Toxic heavy metals content in different agrochemicals available in markets of Bangladesh and their loads to the agricultural lands.

Autor: Aktaruzzaman M; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Zakir HM; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh. zakirhm.ac.bau@gmail.com., Quadir QF; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Rashid MH; Department of Agronomy, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Mallick S; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Biswas P; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Nayeem SMMR; Laboratory of Plant Nutrition and Environmental Chemistry, Department of Agricultural Chemistry, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2024 Oct 15; Vol. 196 (11), pp. 1053. Date of Electronic Publication: 2024 Oct 15.
DOI: 10.1007/s10661-024-13212-x
Abstrakt: A study was conducted to determine the concentration of toxic heavy metals in various agrochemicals available in Bangladesh and to assess the burden of these metals on agricultural soils. An atomic absorption spectrophotometer (AAS) was used to measure the content of 4 toxic metals (Cd, Pb, Cr, and Ni) in the aqueous extract of various agrochemicals. There were significant differences in the amounts of Cd, Pb, Cr, and Ni in different brands of insecticides (mean < 0.01, 3.16, 17.32, and 47.33 µgg -1 ), fungicides (mean 12.42, 10.19, 9.63, and 243.34 µgg -1 ), phosphatic fertilizers (mean 25.43, < 0.01, 206.33, and 210.69 µgg -1 ), micronutrient fertilizers (mean 0.68, < 0.01, 43.43, and 65.79 µgg -1 ), and plant hormones (mean < 0.01, < 0.01, 9.90, and 43.08 µgg -1 ). The concentrations of Cd and Ni were on an average higher in phosphatic fertilizers, which exceeded the maximum acceptable limit of fertilizers in Bangladesh by 2.5 and 4.2 times, respectively. The study also revealed that the burden of toxic heavy metals from agrochemicals on farm soils was in the following order: phosphatic fertilizers > fungicides > micronutrient fertilizers > plant hormones > insecticides. Among the toxic heavy metals, Ni posed the highest burden on Bangladeshi farm soils due to a single application of different agrochemicals in a year. The average total burden of each metal in the soils of Bangladesh showed a decreasing trend in the order of Ni > Cr > Cd > Pb, resulting in a total metal burden of 22.88 g year -1  ha -1 . Finally, the study recommended that certification about the content of metals be made mandatory for agrochemical manufacturing firms to ensure that their products entering in Bangladeshi markets are free from toxic metals.
(© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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