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Process for treating heavy metal wastewater

A technology for wastewater treatment and heavy metals, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems that the discharge water does not meet the national discharge standards and the time-consuming treatment of heavy metal wastewater, etc. Achieve the effects of short time consumption, enhanced adsorption, and good adsorption effect

Inactive Publication Date: 2019-04-09
长沙如洋环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heavy metal wastewater treatment process to solve technical problems such as long time-consuming treatment of heavy metal wastewater and discharge water that does not meet national discharge standards.

Method used

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  • Process for treating heavy metal wastewater
  • Process for treating heavy metal wastewater
  • Process for treating heavy metal wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A heavy metal wastewater treatment process, the specific steps are as follows:

[0030] (1) Preparation of treatment agent: After the corn stalk powder was treated with alkali and organically modified in sequence, it was added to chlorosulfonic acid together with sepiolite powder, and left to stand at 50°C for 2 hours, then cooled to room temperature (25°C). Filter, wash with water until neutral, heat to 1200°C, and sinter for 6 hours to obtain intermediate product I; add intermediate product I to polyvinyl alcohol aqueous solution, then add anionic polyacrylamide, stir at 80°C for 40 minutes, and centrifuge The intermediate product II was obtained; the intermediate product II was added to the iron ion solution, stirred at 500 rpm for 10 minutes, then concentrated ammonia water was added dropwise, and after the addition was completed, it was left to stand for 20 minutes, separated by magnetic separation, washed with water until neutral, Dry at 50°C to constant weight, p...

Embodiment 2

[0042] A heavy metal wastewater treatment process, the specific steps are as follows:

[0043] (1) Preparation of treatment agent: After the corn stalk powder was treated with alkali and organically modified in sequence, it was added to chlorosulfonic acid together with sepiolite powder, and stood at 60°C for 3 hours, then cooled to room temperature (25°C). Filter, wash with water until neutral, heat to 1300°C, and sinter for 8 hours to obtain intermediate product I; add intermediate product I to polyvinyl alcohol aqueous solution, then add anionic polyacrylamide, stir at 90°C for 60 minutes, and centrifuge The intermediate product II was obtained; the intermediate product II was added to the iron ion solution, stirred at 600 rpm for 15 minutes, then concentrated ammonia water was added dropwise, and after the addition was completed, it was left to stand for 25 minutes, separated by magnetic separation, washed with water until neutral, Dry at 60°C to constant weight, pour into...

Embodiment 3

[0055] A heavy metal wastewater treatment process, the specific steps are as follows:

[0056] (1) Preparation of treatment agent: After the corn stalk powder was treated with alkali and organically modified in sequence, it was added to chlorosulfonic acid together with sepiolite powder, left to stand at 50°C for 3 hours, cooled to room temperature (25°C), Filter, wash with water until neutral, heat to 1200°C, and sinter for 8 hours to obtain intermediate product I; add intermediate product I to polyvinyl alcohol aqueous solution, then add anionic polyacrylamide, stir at 80°C for 60 minutes, and centrifuge The intermediate product II was obtained; the intermediate product II was added to the iron ion solution, stirred at 500 rpm for 15 minutes, then concentrated ammonia water was added dropwise, and after the addition was completed, it was left to stand for 20 minutes, separated by magnetic separation, washed with water until neutral, Dry at 60°C to constant weight, pour into ...

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Abstract

The invention provides a process for treating heavy metal wastewater, which can realize heavy metal wastewater treatment in a relatively short time by preparing a magnetic treatment preparation. By adopting the process, after solid and liquid are separated, effluent can achieve the national drainage standard and can be directly drained, sludge is electrolyzed to realize heavy metal reclamation, the used treatment preparation can be separated by utilizing a magnetic separation method, and the treatment preparation can be recycled after regeneration (the heavy metal wastewater treatment effect is not remarkably reduced when the treatment preparation is used repeatedly for more than 1000 times). The process is applicable to heavy metal wastewater treatment, has short time consumption, enableseffluent to accord with the national drainage standard, can realize heavy metal reclamation, and accords with the concept of environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a heavy metal wastewater treatment process. Background technique [0002] With the rapid development of modern industry, the discharge of industrial wastewater has also increased sharply, the accumulation of heavy metals in water has intensified, and heavy metal pollution has become serious. On the other hand, enterprises that produce non-ferrous metals have wastewater discharges in the entire production process from mining, beneficiation, smelting to product processing, which contain heavy metal elements such as antimony, copper, lead, zinc, arsenic, and chromium. There are also industries such as electroplating, pigments, electronics, and instruments that will also cause serious heavy metal pollution. Heavy metal ions in heavy metal wastewater circulate through groundwater and migrate through soil, causing pollution to drinking water and food, and seriously en...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/52C02F1/56C02F11/00C02F101/20
CPCC02F1/281C02F1/285C02F1/286C02F1/5236C02F1/5263C02F1/56C02F11/006C02F2101/20
Inventor 不公告发明人
Owner 长沙如洋环保科技有限公司
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