Abstract
Study of Some Heavy Metals and Protein in Lettuce (Lactuca sativa )Irrigated with Sewage-Contaminated Water in the First District of N’djamena, Chad
Highlights
1- INTRODUCTION lettuce is one of salad compostae, its scientific name (Lactuca sativa), belongs to the astral or compound species (Asteraceae) .Lettuce (Lactuca sativa) belongs to vegetables that its leaves are eaten fresh, containing many vitamins such as vitamins A, K, C, B, as well as certain minerals such as iron, calcium, magnesium, phosphorus, potassium, as well as fiber (Abdal Rauf et al, 2018)
The average cadmium concentration in lettuce sample irrigated with the river water-mixed with sewage was 33.53 mg/kg, while that irrigated with artesian well water was 24.40 mg/kg
The results of the heavy metal concentrations (Cr+2 Cd+2, Ni+2, As+5) and the plant protein ratio in the lettuce (Lactuca Savtivax) plant sample exceeded the permissible limits of the China Environmental Protection Agency (SEPA, 2005), the Supreme Council for Hygiene of France (CSHPF,2009), The Food and Agriculture Organization (FAO, 2011) and the European Union (EU, 2012)
Summary
1- INTRODUCTION lettuce is one of salad compostae, its scientific name (Lactuca sativa), belongs to the astral or compound species (Asteraceae) .Lettuce (Lactuca sativa) belongs to vegetables that its leaves are eaten fresh, containing many vitamins such as vitamins A, K, C, B, as well as certain minerals such as iron, calcium, magnesium, phosphorus, potassium, as well as fiber (Abdal Rauf et al, 2018). Lactuca sativa lettuce grows in all types of soils and is preferred to be grown in medium-sized soils rich in organic, well-ventilated and drainage materials, with a pH ranging from (5.5-6.6) (Mojahid, 2015). It needs a cold season (climate) influenced by different climate factors. ▸ Contains 94% fiber and a large percentage of water It softens the stomach. as ▸ Its juice helps to activate the stomach and clean the colon
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