Preparation of pyromellitic dianhydride modified banana peel adsorbent
A technology of pyromellitic dianhydride and banana peel, applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of poor selection effect, poor adsorption effect of banana peel, etc. problems, to achieve good desorption performance, good physical and chemical stability, fast adsorption effect
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Embodiment 1
[0024] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 10-mesh sieve to obtain pretreated banana peel;
[0025] (2) Alkalized banana peel: In the reactor, add NaOH: 9g, water: 74mL, pre-treated banana peel: 18g, stir evenly, boil for 1.5 h, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;
[0026] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 93mL, pyromellitic dianhydride: 3g, after completely dissolving, then add Add alkalized banana peel: 9g, reflux at 70±3°C for 4 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.
Embodiment 2
[0028] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 20-mesh sieve to obtain pretreated banana peel;
[0029] (2) Alkalized banana peel: In the reactor, add NaOH: 7g, water: 79mL, pre-treated banana peel: 14g, stir evenly, boil for 2 hours, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;
[0030] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 85mL, pyromellitic dianhydride: 5g, after completely dissolving, then add Add alkalized banana peel: 15g, reflux at 70±3°C for 5 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.
Embodiment 3
[0032] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 10-mesh sieve to obtain pretreated banana peel;
[0033] (2) Alkalized banana peel: In the reactor, add NaOH: 10g, water: 70mL, pretreatment banana peel: 20g, stir evenly, boil for 1 h, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;
[0034] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 97mL, pyromellitic dianhydride: 2g, after completely dissolving, then add Add alkalized banana peel: 6g, reflux at 70±3°C for 6 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.
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