Method for removing divalent cadmium in wastewater by utilization of microcystis aeruginosa gel beads

A technology of Microcystis aeruginosa gel and Microcystis aeruginosa gel, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the toxicity response mechanism of heavy metals and unclear removal characteristics, etc. problem, to achieve the effect of low processing cost, wide source of raw materials and low price

Inactive Publication Date: 2014-05-07
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the unclear response mechanism and removal characteristics of algae to heavy metal toxicity, there is no precedent for the application of Microcystis aeruginosa gel pellets in the treatment of cadmium-containing wastewater.

Method used

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  • Method for removing divalent cadmium in wastewater by utilization of microcystis aeruginosa gel beads
  • Method for removing divalent cadmium in wastewater by utilization of microcystis aeruginosa gel beads
  • Method for removing divalent cadmium in wastewater by utilization of microcystis aeruginosa gel beads

Examples

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Effect test

Embodiment 1

[0020] A method of utilizing Microcystis aeruginosa gel beads to remove divalent cadmium in waste water according to the present invention comprises the following steps:

[0021] 1. Preparation of Microcystis aeruginosa Gel Pellets

[0022] Microcystis aeruginosa was inoculated into an Erlenmeyer flask filled with 500 mL of BG11 medium, and placed in a constant temperature light incubator with a temperature of 25 ° C and a light intensity of 2000 lux for 15 days. Place the cultured Microcystis aeruginosa liquid on a clean bench for surface sterilization for 30 minutes, then divide it into several centrifuge tubes, and centrifuge for 15 minutes on a centrifuge with a rotation speed of 2500 rpm. After centrifugation, remove 450 mL of supernatant, and the remaining high-concentration Pour the liquid into a beaker, then add the sodium alginate solution with a concentration of 40g / L that was cooled to room temperature after high temperature sterilization, and stir evenly with a gla...

Embodiment 2

[0030] A method of utilizing Microcystis aeruginosa gel pellets to remove divalent cadmium in waste water according to the present invention comprises the following steps:

[0031] 1. Preparation of Microcystis aeruginosa Gel Pellets

[0032] This step is the same as Step 1 of Example 1.

[0033] 2. Treat divalent cadmium wastewater

[0034] The Microcystis aeruginosa gel beads prepared by the above method are added to divalent cadmium wastewater with an initial pH value of 6, and the initial concentration of divalent cadmium ions is 60, 100, 200mg / L respectively, and the The amount of addition is 20g based on the wet weight of Microcystis aeruginosa gel pellets. The reactor is placed in a shaking box with a rotation speed of 150rpm, and the temperature is kept at 25°C. After shaking for 3 hours, the pellets are separated from the solution to complete the reaction. Treatment of divalent cadmium wastewater. The concentration of remaining divalent cadmium ions in the solution...

Embodiment 3

[0039] A method of utilizing Microcystis aeruginosa gel pellets to remove divalent cadmium in waste water according to the present invention comprises the following steps:

[0040] 1. Preparation of Microcystis aeruginosa Gel Pellets

[0041] This step is the same as Step 1 of Example 1.

[0042] 2. Treat divalent cadmium wastewater

[0043] The Microcystis aeruginosa gel pellets prepared above are added to the divalent cadmium wastewater with an initial pH value of 6 and an initial concentration of 100mg / L, and the amount of addition in every liter of wastewater is expressed as Microcystis aeruginosa gel pellets The wet weight is 20g, the reactor is placed in a shaking box with a rotation speed of 150rpm, and the temperature is kept at 25°C. Samples are taken at 10, 20, 30, 60, 120, 180, 360, 540, and 720 minutes after the start of shaking. The concentration of remaining divalent cadmium ions in the solution was measured by flame atomic absorption spectrophotometry, and the...

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Abstract

The invention discloses a method for removing divalent cadmium in wastewater by the utilization of microcystis aeruginosa gel beads. The method provided by the invention comprises the following steps: taking a certain amount of divalent cadmium wastewater and adjusting pH value to 2.0-10.0, adding a certain amount of microcystis aeruginosa gel beads into wastewater with the addition amount of the microcystis aeruginosa gel beads in a liter of wastewater being 10-100g (by wet weight), reacting in a thermostatic oscillator at the rotating speed of 50rpm-300rpm for 0-24h, controlling the reaction temperature to 10-50 DEG C, and separating the small microcystis aeruginosa gel beads from a solution after the reaction so as to remove divalent cadmium in wastewater. The method provided by the invention has advantages of low cost, convenient operation, high processing efficiency and the like. The method provided by the invention can be applied in processing wastewater from an electroplate factory, a smelting plant, an electronics factory and the like.

Description

technical field [0001] The invention relates to the application of algae composite materials in the field of waste water treatment, in particular to the application of microcystis aeruginosa gel balls in the treatment of heavy metal waste water. Background technique [0002] Heavy metal pollution in water is a serious environmental pollution problem. After the "bone pain disease" incident caused by cadmium broke out in Japan in the 1950s, such incidents occurred frequently and attracted the common attention of all countries in the world. Electroplating, metallurgy, mining, ceramics and other industries discharge a large amount of cadmium-containing wastewater every year. Cadmium in the environment cannot be biodegraded. The biological half-life of cadmium in the organism is as long as 10-30 years. It is the most known poison that accumulates in the body. Although cadmium can promote growth, improve growth performance and reproductive performance, and promote certain enzyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/62
Inventor 王慧刘云国刘韵琴曾光明胡新将李婷婷李华英
Owner HUNAN UNIV
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