The Experts below are selected from a list of 108468 Experts worldwide ranked by ideXlab platform

Sardar Khan - One of the best experts on this subject based on the ideXlab platform.

  • A comparative study of human health risks via consumption of Food Crops grown on wastewater irrigated soil (Peshawar) and relatively clean water irrigated soil (lower Dir)
    Journal of Hazardous Materials, 2010
    Co-Authors: Mohammad Ishaq, Sardar Khan, I. Ihsanullah, Imtiaz Ahmad, M. Shakirullah
    Abstract:

    Abstract Food Crops irrigated with wastewater are mostly contaminated with heavy metals and considered as a main pathway for human exposure. In this study, soil and Food Crops samples were collected from wastewater irrigated soils, background and relatively less polluted areas. Results of the sequential extraction and total metals concentrations in soils indicated that wastewater irrigation has significantly increased (p ≥ 0.001) the bioavailable and total metal contents in wastewater irrigated soil as compared to background and control soils. Heavy metal concentrations in the Food Crops grown on wastewater irrigated soil were higher than those grown on background and control soils but were found within WHO/FAO permissible limits except for Zn. Health risk index values were less than 1 for both control and wastewater irrigated soils (except Mn). However, the Food Crops such as Brassica rapa, Spinacia oleracae L., Lycopersicum esculantum, Mentha viridis, Coriandum sativum and Lactuca sativa grown on wastewater irrigated soil can pose health risks because of the high concentration of Mn.

  • health risks of heavy metals in contaminated soils and Food Crops irrigated with wastewater in beijing china
    Environmental Pollution, 2008
    Co-Authors: Sardar Khan, Yingjuan Zheng, Youda Huang
    Abstract:

    Abstract Consumption of Food Crops contaminated with heavy metals is a major Food chain route for human exposure. We studied the health risks of heavy metals in contaminated Food Crops irrigated with wastewater. Results indicate that there is a substantial buildup of heavy metals in wastewater-irrigated soils, collected from Beijing, China. Heavy metal concentrations in plants grown in wastewater-irrigated soils were significantly higher (P ≤ 0.001) than in plants grown in the reference soil, and exceeded the permissible limits set by the State Environmental Protection Administration (SEPA) in China and the World Health Organization (WHO). Furthermore, this study highlights that both adults and children consuming Food Crops grown in wastewater-irrigated soils ingest significant amount of the metals studied. However, health risk index values of less than 1 indicate a relative absence of health risks associated with the ingestion of contaminated vegetables.

  • health risks of heavy metals in contaminated soils and Food Crops irrigated with wastewater in beijing china
    Environmental Pollution, 2008
    Co-Authors: Sardar Khan, Yingjuan Zheng, Youda Huang, Qing Cao, Yongguan Zhu
    Abstract:

    Consumption of Food Crops contaminated with heavy metals is a major Food chain route for human exposure. We studied the health risks of heavy metals in contaminated Food Crops irrigated with wastewater. Results indicate that there is a substantial buildup of heavy metals in wastewater-irrigated soils, collected from Beijing, China. Heavy metal concentrations in plants grown in wastewater-irrigated soils were significantly higher (PFood Crops grown in wastewater-irrigated soils ingest significant amount of the metals studied. However, health risk index values of less than 1 indicate a relative absence of health risks associated with the ingestion of contaminated vegetables.

Riffat Naseem Malik - One of the best experts on this subject based on the ideXlab platform.

  • Potential Risk Assessment of Metal Consumption in Food Crops Irrigated with Wastewater
    CLEAN - Soil Air Water, 2014
    Co-Authors: Muhammad Usman Khan, Said Muhammad, Riffat Naseem Malik
    Abstract:

    This study investigates the potential risk assessment via consumption of Food Crops irrigated with wastewater in the districts Sialkot and Gujranwala, Pakistan. For this purpose, samples of water, soil, and Food Crops were collected from the study area. Metals including potassium (K), sodium (Na), calcium (Ca), magnesium (Mg), copper (Cu), cobalt (Co), iron (Fe), and zinc (Zn) were analyzed using flame atomic absorption spectrophotometry. The concentration of Na was found highest in wastewater (WW), followed by Ca, Mg, etc., while lowest for Co. Similarly, in WW irrigated soil (WWIS) the highest concentration was found for Fe and lowest for Co, while other metal fall between these two extremes. Results showed significance (p 

  • human health risk from heavy metal via Food Crops consumption with wastewater irrigation practices in pakistan
    Chemosphere, 2013
    Co-Authors: Riffat Naseem Malik, Said Muhammad
    Abstract:

    The current study was designed to investigate the potential human health risks associated with consumption of Food Crops contaminated with toxic heavy metals. Cadmium (Cd) concentration in surface soils; Cd, lead (Pb) and chromium (Cr) in the irrigation water and Food Crops were above permissible limits. The accumulation factor (AF) was >1 for manganese (Mn) and Pb in different Food Crops. The Health Risk Index (HRI) was >1 for Pb in all Food Crops irrigated with wastewater and tube well water. HRI >1 was also recorded for Cd in all selected vegetables; and for Mn in Spinacia oleracea irrigated with wastewater. All wastewater irrigated samples (soil and Food Crops) exhibited high relative contamination level as compared to samples irrigated with tube well water. Our results emphasized the need for pretreatment of wastewater and routine monitoring in order to avoid contamination of Food Crops from the wastewater irrigation system.

M. Shakirullah - One of the best experts on this subject based on the ideXlab platform.

  • A comparative study of human health risks via consumption of Food Crops grown on wastewater irrigated soil (Peshawar) and relatively clean water irrigated soil (lower Dir)
    Journal of Hazardous Materials, 2010
    Co-Authors: Mohammad Ishaq, Sardar Khan, I. Ihsanullah, Imtiaz Ahmad, M. Shakirullah
    Abstract:

    Abstract Food Crops irrigated with wastewater are mostly contaminated with heavy metals and considered as a main pathway for human exposure. In this study, soil and Food Crops samples were collected from wastewater irrigated soils, background and relatively less polluted areas. Results of the sequential extraction and total metals concentrations in soils indicated that wastewater irrigation has significantly increased (p ≥ 0.001) the bioavailable and total metal contents in wastewater irrigated soil as compared to background and control soils. Heavy metal concentrations in the Food Crops grown on wastewater irrigated soil were higher than those grown on background and control soils but were found within WHO/FAO permissible limits except for Zn. Health risk index values were less than 1 for both control and wastewater irrigated soils (except Mn). However, the Food Crops such as Brassica rapa, Spinacia oleracae L., Lycopersicum esculantum, Mentha viridis, Coriandum sativum and Lactuca sativa grown on wastewater irrigated soil can pose health risks because of the high concentration of Mn.

Said Muhammad - One of the best experts on this subject based on the ideXlab platform.

  • Potentially toxic elements concentrations and human health risk assessment of Food Crops in Bajaur Agency, Pakistan
    Environmental Earth Sciences, 2017
    Co-Authors: Zia Ullah, Alia Naz, Umar Saddique, Abdullah Khan, Wisal Shah, Said Muhammad
    Abstract:

    This study investigates the potentially toxic elements (PTEs) concentrations in various Food Crops along the Bajaur Agency. For this purpose, Food crop samples were collected and analyzed for PTEs including cadmium (Cd), nickel (Ni), chromium (Cr), copper (Cu), cobalt (Co), zinc (Zn) and lead (Pb) by atomic absorption spectrometer (PerkinElmer, AAS-PEA-700). Among the Food Crops, Spinacia oleracea L. showed the highest concentrations for Ni, Cr, Cu, Co and Pb, Brassica juncea (L.) Czern. for Cd, and Zea mays L. for Pb. The concentrations of the Cd, Cr and Ni in Food Crops have surpassed the safe limits set by Food and Agriculture Organization/World Health Organization. Determined PTEs concentrations in Food Crops were evaluated for the risk assessment through single and collectively PTEs and Food crop using the daily intake of metals (DIM) and hazard quotient (HQ). Results revealed that through Food Crops intake the highest values of DIM and HQ were observed for Zn and Cd, respectively. Children showed the highest HQ values, compared to adults for Triticum aestivum L. consumption. High HQ values can cause hazardous health problem in exposed populations; therefore, this study recommends regular monitoring of PTEs concentrations in Food Crops.

  • Potential Risk Assessment of Metal Consumption in Food Crops Irrigated with Wastewater
    CLEAN - Soil Air Water, 2014
    Co-Authors: Muhammad Usman Khan, Said Muhammad, Riffat Naseem Malik
    Abstract:

    This study investigates the potential risk assessment via consumption of Food Crops irrigated with wastewater in the districts Sialkot and Gujranwala, Pakistan. For this purpose, samples of water, soil, and Food Crops were collected from the study area. Metals including potassium (K), sodium (Na), calcium (Ca), magnesium (Mg), copper (Cu), cobalt (Co), iron (Fe), and zinc (Zn) were analyzed using flame atomic absorption spectrophotometry. The concentration of Na was found highest in wastewater (WW), followed by Ca, Mg, etc., while lowest for Co. Similarly, in WW irrigated soil (WWIS) the highest concentration was found for Fe and lowest for Co, while other metal fall between these two extremes. Results showed significance (p 

  • human health risk from heavy metal via Food Crops consumption with wastewater irrigation practices in pakistan
    Chemosphere, 2013
    Co-Authors: Riffat Naseem Malik, Said Muhammad
    Abstract:

    The current study was designed to investigate the potential human health risks associated with consumption of Food Crops contaminated with toxic heavy metals. Cadmium (Cd) concentration in surface soils; Cd, lead (Pb) and chromium (Cr) in the irrigation water and Food Crops were above permissible limits. The accumulation factor (AF) was >1 for manganese (Mn) and Pb in different Food Crops. The Health Risk Index (HRI) was >1 for Pb in all Food Crops irrigated with wastewater and tube well water. HRI >1 was also recorded for Cd in all selected vegetables; and for Mn in Spinacia oleracea irrigated with wastewater. All wastewater irrigated samples (soil and Food Crops) exhibited high relative contamination level as compared to samples irrigated with tube well water. Our results emphasized the need for pretreatment of wastewater and routine monitoring in order to avoid contamination of Food Crops from the wastewater irrigation system.

Grace Carswell - One of the best experts on this subject based on the ideXlab platform.

  • Food Crops as cash Crops the case of colonial kigezi uganda
    Journal of Agrarian Change, 2003
    Co-Authors: Grace Carswell
    Abstract:

    This article examines the case of Kigezi, where colonial efforts to introduce cash Crops such as coffee and tobacco consistently failed. It argues that Kigezi farmers already had cash-earning Crops, which were Food Crops. These were widely produced and traded in the pre-colonial and colonial periods, and the strength and vibrancy of this trade helps to explain the problems the colonial state encountered when it tried to introduce cash Crops. Marketing policies introduced by the colonial state for different cash Crops in Kigezi served only to discourage cash-crop production there, in contrast to Food production.