1、Efficient removal of ammonia–nitrogen in wastewater by zeolite

The results showed that the CFA-based zeolite molecular sieves synthesized under optimized conditions exhibited excellent adsorption and removal rates (> 40%) for ammonia–nitrogen in...

2、Metal ion/metal hydroxide loaded resin for ammonia removal from

Herein, metal (ion)-loaded resins (Me (ion)-LR) were prepared and the stability of metal ions during the three-round ammonia adsorption–desorption process was studied.

3、Treatment of wastewater containing high concentrations of ammonia

The maxi-mum adsorption capacities of the D61 and D708 resins were 44.93 and 31.34 mg/g, respectively; removing ammonia nitrogen from 1 m3 of wastewa-ter requires only 100–110 g of ion exchange resin.

Optimization of ammonia removal by ion

The main objective of this study was to evaluate and optimize ammonia removal by synthetic ion-exchange resin using factorial design and response surface methodology (RSM). The effect of different operational factors including pH, ion-exchange resin dose and temperature was also investigated.

Enhanced Ion

The 360ip Partners’ invention employs a proprietary technique to produce an ion-exchange resin with both high ammonia and ammonium ion adsorption. The ion-exchange resin can be regenerated easily to be reused multiple times.

Removal of High Concentration of Ammonia from Wastewater by the Ion

So, the ion exchange resins can behold more ammonia from aqueous solution and the removal rate of ammonia is increasing. When the adsorption process reached equilibrium, the removal rate of ammonia began to keep stabilization.

Enhancing Resource Recovery through Electro

Ultimately, this study advances understanding of ammonia-selective resins that can facilitate high-purity, selective, and durable recovery of nutrients from waste streams.

Optimization of ammonia removal by ion

The results showed that Amberlite ion-exchange resin was effective in removing ammonia from aqueous solution. Factorial design and response surface methodology were applied to evaluate and optimize the effects of pH, resin dose, contact time, temperature and initial ammonia concentration.

Removal of Ammonia from wastewater by ion exchange technology

Ammonium removal from aqueous solution by a natural ion-exchange resin was investigated by considering the factors affecting the ammonium-exchange capacity including the zeolites’ particle size, the loading flow rates and the impact of a number of regenerations upon the ion-exchange capacity.

Combination of Na

The field experiments to treat bio-treated secondary effluent proved that the reduction of dissolved organic matter by the magnetic anion exchange resin improved the removal efficiency of ammonia–nitrogen by the zeolite.

Research Progress on Ammonia Nitrogen Removal Technology Using Modified Ion Exchange Resins

Introduction

With the acceleration of industrialization, water resource pollution has become increasingly severe. Particularly in agriculture, animal husbandry, and urban sewage treatment, ammonia nitrogen (NH₃-N), as a primary inorganic nitrogen pollutant in water bodies, poses significant threats to the environment and human health. Excessive ammonia nitrogen emissions not only impair the self-purification capacity of water bodies but may also lead to toxic effects through bioaccumulation in the food chain. developing efficient ammonia nitrogen removal methods has become an urgent task in environmental protection.

Sources and Hazards of Ammonia Nitrogen

Ammonia nitrogen primarily originates from domestic sewage, farmland drainage, and industrial wastewater. During sewage treatment, ammonia nitrogen can be removed via biological degradation, chemical precipitation, or ion exchange. traditional physicochemical treatment processes often struggle to achieve high-efficiency removal, especially under conditions of high concentration and complex water quality.

Application of Ion Exchange Resins in Ammonia Nitrogen Removal

1. Basic Concept of Ion Exchange Resins

Ion exchange resins are polymer materials with specific pore structures and functional groups that enable ion exchange with ions in solutions. In ammonia nitrogen removal, ion exchange resins serve as highly efficient adsorbents, trapping ammonia nitrogen molecules through their porous structures.

2. Design Principles of Modified Ion Exchange Resins

To enhance the adsorption efficiency and selectivity of resins for ammonia nitrogen, researchers have modified resins using approaches such as surfactant modification, polymer cross-linking, and nanomaterial doping. These modifications alter the surface properties of the resins, increasing their affinity for ammonia nitrogen and thereby improving removal efficiency.

3. Performance Optimization of Modified Ion Exchange Resins

Modifications to resins significantly improve ammonia nitrogen removal performance. For example, surfactant-modified resins increase adsorption capacity, while nanomaterial-doped resins enhance compressive strength and mechanical stability. Additionally, fine-tuning operational conditions such as pH, temperature, and contact time allows for precise control of ammonia nitrogen removal outcomes.

Practical Application Cases of Ammonia Nitrogen Removal

1. Domestic Sewage Treatment

In domestic sewage treatment, modified ion exchange resins are widely used for ammonia nitrogen removal. For instance, a municipal sewage treatment plant adopted modified ion exchange resins as the primary ammonia nitrogen removal equipment, successfully reducing ammonia nitrogen concentrations in effluent to below national standards.

2. Industrial Wastewater Treatment

Industrial wastewater typically contains high ammonia nitrogen concentrations, which traditional methods often fail to address adequately. By employing modified ion exchange resins as pretreatment equipment, ammonia nitrogen can be effectively removed without compromising water quality, providing favorable conditions for subsequent advanced treatment.

modified ion exchange resins demonstrate significant advantages in ammonia nitrogen removal. Through modifications such as surfactant treatment and polymer cross-linking, resin adsorption efficiency and selectivity for ammonia nitrogen are substantially improved. In practical applications, fine-tuning operational conditions enables precise control of removal effects. In the future, with advancements in new materials and technologies, the application of modified ion exchange resins in ammonia nitrogen removal is expected to become broader and more efficient.