Method for removing psychoactive substances in sewage through cooperation of flocculation and photocatalysis

An active material and photocatalytic technology, applied in the fields of flocculation/sedimentation water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc.

Pending Publication Date: 2022-06-24
上海迪安司法鉴定有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few methods for targeted removal of drugs in domestic sewage by advanced oxidation technology, which mainly focus on the development of removal methods for organic dyes, antibiotics, pesticides and veterinary drugs, and most of the existing methods are only for single target psychoactive substances The simulated sewage removal

Method used

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  • Method for removing psychoactive substances in sewage through cooperation of flocculation and photocatalysis
  • Method for removing psychoactive substances in sewage through cooperation of flocculation and photocatalysis
  • Method for removing psychoactive substances in sewage through cooperation of flocculation and photocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1. Establishment of analytical method

[0081] 1.1 Standard preparation

[0082] Take the 1 mg / mL stock solution of the standard substances ketamine, norketamine, cocaine, benzoylecgonine, methamphetamine and amphetamine, and use methanol to prepare a 10 μg / mL mixed standard solution for later use.

[0083] 1.2 Substance Abbreviation Comparison Table

[0084] A comparison table of the abbreviations of the psychoactive substances used in the present invention is shown in Table 1 below.

[0085] Table 1

[0086]

[0087]

[0088] 1.3 Analysis and calculation method: single-point quantitative method

[0089] According to the peak area of ​​the target quantitative ion pair in the sample to be tested and the blank added sample, the mass concentration of the target substance in the sample to be tested is calculated according to the following formula.

[0090]

[0091] C The concentration of the target substance in the sample to be tested, in nanogra...

Embodiment 2

[0102] Example 2. Determination of reaction sequence

[0103] Take 3 actual sewage samples and add 10 μg / mL mixed standard solutions of different volumes, respectively, so that the final concentrations are 100 ng / mL, 50 ng / mL, 25 ng / mL, and the numbers are 1, 2, and 3.

[0104] Take 500mL of each of the above 1, 2, and 3 water samples into the primary reaction tank, and then divide them into AB groups, a total of 6 groups, numbered A-1, B-1, A-2, B-2, A -3, B-3. Each group was performed in triplicate.

[0105] Three water samples in group A were added with 5g flocculant (including iron glycinate chelate, manganese sulfate and glucose), and air was aerated to assist flocculation. After 1 hour, filter cotton was placed at the water outlet, and the water valve was opened. Put the water sample into the secondary reaction tank, and add 5g nanometer titanium dioxide powder (particle size 2 / g, crystal form: anatase), aeration is carried out by passing air, and irradiation is carri...

Embodiment 3

[0114] Example 3. Effect of single treatment and co-treatment on removal effect

[0115] After determining the sequence of reactions, this example investigates the effects of single flocculation, single photocatalysis, and flocculation combined with photocatalysis treatment on the removal rates of six target substances in sewage.

[0116] Take the actual sewage samples, add the above 10μg / mL mixed standard solutions respectively, so that the final concentration is 100ng / mL, respectively, take 500mL of the above water samples into the first-level reaction tank, and divide them into ABC groups, each group is divided into three groups in parallel. copy operation.

[0117] Single flocculation: Add 5g of flocculant to the water samples of group A, and aerate the water samples to assist flocculation. After one hour, the water samples were centrifuged at 4,000 rpm for 5 min. Min centrifugation for 5 min, take the supernatant through a 0.22 μm filter, and take 5 μL for LC-MS / MS analy...

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Abstract

The invention provides a method for removing psychoactive substances in sewage. Specifically, the invention provides a flocculation and photocatalysis cooperated removal method, which comprises the following steps: firstly, mixing sewage containing psychoactive substances with a flocculant, and carrying out flocculation to obtain a mixed solution; then mixing the mixed solution with a photocatalyst, irradiating under ultraviolet light, and carrying out photocatalytic removal; wherein the mental active substance is selected from the following group: ketamine, norketamine, cocaine, benzoyl ekangning, methylamphetamine, amphetamine, or a combination thereof. The method provided by the invention can be used for simultaneously removing various mental active substances and has an excellent removal effect.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for removing psychoactive substances in sewage by flocculation and photocatalysis. Background technique [0002] The main sources of new psychoactive substances and their metabolites in the water environment are the excrement of drug abusers or illegally discharged during the drug production process, etc., and enter the local wastewater treatment system through the sewers. The actual concentration of cocaine and its metabolites detected in urban wastewater is 4ng / L to 4.7μg / L and 9ng / L, respectively. to 7.5 μg / L, while amphetamine-type stimulants range from 2 ng / L to 688 ng / L. When psychoactive substances enter the water environment, they will have certain biological toxicity to aquatic organisms. Studies have shown that amphetamines can affect the growth and reproduction of algal catecholamines in the aquatic environment by affecting the production of catech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/32C02F1/56C02F1/5236C02F1/001C02F2001/007C02F3/00C02F1/54
Inventor 彭亮刘少丹闵涛薛晓娟李艳梅付双洋
Owner 上海迪安司法鉴定有限公司
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