Carboxylated graphene oxide: Characterization change and enhanced adsorption capacity towards Pb2+ and Cu2+ in wastewater

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2025-03-08 DOI:10.1016/j.molliq.2025.127312

Thi Tuong Van Tran, Mai Lien Tran, Chi Hieu Nguyen

{"title":"Carboxylated graphene oxide: Characterization change and enhanced adsorption capacity towards Pb2+ and Cu2+ in wastewater","authors":"Thi Tuong Van Tran, Mai Lien Tran, Chi Hieu Nguyen","doi":"10.1016/j.molliq.2025.127312","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>In this work, we conducted a carboxylation process on a pristine nanomaterial – graphene oxide (GO), to improve the number of its carboxyl functional groups and thereby its adsorption performance towards heavy metal ions in wastewater.</div></div><div><h3>Methods</h3><div>The carboxylated GO, denoted as GO-COOH, was prepared via a carboxylation procedure with chloroacetic acid as a precusor. Characterization analyses including FESEM, BET, XRD, FTIR and zeta potential, and batch adsorption experiments towards Pb<sup>2+</sup> and Cu<sup>2+</sup> ions in aqueous solution were carried out to evaluate characterization and adsorption ability of the prepared materials.</div></div><div><h3>Significant findings</h3><div>The adsorption capacity for Pb<sup>2+</sup> increased from q<sub>max</sub> = 279.70 mg/g (GO) to q<sub>max</sub> = 364.37 mg/g (GO-COOH0.5), meanwhile the q<sub>max</sub> values for Cu<sup>2+</sup> of GO and GO-COOH0.5 were 124.04 mg/g and 137.69 mg/g, respectively. The materials were also examined through a resuablity test and further used for a real wastewater from an industrial park in Ho Chi Minh City, Vietnam. It was found that the GO-COOH0.5 preserved relatively high adsorption capacity (67–69 %) after 5 cycles. Additionally, the GO-COOH0.5 exhibited higher removal efficiency for all metal ions present in the real wastewater as compared to GO, indicating potential applications of carboxylated GO adsorbent in practical wastewater treatment.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"426 ","pages":"Article 127312"},"PeriodicalIF":5.3000,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Liquids","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167732225004799","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Background

In this work, we conducted a carboxylation process on a pristine nanomaterial – graphene oxide (GO), to improve the number of its carboxyl functional groups and thereby its adsorption performance towards heavy metal ions in wastewater.

Methods

The carboxylated GO, denoted as GO-COOH, was prepared via a carboxylation procedure with chloroacetic acid as a precusor. Characterization analyses including FESEM, BET, XRD, FTIR and zeta potential, and batch adsorption experiments towards Pb²⁺ and Cu²⁺ ions in aqueous solution were carried out to evaluate characterization and adsorption ability of the prepared materials.

Significant findings

The adsorption capacity for Pb²⁺ increased from q_max = 279.70 mg/g (GO) to q_max = 364.37 mg/g (GO-COOH0.5), meanwhile the q_max values for Cu²⁺ of GO and GO-COOH0.5 were 124.04 mg/g and 137.69 mg/g, respectively. The materials were also examined through a resuablity test and further used for a real wastewater from an industrial park in Ho Chi Minh City, Vietnam. It was found that the GO-COOH0.5 preserved relatively high adsorption capacity (67–69 %) after 5 cycles. Additionally, the GO-COOH0.5 exhibited higher removal efficiency for all metal ions present in the real wastewater as compared to GO, indicating potential applications of carboxylated GO adsorbent in practical wastewater treatment.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.