In Italy, the quality of drinking water is regulated by Law Decree n. 31, dated 2-2-2001, which has implemented the European Directive 98/83. The aim of this Law Decree is the protection of human health from the adverse effects of any contamination of water used for human consumption. The Decree imposes (art. 4) that water used for potable purpose must meet the minimum quality requirements included in the Annex 1, Parts A, B and C (microbiological, chemical and indicator parameters). These quality standards had to be enforced by 25-12-2003 (art. 15). Furthermore, compared to previous L.D. n.236/88, the L.D. 31/01 introduces new parameters, such as some disinfection by-products (trihalomethanes, chlorides and bromides) and more restrictive limits for toxic metals such as arsenic, lead and nickel. The introduction of new and more restrictive limits has caused the non-compliance for some water resources already used or potentially used as drinking water supply. In the Mount Etna area (Sicily), for instance, a substantial part of groundwater, used by local population for potable purpose, has concentrations of some chemical parameters included in Annex I of L.D. 31/01, higher than the maximum contaminant level (MCL). Vanadium, iron and manganese are some of the parameters that have revealed concentrations higher than the MCL imposed by the Annex I of L.D.. Moreover studies on some well waters of Mount Etna area have revealed concentrations of some toxic metals, like arsenic and lead, slightly higher than the new MCL. These considerations emphasize the need to carry out detailed studies to verify the possibility of treating these water resources used for human consumption, in order to assure the necessary qualitative requirements. This paper present preliminary results of an ongoing study aiming at studying the removal below the MCL imposed by L.D. 31/01 of some micro-contaminants, such as vanadium, iron, manganese, arsenic and lead, from Mount Etna groundwater currently used for potable purposes, by bench scale and pilot scale experiments. Since the upgrade of the existing treatment plants or the construction of new ones to respect the limits imposed by L.D. 31/01, will cause a sensitive increasing of capital, operational and management costs, this research also aims at evaluating capital and operational costs for the treatment alternatives that have achieved the best results.

In Italy, the quality of drinking water is regulated by Law Decree n. 31, dated 2-2-2001, which has implemented the European Directive 98/83. The aim of this Law Decree is the protection of human health from the adverse effects of any contamination of water used for human consumption. The Decree imposes (art. 4) that water used for potable purpose must meet the minimum quality requirements included in the Annex 1, Parts A, B and C (microbiological, chemical and indicator parameters). These quality standards had to be enforced by 25-12-2003 (art. 15). Furthermore, compared to previous L.D. n.236/88, the L.D. 31/01 introduces new parameters, such as some disinfection by-products (trihalomethanes, chlorides and bromides) and more restrictive limits for toxic metals such as arsenic, lead and nickel. The introduction of new and more restrictive limits has caused the non-compliance for some water resources already used or potentially used as drinking water supply. In the Mount Etna area (Sicily), for instance, a substantial part of groundwater, used by local population for potable purpose, has concentrations of some chemical parameters included in Annex I of L.D. 31/01, higher than the maximum contaminant level (MCL). Vanadium, iron and manganese are some of the parameters that have revealed concentrations higher than the MCL imposed by the Annex I of L.D.. Moreover studies on some well waters of Mount Etna area have revealed concentrations of some toxic metals, like arsenic and lead, slightly higher than the new MCL. These considerations emphasize the need to carry out detailed studies to verify the possibility of treating these water resources used for human consumption, in order to assure the necessary qualitative requirements. This paper present preliminary results of an ongoing study aiming at studying the removal below the MCL imposed by L.D. 31/01 of some micro-contaminants, such as vanadium, iron, manganese, arsenic and lead, from Mount Etna groundwater currently used for potable purposes, by bench scale and pilot scale experiments. Since the upgrade of the existing treatment plants or the construction of new ones to respect the limits imposed by L.D. 31/01, will cause a sensitive increasing of capital, operational and management costs, this research also aims at evaluating capital and operational costs for the treatment alternatives that have achieved the best results.

Removal of natural contaminants from water supplies intended for human consumption

ROCCARO, PAOLO;Mancini G;VAGLIASINDI, Federico
2005

Abstract

In Italy, the quality of drinking water is regulated by Law Decree n. 31, dated 2-2-2001, which has implemented the European Directive 98/83. The aim of this Law Decree is the protection of human health from the adverse effects of any contamination of water used for human consumption. The Decree imposes (art. 4) that water used for potable purpose must meet the minimum quality requirements included in the Annex 1, Parts A, B and C (microbiological, chemical and indicator parameters). These quality standards had to be enforced by 25-12-2003 (art. 15). Furthermore, compared to previous L.D. n.236/88, the L.D. 31/01 introduces new parameters, such as some disinfection by-products (trihalomethanes, chlorides and bromides) and more restrictive limits for toxic metals such as arsenic, lead and nickel. The introduction of new and more restrictive limits has caused the non-compliance for some water resources already used or potentially used as drinking water supply. In the Mount Etna area (Sicily), for instance, a substantial part of groundwater, used by local population for potable purpose, has concentrations of some chemical parameters included in Annex I of L.D. 31/01, higher than the maximum contaminant level (MCL). Vanadium, iron and manganese are some of the parameters that have revealed concentrations higher than the MCL imposed by the Annex I of L.D.. Moreover studies on some well waters of Mount Etna area have revealed concentrations of some toxic metals, like arsenic and lead, slightly higher than the new MCL. These considerations emphasize the need to carry out detailed studies to verify the possibility of treating these water resources used for human consumption, in order to assure the necessary qualitative requirements. This paper present preliminary results of an ongoing study aiming at studying the removal below the MCL imposed by L.D. 31/01 of some micro-contaminants, such as vanadium, iron, manganese, arsenic and lead, from Mount Etna groundwater currently used for potable purposes, by bench scale and pilot scale experiments. Since the upgrade of the existing treatment plants or the construction of new ones to respect the limits imposed by L.D. 31/01, will cause a sensitive increasing of capital, operational and management costs, this research also aims at evaluating capital and operational costs for the treatment alternatives that have achieved the best results.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/3587
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