Abstract

The accidental or continuous release of residual chlorine in water reclaimed for irrigational purposes could compromisethe crop yield and increase the load of toxic organo-halogenated compounds, posing additional risks forenvironment and human health.This studywas aimed at assessing the consequences of using chlorinatedwater for irrigating lettuce crops grownin pots with two different types of soil.The results show that the accumulation of extractable organo-halogenated compounds (EOX) in soil, roots andleaves is directly related to the chlorine concentration in the irrigation water. The accumulation of EOX insandy soils is not significant, while it reached up to 300% of the control in the silty-clay soil, demonstratingthat the phenomenon is linked to the organicmatter content in the soil. The accumulation of EOX in the soil appearsto play a significant role in subsequent bioaccumulation in cultures irrigated with tap water (long termmemory effect). Chloramines also demonstrated to have similar impacts as the free chlorine from hypochlorite.The consistent bioaccumulation of 400-700 ?gCl kg-1 of EOX in the leaves of crops irrigated with just0.2 mgCl L-1 of residual chlorine, as compared to levels below the detection limit of 75 ?gCl kg-1 in the controlcrops, evidences the potential impact on food chain and human health.

Autore Pugliese

• Laera Giuseppe

Tutti gli autori

• Lonigro A.; Montemurro N.; Laera G.

Titolo volume/Rivista

Science of the total environment

Anno di pubblicazione

2017

ISSN

0048-9697

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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