Cd Removal from Aqueous Solutions Using a New Modified Zeolite Adsorbent
Water cadmium (Cd) pollution has widely aroused concerns due to high Cd toxicity in water bodies and its serious health risks to humans. Adsorption has been identified as an effective and widely utilized technology for water purification with heavy metal pollution. To develop a newly identified adso...
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| Veröffentlicht in: | Minerals (Basel) 2023-02, Vol.13 (2), p.197 |
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| creator | Zhang, He Gao, Shuo Cao, Xiaoxu Lin, Jitong Feng, Jingyi Wang, Hui Pan, Hong Yang, Quangang Lou, Yanhong Zhuge, Yuping |
| description | Water cadmium (Cd) pollution has widely aroused concerns due to high Cd toxicity in water bodies and its serious health risks to humans. Adsorption has been identified as an effective and widely utilized technology for water purification with heavy metal pollution. To develop a newly identified adsorbent of modified zeolite that can easily and effectively purify Cd-polluted water, NaOH modification (JZ), high-temperature modification (HZ), humic acid modification (FZ), Na2S modification (SZ), and ultrasonic modification (CZ) zeolites were developed, and their appearances and adsorption and desorption characteristics were investigated. The results showed that the adsorption capacity of Cd by JZ and SZ were improved by 68.87% and 32.06%, respectively, relative to that by natural zeolite (NZ); however, HZ, FZ, and CZ decreased the adsorption capacity. JZ had a higher adsorption capacity than SZ and could remove 99.90% Cd at an initial concentration of 100 mg/L. The dominant adsorption mechanism of Cd by JZ was the chemisorption of the monolayer. The preferred temperature and pH that enhanced Cd adsorption by JZ were 25–35 °C and 4–8, respectively. With an equilibrium adsorption capacity of 9.37–9.74 mg/g at an initial concentration of 280 mg/L, JZ reached its maximum saturated adsorption capacity; compared with SZ and NZ, the adsorption capacity increase was 27.83–68.81%. The R2 fitted by JZ’s Langmuir model and quasi-second-order dynamics model were both above 0.93. In summary, JZ was recognized as a novel absorbent for Cd-polluted water purification. |
| doi_str_mv | 10.3390/min13020197 |
| format | Article |
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Adsorption has been identified as an effective and widely utilized technology for water purification with heavy metal pollution. To develop a newly identified adsorbent of modified zeolite that can easily and effectively purify Cd-polluted water, NaOH modification (JZ), high-temperature modification (HZ), humic acid modification (FZ), Na2S modification (SZ), and ultrasonic modification (CZ) zeolites were developed, and their appearances and adsorption and desorption characteristics were investigated. The results showed that the adsorption capacity of Cd by JZ and SZ were improved by 68.87% and 32.06%, respectively, relative to that by natural zeolite (NZ); however, HZ, FZ, and CZ decreased the adsorption capacity. JZ had a higher adsorption capacity than SZ and could remove 99.90% Cd at an initial concentration of 100 mg/L. The dominant adsorption mechanism of Cd by JZ was the chemisorption of the monolayer. The preferred temperature and pH that enhanced Cd adsorption by JZ were 25–35 °C and 4–8, respectively. With an equilibrium adsorption capacity of 9.37–9.74 mg/g at an initial concentration of 280 mg/L, JZ reached its maximum saturated adsorption capacity; compared with SZ and NZ, the adsorption capacity increase was 27.83–68.81%. The R2 fitted by JZ’s Langmuir model and quasi-second-order dynamics model were both above 0.93. In summary, JZ was recognized as a novel absorbent for Cd-polluted water purification.</description><identifier>ISSN: 2075-163X</identifier><identifier>EISSN: 2075-163X</identifier><identifier>DOI: 10.3390/min13020197</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Adsorbents ; Adsorption ; Aqueous solutions ; Cadmium ; Capacity ; Chemisorption ; Composite materials ; Electron microscopes ; Fourier transforms ; Health risks ; Heavy metals ; High temperature ; Humic acids ; Pollution ; Scanning electron microscopy ; Sodium hydroxide ; Sodium sulfide ; Temperature preferences ; Toxicity ; Water pollution ; Water purification ; Zeolites</subject><ispartof>Minerals (Basel), 2023-02, Vol.13 (2), p.197</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-34a6fdd44e7ce2ac1e7cef2ada79e443bfcc32206165329d89dfea44167c2d0a3</citedby><cites>FETCH-LOGICAL-c337t-34a6fdd44e7ce2ac1e7cef2ada79e443bfcc32206165329d89dfea44167c2d0a3</cites><orcidid>0000-0002-5063-7347 ; 0000-0002-3839-475X ; 0000-0002-8298-196X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Zhang, He</creatorcontrib><creatorcontrib>Gao, Shuo</creatorcontrib><creatorcontrib>Cao, Xiaoxu</creatorcontrib><creatorcontrib>Lin, Jitong</creatorcontrib><creatorcontrib>Feng, Jingyi</creatorcontrib><creatorcontrib>Wang, Hui</creatorcontrib><creatorcontrib>Pan, Hong</creatorcontrib><creatorcontrib>Yang, Quangang</creatorcontrib><creatorcontrib>Lou, Yanhong</creatorcontrib><creatorcontrib>Zhuge, Yuping</creatorcontrib><title>Cd Removal from Aqueous Solutions Using a New Modified Zeolite Adsorbent</title><title>Minerals (Basel)</title><description>Water cadmium (Cd) pollution has widely aroused concerns due to high Cd toxicity in water bodies and its serious health risks to humans. Adsorption has been identified as an effective and widely utilized technology for water purification with heavy metal pollution. To develop a newly identified adsorbent of modified zeolite that can easily and effectively purify Cd-polluted water, NaOH modification (JZ), high-temperature modification (HZ), humic acid modification (FZ), Na2S modification (SZ), and ultrasonic modification (CZ) zeolites were developed, and their appearances and adsorption and desorption characteristics were investigated. The results showed that the adsorption capacity of Cd by JZ and SZ were improved by 68.87% and 32.06%, respectively, relative to that by natural zeolite (NZ); however, HZ, FZ, and CZ decreased the adsorption capacity. JZ had a higher adsorption capacity than SZ and could remove 99.90% Cd at an initial concentration of 100 mg/L. The dominant adsorption mechanism of Cd by JZ was the chemisorption of the monolayer. The preferred temperature and pH that enhanced Cd adsorption by JZ were 25–35 °C and 4–8, respectively. With an equilibrium adsorption capacity of 9.37–9.74 mg/g at an initial concentration of 280 mg/L, JZ reached its maximum saturated adsorption capacity; compared with SZ and NZ, the adsorption capacity increase was 27.83–68.81%. The R2 fitted by JZ’s Langmuir model and quasi-second-order dynamics model were both above 0.93. In summary, JZ was recognized as a novel absorbent for Cd-polluted water purification.</description><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Aqueous solutions</subject><subject>Cadmium</subject><subject>Capacity</subject><subject>Chemisorption</subject><subject>Composite materials</subject><subject>Electron microscopes</subject><subject>Fourier transforms</subject><subject>Health risks</subject><subject>Heavy metals</subject><subject>High temperature</subject><subject>Humic acids</subject><subject>Pollution</subject><subject>Scanning electron microscopy</subject><subject>Sodium hydroxide</subject><subject>Sodium sulfide</subject><subject>Temperature preferences</subject><subject>Toxicity</subject><subject>Water pollution</subject><subject>Water 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Removal from Aqueous Solutions Using a New Modified Zeolite Adsorbent</title><author>Zhang, He ; Gao, Shuo ; Cao, Xiaoxu ; Lin, Jitong ; Feng, Jingyi ; Wang, Hui ; Pan, Hong ; Yang, Quangang ; Lou, Yanhong ; Zhuge, Yuping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-34a6fdd44e7ce2ac1e7cef2ada79e443bfcc32206165329d89dfea44167c2d0a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Adsorbents</topic><topic>Adsorption</topic><topic>Aqueous solutions</topic><topic>Cadmium</topic><topic>Capacity</topic><topic>Chemisorption</topic><topic>Composite materials</topic><topic>Electron microscopes</topic><topic>Fourier transforms</topic><topic>Health risks</topic><topic>Heavy metals</topic><topic>High temperature</topic><topic>Humic acids</topic><topic>Pollution</topic><topic>Scanning electron microscopy</topic><topic>Sodium hydroxide</topic><topic>Sodium 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Yuping</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cd Removal from Aqueous Solutions Using a New Modified Zeolite Adsorbent</atitle><jtitle>Minerals (Basel)</jtitle><date>2023-02-01</date><risdate>2023</risdate><volume>13</volume><issue>2</issue><spage>197</spage><pages>197-</pages><issn>2075-163X</issn><eissn>2075-163X</eissn><abstract>Water cadmium (Cd) pollution has widely aroused concerns due to high Cd toxicity in water bodies and its serious health risks to humans. Adsorption has been identified as an effective and widely utilized technology for water purification with heavy metal pollution. To develop a newly identified adsorbent of modified zeolite that can easily and effectively purify Cd-polluted water, NaOH modification (JZ), high-temperature modification (HZ), humic acid modification (FZ), Na2S modification (SZ), and ultrasonic modification (CZ) zeolites were developed, and their appearances and adsorption and desorption characteristics were investigated. The results showed that the adsorption capacity of Cd by JZ and SZ were improved by 68.87% and 32.06%, respectively, relative to that by natural zeolite (NZ); however, HZ, FZ, and CZ decreased the adsorption capacity. JZ had a higher adsorption capacity than SZ and could remove 99.90% Cd at an initial concentration of 100 mg/L. The dominant adsorption mechanism of Cd by JZ was the chemisorption of the monolayer. The preferred temperature and pH that enhanced Cd adsorption by JZ were 25–35 °C and 4–8, respectively. With an equilibrium adsorption capacity of 9.37–9.74 mg/g at an initial concentration of 280 mg/L, JZ reached its maximum saturated adsorption capacity; compared with SZ and NZ, the adsorption capacity increase was 27.83–68.81%. The R2 fitted by JZ’s Langmuir model and quasi-second-order dynamics model were both above 0.93. In summary, JZ was recognized as a novel absorbent for Cd-polluted water purification.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/min13020197</doi><orcidid>https://orcid.org/0000-0002-5063-7347</orcidid><orcidid>https://orcid.org/0000-0002-3839-475X</orcidid><orcidid>https://orcid.org/0000-0002-8298-196X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Adsorbents Adsorption Aqueous solutions Cadmium Capacity Chemisorption Composite materials Electron microscopes Fourier transforms Health risks Heavy metals High temperature Humic acids Pollution Scanning electron microscopy Sodium hydroxide Sodium sulfide Temperature preferences Toxicity Water pollution Water purification Zeolites |
| title | Cd Removal from Aqueous Solutions Using a New Modified Zeolite Adsorbent |
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