Tag Archives: Cadmium

Effect of Magnetized Water Irrigation on Some Growth Traits of Sunflower and its Content of Cadmium in Cd-Contaminated Soil

Samir Shamsham(1) and Faten Razouk*(1)

(1). Department of Soil and Land Reclamation, Faculty of Agriculture, AL Baath University, Homs, Syria.

(*Corresponding author: Eng. Faten Razouk. E-Mail: fatenrazouk1979@gmail.com). Received: 20/04/2018                                Accepted: 07/06/2018

Abstract

Phytoextraction technology is one of the most promising methods for reclamation of soils contaminated with heavy metals using plants, and sunflower is one of many plants that is used to reclaim cadmium contaminated soils. In order to test the efficiency of this technique, an experiment was conducted to study some growth indicators (length, fresh weight and dry weight) and the quantity of cadmium absorbed by the sunflower plant, Helianthus annus L. using six concentrations of cadmium (0, 1, 25, 50, 100 and 200) (mg/kg) Cd, and irrigated with two types of water (magnetized water and tap water). As a result, there was a significant increase in cadmium uptake by the plant when irrigated with magnetized water compared with the tap water-irrigated plant at the same concentrations of cadmium contamination to reach a maximum value of 50 mg/kg in the treatment of tap water irrigation, and at concentration 100 mg/kg in the treatment of magnetized water. The results also showed that the positive effect of magnetized water on most of the studied traits at different concentrations of cadmium compared to tap water.

Key words: Cadmium, Magnetized water, Growth indicators.

Full Paper in Arabic: PDF

Ability of Natural Zeolite Ore to Bind Cadmium from Aqueous Solutions

Batool Salameh*(1) and Leila Habib(1)  

 (1). Department of Soil and Water Sciences, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: batoolzaka@gmail.com).

Received: 02/02/2018                                Accepted: 19/06/2018

Abstract

The objective of this study is to characterize natural zeolite ore by the use of X-Ray Diffraction (XRD), and to study the ability of natural zeolite ore to bind cadmium from aqueous solutions. Adsorption factors such as zeolite particles size, initial Cd concentration, shaking time, solution: zeolite ratio and pH  were studied. Adsorption isotherms constructed then by the use of batch adsorption experiments. Langmuir and Freundlich models were used to represent adsorption data. XRD study showed that Analcime and Phillipsite are the main zeolitic minerals, and it contains non zeolitic minerals such as quartz, calcite and smectite minerals. Natural zeolite ore has high ability to remove cadmium from water solutions, and had 28 mg/g as maximum adsorption capacity. Adsorption increased with increasing initial cadmium concentration, shaking time and initial pH degree. pH 4-6 showed best range for adsorption. Adsorption is not affected by zeolite particle size and solution: zeolite ratio. This study was conducted at Soil Chemistry Laboratory during 2016/2017, but XRD study was conducted at the Atomic Energy Commission of Syria.

Key word: Zeolite ore, X ray diffraction, Adsorption, Cadmium.

Full paper in Arabic: PDF

Estimation of Daily Intake of Lead and Cadmium from Chicken Luncheon Meat Consumed in Damascus

Abdulkarim Husen*(1)

(1). Syrian Arab Standardization and Metrology Organization, Damascus, Syria.

(*Corresponding author: Eng. Abdulkarim Husen. E-Mail: ablon80@yahoo.com).

Received: 12/04/ 2015                                     Accepted: 03/07/ 2015

Abstract

The research which was conducted in the laboratories of Syrian Arab Standardization and Metrology Organization (SASMO) aimed to estimate the daily intake of lead (Pb) and cadmium (Cd) for adult person of 70 Kg weight when he consumed 100 g/day of canned chicken luncheon meat of 5 different brands samples, three of them were locally processed (A, B, and C), while two of them were imported (D, and E), and all brands were sold in the markets. The results revealed that lead levels of the samples differed significantly and ranged between 0.351 and 0.73 mg/Kg (p≤0.05). The samples A and E exceeded the permissible limit which is mentioned in the Syrian Standardization and Metrology number (2719) (>0.5 mg/Kg) in 2008. Regarding cadmium levels, it ranged between 9.37 and 15.22 µg/Kg, and all samples were within the permissible limit according to FAO, (1980) (>100 µg/Kg), and according to ECR, (2006) (>50 µg/Kg).  The daily intake (DI) from elements was compared with acceptable daily intake (ADI), which is recommended by Syrian Standardization and Metrology number (575) in 2009 (250 µg/day/person of lead and 70 µg/day/person of cadmium). The results exhibited that the daily intake of lead ranged between 35.1 and 73 µg/day/person, with a contribution percentage ranged between 14.04 and 29.2% of the daily intake, on the other hand cadmium daily intake ranged between 0.937 and 1.522 µg/day/person with a contribution percentage ranged between 1.33 and 2.17% of the daily intake. We conclude that the consumed canned chicken luncheon meat of different studied brands constitutes an important source for lead and cadmium, with the possibility of exceeding the permissible limits for some brands.

Key words: Cadmium, Lead, Accepted daily intake, Chicken luncheon meat.

Full paper in Arabic:

تقدير المدخول اليومي من الرصاص والكادميوم الناتج من استهلاك لحم لانشون الدجاج في مدينة دمشق