Method for quickly removing heavy metal mercury ions in wastewater
A wastewater and ion technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of difficult to achieve satisfactory results, secondary pollution, complicated operation, etc., and achieve easy industrial amplification and high-dose adsorption. , the effect of simple operation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] The preparation of graphene microsphere adsorbent comprises the steps:
[0025] Ultrapure water was added to graphene oxide to prepare a graphene oxide solution with a mass concentration of 8 wt.%, and the solution was placed in an ultrasonic atomizer connected to a tube furnace with an ultrasonic frequency of 1.5 MHz. Make it atomized into aerosol droplets, and slowly pass through a tube furnace heated to 400°C under the drive of N2 and a filter vacuum pump, and collect it with a 0.22 um PTFE filter membrane at the end. Dry at room temperature for 8 hours to obtain the graphene microsphere adsorbent, and the particle size of the graphene microspheres prepared by the present invention is about 5 um.
Embodiment 2
[0027] The adsorption experiment of graphene microsphere adsorbent on mercury ions under different time, including the following steps
[0028] 10 mg of graphene microsphere adsorbent was accurately weighed with an electronic balance, and added to 20 mL of mercury ion solution with a concentration of 150 mg / L. Under the conditions of room temperature, 100 rpm and pH=5.0, adsorb for different times, and then centrifuge at 10000 rpm for 8 minutes,
[0029] And use the ultraviolet spectrophotometer to test the change of its absorbance before and after adsorption, and calculate the adsorption amount of the adsorbent at different times according to the following formula.
[0030] q(t)=(C0-Ct)V / m
[0031] In the formula, q(t) represents the adsorption amount (mg / g) at time t; C0 and Ct respectively represent the concentration of mercury ions in the initial solution (mg / L), and the concentration of mercury ions in the solution at time t (mg / L), and the mercury ion concentration (mg...
Embodiment 3
[0034] The test of adsorption isotherm comprises the following steps:
[0035] Accurately weigh 10 mg of graphene microsphere adsorbent with an electronic balance, and add it to 20 mL of mercury ion solution with a concentration range of 40-800 mg / L. Under the conditions of room temperature, 100 rpm and pH=5.0, adsorb for 120 min, and use a UV spectrophotometer to test the change of absorbance before and after adsorption, so as to calculate the concentration of mercury ions remaining in each solution, draw the adsorption isotherm, and test The maximum adsorption capacity of graphene microspheres, see figure 2 . It can be seen from the figure that the adsorption capacity of the adsorbent increases with the increase of the concentration of mercury ions in the solution until the adsorption reaches equilibrium. When the mercury ion concentration is low, the adsorption capacity of the adsorbent is less, which may be because at low concentration, the adsorption sites on the adsor...
PUM
| Property | Measurement | Unit |
|---|---|---|
| concentration | aaaaa | aaaaa |
| adsorption capacity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More