Adsorption–desorption characteristics of nitrate, phosphate and sulfate on Mg–Al layered double hydroxide

Halajnia, Akram; Oustan, Shahin; Najafi, Nosratollah; Khataee, Alireza; Lakzian, Amir

doi:10.1016/j.clay.2013.05.002

Cited by 189 publications

(96 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They suggested that NO3-hydrotalcite applied to soils as a fertilizer would be almost irreversibly converted to either PO4 or CO3-hydrotalcite over time by exchange with nitrate. However, according to other research (Halajnia et al, 2013), Mg-Al-LDH (4:1) with the low layer charge density showed high NO3 -adsorption rate and adsorption capacity compared with phosphate and sulfate. Halajnia et al (2013) Use of kaolin for slow release fertilizers Kaolin is a type of clay minerals consisting mainly of hydrated aluminumsilicate or kaolinite formed through hydrothermal alteration of feldspar and muscovite, usually containing quartz (Prasad et al, 1991).…”

Section: +mentioning

confidence: 99%

“…However, according to other research (Halajnia et al, 2013), Mg-Al-LDH (4:1) with the low layer charge density showed high NO3 -adsorption rate and adsorption capacity compared with phosphate and sulfate. Halajnia et al (2013) Use of kaolin for slow release fertilizers Kaolin is a type of clay minerals consisting mainly of hydrated aluminumsilicate or kaolinite formed through hydrothermal alteration of feldspar and muscovite, usually containing quartz (Prasad et al, 1991). Kaolin was used as a nutrient-carrier through a mechanochemical process like milling to reduce the crystallinity of kaolin and to simultaneously allow incorporation of nutrients into its structure.…”

Section: +mentioning

confidence: 99%

“…(Komarneni et al, 1996;De Roy et al, 2001;Khan and O'Hare, 2002) even at room temperature. Since LDH has positive charges on a layer surface and thus could be used as a nitrate carrier or for controlled nitrate release for agricultural uses, several studies have been conducted for nitrate ion release characteristics to check the feasibility of LDH as the slow release fertilizer (Komarneni et al, 2003;Gillman and Noble, 2005;Halajnia et al, 2013;Urena-Amate et al, 2011;Torres-Dorante et al, 2009). Komarneni et al (2003) carried out the experiment of nitrate release from several LDHs in simulated soil solutions and investigated the influences of the type of anions present in the soil solution, their concentration, and crystal size and charge density of LDHs.…”

Section: +mentioning

confidence: 99%

See 2 more Smart Citations

Mineral-Based Slow Release Fertilizers: A Review

Noh¹,

Komarneni²,

Park³

2015

Korean Journal of Soil Science and Fertilizer

View full text Add to dashboard Cite

Global population is expected to reach nine billion in 2050 and the total demand for food is expected to increase approximately by 60 percent by 2050 as compared to 2005. Therefore, it is important to increase crop production in order to meet the global demand for food. Slow release fertilizers have been developed and designed in order to improve the efficiency of fertilizers. Mineral-based slow release fertilizers are useful because the minerals have a crystalline structure and are environmentally friendly in a soil. This review focuses on slow release fertilizers based on montmorillonite, zeolite, and layered double hydroxide phases as a host for nutrients, especially N. Urea was successfully stabilized in the interlayer space of montmorillonite by the formation of urea-Mg or Ca complex, [(Urea) 6 Mg or Ca] 2+ protecting its rapid degradation in soils. Naturally occurring zeolites occluded with ammonium nitrate and potassium nitrate by molten salt treatment could be used as slow release fertilizer because the occlusion process increased the capacity of zeolites to store nutrients in addition to exchangeable cations. Additionally, surface-modified zeolites could also be used as slow release fertilizer because the modified surface showed high affinity for anionic nutrients such as nitrate and phosphate. Moreover, there were attempts to develop and use synthetic layered double hydroxide as a carrier of nitrate because it has positively charged layers which electrostatically bond nitrate anions. Kaolin was also tested by combining with a polymer or through the mechanical-chemical process for slow release of nutrients.

show abstract

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

Mineral-Based Slow Release Fertilizers: A Review

Noh¹,

Komarneni²,

Park³

2015

Korean Journal of Soil Science and Fertilizer

View full text Add to dashboard Cite

show abstract

“…In addition, metal ions such as calcium, iron and their metal oxides are hydrated on the surface of MSS to form hydroxides and hydrated metal oxides so that there are a large number of hydroxyl groups in a mutually associative or separate form present at the interface of the adsorbent, which has been confirmed in the infrared spectrum (Figure 10). Thus, the nitrate may be adsorbed by ion exchange (Equation (10), Figure 11I) [22,29,51,52] or through hydrogen bonding (Equation (11), Figure 11II) [38] with the hydroxyl group. According to the above model and related characterization analysis, chemical adsorption plays a major role in the removal of nitrate from modified steel slag.…”

Section: Removal Mechanismmentioning

confidence: 99%

Characteristics of Nitrate Removal from Aqueous Solution by Modified Steel Slag

Yang

et al. 2017

Water

View full text Add to dashboard Cite

Steel slag, which makes up a gigantic amount of metallurgical industrial solid waste, was in this experiment successfully synthesized an inexpensive adsorbent used to remove nitrate pollution from aqueous solution. This adsorbent was obtained by mixing steel slag, aluminium hydroxide and deionized water, and aging this at a mass ratio of 3:0.45:2, and then activating it at 800 • C. The physicochemical characteristics of the steel slag before and after modification were investigated to compare the effect of their surface properties on the adsorption behaviour of nitrate. The effects of adsorbent dosage, pH, and contact time on the adsorption process were investigated. The results showed that an increase in specific surface area and the formation of a positive surface of the modified steel slag (MSS) compared with the original steel slag (OSS) could effectively increase the number of the active adsorption sites and nitrate removal ability. The optimum parameters for nitrate removal were as follows: the concentration of nitrate was 20 mg/L, the dosage was 1 g/100 mL, the pH was four, and the reaction time was 180 min. The adsorption capacity of the MSS was approximately 1.9 times that of the OSS. The nitrate adsorption of the MSS was in accordance with the pseudo-second-order model and the Freundlich model, which indicated that the adsorption of nitrate on the MSS was mainly single layer chemical adsorption. The mechanism of nitrate removal mainly included ion exchange, hydrogen bonding, electrostatic interactions and intermolecular interactions. In addition, regeneration experiments indicated that the MSS after regeneration still had the capacity to remove nitrate.

show abstract

“…In order to prevent eutrophication, it is considered to reduce the load of phosphorus and nitrate to water environment. One method is the removal of phosphate and nitrate ion by HT [24]- [28]. However, HT is an expensive material used as antacid, etc., and it is necessary to develop a new process for inexpensive HT.…”

mentioning

confidence: 99%

Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Wajima¹

2015

IJCEA

View full text Add to dashboard Cite

Abstract-In this study, hydrotalcite was synthesized from bittern solution with addition of AlCl 3 (Mg/Al molar ratio of the solution = 3), and its removal abilities of phosphate and nitrate from aqueous solution were examined. Hydrotalcite can be synthesized from bittern and seawater, and the product from bittern is higher content of hydrotalcite than that from seawater. The product from bittern has a removal abilities of phosphate and nitrate, which were higher than commercial hydrotalcite. The equilibrium adsorption capacity of the product for phosphate and nitrate ions were measured and extrapolated using Langmuir and Freundlich isotherm models, and experimental data are found to fit Langmuir than Freundlich. In the solution with 1 mM of phosphate or nitrate ions, adsorption of phosphate on the product was saturated within 30 min and almost constant after 30 min, while that of nitrate increase within 15 min and then gradually decrease, due to the ion exchange reaction of chlorine and sulphate in the product.Index Terms-Hydrotalcite, bittern, removal of phosphorus and nitrate, anion exchange.

show abstract

Adsorption–desorption characteristics of nitrate, phosphate and sulfate on Mg–Al layered double hydroxide

Cited by 189 publications

References 52 publications

Mineral-Based Slow Release Fertilizers: A Review

Mineral-Based Slow Release Fertilizers: A Review

Characteristics of Nitrate Removal from Aqueous Solution by Modified Steel Slag

Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Contact Info

Product

Resources

About