Preparation method and application of modified orange peel biological adsorbent

A technology of biological adsorbent and orange peel is applied in the field of preparation of modified orange peel biological adsorbent, and can solve the problems of heavy metal-containing wastewater pollution and the like

Inactive Publication Date: 2012-10-17
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method and application of a modified orange peel biosorbent in order to solve the pollution control problem of heavy metal-containing wastewater. , reflux with epichlorohydrin in ethanol and NaOH solution to obtain epichlorohydrin crosslinked orange peel, then add catalyst, modifying agent is continuously stirred, after the reaction is completed, wash and dry to obtain cysteine or diethylenetriamine modified orange peel biosorbent

Method used

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  • Preparation method and application of modified orange peel biological adsorbent
  • Preparation method and application of modified orange peel biological adsorbent
  • Preparation method and application of modified orange peel biological adsorbent

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Embodiment 1

[0021] a. Collect orange peel waste from orange orchards or food factories, after cleaning, drying, grinding and sieving, add to the mixed solution of absolute ethanol and 2.5mol / L NaOH with a volume ratio of 1:1, and then add Epichlorohydrin is refluxed for 1-3 hours to obtain epichlorohydrin cross-linked orange peel;

[0022] b. The catalyst is sodium bicarbonate and modifier cysteine, and step a epichlorohydrin cross-linked orange peel is continuously stirred at a temperature of 50° C. for 4 hours;

[0023] c. After the reaction is completed, the reactants are washed and dried to obtain the cysteine-modified orange peel biosorbent.

[0024] The cysteine ​​modified orange peel biosorbent obtained by this method has a pH value of 2.0-6.0, heavy metal Cu 2+ The waste water is added to the reactor, and it is fully mixed at room temperature to carry out the adsorption reaction for 2 hours. After the reaction is completed, the solid-liquid separation is carried out. The solid ad...

Embodiment 2

[0026] a. Collect orange peel waste from orange orchards or food factories, after cleaning, drying, grinding and sieving, add to the mixed solution of absolute ethanol and 2.5mol / L NaOH with a volume ratio of 1:1, and then add Epichlorohydrin is carried out reflux reaction, time 1 hour, obtains epichlorohydrin cross-linked orange peel;

[0027] b. The catalyst is sodium bicarbonate and modifier cysteine, and step a epichlorohydrin cross-linked orange peel is continuously stirred at a temperature of 50° C. for 4 hours;

[0028] c. After the reaction is completed, the reactants are washed and dried to obtain the cysteine-modified orange peel biosorbent.

[0029] The cysteine ​​modified orange peel biosorbent obtained by this method has a pH value of 2.0-6.0, heavy metal Pb 2+ The waste water is added to the reactor, and it is fully mixed at room temperature to carry out the adsorption reaction for 2 minutes. After the reaction is completed, the solid-liquid is separated, and th...

Embodiment 3

[0031] a. Collect orange peel waste from orange orchards or food factories, after cleaning, drying, grinding and sieving, add to the mixed solution of absolute ethanol and 2.5mol / L NaOH with a volume ratio of 1:1, and then add The epichlorohydrin was refluxed for 3 hours to obtain the epichlorohydrin cross-linked orange peel;

[0032] b. The catalyst is sodium bicarbonate and the modifier diethylenetriamine and the epichlorohydrin cross-linked orange peel in step a are continuously stirred at a temperature of 50 ° C for 4 hours;

[0033] c. After the reaction is completed, the reactants are washed and dried to obtain the diethylenetriamine-modified orange peel biosorbent.

[0034] The diethylenetriamine modified orange peel biosorbent obtained by this method has a pH value of 2.0-6.0 heavy metal Ni 2+ The waste water is added to the reactor, and it is fully mixed at room temperature to carry out the adsorption reaction for 30 minutes. After the reaction is completed, the soli...

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Abstract

The invention relates to a preparation method and application of a modified orange peel biological adsorbent. The method comprises the steps that the orange peel waste material is cleaned, dried, ground, screened, and refluxed with epichlorohydrin in absolute ethyl alcohol and NaOH solution, so the epichlorohydrin cross-linking type orange peel is obtained; and the epichlorohydrin cross-linking type orange peel is added with a catalyst and a modifier to be continuously stirred, after the reaction is completed, and the treated orange peel is cleaned and dried, so the cysteine or diethylene triamine modified orange peel biological adsorbent can be obtained. The adsorbent can effectively adsorb the heavy metal ions of Cu<2+>, Pb<2+>, Ni<2+> and Zn<2+> in the wastewater, the treatment cost is low, the efficiency is high, and the treated water body can reach the national wastewater discharge standard, so the purpose of treatment of wastes with another waste is realized. Moreover, the heavy metal ions in the wastewater can also be recovered, and the adsorbent has the characteristics of low cost, reusability, simple preparation method and strong adsorption capability.

Description

technical field [0001] The invention relates to the reuse of agricultural waste, the preparation of biosorbents and the treatment of heavy metal wastewater, and belongs to the intersecting fields of environment and materials. In particular, it provides a preparation method of modified orange peel biosorbents and its application in water treatment. application. Background technique [0002] Heavy metal ions in the environment mainly come from industrial wastewater from mining, smelting, electrolysis, medicine, paint, alloy, electroplating, textile printing and dyeing, papermaking, ceramics and inorganic pigment manufacturing. Heavy metals discharged into the environment will enter organisms through food chains and other channels, and pose serious hazards to the ecological environment and human health. Therefore, how to effectively prevent and control heavy metal pollution has become an urgent problem to be solved. The development of economical, effective and safe heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 贾汉忠刘明灯李守柱袁群惠王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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