeze-dried to obtain a powdered aqueous tea extract. The freeze-drying time was 16 hours, and the cold trap temperature was -40°C;

[0053] 2. The concentration of each configuration is 100mg·L -1 Tea water extra...

Embodiment 55-90

[0058] This embodiment prepares the water extract of tea leaves and the water extract of pomelo peel in the same manner as in Example 37-54;

[0059] The concentration of tea and pomelo peel water extract solution is 100mg·L -1 , Cu 2+ The pH of the solution is 5, and the concentration is 10mg L -1 , take 10mL of water extract solution into a dialysis bag, clamp both ends with dialysis clips, put 50ml of Cu 2+ In the solution (the molar mass ratio is 7.8125mol / kg), oscillate on a reciprocating shaker (220r / min) at a constant temperature (25°C), and the sampling and measurement times are 10, 30, 60, 100, 120, 240, 360, 720 , 1440min, repeated three times. The results showed that in this case, the adsorption capacity of tea water extract to copper ions was 107.50mg / g, 156.55mg / g, 145.95mg / g, 139.65mg / g, 151.50mg / g, 153.22mg / g respectively. The adsorption capacity of the water extract of pomelo peel to copper ions is 68.85mg / g, 91.80mg / g, 112.35mg / g, 119.50mg / g, 116.34mg / g, 1...

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Abstract

The invention discloses an application and adsorption method of tea water extract or peel water extract for adsorbing heavy metal ions. The method is characterized by including the following steps: adding water in the tea water extract or shaddock peel water extract to prepare an aqueous extract solution, filling the aqueous extract solution in a dialysis bag, regulating the pH of a heavy metal ion solution to acidity, and then soaking the dialysis bag in the heavy metal ion solution. In the method disclosed by the invention, natural wastes tea dust and shaddock peel are utilized, the tea water extract or shaddock peel water extract is used for adsorbing the heavy metal ions in wastewater, which belongs to waste utilization, so that the cost is low; compared with other natural adsorbents, the tea dust and the shaddock peel need no special treatment, the preparation process of the aqueous extracts are simple, and the operation is convenient; the tea dust and the shaddock peel have no ecotoxicity, thereby generating no secondary pollution; more importantly, the tea water extract or shaddock peel water extract in the invention has excellent adsorption properties on the heavy metal ions, and can be applied to the treatment of wastewater discharged in such fields as electroplating industry, plastic industry, electronic industry, mining and the like.

Description

technical field [0001] The invention relates to the application of tea water extract or pomelo peel water extract in absorbing heavy metal ions and a method for using tea leaf water extract or pomelo peel water extract to absorb heavy metal ions. Background technique [0002] With the development of industrial technology, the pollution of heavy metal ions in industrial wastewater has become increasingly serious. Its soluble salt pollutes the oceans, rivers, lakes and farmland in nature with the discharge of sewage. If it is not controlled, it will threaten human health and survival. Copper is an element frequently used in industry, and copper ion pollution has also become a key issue of global concern. The National Comprehensive Sewage Discharge Standard clearly stipulates that the primary discharge standard for copper wastewater is that the total copper content is less than 5.0 mg / L, and the water quality standard for farmland irrigation is that the total copper content is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/62
Inventor 陈龙胜陈世金许舒雯
Owner 安徽省应用技术研究院
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