Abstract
Pakistan is the fourth largest yarn producer in the world heavily that relies on cotton crop which receives a substantial 62% of all pesticide applications. The present study was conducted to quantify the levels of pesticides such as bifenthrin, spirotetramat, pyriproxyfen, imidacloprid, and diafenthiuron in soil and plants residue at selected cotton fields of Multan District, Pakistan. In addition to pesticides, the assessment of heavy metal concentration was also conducted in order to determine the overall risks that these compounds to both plants and human population. For this analysis, 20 soil samples and 10 plant samples were collected from 10 selected cotton fields. Pesticides and heavy metals in soil and plant samples were analyzed using high-performance liquid chromatography (HPLC) and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), respectively. It was observed that all samples collected from selected fields contained pesticide residue in top soil (0–15 cm). However, no pesticides were detected in the lower soil layer (16–30 cm). In case of heavy metals, the highest concentration of Fe, Pb, and Mn was observed in both soil and plant residue samples. The heavy metals were found in the order of Fe > Mn > Pb > Zn > Cu > Cd in the soil. The total carcinogenic risk values for a few pesticides were found to range from 10−6 to 10−2, indicating that residents of the study area have low to higher chances of developing cancer. A positive correlation was observed among the pesticides (r = 0.18–0.95) as well as in metals related parameters (r = 0.49–0.96), where a weak negative correlation was found among metal to pesticide parameters except Pd where the maximum r value was 0.62. In general, the finding of this study encourages the development and adoption of sustainable agricultural practices that lower the dependence on toxic pesticides and endorse environmentally friendly alternatives.
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Acknowledgements
The authors would like to acknowledge ISES, PMAS Arid Agriculture University, Rawalpindi, and Nuchem (Pvt.) Ltd. Multan, Pakistan for providing lab facilities.
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This work is conducted and supported by Environmental Sciences Laboratory, ISES, PMAS Arid Agriculture University, Rawalpindi.
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AP has prepared the first draft of the article and conducted all experimental work. AK supervised the whole research work and assisted in providing laboratory facilities. The technical and language editing was performed by RN, MA, and SM provided support in experimental planning, proofread the manuscript, and finally edited the draft.
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Parveen, A., Anjum, M., Mahmood, S. et al. Environmental implication and cancer risk assessment of residual pollutants in cotton crop: a case study of Multan District, Pakistan. Environ Monit Assess 195, 1100 (2023). https://doi.org/10.1007/s10661-023-11710-y
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DOI: https://doi.org/10.1007/s10661-023-11710-y