Black liquor derived lignin adsorbents for removal of organic pollutants from water

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2025-02-01 DOI:10.1016/j.reactfunctpolym.2025.106185

Hande Barkan Öztürk , Philip Verdross , Alexander Bismarck

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Abstract

We present the preparation of lignin particles from raw black liquor and their chemical modification, so that they can be used as efficient adsorbents to remove organic pollutants from water. For the production of adsorbent powders, pristine black liquor (as obtained from a pulping mill) was emulsified with epichlorohydrin and Span 80 and cured at elevated temperatures. Phospinic esters and organic sulphates were synthetically introduced to the lignin-backbone to modify the adsorbents. The adsorption of organic model compounds, Paraquat, p-nitrophenol, and malachite green were studied. Kinetic and thermodynamic data of the adsorption processes was obtained experimentally and by fitting mathematical models (Langmuir and Freundlich isotherms). Adsorbents showed adsorption capacities of Q_e = 62 mg/g for Paraquat, Q_e = 199 mg/g for p-nitrophenol, and Q_e = 1200 mg/g for malachite green in batch-adsorption experiments. These values are among the highest for any of the model compounds presented in literature. Adsorption occurred reasonably fast for all compounds, reaching plateau-adsorption within minutes to hours.

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.