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Treatment method for water body contaminated by heavy metals

A technology for heavy metals and water bodies, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of heavy metal pollution and utilization rate of caragana, and achieve the problem of resource utilization, good Adsorption effect

Inactive Publication Date: 2018-04-13
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is: the present invention proposes a kind of using caragana as raw material, prepares novel adsorbent, utilizes this novel adsorbent as the adsorbent material of heavy metal polluted water body, solves the heavy metal pollution and caragana in lakes, rivers and other water bodies. The problem of low utilization rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Harvest and dry the caragana;

[0024] (2) pulverize the caragana bar after drying, and cross a 60-mesh sieve;

[0025] (3) Wash and dry the sieved caragana and put it into a tube furnace, feed nitrogen gas at a flow rate of 250ml / min, the heating rate is 10°C / min, and the constant temperature time is set at 500°C for 3h , then cooled to room temperature to obtain Caragana charcoal;

[0026] (4) Immerse Caragana charcoal in a hydrogen peroxide solution with a mass concentration of 1%, stir and soak for 2 hours at a temperature of 50° C., then filter and wash until neutral;

[0027] (5) Immerse the washed caragana charcoal in hydrochloric acid with a concentration of 1mol / L, soak for 2 hours at a temperature of 50°C, then filter and wash until neutral;

[0028] (6) Immerse Caragana charcoal in an aluminum sulfate solution with a mass concentration of 10%, and stir for 30 minutes at 30°C;

[0029] (7) filter and dry the caragana charcoal of step (6);

[0030] (8) ...

Embodiment 2

[0038] (1) Harvest and dry the caragana;

[0039] (2) Pulverize the caragana bar after airing, cross 80 mesh sieves;

[0040] (3) Wash and dry the sieved caragana, put it into a tube furnace, feed nitrogen gas at a flow rate of 250ml / min, the heating rate is 15°C / min, and the constant temperature time is set at 600°C for 2h , then cooled to room temperature to obtain Caragana charcoal;

[0041] (4) Immerse Caragana charcoal in a hydrogen peroxide solution with a mass concentration of 2%, stir and soak for 2 hours at a temperature of 60°C, then filter and wash until neutral;

[0042] (5) Immerse the washed Caragana charcoal in hydrochloric acid with a concentration of 1mol / L, soak for 3 hours at a temperature of 60°C, then filter and wash until neutral;

[0043] (6) Immerse Caragana charcoal in an aluminum sulfate solution with a mass concentration of 20%, and stir for 30 minutes at 50°C;

[0044] (7) filter and dry the caragana charcoal of step (6);

[0045] (8) Anaerobic ...

Embodiment 3

[0053] (1) Harvest and dry the caragana;

[0054] (2) Pulverize the caragana bar after airing, cross 80 mesh sieves;

[0055] (3) Wash and dry the sieved caragana, put it into a tube furnace, feed nitrogen gas at a flow rate of 250ml / min, the heating rate is 20°C / min, and the constant temperature time is set at 650°C for 2h , then cooled to room temperature to obtain Caragana charcoal;

[0056] (4) Immerse Caragana charcoal in a hydrogen peroxide solution with a mass concentration of 3%, stir and soak for 2 hours at a temperature of 70°C, then filter and wash until neutral;

[0057] (5) Immerse the washed Caragana charcoal in hydrochloric acid with a concentration of 1mol / L, soak for 2 hours at a temperature of 70°C, then filter and wash until neutral;

[0058] (6) Immerse Caragana charcoal in an aluminum sulfate solution with a mass concentration of 30%, and stir for 30 minutes at 60°C;

[0059] (7) filter and dry the caragana charcoal of step (6);

[0060] (8) Anaerobic ...

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Abstract

The invention provides a treatment method for a water body contaminated by heavy metals. The treatment method comprises the following steps: harvesting Caragana korshinskii and then successively carrying out airing, crushing and sieving; putting the Caragana korshinskii into a tubular furnace for treatment for 2 to 3 h so as to obtain Caragana korshinskii carbon; soaking the Caragana korshinskii carbon in a hydrogen peroxide solution with a mass concentration of 1 to 3%, hydrochloric acid with a concentration of 1 mol / L and an aluminum sulfate solution with a mass concentration of 10 to 40% and then subjecting the Caragana korshinskii carbon to filtering and drying; carrying out anoxic cracking at 500 to 700 DEG C for 30 to 60 min; washing the Caragana korshinskii carbon having undergone cracking to washing with ethanol and distilled water; carrying out drying and sieving so as to obtain modified Caragana korshinskii carbon; taking bottom sludge in the water body contaminated by heavymetals and successively carrying out dehydration, drying, crushing and sieving with a 60-to-80-mesh sieve; mixing the sieved bottom sludge with the modified Caragana korshinskii carbon according to avolume ratio of 1: 3 so as to obtain a novel adsorbent; uniformly scattering the novel adsorbent into the water body contaminated by heavy metals; and excavating bottom sludge in the water body in a dry season, wherein a part of the bottom sludge is left for preparation of the novel adsorbent, and the major part of the bottom sludge is transported to a landfill for burying.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for heavy metal polluted water bodies. Background technique [0002] Heavy metal wastewater comes from metallurgy, electroplating, mining, chemical and other departments, such as mine drainage, leaching water from waste rock yards, tailings drainage from ore dressing plants, drainage from non-ferrous metal smelters, pickling water from non-ferrous metal processing plants, and washing water from plating parts in electroplating plants , Pickling drainage of iron and steel plants, and industrial wastewater such as electrolysis, pesticides, medicines, paints, and pigments. The types, contents and forms of heavy metal ions in wastewater vary greatly with different production types. With the increasing production activities such as mining, smelting, and processing of heavy metals, the heavy metal wastewater produced has greatly increased both in quantity an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J2220/4825C02F1/283C02F2101/20
Inventor 万玉山丁紫薇万子洋
Owner CHANGZHOU UNIV
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