Impact of sewage contaminated water on soil, vegetables, and underground water of peri-urban Peshawar, Pakistan
- 28 December 2011
- journal article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 184 (10), 6411-6421
- https://doi.org/10.1007/s10661-011-2429-4
Abstract
The use of sewage-contaminated municipal water for irrigation of crops is an old practice in many big cities of Pakistan. Since the wastewater is rich in nutrients, it increases crops yield substantially but at the cost of food quality. The objective of this study was to investigate sewage water irrigation as a source of accumulation of heavy metals in soil and its subsequent transfer to crops and underground water. Sewage water, soil, groundwater, and crop samples were collected from selected areas around Peshawar city and analyzed for heavy metals concentration by atomic absorption spectroscopic method. Analysis of data revealed a considerable impact of the irrigation practices in the peri-urban Peshawar. Statistical analysis of the data showed a positive correlation between heavy metals concentration and soil carbon contents on the one hand and cation exchange capacity on the other. A strongly negative correlation was observed between metal contents and soil pH. The vertical movement of heavy metals from contaminated soil has polluted crops and underground water. The results indicated higher concentration of toxic metals in soil accumulated due to long-term sewage-contaminated water irrigation and their subsequent transfer to our food chain. The practice, if continued un-noticed may pose a threat of phytotoxicity to the local population.Keywords
This publication has 14 references indexed in Scilit:
- Heavy metals from soil and domestic sewage sludge and their transfer to Sorghum plantsEnvironmental Chemistry Letters, 2007
- Heavy‐Metal Concentration of Sewage‐Contaminated Water and Its Impact on Underground Water, Soil, and Crop Plants in Alluvial Soils of Northwestern IndiaCommunications in Soil Science and Plant Analysis, 2007
- Heavy Metal Contents of Vegetables Grown in Soil, Irrigated with Mixtures of Wastewater and Sewage Sludge in Pakistan, using Ultrasonic‐Assisted Pseudo‐digestionJournal of Agronomy and Crop Science, 2007
- Hazardous effects of sewage water on the environmentManagement of Environmental Quality: An International Journal, 2005
- The effect of long-term irrigation using wastewater on heavy metal contents of soils under vegetables in Harare, ZimbabweAgriculture, Ecosystems & Environment, 2005
- Antioxidant response to cadmium in Phragmites australis plantsPlant Physiology and Biochemistry, 2002
- Cadmium and zinc interactions and their transfer in soil-crop system under actual field conditionsScience of The Total Environment, 2002
- Soil and human health: a reviewEuropean Journal of Soil Science, 1997
- Cadmium bioavailability and health risk in foodTrends in Food Science & Technology, 1994
- PHYTOCHELATINSAnnual Review of Biochemistry, 1990