Selective Recovery of Ammonia Nitrogen from Wastewaters with Transition Metal-Loaded Polymeric Cation Exchange Adsorbents

© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim..

Extracting valuable products from wastewaters with nitrogen-selective adsorbents can offset energy-intensive ammonia production, rebalance the nitrogen cycle, and incentivize environmental remediation. Separating nitrogen (N) as ammonium from other wastewater cations (e.g., K+ , Ca2+ ) presents a major challenge to N removal from wastewater and N recovery as high-purity products. High selectivity and capacity were achieved through ligand exchange of ammonia with ammine-complexing transition metals loaded onto polymeric cation exchange resins. Compared to commercial resins, metal-ligand exchange adsorbents exhibited higher ammonia removal capacity (8 mequiv g-1 ) and selectivity (N/K+ equilibrium selectivity of 10.1) in binary equimolar solutions. Considering optimal ammonia concentrations (200-300 mequiv L-1 ) and pH (9-10) for metal-ligand exchange, hydrolyzed urine was identified as a promising candidate for selective TAN recovery. However, divalent cation exchange increased transition metal elution and reduced ammonia adsorption. Ultimately, metal-ligand exchange adsorbents can advance nitrogen-selective separations from wastewaters.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:26

Enthalten in:

Chemistry (Weinheim an der Bergstrasse, Germany) - 26(2020), 44 vom: 06. Aug., Seite 10099-10112

Sprache:

Englisch

Beteiligte Personen:

Clark, Brandon [VerfasserIn]
Tarpeh, William A [VerfasserIn]

Links:

Volltext

Themen:

Circular economy
Ion exchange
Journal Article
Ligand design
Resource recovery
Waste valorization

Anmerkungen:

Date Completed 27.11.2020

Date Revised 27.11.2020

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1002/chem.202002170

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM310801915