An evaluation of pretreated natural zeolites for ammonium removal

Klieve, J.R.; Semmens, Michael J.

doi:10.1016/0043-1354(80)90232-8

Cited by 94 publications

(63 citation statements)

References 5 publications

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“…The mordenite had a higher bulk density (BD) than the studied clinoptilolite (Table 1) and overseas mordenites (e.g., BD of 0.53-0.98 g cm" 3 ; Klieve & Semmens 1980;Bernal & Lopez-Real 1993). The higher BD of the studied mordenites means that Nguyen & Tanner-Natural zeolites for ammonium removal from wastewaters greater quantities can be packed into a given volume than for the studied clinoptilolite.…”

Section: Zeolite Physical and Chemical Characteristicsmentioning

confidence: 99%

“…However, the studied zeolites had a lower water holding capacity (WHC) and cation exchange capacity (CEC) than overseas zeolites (WHC and CEC of 133-170% and 150-200 me. %, respectively; Koon & Kaufman 1975;Klieve & Semmens 1980;Schoeman 1986;Bernal & Lopez-Real 1993;Boettingeretal. 1995;Booker et al 1996).…”

Section: Zeolite Physical and Chemical Characteristicsmentioning

confidence: 99%

“…These wastewaters were used to investigate the influence of wastewater composition and NH4" 1 " concentration on the NH4 + removal capacity of zeolites. The synthetic effluent solution (Table 3) was prepared using the same chemical composition as that used by Klieve & Semmens (1980). It contained no organics or suspended solids.…”

Section: Batch Adsorption Studymentioning

confidence: 99%

“…Samples of leachate (thereafter referred to as effluent) were then collected from beneath each PVC column every 1-2 BV for NH4 + analysis. The slow loading flow rate was carried out to resemble that likely in constructed wetlands, Table 3 Composition of synthetic effluent (Klieve & Semmens 1980 whereas the fast flow rate was designed to assess the capacity of the zeolite with the highest capacity to remove NH4"1" (as shown from the batch and slow flow-through experiments) in situations where wastewaters would pass more rapidly through a zeolite bed (e.g., pulsed loadings of wastewaters from stock yards).…”

Section: Flow-through Studymentioning

confidence: 99%

“…The capacity of zeolites to remove NH 4 + from wastewaters has been found to vary, depending on the type of zeolite used (e.g., mordenite, clinoptilolite, erionite, chabazite, and phillipsite), zeolite particle size, and wastewater anion-cation composition (Koon & Kaufman 1975;428 New Zealand Journal of Agricultural Research, 1998, Vol. 41 Jorgensen et al 1976Klieve & Semmens 1980). This capacity is also governed by the extent of aluminium (Al 3+ ) substitution for silicon (Si 4+ ) in the zeolite framework (Barrer 1978;Bohn et al 1979).…”

Section: Introductionmentioning

confidence: 99%

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Ammonium removal from wastewaters using natural New Zealand zeolites

Nguyen

Tanner

1998

New Zealand Journal of Agricultural Research

179

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Ammoniacal nitrogen (ammonia and ammonium) in agricultural wastewaters can promote eutrophication of receiving waters and be potentially toxic to fish and other aquatic life. Zeolites, which are hydrated aluminum-silicate minerals, have an affinity for ammonium ions (NH 4 + ) and are, therefore, potentially useful in removing this contaminant from wastewaters. The major objectives of this study were to evaluate the capacity of two natural New Zealand zeolites (clinoptilolite and mordenite) to remove NH 4 + from a range of wastewaters under both batch and flowthrough conditions. Effects of two zeolite particle size ranges (0.25-0.50 mm and 2.0-2.83 mm) on NH 4 + removal performance were also investigated. Results obtained from the batch adsorption experiments indicated that both zeolites tested, regardless of their particle sizes, were equally effective (87-98%) -3 of wastewater throughput, which equates up to 5.8-6.5 g NH 4 -N kg -1 zeolite. In contrast, at a faster loading flow rate (15.9 mm min -1 ), the breakthrough was almost immediate (1 BV) for coarse zeolites and after 22 BVs for fine zeolite. The NH 4 + breakthrough capacity for fine mordenite was 2.0-4.4 g NH 4 -N kg -1 zeolite. Fine zeolites were more effective than coarse zeolites in removing wastewater NH 4 + (95% and 55% removal, respectively), even after receiving 64 BV of wastewater.

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Section: Zeolite Physical and Chemical Characteristicsmentioning

confidence: 99%

Section: Zeolite Physical and Chemical Characteristicsmentioning

confidence: 99%

Section: Batch Adsorption Studymentioning

confidence: 99%

Section: Flow-through Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ammonium removal from wastewaters using natural New Zealand zeolites

Nguyen

Tanner

1998

New Zealand Journal of Agricultural Research

179

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Sorption of Ammonium‐Ions by Clinoptilolite and by Strongly Acidic Cation Exchangers

Vokáčová

Matějka

Eliášek

1986

Acta hydrochim. hydrobiol.

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The sorption capacity of two natural sorbents of different origin and of Wofatit KPS is determined by dynamic laboratory investigations and the influence of a thermal pretreatment of clinoptilolite, of the type and quantity of regenerants and of the presence of other cations is investigated. There are represented results of the ammonia removal from biologically treated municipal wastewater and of the removal of caesium-ions from laundry wastewaters. The capacity of clinoptilolite is lower than that of the ion-exchange resin, but clinoptilolite has the advantage of a considerably higher affinity for ammonium-ions, so that it can be used also in the presence of other salts in water t o be treated. The ammonium concentration should not exceed 30 mg/l, in order t o avoid too short filter runs.

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