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Coated nano iron ball as well as preparation and application thereof

A technology of nano-iron and small balls, which is applied in the preparation of microspheres, microcapsule preparations, transportation and packaging, etc., which can solve the problems of easy oxidation of nano-iron, difficulty in recycling, and reduced activity, so as to achieve the goal of not being easily oxidized and reducing production costs , the effect of activity improvement

Inactive Publication Date: 2016-06-22
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are some problems when using green synthetic nano-iron for pollutant treatment: 1) Nano-iron is easily oxidized in the air, resulting in reduced activity; 2) It is difficult to recover nano-iron after it is applied to pollutant treatment

Method used

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  • Coated nano iron ball as well as preparation and application thereof
  • Coated nano iron ball as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of embedded nano-iron: Wash fresh eucalyptus leaves with distilled water, dry naturally, crush them, and pass through a 40-mesh sieve; weigh 60 grams of leaf powder, add it to 1L of distilled water, and heat it in a water bath at 353K; After 1h, vacuum filter again, put the filtrate in a conical flask for later use; measure 50mL of eucalyptus extract, slowly add 1.125g of sodium alginate into it and keep stirring until the sodium alginate is completely dissolved to obtain sodium alginate Sol; stand for 30min, remove the air bubbles in the sol, and then add the newly prepared 25mL0.1mol L -1 The ferrous sulfate solution was slowly added dropwise to the sol while stirring continuously. After the solution was added dropwise, the stirring was continued for 5 minutes to obtain the sodium alginate-coated nano-iron sol; the sol was dripped into 1.33mol L -1 CaCl 2 solution, and constantly stirred with a glass rod, the sodium alginate-coated nano-iron sol in CaCl ...

Embodiment 2

[0025] Preparation of embedded nano-iron: Wash fresh mulberry leaves with distilled water, dry them naturally, crush them, and pass through a 40-mesh sieve; weigh 60 grams of leaf powder, add it to 1 L of distilled water, and heat it in a water bath at 80°C; After heating for 1 hour, vacuum filter again, and put the filtrate in a conical flask for later use; measure 50mL of eucalyptus extract, slowly add 1.125g of sodium alginate into it and keep stirring until the sodium alginate is completely dissolved to obtain alginic acid Sodium sol; let it stand for 30min, remove the air bubbles in the sol, and then add the newly prepared 25mL0.1mol·L -1 The ferrous sulfate solution was slowly added dropwise to the sol while stirring continuously. After the solution was added dropwise, the stirring was continued for 5 minutes to obtain the sodium alginate-coated nano-iron sol; the sol was dripped into 1.33mol L -1 CaCl 2 solution, and constantly stirred with a glass rod, the sodium algi...

Embodiment 3

[0027] Preparation of embedded nano-iron: wash fresh tea tree leaves with distilled water, dry naturally, crush them, and pass through a 40-mesh sieve; weigh 60 grams of leaf powder, add to 1L of distilled water, and heat in a water bath at 80°C; After heating for 1 hour, vacuum filter again, and put the filtrate in a conical flask for later use; measure 50mL of eucalyptus extract, slowly add 1.125g of sodium alginate into it and keep stirring until the sodium alginate is completely dissolved to obtain alginic acid Sodium sol; let it stand for 30min, remove the air bubbles in the sol, and then add the newly prepared 25mL0.1mol·L -1 The ferrous sulfate solution was slowly added dropwise to the sol while stirring continuously. After the solution was added dropwise, the stirring was continued for 5 minutes to obtain the sodium alginate-coated nano-iron sol; the sol was dripped into 1.33mol L -1 CaCl 2 solution, and constantly stirred with a glass rod, the sodium alginate-coated ...

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Abstract

The invention discloses a coated nano iron ball as well as preparation and application thereof. A preparation method of the coated nano iron ball comprises the following steps: firstly reducing ferrous ions to nano zero-valent iron via reducing agents such as phenols and the like in a tree leaf extraction solution to form a nano iron suspension, preparing the nano iron suspension into calcium alginate via a calcium alginate coating technology so as to coat the nano iron ball. The nano iron ball and hydrogen peroxide are prepared into a Fenton-type reagent; hydroxyl radicals can be released; the coated nano iron ball has strong oxidizability and is capable of mineralizing oily substances in the wastewater to achieve the purpose of deeply treating the wastewater. The method has the advantages of low cost, excellent effect, convenience in use and environment friendliness.

Description

technical field [0001] The invention relates to the field of oily wastewater treatment, in particular to an embedded nano-iron pellet and its preparation and application. Background technique [0002] With the steady growth of my country's oil demand and the continuous increase of domestic oil extraction, a large amount of oily wastewater is produced during the processing, refining, storage and transportation of oil and oil products, causing serious environmental pollution problems. According to statistics, my country's annual oil refining waste water contains 600,000 tons of waste oil, all of which are discharged into the soil and rivers. At present, the treatment methods of oily wastewater mainly include gravity method, flocculation method, air flotation method, and electrochemical method, which have problems such as high processing cost, slow sedimentation speed, flocculant residue, high energy consumption, and large floor area; another The more commonly used method is t...

Claims

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Application Information

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IPC IPC(8): B01J13/02C02F1/40C02F1/72B22F9/24B22F1/02
CPCB01J13/02C02F1/40C02F1/722B22F9/24C02F2101/32C02F2305/026B22F1/16
Inventor 金晓英陈祖亮黄超林加奖
Owner FUJIAN NORMAL UNIV
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