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Method for removing high-concentration dimethyl phthalate through radiation

A dimethyl phthalate, high-concentration technology, which is applied in the field of water treatment, can solve the problems such as the operation method of PAEs removal in the water that has not been given, and achieve the effect of strong penetrating power

Inactive Publication Date: 2011-10-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] These studies are only a general study of the radiation degradation effect of PAEs, and do not give a feasible and practical removal method for PAEs in water, let alone the radiation removal method for high-concentration (>300mg / L) PAEs.

Method used

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  • Method for removing high-concentration dimethyl phthalate through radiation
  • Method for removing high-concentration dimethyl phthalate through radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The aqueous solution of dimethyl phthalate with a concentration of 5000mg / L is put into a metal container, treated with γ-ray radiation with an absorbed dose of 16kGy, and after the treatment, the turbid solution is centrifuged for 20 minutes with a centrifugal force of 10000×g, and the upper layer is poured out liquid, remove the sediment, and obtain a water quality with a removal rate of dimethyl phthalate of 96.1%.

Embodiment 2

[0031] The aqueous solution of dimethyl phthalate with a concentration of 3000mg / L is put into a glass container and treated with X-ray radiation with an absorbed dose of 20kGy. After the treatment, the turbid solution is centrifuged for 20 minutes with a centrifugal force of 10000×g, and the upper layer is poured out Liquid, remove sediment, obtain the water quality that the dimethyl phthalate removal rate is 96.0%. Give example 3:

Embodiment 3

[0032] Put the aqueous solution of dimethyl phthalate with a concentration of 1500mg / L into the container or flow into the pipeline, and treat it with gamma-ray radiation with an absorbed dose of 30kGy. After the treatment, centrifuge the turbid solution for 20 minutes, and pour it over The supernatant was removed, and the sediment was removed to obtain a water quality with a dimethyl phthalate removal rate of 96%.

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Abstract

The invention discloses a method for removing high-concentration dimethyl phthalate through radiation. In the method, the dimethyl phthalate at the concentration of 300 to 5,000 mg / L is subjected to high-dose radiation treatment by high-energy rays; and then solid substances are separated and removed from the solution. By the method, the removal rate of the dimethyl phthalate is over 95 percent; radiation degradation products can be removed directly; chemical aids are not required; and energy is saved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for treating plasticizer waste water, that is, high-concentration dimethyl phthalate waste water. Background technique [0002] Phthalic acid esters (Phthalic acid esters, or Phthalates, referred to as PAEs, also known as phthalates) are one of the most important endocrine disruptors in the water environment. In industry, PAEs compounds are mainly used as plasticizers and softeners for plastic products, and the addition amount in PVC and polyethylene plastic products reaches 20% to 50%. One of the synthetic organic compounds. [0003] PAEs are a class of compounds, the main members of which are DMP, DEP, DBP, DOP, DEHP and BBP. In August 1998, the U.S. EPA announced 67 kinds (types) of environmental endocrine disruptors that endangered human body and organisms screened from 86,000 kinds of commercial chemicals, and PAEs were officially included in it. China'...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/58
Inventor 赵永富郑正罗艳张继彪袁守军
Owner NANJING UNIV
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