Zeolite from alkali modified kaolin increases NH4+ retention by sandy soil : column experiments
Zwingmann, Naoko, Singh, Balbir, Mackinnon, Ian D.R., & Gilkes, Robert J. (2009) Zeolite from alkali modified kaolin increases NH4+ retention by sandy soil : column experiments. Applied Clay Science, 46(1), pp. 7-12.
Sandy soils have low water and nutrient retention capabilities so that zeolite soil amendments are used for high value land uses including turf and horticulture to reduce leaching losses of NH4+ fertilisers. MesoLite is a zeolitic material made by caustic treatment of kaolin at 80-95oC. It has a moderately low surface area (9-12m2/g) and very high cation exchange capacity (494 cmol(+)/kg). Laboratory column experiments showed that an addition of 0.4% MesoLite to a sandy soil greatly (90%) reduced leaching of added NH4+ compared to an unamended soil and MesoLite is 11 times more efficient in retaining NH4+ than natural zeolite. Furthermore, NH4+-MesoLite slowly releases NH4+ to soil solution and is likely to be an effective slow release fertiliser.
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|Item Type:||Journal Article|
|Keywords:||zeolite, ammonium retention, column leaching, cation exchange capacity|
|Subjects:||Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > OTHER AGRICULTURAL AND VETERINARY SCIENCES (079900) > Fertilisers and Agrochemicals (Application etc.) (079902)|
|Divisions:||Current > QUT Faculties and Divisions > Division of Research and Commercialisation|
|Deposited On:||01 Jun 2010 21:12|
|Last Modified:||26 Feb 2013 23:48|
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