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
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[0028] Example 1:
[0029] A heavy metal wastewater treatment process, the specific steps are as follows:
[0030] (1) Preparation of treatment agent: Corn stalk powder is sequentially alkali-treated and organically modified, and then added to chlorosulfonic acid together with sepiolite powder, left standing at 50°C for 2 hours, and cooled to room temperature (25°C). Filter, wash with water to neutral, heat to 1200°C, sinter for 6 hours to obtain intermediate product I; add intermediate product I to the aqueous solution of polyvinyl alcohol, then add anionic polyacrylamide, stir at 80°C for 40 minutes, and centrifuge. The intermediate product II is obtained; the intermediate product II is added to the iron ion solution, stirred at 500 revolutions per minute for 10 minutes, and then concentrated ammonia water is added dropwise. After the dropwise addition, it is allowed to stand for 20 minutes, separated by magnetic separation method, and washed with water until neutral. Dry at 50°...
Example Embodiment
[0041] Example 2:
[0042] A heavy metal wastewater treatment process, the specific steps are as follows:
[0043] (1) Preparation of treatment agent: Corn stalk powder was sequentially alkali-treated and organically modified, and then added to chlorosulfonic acid together with sepiolite powder, left standing at 60°C for 3 hours, and cooled to room temperature (25°C). Filter, wash with water to neutral, heat to 1300°C, sinter for 8 hours to obtain intermediate product I; add intermediate product I to the aqueous solution of polyvinyl alcohol, then add anionic polyacrylamide, stir at 90°C for 60 minutes, and centrifuge. The intermediate product II is obtained; the intermediate product II is added to the iron ion solution, stirred at 600 rpm for 15 minutes, and then concentrated ammonia water is added dropwise. After the dropwise addition is completed, it is allowed to stand for 25 minutes, separated by magnetic separation, and washed with water until it is neutral. Dry at 60°C to c...
Example Embodiment
[0054] Example 3:
[0055] A heavy metal wastewater treatment process, the specific steps are as follows:
[0056] (1) Preparation of treatment agent: Corn stalk powder was sequentially alkali-treated and organically modified, then added to chlorosulfonic acid together with sepiolite powder, left standing at 50°C for 3 hours, and cooled to room temperature (25°C). Filter, wash with water to neutral, heat to 1200°C, sinter for 8 hours to obtain intermediate product I; add intermediate product I to the polyvinyl alcohol aqueous solution, then add anionic polyacrylamide, stir at 80°C for 60 minutes, and centrifuge. Intermediate product II is obtained; the intermediate product II is added to the iron ion solution, stirred at 500 rpm for 15 minutes, and then concentrated ammonia water is added dropwise. After the addition is completed, it is allowed to stand for 20 minutes, separated by magnetic separation, and washed with water until it is neutral. Dry at 60°C to constant weight, pour...
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