Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of high-efficiency antimony removal adsorbent and its application in printing and dyeing wastewater treatment

A printing and dyeing wastewater and adsorbent technology, which is applied in the field of water pollution treatment, can solve the problems of difficult to achieve standard discharge, low antimony efficiency and capacity, etc., and achieve the effects of stable and efficient preparation of materials, reduction of iron dissolution, and simple and easy preparation methods

Inactive Publication Date: 2020-06-26
ZHEJIANG UNIV
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that the efficiency and ability of the existing process for treating antimony in current printing and dyeing wastewater are relatively low, and it is difficult to achieve standard discharge, and utilizes the specific adsorption characteristics of amorphous iron oxide on antimony and the special structure and framework of mesoporous silica , using the sol-gel-microemulsion method to synthesize a high-efficiency antimony removal adsorbent (self-assembled porous and stable amorphous iron oxide-silica composite material) in one step, and used it for the adsorption and removal of antimony in printing and dyeing wastewater, and at the same time Realize the recycling of adsorption materials and the concentration of antimony

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 method of high-efficiency antimony removal adsorbent and its application in printing and dyeing wastewater treatment
  • Preparation method of high-efficiency antimony removal adsorbent and its application in printing and dyeing wastewater treatment
  • Preparation method of high-efficiency antimony removal adsorbent and its application in printing and dyeing wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation of the ODTMS type amorphous iron oxide-silicon dioxide composite material that the molar ratio of iron to silicon is 5:1

[0034] Weigh 0.8332g TEOS (tetraethyl orthosilicate) and 0.3747g octadecyltrimethoxysilane (Octadecyltrimethoxysilane, ODTMS) (both silicon molar ratio is 4:1) and dissolve them in 200mL absolute ethanol and 20ml water The mixed solution was added into a 1000mL three-hole flask, fixed in a constant temperature water tank to adjust the temperature to 60°C, and stirred at a speed of 300r / min for 10min. At the same time, 20g of 27%wt concentrated ammonia water was also weighed and added to a 100mL constant pressure funnel, and the ammonia solution was added dropwise until a white precipitate was produced; 50mL of FeCl with a molar concentration of 0.5M 3 After the solution is mixed evenly, it is added to a 100mL constant pressure funnel, and after 5 minutes of white precipitation, FeCl is added dropwise. 3 solution, while...

Embodiment 2

[0037] Example 2: Preparation of amorphous iron oxide-silicon dioxide composite material with different iron-silicon molar ratios and adsorption of antimony

[0038] According to the method for preparing iron-silicon composite materials in Example 1, composite materials with iron-silicon molar ratios of 1:1, 5:1, 10:1 and 20:1 were prepared respectively by changing the amount of iron salt added, and other preparations The conditions are the same as in Example 1. Then, the prepared iron-silicon composite material was used to adsorb antimony in water to explore the adsorption capacity of the composite material for antimony. Firstly, composite materials with different iron-silicon molar ratios were used to conduct a preliminary adsorption comparison of antimony solutions with an initial concentration of 200 μg / L (Table 1). %, while the antimony removal rate of the composite material with a molar ratio of iron to silicon of 5:1 is as high as 95%, indicating that too much silicon ...

Embodiment 3

[0042] Example 3 Preparation of CTAB amorphous iron-silicon composite material with iron-silicon molar ratio of 5:1

[0043] The templating agent octadecyltrimethoxysilane in embodiment 1 is changed to hexadecyltrimethylammonium bromide CTAB, and the addition amount of TEOS is 1.0416g, and the addition amount of CTAB is 5g, and other preparation steps and iron solution Concentration and capacity are all identical with step and embodiment 1. The sintering condition is to heat up to 220°C at 5°C / min and then to 350°C at 1°C / min at the same air rate of 1L / min in a tube furnace, keep the temperature for sintering for 2 hours, and then cool down to room temperature. The material is ground and passed through a 60-mesh sieve to obtain a CTAB type amorphous iron oxide-silicon dioxide composite material. The comprehensive printing and dyeing wastewater of a printing and dyeing enterprise in Jiaxing, Zhejiang Province was treated with CTAB iron-silicon composite material. The main prop...

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

PropertyMeasurementUnit
adsorptionaaaaaaaaaa
clearance rateaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of water pollution treatment and relates to a preparation method of an efficient antimony removal adsorbent and an application of the efficient antimony removal adsorbent in printing and dyeing wastewater treatment, in particular to a preparation method of a porous stable amorphous water iron ore-silicon dioxide composite material and a method for treating antimony-containing printing and dyeing wastewater by utilizing the efficient adsorption characteristic of the composite material to antimony. According to the invention, a sol-gel-microemulsion method is used, a template agent is added to achieve self-assembling to synthesize the porous stable amorphous water iron ore-silicon dioxide composite material in one step. The shape change of the amorphous iron-silicon composite material is achieved by changing the types and the addition amount of the template agent, the iron-silicon ratio, the sintering conditions and the like. The prepared iron-silicon composite material is used for removing the antimony in the practical comprehensive printing and dyeing wastewater, the maximum adsorption capacity of the iron-silicon composite material canreach more than 40mg / g, and the stable discharge of the antimony (below 50mu g / L) can be achieved only by adding about 0.1kg per ton of the printing and dyeing wastewater.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and relates to a preparation method of an efficient antimony removal adsorbent and its application in printing and dyeing wastewater treatment. Specifically, it is a preparation method of a porous and stable amorphous ferrihydrite-silicon dioxide composite material and the use of its high-efficiency adsorption characteristics for antimony to treat antimony-containing printing and dyeing wastewater. Background technique [0002] As an important strategic metal, antimony and its compounds are widely used in the fields of ceramics, rubber, pigments, semiconductors and flame retardants, and thus cause serious pollution to the environment. Especially in the textile printing and dyeing industry, antimony is mainly used as a catalyst for polyester production and antimony-containing dyes or flame retardants. These antimony-containing substances will gradually migrate and release during...

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): B01J20/10B01J20/30C02F1/28C02F101/20C02F103/30
CPCB01J20/06B01J20/103B01J2220/4806B01J2220/4812C02F1/281C02F2101/20C02F2103/30
Inventor 杨昆仑徐新华刘媛利李毅洲楼子墨操珍周家盛
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com