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Method for eliminating phthalic monoester-type environmental hormone in water body

A technology based on environmental hormones and phthalic acid alone, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of fast removal rate, easy regeneration and reuse of adsorbents, and large adsorption capacity, and achieve removal Fast efficiency, good regeneration effect, and large saturated adsorption capacity

Inactive Publication Date: 2012-10-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing water body phthalic acid monoester removal technology, and to provide a method for removing phthalic acid monoester environmental hormones in water bodies with fast removal rate, large adsorption capacity and easy regeneration and reuse of adsorbents. method

Method used

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  • Method for eliminating phthalic monoester-type environmental hormone in water body

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Embodiment 1

[0022] After filtering 20 L of monomethyl phthalate wastewater with a concentration of 500 mg / L, adjust the pH to 3 with 0.1 mol / L hydrochloric acid, and add 200 g goethite to it to make the concentration reach 10 g / L. Stir the reaction at 1790rmp / min for 24 hours at 5°C, filter out the goethite after the adsorption reaches equilibrium, add it to 0.7L sodium hydroxide solution with a concentration of 1mol / L, and add it to 500 After stirring and desorbing at the speed of rpm / min for 4 hours, the goethite was filtered out, washed with distilled water until neutral, dried at 50°C for 8 hours, and then recycled and reused. The desorption liquid is recycled as a desorption agent. The concentration of monomethyl phthalate in the treated wastewater was 0.08 mg / L.

Embodiment 2

[0024] After 20L of monoethyl phthalate wastewater with a concentration of 400mg / L was filtered, the pH was adjusted to 3 with 0.1mol / L hydrochloric acid, and 140 g of goethite was added thereto to make its concentration reach 7 g / L. Under the temperature condition of ±5°C, stir the reaction at a speed of 1000rmp / min for 24h. After the adsorption reaches equilibrium, filter out the goethite, add it to 0.5L of sodium hydroxide solution with a concentration of 1mol / L, and set the temperature at 25°C to After stirring and desorbing at a speed of 500 rpm / min for 4 hours, the goethite was filtered out, washed with distilled water until neutral, dried at 50°C for 8 hours, and then recycled and reused. The desorption liquid is recycled as a desorption agent. The concentration of monoethyl phthalate in the treated wastewater was 0.07 mg / L.

Embodiment 3

[0026] After 20L of monobutyl phthalate wastewater with a concentration of 300mg / L was filtered, the pH was adjusted to 4 with 0.1mol / L hydrochloric acid, and 100 g of goethite was added thereto to make its concentration reach 5 g / L. Under the temperature condition of ±5°C, stir the reaction at a speed of 1000 rpm / min for 24 hours. After the adsorption reaches equilibrium, filter out the goethite, add it to 0.4L of sodium hydroxide solution with a concentration of 1mol / L, and store at 40°C After stirring and desorbing at a speed of 300rmp / min for 4h, the goethite was filtered out, washed with distilled water to neutrality, dried at 50°C for 8h, and then recovered and reused. The desorption liquid is recycled as a desorption agent. The concentration of monobutyl phthalate in the treated wastewater was 0.05 mg / L.

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Abstract

The invention discloses a method for eliminating phthalic monoester-type environmental hormone in a water body. The method includes: filtering the water body polluted by the phthalic monoester-type environmental hormone, and adjusting pH value to 3-5; adding goethite to the filtered water body, and mixing for 8-24 hours at a speed of 570-1790 rmp / min to achieve adsorption equilibrium; filtering the water body in adsorption equilibrium, and separating the goethite absorbing the phthalic acid monoester to obtain purified water, wherein concentration of the goethite in the water body is 0.1-10g / L. The method for eliminating the phthalic monoester-type environmental hormone in the water body is fast in eliminating speed and high in absorption amount, and the goethite after absorption is easy to regenerate after desorption and can be reused.

Description

technical field [0001] The invention relates to a method for removing phthalic acid monoester environmental hormones in water, in particular to a method for removing phthalic acid monoester environmental hormones in water by adsorption of goethite. Background technique [0002] Phthalic acid monoesters, also known as phthalic acid monoesters, are hydrolysis products of a class of environmental hormone phthalate pollutants that have received widespread attention. Its molecular structure is as figure 1 . Relevant studies have shown that phthalic acid monoesters have reproductive toxicity, endocrine disruptor, carcinogenicity, teratogenicity and mutagenicity to the human body, and are 10 times the reproductive toxicity of corresponding phthalate environmental hormones. Phthalate monoesters in the water environment mainly come from the degradation of corresponding phthalate environmental hormones, and the more common ones include monomethyl phthalate (MMP), monobutyl phthala...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/58C02F101/34
Inventor 许正文承玲陆建刚朱文飞陈敏东史静方华唐登勇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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