Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of magnetic γ-fe from ferromanganese mud 2 o 3 Method for removing arsenic in water by adsorption material

A technology for adsorbing materials and removing water, which is applied in the fields of adsorbed water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc. It can solve the problems of difficulty in recovering adsorbents, and achieve cost saving and high recovery efficiency. , the preparation method is simple

Active Publication Date: 2020-09-25
BEIJING UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recent experiments have shown that the iron-manganese mud powder obtained by drying, grinding and sieving the iron-manganese mud obtained from the backwashing of the iron-manganese removal filter in the groundwater plant has a good adsorption effect when used directly for arsenic removal. There are some unavoidable defects in the removal of arsenic in water, for example, it is difficult to separate from water after treatment due to its physical form, which makes it difficult to recover the adsorbent, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation of magnetic γ-fe from ferromanganese mud <sub>2</sub> o <sub>3</sub> Method for removing arsenic in water by adsorption material
  • Preparation of magnetic γ-fe from ferromanganese mud <sub>2</sub> o <sub>3</sub> Method for removing arsenic in water by adsorption material
  • Preparation of magnetic γ-fe from ferromanganese mud <sub>2</sub> o <sub>3</sub> Method for removing arsenic in water by adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Implementation example 1: The biofilter backwash wastewater in the stable operation stage of the iron and manganese removal water supply plant was left to settle for 24 hours, and the bottom sludge was dried for subsequent use. The Fe element atomic ratio of the sludge was 86.6%; it was measured with a graduated cylinder Put 60mL of ethylene glycol in a beaker, add 2.0g of iron-manganese mud and 11.0g of anhydrous sodium acetate to dissolve in ethylene glycol in turn, stir for 45min to make a uniform suspension, put the obtained suspension into a closed The reaction kettle was heated to 180°C and reacted at a constant temperature for 10 hours; after the reaction kettle was naturally cooled to room temperature, the upper liquid was discarded, and the bottom sediment was taken out, washed alternately with ethanol and water for 6 times, and the magnetic substance was removed from the Separated from water; put the obtained magnetic substance in a desiccator, set the temperat...

Embodiment 2

[0019] Implementation example 2: the biofilter backwash wastewater in the stable operation stage of the iron and manganese removal water supply plant was left to settle for 24 hours, and the bottom sludge was dried for subsequent use. The Fe element atomic ratio of the sludge was 80.5%; it was measured with a graduated cylinder Put 40mL of ethylene glycol in a beaker, add 1.2g of iron sludge and 6.5g of anhydrous sodium acetate to dissolve in ethylene glycol, stir for 30min to make a uniform suspension, put the obtained suspension into a closed reaction The reactor was heated to 200°C and reacted at a constant temperature for 12 hours; when the reactor was naturally cooled to room temperature, the upper liquid was discarded, and the sediment at the bottom was taken out, washed with ethanol and water alternately for 8 times, and the magnetic substance was removed from the water by a magnet. Separation; put the obtained magnetic substance in a desiccator, set the temperature at 5...

Embodiment 3

[0020] Implementation example 3: the above-mentioned magnetic γ-Fe 2 o 3 Adsorbents are used for the removal of arsenic in water. Add 10 mL of 30% by volume hydrogen peroxide to 90 mL of As(III)-containing aqueous solution to obtain a series of arsenic solutions with concentrations ranging from 0.01 mg / L to 40 mg / L. The pH of the solution is 6.3-6.8, within the range of 3-10, no pH regulator is needed. Magnetic γ-Fe 2 o 3 The powder adsorbent is added to the pretreated arsenic-containing water, the dosage is 0.2g / L, 25°C is shaken for 24 hours, and the adsorbent is separated from the water by a magnet. The adsorption capacity of the adsorbent to arsenic in water and the fitting curve of Langmuir and Freundlish isotherm model are as follows: image 3 As shown, the maximum adsorption capacity can reach 8.7mg / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a magnetic gama-Fe2O3 absorbing material by ferrimanganic mud for removing arsenic in the water. The method applies a solvothermal synthesis method to prepare the sludge obtained by reversely flushed by a biological deironing and manganese removing filter pond of an underground water plant to be the magnetic gama-Fe2O3 material. The material has goodarsenic absorbing effect, and separate arsenic from water conveniently by the magnet, and the material can be recycled. The absorbing material can recycle the water treatment waste and remove arsenicpollutants in the water, thus the sludge disposal problem of the water plant is solved, and the iron element enriched in the sludge can be fully used as a resource. The preparation method saves drug cost and has great realistic significance.

Description

Technical field: [0001] The invention belongs to the field of environmental water treatment, in particular to a method for preparing magnetic γ-Fe by using ferromanganese mud 2 o 3 A method for removing arsenic from water by adsorbent materials. Background technique: [0002] Arsenic is a common toxic metalloid element in nature, which can enter the human body through drinking water or through the skin, digestive tract, respiratory tract and other ways. Long-term drinking of high-arsenic water (>50μg / L), arsenic will accumulate in the human body for a long time, causing lesions in the skin, lungs, liver, kidneys, bladder and other organs, with the risk of teratogenic and carcinogenic. At present, the commonly used technical methods for removing arsenic in water treatment include coagulation precipitation method, adsorption method, biological arsenic removal method, membrane separation method, ion exchange method and so on. As a simple, effective, and easy-to-operate ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28
CPCB01J20/06B01J20/28009B01J20/30B01J2220/4887C02F1/281C02F2101/103
Inventor 曾辉平尹灿李冬张杰
Owner BEIJING UNIV OF TECH