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Method for removing high concentration phosphor pollution in alkali wastewater

A phosphorus pollution, high concentration technology, applied in the direction of chemical instruments and methods, water/sewage multi-stage treatment, adsorption water/sewage treatment, etc., can solve the problems that are not conducive to the application of calcite to remove phosphorus, and achieve good application prospects and operation The effect of convenience and cheap raw materials

Inactive Publication Date: 2013-06-05
SUZHOU UNIV OF SCI & TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pH value is under alkaline conditions, and the efficiency of calcite to remove high-concentration phosphorus changes with the change of pH value, which is not conducive to the application of calcite to remove phosphorus

Method used

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  • Method for removing high concentration phosphor pollution in alkali wastewater
  • Method for removing high concentration phosphor pollution in alkali wastewater
  • Method for removing high concentration phosphor pollution in alkali wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The adsorption experiment was carried out at room temperature (25°C), and the NaH 2 PO 4 The stock solution was dissolved in 0.01M NaCl solution, and the amount of adsorbent was 5 g / L, so that the initial concentration of P in the solution was set at 16.13mM; then a series of 50ml centrifuge tube water samples were placed on the rotary mixer, and the reaction equilibrium time for 7 hours, and then placed in a centrifuge at 4000r / min for 10 minutes, the supernatant was taken, and the concentration of P in the water sample was analyzed by an ultraviolet spectrophotometer.

[0049] Such as figure 1 As shown, it shows the XRD characterization of aragonitic calcium carbonate synthesized according to different ratios of calcium and magnesium. The characteristics of calcium carbonate type, the XRD characterization diagram of the adsorbent with a Ca / Mg ratio of 6:2 shows that the characteristics of aragonitic calcium carbonate have become less obvious, and the XRD of the adso...

Embodiment 2

[0052] The adsorption isotherm experiment was carried out at room temperature (25°C), pH=10.0±0.3, by the adsorption experiment method, and the NaH 2 PO 4 The stock solution was dissolved in 0.01M NaCl solution, and the amount of adsorbent was 5 g / L, so that the initial concentration of P in the solution was set at 0-16.13mM; then a series of 50ml centrifuge tube water samples were placed on the rotary mixer, The reaction equilibrium time is 7 hours, and then placed in a 4000r / min centrifuge for 10 minutes, the supernatant is taken, and the concentration of P in the water sample is analyzed by an ultraviolet spectrophotometer.

[0053] Figure 4 Shown is the maximum adsorption capacity of phosphate in water by comparing the adsorbent doped with magnesium (Ca / Mg ratio of 6:2) and the adsorbent without magnesium doped through adsorption experiments. Through the simulation analysis of the experimental results, the adsorption isotherm of phosphorus by the adsorbent without dopin...

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Abstract

The invention discloses a method for removing high concentration phosphor pollution in alkali wastewater, which comprises the following steps: Step1) synthesizing a magnesium doped aragonite (Mg / CaCO3) type calcium carbonate nano adsorbent; step2)adding the magnesium doped aragonite type calcium carbonate adsorbent in the water containing phosphor; step3) effecting the adsorbent in a solution for more than 4 hours; and step4) standing for a segment of time, and depositing the synthesized magnesium doped aragonite type calcium carbonate adsorbent particles to remove phosphor in the aqueous solution. The invention provides the method for removing the high concentration phosphor in alkali wastewater, the pollution clearance of high density phosphor (the concentration is 500mg / L) in the alkali wastewater can reach more than 80%, the foundation of the water environment purification and resource reutilization can be established, and the method for removing high concentration phosphor pollution in alkali wastewater has good economic and social benefit.

Description

technical field [0001] The invention relates to the technical field of inorganic nanometer material preparation and water purification environment protection, in particular to a method for removing high-concentration phosphorus pollution in alkaline wastewater. Background technique [0002] The harm of water eutrophication is threatening the sustainable development of human society. Phosphorus (P) element is identified as one of the most dangerous factors affecting the quality of water environment, because excessive phosphorus in water can promote the growth of aquatic plants, which can easily lead to the decline of water quality. According to surveys, the total phosphorus concentration in lakes and reservoirs in my country is 0.018-0.97mg / L, which is generally higher than the 0.02mg / L standard for eutrophication of water bodies. The phosphorus concentration in the actual industrial phosphorus-containing wastewater is much higher than this standard. For example, the concent...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/28
Inventor 徐楠印红伟陈明
Owner SUZHOU UNIV OF SCI & TECH
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