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Method for adsorbing lead in wastewater by using composite magnetic biological adsorbent

A biosorbent and composite technology, applied in biological water/sewage treatment, adsorption water/sewage treatment, chemical instruments and methods, etc., can solve the problems of reduced treatment efficiency, high cytotoxicity, loss, etc.

Inactive Publication Date: 2012-08-01
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional biosorption process, biological cells are generally in a free state, and are easily lost from the reactor and discharged with the liquid to be treated. It is difficult to recover and reuse by solid-liquid separation
In addition, the wastewater to be treated is often highly toxic to cells, and the activity of biological cells in a free state is difficult to maintain, resulting in a gradual decline in treatment efficiency.

Method used

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  • Method for adsorbing lead in wastewater by using composite magnetic biological adsorbent
  • Method for adsorbing lead in wastewater by using composite magnetic biological adsorbent
  • Method for adsorbing lead in wastewater by using composite magnetic biological adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for utilizing a composite magnetic biosorbent to adsorb lead in waste water, comprising the following steps:

[0039] Take 1L of lead-containing industrial wastewater. The Pb(II) content of the wastewater is about 300mg / L. Heavy) The compound magnetic biosorbent of the present invention, under the condition of temperature of 35°C (30°C to 35°C is acceptable) and rotation speed of 150 rpm, oscillating and adsorbing for 8h, and then directly filtering to separate the water and the adsorbed compound Magnetic biosorbent, the lead-containing industrial wastewater filtered out after separation is adjusted to be neutral and then discharged to complete the treatment of lead-containing industrial wastewater.

[0040] The unadsorbed lead was determined by flame atomic absorption spectrophotometry, and the lead removal rate reached 89.24% (see the comparison of lead removal effects in Table 4 below). The used biosorbent can be recycled through analysis. The specific opera...

Embodiment 2

[0049]The composite magnetic biosorbent prepared in Example 1 was added to lead-containing industrial wastewater (Pb(II) concentration 10-500 mg / L) at different concentrations at 60 g / L (wet weight), the lead-containing industrial wastewater The pH value of each was adjusted to 5, and the adsorption was oscillating at 35°C and 150 rpm. After being adsorbed for 8 hours, it was directly filtered to separate the composite magnetic biosorbent from the lead-containing industrial wastewater. The filtered lead-containing industrial wastewater Emissions after adjusting to neutral.

[0050] The unadsorbed lead ions in the solution were measured by flame atomic absorption spectrophotometer, and the adsorption effect of the composite magnetic biosorbent on lead in wastewater containing lead with different concentrations image 3 shown. Depend on image 3 Visible, the method of the present invention reaches 90.18% to the removal efficiency of the lead-containing waste water of 10 mg / L, ...

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Abstract

The invention discloses a method for adsorbing lead in wastewater by using a composite magnetic biological adsorbent. The method comprises the following steps of: adding 15-60 g / L of the composite magnetic biological adsorbent by wet weight into lead-contained industrial waste water with a pH value ranging from 2 to 6.5 and a concentration being 10-500 mg / L; oscillating and adsorbing the mixture at a temperature of 30-35 DEG C for more than 8 hours; then separating the adsorbent from the wastewater; and adjusting the wastewater to be neutral to discharge. The composite magnetic biological adsorbent uses white-rot fungus living mycelium as a carrier; the mycelium is wound into a pellet; Fe3O4 nanometer particles and calcium alginate are embedded inside the pellet; and the calcium alginate serving as an immobilization medium is used for tightly connecting the mycelium with the Fe3O4 nanometer particles. The method provided by the invention has the advantages of large adsorption amount, high adsorption efficiency, simpleness and convenience for operation, low cost, high recycle rate, cleanliness, no pollution and the like.

Description

technical field [0001] The invention belongs to the field of biological adsorption treatment of wastewater, in particular to a method for a composite biological adsorbent to adsorb heavy metals in wastewater. Background technique [0002] With the acceleration of urbanization and the rapid development of industry and agriculture, most cities in my country have serious water pollution problems. A large amount of untreated urban garbage, industrial waste water, domestic sewage and atmospheric sediments are continuously discharged into the water body, causing the heavy metal content in the suspended matter and sediment of the water body to rise sharply. Water heavy metal pollution has become a global environmental pollution problem. The treatment of heavy metal polluted water bodies is imminent. [0003] Lead-containing wastewater comes from various battery workshops, mineral processing plants, petrochemical plants, etc. During the production and operation of these industrial ...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F9/14C02F1/66C02F1/28C02F3/34
Inventor 黄丹莲曾茁桐曾光明许飘赖萃赵美花危臻黄超李宁杰李芳玲张辰
Owner HUNAN UNIV
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