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Hybrid sorbent

A technology of adsorbent and substrate, which is applied in the field of water purification devices and can solve the problems of low adsorption capacity of arsenic compounds

Inactive Publication Date: 2020-03-24
ZAKRYTOE AKTSIONERNOE OBSHCHESTVO AKVAFOR PRODAKSHN ZAO AKVAFOR PRODAKSHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The closest analog has the disadvantage of low adsorption capacity for arsenic compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Substrate - macroporous fibrous material - anion exchange on a substrate of PAN-fibres with an anion exchange group content of 8.6 mml / g.

[0061] The ferrihydrite content in the hybrid adsorbent is 98%.

[0062] The particle size of HFO, especially ferrihydrite is -80-140nm.

[0063] Iron(III) content in hybrid sorbent - 63 mg iron to 1 g sorbent.

[0064] Adsorption capacity for As(V) - 32 mg / g (at pH 7).

[0065] Adsorption capacity for As(III) - 30 mg / g (at pH 7).

[0066] Adsorption kinetics of As(V)—half-adsorption time is less than 1 minute.

[0067] Removal kinetics of As(III) - half adsorption time 1 min.

[0068] Adsorption capacity for Cr(VI) - 250 mg / g (at pH 7).

[0069] Cu adsorption capacity - 240mg / g.

[0070] Adsorption capacity of Pb - 360mg / g.

[0071] exist figure 1 An electron micrograph of the initial anion-exchange polymer fibers used to produce the hybrid adsorbent in Example 1 is given in (1a). In the second electron micrograph (1b) a h...

Embodiment 2

[0073] Substrate—macroporous granular material—anion exchange resin.

[0074] The ferrihydrite content in the hybrid sorbent was 92%.

[0075] The particle size of HFO, especially ferrihydrite is -50-120nm.

[0076] Anion exchange group content in the mixture - 9 mmol / g.

[0077] Iron(III) content in the hybrid sorbent - 72 mg / g.

[0078] Adsorption capacity for As(V) - 44 mg / g (at pH 7).

[0079] Adsorption capacity for As(III) - 34 mg / g (at pH 7).

[0080] As(V) removal kinetics—adsorption half time 25 minutes.

[0081] As(III) removal kinetics - half adsorption time 30 minutes.

[0082] Adsorption capacity for Cr(VI) - 300 mg / g (at pH 7).

[0083] Cu adsorption capacity - 270mg / g.

[0084] Adsorption capacity of Pb - 180mg / g.

Embodiment 3

[0086] Substrate—a 1:8 mixture of macroporous fibers and granular materials, respectively.

[0087] The ferrihydrite content in the hybrid adsorbent was 93%.

[0088] Particle size of HFO, especially ferrihydrite - 50-140nm.

[0089] Anion exchange group content in the hybrid adsorbent - 8.95 mmol / g.

[0090] Iron(III) content in the hybrid sorbent - 71 mg / g.

[0091] Adsorption capacity for As(V) - 42 mg / g (at pH 7).

[0092] Adsorption capacity for As(III) - 36 mg / g (at pH 7).

[0093] As(V) removal kinetics - half adsorption time 1.5 minutes.

[0094] As(III) removal kinetics - half adsorption time 4 minutes.

[0095] Adsorption capacity for Cr(VI) - 295 mg / g (at pH 7).

[0096] Cu adsorption capacity - 265mg / g.

[0097] Adsorption capacity of Pb - 200mg / g.

[0098] The HFO types in the hybrid adsorbent phases described in Examples 1-3 were determined by Mossbauer spectroscopy and in figure 2 given in. exist figure 2 The Mossbauer spectrum of the hybrid adsorbe...

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Abstract

A hybrid sorbent based on an anion-exchange polymer matrix with HFO, for the selective sorption of arsenic, wherein the HFO is present in the matrix in the form of particles, the majority of which areamorphous ferrihydrite and the proportion thereof is no less than 80% and preferably more than 90% of the total mass of HFO. The aim of the invention and the technical result achieved through the useof the invention is to develop a new hybrid sorbent comprising HFO, with increased kinetic sorption of both As(III) and As(V) forms of arsenic simultaneously.

Description

technical field [0001] The present invention comes from the field of hybrid (hybrid, hybrid, hybrid) sorbents for the removal of arsenic compounds from water and is intended for use in water purification devices. Background technique [0002] In many countries, due to lack of surface water sources, they use groundwater instead. [0003] When groundwater is used as a water source, there is the problem of arsenic contamination, which is typical in 20 countries, such as the United States and Chile. In the Russian regions there are several regions where the groundwater contains arsenic, such as the Transbaical, Stavropol, Perm, Khabarovsk, Tuva Republic, Magadan and Pensa regions and also the Dagestan Republic. Arsenic contained in water leads to the development of cancer and causes dermatophytids. In water, arsenic includes arsenic compounds (also known as As(III)) such as arsenite and arsenous acid, and arsenic compounds (also known as As(V)) such as arsenate. Adsorbents fo...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/26B01J20/32
CPCB01J20/06B01J20/28004B01J41/14B01J47/014B01J47/127B01J20/3212B01J20/3236B01J20/3293B01J20/3295C02F1/42C02F2001/422C02F2101/103C02F1/288C02F1/281C02F1/285B01J20/0229B01J20/26B01J20/28007B01J20/28026B01J20/2808B01J41/04
Inventor 叶夫根尼娅·谢尔盖耶芙娜·瓦西里·叶娃亚历山德罗·根纳德维奇·米蒂利内奥斯尤里·叶夫根尼耶维奇·卡扎克维奇尤利尔·阿纳托列芙娜·列米佐娃
Owner ZAKRYTOE AKTSIONERNOE OBSHCHESTVO AKVAFOR PRODAKSHN ZAO AKVAFOR PRODAKSHN
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