Use and regeneration of an adsorbent to remove dyes from water
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-001/28
B01J-020/26
B01J-020/28
B01J-020/34
B01J-020/20
B01D-015/04
C02F-101/30
출원번호
16020354
(2018-06-27)
등록번호
10508046
(2019-12-17)
발명자
/ 주소
Al-Ahmed, Amir
Isloor, Arun M.
출원인 / 주소
King Fahd University of Petroleum and Minerals
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A method of removing at least one cationic dye from an aqueous solution. The method includes contacting the aqueous solution with an adsorbent comprising a water-insoluble membrane disposed on a substrate. The water-insoluble membrane comprises cross-linked humic acid, at least one alginate, and hyd
A method of removing at least one cationic dye from an aqueous solution. The method includes contacting the aqueous solution with an adsorbent comprising a water-insoluble membrane disposed on a substrate. The water-insoluble membrane comprises cross-linked humic acid, at least one alginate, and hydroxyethyl cellulose. The contacting forms a treated aqueous solution having a lower concentration of the at least one cationic dye relative to the aqueous solution.
대표청구항▼
1. A method of removing at least one cationic dye from an aqueous solution, comprising: pouring an aqueous mixture comprising humic acid, at least one alginate, and hydroxyethyl cellulose onto a substrate to form a film, drying the film and crosslinking the film with glutaraldehyde to form a first w
1. A method of removing at least one cationic dye from an aqueous solution, comprising: pouring an aqueous mixture comprising humic acid, at least one alginate, and hydroxyethyl cellulose onto a substrate to form a film, drying the film and crosslinking the film with glutaraldehyde to form a first water-insoluble membrane disposed on the substrate, thencontacting the aqueous solution with an adsorbent comprising the first water-insoluble membrane disposed on the substrate,wherein the first water-insoluble membrane consists essentially of glutaraldehyde-cross-linked humic acid, at least one alginate, and hydroxyethyl cellulose,wherein the weight ratio of humic acid:at least one alginate:hydroxyethyl cellulose lies in the range (10-20):(60-80):(10-20) respectively; andwherein the contacting forms a treated aqueous solution having a lower concentration of the at least one cationic dye relative to the aqueous solution and the contacting forms a dye-adsorbed water-insoluble membrane, thentreating the dye-adsorbed water-insoluble membrane with an HCl solution to remove the dye from the dye-adsorbed water-insoluble membrane and to regenerate the first water-insoluble membrane. 2. The method of claim 1, wherein the pH of the aqueous solution ranges from about 3 to about 10. 3. The method of claim 1, wherein the at least one cationic dye is selected from the group consisting of methylene blue, rhodamine B, crystal violet, basic fuchsin, safranin, pararosaniline, and a combination thereof. 4. The method of claim 1, wherein the adsorbent is disposed in a fixed bed reactor or fluidized bed reactor and the contacting involves passing the aqueous solution through the fixed bed reactor or fluidized bed reactor. 5. The method of claim 4, wherein the adsorbent is disposed in a fixed bed reactor that comprises a cartridge. 6. The method of claim 5, wherein the cartridge further comprises activated carbon. 7. The method of claim 1, wherein the adsorbent has a form selected from the group consisting of a granule, a pellet, a sphere, a powder, a woven fabric, a non-woven fabric, a mat, a felt, a block, and a honeycomb. 8. The method of claim 1, wherein the aqueous solution is contacted with the adsorbent at a temperature of about 10-90° C. and a pressure of about 1-50 bar.
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