A kind of cr(vi) adsorbent with excellent recycling performance and preparation method thereof

An adsorbent, an excellent technology, applied in the field of Cr adsorbent and its preparation, can solve the problems of non-recyclable, chemical structure damage of the adsorbent, etc., and achieve the effects of fast adsorption rate, enhanced oxidation resistance, and excellent recycling performance

Inactive Publication Date: 2020-08-25
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hexavalent chromium (Cr(VI)) is a strong oxidant, and the amine group is a reducing functional group. They are prone to redox reactions, which destroy the chemical structure of the adsorbent and cannot be recycled.

Method used

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  • A kind of cr(vi) adsorbent with excellent recycling performance and preparation method thereof
  • A kind of cr(vi) adsorbent with excellent recycling performance and preparation method thereof
  • A kind of cr(vi) adsorbent with excellent recycling performance and preparation method thereof

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Embodiments of the present invention provide a Cr(VI) adsorbent with excellent recycling performance, which is made of the following raw materials: corn stalk skin, polyvinyl alcohol, epichlorohydrin, azobisisobutyronitrile, N, N -Dimethylformamide, Sodium Hydroxide, 2-Bromoisobutyryl Bromide, Dichloromethane, Pyridine, Methanol, Dimethylaminoethyl Methacrylate, Cuprous Bromide, Copper Bromide, N,N,N ',N",N"-pentamethyldiethylenetriamine, acetone and deionized water.

[0031] Please refer to figure 1 , a preparation method of Cr(VI) adsorbent with excellent recycling performance, comprising the following steps:

[0032] S1. Pretreating the corn stalk skin to obtain corn stalk fiber; specifically, cutting the corn stalk into 5 cm long sections, p...

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Abstract

The invention discloses a Cr(VI) adsorbent with excellent cyclic utilization performance. The Cr(VI) adsorbent is prepared from the following raw materials: corn stalk epidermis, polyvinyl alcohol, epichlorohydrin, azodiisobutyronitrile, N, N-dimethylformamide, sodium hydroxide, 2-bromoisobutyryl bromide, dichloromethane, pyridine, methanol, dimethylaminoethyl methacrylate, cuprous bromide, copperbromide, N, N, N', N'', N''-pentamethyldiethylenetriamine, acetone and deionized water. The invention also discloses a preparation method of the Cr(VI) adsorbent with excellent cyclic utilization performance. The Cr(VI) adsorbent provided by the invention has increased adsorption capacity, is not oxidized at the adsorption stage, and can be recycled.

Description

technical field [0001] The invention relates to a Cr(VI) adsorbent, in particular to a Cr(VI) adsorbent with excellent recycling performance and a preparation method thereof. Background technique [0002] Hexavalent chromium (Cr(VI)) is a strong oxidizing agent. It is widely found in industrial wastewater, such as: electroplating, textile, leather tanning, metal surface treatment, wood preservation, nuclear power plants and chromate preparation industries. The key to treating chromium wastewater by adsorption method is to prepare efficient and cheap adsorbent. [0003] Corn stalks have large yields and abundant resources, and the main component of corn stalks is cellulose. Cellulose itself cannot adsorb Cr(VI), so chemical modification is required to endow it with adsorption sites, and corn stalk fibers serve as the skeleton for carrying adsorption sites. , so that the adsorbent is shaped and easy to apply, and the separation between the adsorbent and the wastewater can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/265B01J20/28023C02F1/286C02F1/288C02F2101/22
Inventor 文学严春杰周森孙娜
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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