Standards and Regulations Regarding Metals and Their Compounds in Environmental Materials, Drinking Water, Food, Feeding‐stuff, Consumer Products, and Other Materials

Begerow, Jutta; Crößmann, Gerd; Ewers, U.; Finck, Markus

doi:10.1002/9783527619634.ch61

Cited by 1 publication

(2 citation statements)

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“…Cadmium concentrations are considered unsafe for human consumption if they exceed 0.2 mg kg −1 FW or 1.3 mg kg −1 DW limit (WHO 1993). Moreover, Ewers (1991) and Begerow et al (2008) reported stricter limits (0.1 mg kg −1 FW or 0.7 mg kg −1 DW) as the MPL for tomato fruits. It is interesting to note that there is no European guideline present on MPL for Zn in food products.…”

Section: Food and Fodder Safety Aspectsmentioning

confidence: 97%

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Metal uptake of tomato and alfalfa plants as affected by water source, salinity, and Cd and Zn levels under greenhouse conditions

Gharaibeh

Marschner

Heinze

2015

Environ Sci Pollut Res

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Irrigation with wastewater is a promising option to improve crop yields and to reduce pressure on freshwater sources. However, heavy metal concentrations in wastewater may cause health concerns. A greenhouse pot experiment was conducted in order to determine cadmium (Cd) and zinc (Zn) concentrations in sandy soil and plant tissues of tomato (Lycopersicon esculentum L.) and alfalfa (Medicago sativa L.). A 2 × 2 × 4 × 2 factorial treatment arrangement was utilized. Two water sources, fresh (FW) or treated wastewater (TWW), at two salinity levels (1 and 3 dS m(-1)) containing different levels of Cd and Zn were used. Samples were collected after a 90-day growth period. It was observed that the growth of both plants was depressed at the highest metal level (L3). Metal accumulation in plant parts increased with the increase of metal concentration and salinity in irrigation water. At low salinity, water source was the main factor which controlled metal accumulation, whereas, at high salinity, chloride appeared to be the principal factor controlling metal uptake regardless of water source. Metal translocation from roots to shoots increased in TWW-irrigated plants, even in the controls. Tomatoes accumulated Cd up to and above critical levels safe for human consumption, even though Cd concentration in irrigation water did not exceed the current recommended values. Therefore, food production in sandy soils may well pose a health hazard when irrigated with TWW containing heavy metals. Complexation with dissolved organic compounds (DOC) in TWW may be to be the principal factor responsible for increased metal uptake and transfer at low salinity, thereby increasing the risk of heavy metal contamination of food and forage crops.

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Section: Food and Fodder Safety Aspectsmentioning

confidence: 97%

“…In the L3 treatments, these values were exceeded, but due to the severe yield reductions, this is of no practical concern. For Zn, no regulatory limits exist; however, the observed Zn concentrations of 200-500 mg kg −1 are of no concern in animal feed (Ewers 1991;Begerow et al 2008). …”

Section: Food and Fodder Safety Aspectsmentioning

confidence: 99%

Metal uptake of tomato and alfalfa plants as affected by water source, salinity, and Cd and Zn levels under greenhouse conditions

Gharaibeh

Marschner

Heinze

2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

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Standards and Regulations Regarding Metals and Their Compounds in Environmental Materials, Drinking Water, Food, Feeding‐stuff, Consumer Products, and Other Materials

Abstract: Elements and their Compounds in the Environment. 2nd Edition. Edited by E. Merian, M. Anke, M. Ihnat, M. Stoeppler

Cited by 1 publication

References 2 publications

Metal uptake of tomato and alfalfa plants as affected by water source, salinity, and Cd and Zn levels under greenhouse conditions

Metal uptake of tomato and alfalfa plants as affected by water source, salinity, and Cd and Zn levels under greenhouse conditions

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