Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Human Health Risk Assessment Due to Cadmium Accumulation Through Consumption of Chinese Cabbage Grown in Cadmium-contaminated Soil

MA Mahmud
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000

M Hassan
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000

R Hassan
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000

R Mandal
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000

MK Rahman
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000

Abstract/ Executive Summary:

Heavy metal like Cadmium (Cd) is a common pollutant present in the soils of urban and industrial areas. Vegetables are preferably grown in these soils than other crops. Of the vegetables, Chinese cabbage (Brassica campestris var. pekinensis) is gaining its popularity among farmers for its high market value. Therefore, an experiment was conducted where cabbage was grown on Cd treated soil. Bioaccumulation of Cd in Chinese cabbage was determined and Target Hazard Quotient (THQ) model was used to assess potential health risk of human. Results showed that with increasing concentration of added Cd (0.00 to 4.00 ppm) in soil, bio-concentration factors of Cd of Chinese cabbage also increased except at 4 ppm. The chinese cabbage grown in Cd contaminated soils up-to 1.00 ppm might be safe. However, cabbage grown in the soils contaminated with Cd above this level would probably be risky and may cause serious health hazard to human body.

Keywords: Cadmium, Chinese cabbage, THQ model, Bio-concentration factors, Human health risk assessment

Location: Department of Soil Water and Environment, University of Dhaka, Dhaka

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Commodity: Chinese cabbage

Objectives:

The objectives of this study were to evaluate the potential accumulation capacity of Chinese cabbage for Cadmium (Cd.)

Methodology:

A pot experiment was carried out in the net house of the Department of Soil Water and Environment, University of Dhaka. Soil samples (0-20 cm depths) were collected from the field near Bangobondhu Shekh Mujibur Rahman Hall, Jahangirnagar University. Some physico-chemical properties of the soil determined are as follows: pH 6.48 (1:2.5 W/V H₂O), sand 10%, silt 62% and clay 28%, textural class – silty clay loam (Piper 1944), CEC 28.71 me/100g soil, soil colour – red and organic carbon 1.24% (Jackson 1958). Total nitrogen 0.30% (Marr and Cresser 1983), total phosphorus 0.04% (Jackson 1967), potassium 0.24%, sulphur 0.01% (Klute 1986) and cadmium (Wei et al. 2005) – below detection limit. Three kilogram air-dry soil (passed through 3 mm sieve) was used per plastic pot. Treatments used were Control (without Cd), 0.25 ppm Cd/3 kg soil, 0.50 ppm Cd/3kg soil, 1.0 ppm Cd/3kg soil, 1.5 ppm Cd/3 kg soil, 2.0 ppm Cd/3 kg soil, 3.0 ppm Cd/3 kg soil, and 4.0 ppm Cd/3 kg soil. Cadmium Chloride (CdCl₂.2.5H₂O) was applied in the pots as per treatment. Treatment 0.00 ppm stands for unpolluted. Treatment 0.25, 0.50 and 1.00 stands for unpolluted to moderately pollute. Treatment 1.50 and 2.00 ppm stand for moderately polluted and treatment 3.00 ppm stands for moderately to strongly pollute. Lastly, 4.00 ppm stands for strongly polluted (Muller 1969). Eight treatments replicated thrice were arranged in a completely randomized design (CRD). Chinese cabbage seeds were collected from Rajdhani Seed Company, Siddique Bazar, Dhaka. Before sowing, the seeds were sterilized in 2 % (v/v) hydrogen peroxide for 10 minutes, washed several times with distilled water and soaked in water overnight. Five seeds were sown per plot and finally two seedlings were allowed to grow. Seedlings were irrigated with tap water. Intercultural operations, viz. weeding, pesticide application etc., were done as and when needed. Plants were harvested as root and leaf after twelve weeks of growth. Heights were recorded at the time of harvest. Leaf samples were collected and wiped with a piece of white cloth and washed with distilled water. Root samples were washed with tap water and finally with distilled water to remove soil particles. The samples were then dried at 70º C in an oven until completely dry. The dried plant samples were grinded and kept in polyethylene bag for chemical analysis. The leaf sample (0.1 g) was digested with 12 ml solution of concentrated nitric acid (HNO₃) and concentrated per chloric acid (HClO₄) (v/v) (Wei et al. 2005). The concentrations of heavy metals in digest were determined using an atomic absorption spectrophotometer (VARIAN AA240). Data were analyzed with statistical package Minitab 17 and SPSS 20. The differences among treatment were evaluated by one-way ANOVA (p<0.05) according to the Tukey’s multiple range test.

Source of Information: J. Biodivers. Conserv. Bioresour. Manag. 2017, 3(1): 1-8

Article Link (Online Journal): DOI: https://doi.org/10.3329/jbcbm.v3i1.36755

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

However, these heavy metals as per their movement pathways and rate of concentrations cause manifold impacts on depleting bioresources (including humans) through bioaccumulation almost in all ecosystems. This biological process has been occurring in nature very often by the anthropogenic activities.

Knowledge Management: Journal