Isotherms, Kinetics, and Thermodynamics of NH4+ Adsorption in Raw Liquid Manure by Using Natural Chabazite Zeolite-Rich Tuff

Abstract

The search for safer and sustainable management of animal manure is a global and topical challenge, in particular for the reduction of nitrogen (N) content. The use of natural adsorbents as zeolite-rich tuffs is recognized as a valid method to recover N, in the form of ammonium (NH4+), from animal manure. While the scientific literature is rich in studies performed on synthetic solutions and using clinoptilolite zeolites as adsorbent, it lacks information concerning adsorption in real liquid manure and using other types of zeolite-rich tuffs (e.g., chabazite). This work aims at exploring the NH4+ adsorption process from raw liquid swine manure, using a chabazite-rich zeolite tuff as adsorbent. The effects of temperature, contact time, and grain size have been assessed. Isotherms, kinetic models, and thermodynamic parameters have been investigated. Harkins-Jura isotherm correlates well with the observed data, in accordance with the formation of an adsorption multilayer. Kinetic data have been explained by intraparticle diffusion and pseudo-second-order models. In conclusion, the natural chabazite tuff has proven to be a valid material for NH4+ adsorption from raw liquid swine manure. In particular, to reach the highest adsorption capacities and adsorption rates, it is recommended to use it at a fine particle size and with dosages < 6 %.

Amount and speciation of N leached from a sandy soil fertilized with urea, liquid digestate, struvite and NH4‐enriched chabazite zeolite‐tuff

“…STRV N was only present as NH 4 + ‐N as a component of the mineral structure (MgNH 4 PO 4 ) which is not very soluble in water (Achat et al, 2014). The N‐CHA was NH 4 + ‐N derived from CEC processes and adsorption (Galamini et al, 2020).…”

“…Some of the zeolitic units are of commercial interest since they are tens of meters thick and may contain up to 80% of zeolite minerals. During the last decade, Italian chabazitic‐zeolitite was deeply studied as media for N removal from animal slurries (Ferretti, Galamini, et al, 2020; Galamini et al, 2020) and the resulting material was then tested as an N‐rich soil amendment (N‐CHA) (Ferretti et al, 2021).…”

“…Some of the zeolitic units are of commercial interest since they are tens of meters thick and may contain up to 80% of zeolite minerals. During the last decade, Italian chabazitic-zeolitite was deeply studied as media for N removal from animal slurries (Ferretti, Galamini, et al, 2020;Galamini et al, 2020) and the resulting material was then tested as an N-rich soil amendment (N-CHA) (Ferretti et al, 2021). The purpose of this work was to compare common fertilization with urea (U) and LD to the use of "slow-release" alternatives such as STRV and N-rich chabazitic-zeolitite (N-CHA) obtained by recycling N from LD.…”

Effect of the Matrix Dam in the Paddy Field Drainage Ditch on Water Purification Based on the Physical Model Test

“…The matrix was a zeolite with an average particle size of 9-12 mm. The use of zeolite as the filling material of the matrix dam was due to its well-developed pore structure, large specific surface area, and stable physical and chemical properties [24][25][26][27].…”

Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

“…CHA zeolite can be also utilized for removing NH 4 + from wastewaters, including those that originated from livestock [42,43]. These "charged" zeolites, which have adsorbed consistent amounts of NH 4 + , can be eventually exploited as "slow-release" fertilizers to recycle the adsorbed N efficiently [28].…”