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Arsen u podzemnoj vodi iz prirodnih izvora

Arsenic from natural sources in groundwater


Ratko Vasiljević1

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SažetakAbstract

 

Arsen je polumetal svrstan među najopasnija zaganivala. Istraživanja pojave arsena u podzemnoj vodi i njegovog ponašanja u okolišu povećala su se tijekom zadnjeg desetljeća. Danas su problemi s arsenom zabilježeni u brojnim zemljama svijeta u različitim geološkim sredinama. Koncentracije arsena su u pitkoj vodi uglavnom niske, međutim u nekim uvjetima mogu značajno prelaziti propisane koncentracije te uzrokovati potencijalnu opasnost za ljudsko zdravlje. Povišene koncentracije arsena u podzemnoj vodi mogu biti posljedica antropogenog i prirodnog utjecaja. Ukoliko se radi o antropogenom izvoru, puno ga je lakše definirati. Ukoliko je izvor arsena u vodi prirodnog porijekla, njegovo određivanje je često puta zahtjevnije. Ovaj rad prikazuje pregled nekih istraživanja provedenih tijekom zadnjih desetak godina na područjima gdje su zabilježene visoke koncentracije arsena iz prirodnih izvora, te ukazuje na brojne nejasnoće koje će biti potrebno riješiti u budućnosti.

 

Arsenic is a semimetal which ranks among the most dangerous pollutants. Exploration of arsenic in groundwater and its behavior in the environment has increased significantly over the last decade. Today, the problems with arsenic are registered in many countries in different geological environments. Although concentrations of arsenic in drinking water are generally low, in some circumstances they may significantly exceed the prescribed concentrations and cause a potentially significant risk to human health. Elevated concentrations of arsenic in groundwater may be caused by anthropogenic and natural influences. Anthropogenic impacts can be easily explained, unlike some natural conditions, where this is much harder. This paper presents an overview of some research conducted over the past decade in areas affected by arsenic from natural sources, and indicates to many uncertainties that need to be addressed in the future.

 

Ključne riječiKey words

 

arsen, onečćenje, hidrogeokemija, podzemna voda, svijet

arsenic, pollution, hydrogeochemistry, groundwater, aquifer

 

Podaci o autorimaAuthors affiliations

 

1ECOINA, d.o.o., Ul. SR Njemačke 10, 10000 Zagreb

 

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