Risk and health implications of polluted soils for crop production

Okoronkwo, N. E.; Igwe, J. C.; Onwuchekwa, EC

doi:10.4314/ajfand.v4i13.71825

Cited by 46 publications

(45 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cadmium pollution in water and soil has been a great challenge for a long time, and several suggestions regarding the maximum allowable concentrations have been recommended in the literature [9,14,15]. In addition to these recommendations, some standards have been presented concerning permissible Cd accumulations in various herbs, concentrations in sewage used for irrigation of farm land and human diet.…”

Section: Effect Of Species On Cadmium Accumulationmentioning

confidence: 99%

Response of Vegetables to Cadmium-Enriched Soil

Bakhshayesh

Delkash

Scholz

2014

Water

View full text Add to dashboard Cite

Environmental and water pollution through heavy metals is a growing concern. The recycling of untreated wastewater, which is often contaminated with heavy metals, for agricultural applications is becoming more popular. However, information on the amount of absorption and accumulation of cadmium (Cd) at variable concentrations by different crops is limited. This study aims to analyze the impact of various Cd concentrations (0, 30, 60 and 120 mg/kg) in the root zone on the quantity of its absorption as well as accumulation in various parts of seven different types of common vegetables. The experiments were carried out under laboratory-like controlled conditions. Four treatments and three replicates were selected. Cadmium accumulation exceeded the permissible limits for human consumption, and its accumulation in different plant parts followed this order: Leaves: broccoli > spinach > basil > garlic > carrot > tarragon > dill. Stems: broccoli > spinach > basil > garlic > tarragon > carrot > dill. Roots: broccoli > garlic > basil > spinach > carrot > dill > tarragon. Therefore, the authors recommend the reuse of treated wastewater, which should be virtually free of contaminants such as heavy metals, to irrigate farm lands in the future.

show abstract

Section: Effect Of Species On Cadmium Accumulationmentioning

confidence: 99%

Response of Vegetables to Cadmium-Enriched Soil

Bakhshayesh

Delkash

Scholz

2014

Water

View full text Add to dashboard Cite

show abstract

“…Some heavy metals are bio-accumulative in nature in various plant parts, resulting in poor growth of plants (Girisha and Ragavendra, 2006) and pose great danger to the various elements of the food chain in any given environment. Heavy metals such as copper (Cu), zinc (Zn), manganese (Mn) and iron (Fe) are essential in plant nutrition, however many heavy metals do not play a significant role in the plants physiology (Okoronkwo et al, 2005). Plants cultivated in polluted environments can accumulate these toxic metals at a high concentration causing serious risks to human health when consumed.…”

mentioning

confidence: 99%

“…Plants cultivated in polluted environments can accumulate these toxic metals at a high concentration causing serious risks to human health when consumed. Heavy metals are usually absorbed by plants through their growth media (air, soil, nutrients, to mention a few); plants take up the metals through their roots or foliage (Okoronkwo et al, 2005). The Commission of the European Communities and the Codex Alimentarius Commission (2001) set the Maximum Limit (ML) for Cadmium as 0.2 mg/kg for leafy vegetables and fresh herbs, 0.1 mg/kg for stem and root vegetables and 0.05 mg/kg for the remaining ungrouped vegetables.…”

mentioning

confidence: 99%

Potential human health risk assessment of heavy metals intake via consumption of some leafy vegetables obtained from four market in Lagos Metropolis, Nigeria

Adedokun¹,

Njoku²,

Akinola³

et al. 2016

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

This work investigated six heavy metals (Pb, Cr, Zn, Cd, Ni and Cu) accumulation in five popular leafy vegetables: Telferia occidentalis (fluted pumpkin), Talinum triangulare (waterleaf), Ocimum gratissimum (scent leaves), Celosia argentea (plumed cockscomb), and Amaranthus viridis (slender amaranth) obtained from 4 popular markets in Lagos metropolis using an atomic absorption spectrophotometer (AAS), and evaluate the human health risks of their consumption. Heavy metals content in vegetables across the markets ranged as follow; Cd (0.05 -0.20 mg/kg); Pb (0.34 -5.44 mg/kg), .80 mg/kg), Cr (0.25 -1.51 mg/kg), Ni (0.13 -2.91 mg/kg) and Cu (2.34 -14.08 mg/kg). The concentrations of all metals are quite generally lower than the permissible levels by FAO/WHO in vegetables except for Pb. Statistical analysis of levels of the studied metals in A. viridis, T. occidentalis, C. argentea, and O. gratissimum in all the markets sample showed significant differences in levels of Zn, Cr, Cu and Ni (p<0.05). To assess the the health risk of the inhabitants of Lagos and the environs due to heavy metal intake from these vegetables consumption., the daily intake of metals (DIM), health risk index (HRI), and target hazard quotient (THQ) were calculated. The daily intake of metals in vegetables species for Zn (0.51 -1.46 mg/kg) and Ni (0.05 -0.22 mg/kg) are significantly lower than the recommended daily intake of metals and the upper tolerable daily intake level (UL). However, DIM of Cd (0.004 -0.017 mg/kg) and Pb (0.046 -0.182 mg/kg) exceed the recommended DIM but fall within the upper tolerable daily level. Cr (0.048 -0.082 mg/kg) is lower than the recommended oral reference dose (RFD) of 1.5 mg/kg (USEPA, 2010). The THQ values range showed that Cd was 0.048 -0.192, Pb was 0.150 -0.587, Zn was 0.021 -0.190, Cr was 0.0001 -0.001, Ni was 0.050 -0.120 and Cu was 0.148 -0.239. This result reflected the risk associated with exposure for the period of life expectancy considered, and the inhabitants are highly exposed to health risks associated to these metals in the order Pb > Cu > Cd > Ni > Zn > Cr. The THQ in all metals is less than 1 in all the vegetables species; therefore, it does not pose serious health risk concern. However, vegetable consumption was just one part of food consumption, the potential health risks for residents might actually be higher than in this study when other routes of heavy metals intake are considered. ©JASEM http://dx.doi.org/10.4314/jasem.v20i3.6

show abstract

“…because in environmental research with the purpose of assessment of total elemental concentration, it is necessary to use a broader screen value compared to that needed in mineral exploration [10]. The homogenized samples were passed through 100 mesh nylon screen.…”

Section: Methodsmentioning

confidence: 99%