Avocado seed-derived activated carbon for mitigation of aqueous ammonium

Zhu, Yiying; Kolar, Praveen; Shah, Sanjay B.; Ji, Cheng; Lim, Phooi K.

doi:10.1016/j.indcrop.2016.07.016

Cited by 57 publications

(27 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Table illustrates the adsorption capacities of different adsorbents from previous studies that investigated the removal of

{normalN normalH}_{4}^{+} ‐ normalN

from aqueous solution and synthetic wastewaters. In comparison with other adsorbents, the adsorption capacity of CCB is satisfactory but generally of smaller value when utilized in the removal of

{normalN normalH}_{4}^{+} ‐ normalN

…”

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

Luna

Futalan²,

Jurado

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

Wastewater containing high concentration of ammonium‐nitrogen ( normalNnormalH4+‐normalN) is not effectively addressed by biological treatment and when released into water bodies can cause eutrophication. In this study, the removal of normalNnormalH4+‐normalN from simulated wastewater using chitosan‐coated bentonite (CCB) was investigated. The effects of normalNnormalH4+ salt used, pH, CCB dosage, agitation rate, and temperature on the removal of normalNnormalH4+‐normalN were studied. The highest normalNnormalH4+‐normalN removal of 67.5% was attained at the following conditions: initial pH 4.0, CCB dose of 8.0 g, agitation rate of 150 rpm, and temperature of 35 °C. Fourier transform infrared analysis indicated two mechanisms: normalNnormalH4+‐normalN adsorption onto CCB involving hydrogen bonding with hydroxyl groups (OH) and ion exchange between normalNnormalH4+‐normalN and cations present in the interlayer of bentonite. Experimental data follows the pseudo‐second‐order kinetic model (R2 = 0.9964) and Koble–Corrigan isotherm (R2 = 0.9705). Thermodynamic studies showed that the adsorption process is spontaneous (ΔG0 < 0), endothermic (ΔH0 > 0) in nature, and leads to an increase in randomness at the solid–solution interface (ΔS0 > 0). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45924.

show abstract

“…Table illustrates the adsorption capacities of different adsorbents from previous studies that investigated the removal of

{normalN normalH}_{4}^{+} ‐ normalN

from aqueous solution and synthetic wastewaters. In comparison with other adsorbents, the adsorption capacity of CCB is satisfactory but generally of smaller value when utilized in the removal of

{normalN normalH}_{4}^{+} ‐ normalN

…”

Section: Resultsmentioning

confidence: 97%

“…From eq. , aqueous NH 3 is generated at basic pH where it does not have any affinity to be adsorbed onto CCB and would remain in the solution instead . In addition, a solution with basic pH would contain more negatively‐charged hydroxyl ions as background electrolyte that would neutralize

{normalN normalH}_{4}^{+} ‐ normalN

species.…”

Section: Resultsmentioning

confidence: 99%

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

Luna

Futalan²,

Jurado

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Meanwhile, ammonia is also a body of water nutrients, which can cause overproduction of water organisms, resulting in the formation of red tide blooms and other anomalies. In addition, ammonia wastewater can also corrode pipes and equipments . Although ammonia is a pollutant in water, it is also a fertilizer.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, ammonia wastewater can also corrode pipes and equipments. [4][5][6] Although ammonia is a pollutant in water, it is also a fertilizer. Therefore, the recovery of ammonia from wastewater protects the environment and contributes to an efficient use of resources.…”

Section: Introductionmentioning

confidence: 99%

Effective removal of ammonia from wastewater using hollow fiber renewal liquid membrane

Liu

Wang

et al. 2018

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

A new method using hollow fiber renewal liquid membrane (HFRLM) for treatment of ammonia wastewater was proposed. Di‐(2‐ethylhexyl) phosphoric acid (D2EHPA)‐kerosene and hydrogen chloride solution were selected as the extraction system and stripping phase for removal of ammonia from wastewater, respectively. The extraction equilibrium experiments were performed to confirm the feasibility of the extraction process. Effects of operating conditions and the composition of liquid membrane phase on mass transfer behavior of HFRLM were investigated. The treatment of ammonia wastewater with Mode 2 had a better mass transfer performance than that with Mode 1. In Mode 2, the feed phase and stripping phase flowed through the shell side and tube side, respectively. To a certain extent, the increases of D2EHPA concentration, hydrochloric acid concentration, and ammonia concentration were conducive to the increase of mass transfer flux of ammonia. After 10 stages of cascade experiments, the concentration of ammonia in wastewater at the outlet was less than 15 mg L−1. Besides, the final ammonia concentration decreased to 8.4 mg L−1 through the HFRLM recycling experiments. Based on series‐resistance model and the surface renewal theory, an appropriate mass transfer model was established and verified, which could be used to predict experimental results.

show abstract

“…Using the correct materials is essential in the application of adsorption technology. The main materials used for ammonia nitrogen removal are zeolite [16], modified zeolite [17,18], coal gangue [19], and carbon [20]. These materials all have different abilities with respect to the removal of ammonia nitrogen and the interaction mechanisms were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Nitrogen Removal from Aqueous Solutions Using Natural Scoria

Dong

Zhang

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:The efficiencies and mechanisms of nitrogen removal from groundwater by scoria were studied. When NH 4 + -N concentration was 0.5-10 mg/L, the removal was 96-89%. When NO 2 − -N concentration was 0.1-5 mg/L, the removal was 93-85%. When NO 3 − -N concentration was 30-150 mg/L, the removal was 85-70%. Additionally, van der Waals forces had a positive impact on the adsorption, which promoted NH 4 + -N adsorption. Ion exchange and dissolution did not exist. Functional groups of N-H, C-H, and C-N changed after adsorption. Overall, this study indicates that scoria is an ecologically friendly and safe material that can be utilized for groundwater purification to treat nitrogen-contaminated water.

show abstract

Avocado seed-derived activated carbon for mitigation of aqueous ammonium

Cited by 57 publications

References 37 publications

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

Effective removal of ammonia from wastewater using hollow fiber renewal liquid membrane

Mechanism of Nitrogen Removal from Aqueous Solutions Using Natural Scoria

Contact Info

Product

Resources

About