Abstract
Increasing surface and groundwater pollution by ammonium and nitrate makes it necessary to find
solutions with minimal environmental impacts. For this purpose, using abundant and high sorption
potential soil minerals offers cost-effective and environmentally sound remediation techniques. In this
study, Firoozkouh and Semnan zeolites were used for removal of nitrate and ammonium from
laboratory solutions and groundwater (Batch method). Zeolite minerals were modified by using the

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Abstract
Soils contaminated with heavy metals constitute a serious and widespread ecological problem but to clean such soils requires
strong chemicals such as polycarboxylates; frequently ethylenediaminetetraacetic acid and nitrilotriacetic acid are used.
However, these compounds are synthetic and toxic and their replacement by natural products such as soluble humic
substances as washing agents for cleaning heavy metal polluted soils would be environmentally very attractive. In fact, such a

Abstract