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Preparation method of solidago canadensis carbon-based phosphorus removal adsorbent and application

A technology of phosphorus adsorbent and yellow flower charcoal, which is applied in the field of water treatment, can solve the problems of low utilization rate of effective active adsorption sites of lanthanum hydroxide, low adsorption capacity, poor acid and alkali resistance, etc., and achieve high specific selectivity and Anti-interference ability, simple process and low cost

Inactive Publication Date: 2019-03-19
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of low adsorption capacity, high cost, poor acid and alkali resistance, and low utilization rate of effective active adsorption sites of lanthanum hydroxide in existing adsorbents for phosphorus removal, the present invention aims to provide a canadensis charcoal-based phosphorus removal adsorbent The preparation method realizes the resource utilization of solidago canadensis while preparing high-efficiency phosphorus removal adsorbent

Method used

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  • Preparation method of solidago canadensis carbon-based phosphorus removal adsorbent and application
  • Preparation method of solidago canadensis carbon-based phosphorus removal adsorbent and application
  • Preparation method of solidago canadensis carbon-based phosphorus removal adsorbent and application

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Effect test

Embodiment 1

[0038] The preparation method of S. canadensis charcoal-based phosphorus removal adsorbent, the steps are as follows:

[0039] Step 1. After drying Solidago canadensis naturally, remove its branches and leaves and keep the stems, use a pulverizer to crush to 100-150 mesh, then raise the temperature to 700°C at 10°C / min in a nitrogen atmosphere, and carbonize for 2 hours. Naturally cool down to room temperature to obtain the Canadian solidago charcoal, which is denoted as SCC.

[0040] Step 2. Add 3.0 g of the canadensis charcoal obtained in step 1 to a mixed solution of 200 mL of absolute ethanol and distilled water (v / v=1:5), add 5.57 g of lanthanum chloride heptahydrate, and mix evenly by ultrasonication. Take 20wt.% sodium hydroxide solution to adjust the pH to 10.0-11.0, first react at 60°C for 2 hours, and then continue to react at room temperature for 24 hours. After the reaction product is cooled, it is fully washed and vacuum-dried to obtain nano-lanthanum hydroxide mo...

Embodiment 2

[0042] The SCC-La(OH)O charcoal SCC-La(OH)O modified by nano-lanthanum hydroxide synthesized in Example 1 was used as an adsorbent to adsorb and treat phosphorus-containing water. The specific adsorption process is as follows: Static adsorption is carried out in a 40mL EPA bottle with a polytetrafluoroethylene gasket. The mass ratio of the adsorbent to the phosphate-containing water can be selected from a range of 1:800 to 2000. The ratio selected in this embodiment It is 1:800, pH=6.0±0.2, the initial concentration of phosphorus is 120.70mg P / L, the water body does not contain NaCl, the adsorption temperature is 25°C, and the adsorption time is 36h. After adsorption equilibrium, it was filtered through a 45 μL aqueous filter head, and the concentration of phosphorus in the filtrate was measured at 700 nm by molybdenum blue colorimetry. The measured adsorption capacity (calculated as phosphorus) is 56.40 mg P / g, and the adsorption capacity after normalizing the actual lanthanu...

Embodiment 4

[0047] The adsorption conditions were the same as in Example 2, wherein the initial phosphorus concentration was 2.08 mg P / L, and the phosphorus content in the solution had dropped to 14 μg P / L after 1 minute of adsorption.

[0048]It can be seen that for the treatment of low-concentration phosphorus components, the adsorbent can achieve ultra-fast discharge standards (50 μg P / L) of the US Environmental Protection Agency (USEPA) and the first grade in my country's "Integrated Wastewater Discharge Standard" (GB8978-1996). Emission standard (0.5mg P / L).

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Abstract

The invention discloses a preparation method of a solidago canadensis carbon-based phosphorus removal adsorbent and an application. The preparation method comprises the following steps: performing high temperature carbonization on invasive solidago canadensis in an inert atmosphere, performing ultrasonic dispersion in ethanol water, adding lanthanum chloride, and preparing a nano-lanthanum hydroxide modified solidago canadensis carbon-based phosphorus removal adsorbent by an impregnation method. The foreign invasive solidago canadensis serves as a matrix material of the phosphorus removal adsorbent, and is subjected to carbonization and functional modification to be applied to treatment of phosphorus containing water. The adsorbent is mild in preparation condition, simple in process and low in energy consumption, has an obvious phosphorus removal effect, and also has high specific selectivity and interference resistance; the reproducible solidago canadensis serves as the matrix material, so that material selection is convenient, and the cost is low; and a recycling pathway is provided for control of the solidago canadensis.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method and application of a solidago charcoal-based high-efficiency phosphorus removal adsorbent. Background technique [0002] Solidago canadensis is one of the most destructive invasive alien plants. It is native to North America and is a perennial herb of the Asteraceae family. It reproduces both sexually and asexually through seeds and rhizomes. It was introduced as a garden ornamental flower in 1935 my country. It has strong vitality, temperature-loving, fertilizer-resistant, drought-resistant, high-temperature-resistant, low-temperature-resistant, long growth cycle, and strong stress resistance; it is easy to form a single superior community in the natural environment, destroying the ecological balance; affecting the growth of crops, reducing Yield and quality of agricultural products. At present, the prevention and control measures for S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28C02F101/10
CPCB01J20/06B01J20/20C02F1/281C02F1/283C02F2101/105
Inventor 宗恩敏李钧敏王江姚俊蒋胜韬朱华跃沈媛媛刘晓欢
Owner TAIZHOU UNIV
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