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

Method for removing heavy metallic salt in industrial wastewater by utilizing shells

A technology for industrial wastewater and heavy metal salts, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of poor resistance to the impact of running water and easy loss, unsolved metal recovery methods, and difficult desorption of adsorbed metals. , to achieve the effect of short adsorption time, good natural sedimentation performance and good effect

Inactive Publication Date: 2009-09-23
GUANGXI UNIV
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the defects of the selected materials are very prominent: the source is unique, not easy to obtain, resulting in high cost of use, or easy to generate too much sludge, or poor impact resistance of running water and easy to lose, or adsorbed metals are not easy to desorb , or unsolved metal recovery methods, or require complex pre-treatment, or cannot be recycled

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
  • Method for removing heavy metallic salt in industrial wastewater by utilizing shells
  • Method for removing heavy metallic salt in industrial wastewater by utilizing shells
  • Method for removing heavy metallic salt in industrial wastewater by utilizing shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: shell preparation consumption is to Cu 2+ Remove the effect of the effect

[0030] Generally, the experimental steps are as follows:

[0031] (1) 100mL initial Cu 2+ Cu with a concentration of 100mg / L 2+ The heavy metal salt solution (initial pH 5) was placed in a 250mL Erlenmeyer flask, and a certain amount of shell preparation (see figure 1 ), at 32°C for 2 hours on a 200rpm shaker.

[0032] (2) Remove the adsorbed solution from the Erlenmeyer flask, pour it into a centrifuge tube, centrifuge at 4800 rpm for 5 minutes (Beckman centrifuge, Germany), and take the supernatant.

[0033] (3) adopt the standard method of Perkin-Elmer Company to measure residual Cu with atomic absorption instrument (Beijing General Analysis General, TAS-990) 2+ concentration.

[0034] (4) With the "National Standard Sewage Comprehensive Discharge Standard of the People's Republic of China" (GB8978-1996) (see Table 1 below) as a reference standard, it is judged that the di...

Embodiment 2

[0039] Example 2: Solution initial Cu 2+ Concentration vs. Cu 2+ Remove the effect of the effect

[0040] see figure 2 , in the detection solution the initial Cu 2+ Concentration on the removal of Cu by shell preparation 2+ In the experiment of the influence of effect, the consumption of natural shell preparation (◆) and pretreatment shell preparation (■) is 1g / 100ml, and the solution initial Cu 2+ The concentration was gradually increased, the initial pH of the solution was 5, and the solution was adsorbed on a shaking table for 2 hours at 32°C. Other experimental conditions were the same as those in Example 1. With the initial Cu 2+ When the concentration increases from 100mg / L to 400mg / L, the removal effect of natural shells can reach the national secondary emission standard for copper. When the initial Cu 2+ Concentration increased more than 400mg / L, the removal effect of natural shell preparations decreased significantly, and the residual Cu in the solution 2+ Th...

Embodiment 3

[0041] Example 3: Adsorption time on Cu 2+ Remove the effect of the effect

[0042] see image 3 , removal of Cu from shell preparations at detection of adsorption time 2+ In the experiment of the influence of the effect, the dosage of the natural shell preparation (◆) and the pretreatment shell preparation (■) are both 1g / 100ml, the initial pH of the solution is 5, and the initial Cu in the solution 2+ The concentration is 100mg / L, 32°C shaker adsorption, the adsorption time is from 15 minutes to 150 minutes, and the residual Cu in the solution is detected every 15 minutes 2+ Concentration, other experimental conditions are all identical with the experimental conditions of embodiment 1.

[0043]With the extension of adsorption time, the removal effect increased significantly. After the pretreatment shell preparation is adsorbed for 75 minutes, the removal effect can reach the national secondary emission standard for copper. However, no matter pretreatment or natural shel...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for removing heavy metallic salt ions in industrial wastewater by utilizing shells. The method adopts shell granular preparation with diameter of 2+ / -0.3 mm, and preferably uses 1MH2SO4 for pretreatment in advance. The shell preparation has the best effect of adsorbing and removing Cu<2+> and Fe<3+>, and has a certain effect of adsorbing and removing Zn<2+> and Cd<2+> in mixed ion solution with Cu<2+>, Zn<2+>, Fe<3+> and Cd<2+> in industrial wastewater. The adsorption effect of the method to Fe<3+> can reach more than 99 percent, and the removing effect of the method to Cu<2+> and Zn<2+> can reach second-grade discharge standards for copper and zinc in China.

Description

technical field [0001] The invention relates to a method for removing heavy metal salts in industrial wastewater, in particular to a method for removing heavy metal salts in industrial wastewater by using shells. Background technique [0002] Heavy metals are elements that make up the earth's crust, mostly exist in various minerals, and their content is generally less than 0.1% (Cong Yanguo and Wei Lihua, 2002), which belong to trace elements. Some heavy metals can participate in some special growth and metabolism activities of organisms at a certain (trace) level or in a certain ion valence state (Chen Suhua et al., 2002). In this case these heavy metal ions are indispensable for the growth and metabolism of organisms. From the perspective of bioavailability, heavy metals cannot be degraded and completely disappear from the environment (An et al., 2001). They can only be transformed from one form to another, from high concentration to low concentration, and some of them ca...

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 Applications(China)
IPC IPC(8): C02F1/28C02F1/62C02F101/20
Inventor 李有志唐纪良马庆生刘杨
Owner GUANGXI 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