Phytoextraction of Heavy Metals by Various Vegetable Crops Cultivated on Different Textured Soils Irrigated with City Wastewater

A challenging task in urban or suburban agriculture is the sustainability of soil health when utilizing city wastewater, or its dilutes, for growing crops. A two-year field experiment was conducted to evaluate the comparative vegetable transfer factors (VTF) for four effluent-irrigated vegetable crops (brinjal, spinach, cauliflower, and lettuce) grown on six study sites (1 acre each), equally divided into two soil textures (sandy loam and clay loam). Comparisons of the VTF factors showed spinach was a significant and the best phytoextractant, having the highest heavy metal values (Zn = 20.2, Cu = 12.3, Fe = 17.1, Mn = 30.3, Cd = 6.1, Cr = 7.6, Ni = 9.2, and Pb = 6.9), followed by cauliflower and brinjal, while lettuce extracted the lowest heavy metal contents (VTF: lettuce: Zn = 8.9, Cu = 4.2, Fe = 9.6, Mn = 6.6, Cd = 4.7, Cr = 2.9, Ni = 5.5, and Pb = 2.5) in response to the main (site and vegetable) or interactive (site * vegetable) effects. We suggest that, while vegetables irrigated with sewage water may extract toxic heavy metals and remediate soil, seriously hazardous/toxic contents in the vegetables may be a significant source of soil and environmental pollution.

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ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

Recent Research in Science and Technology ◽

10.25081/rrst.2018.10.3370 ◽

1970 ◽

pp. 07-10

Author(s):

MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Heavy Metal Concentration ◽

Coconut Water ◽

Toxic Heavy Metals ◽

High Concentration ◽

Toxic Heavy Metal ◽

Low Concentration ◽

Wet Ashing ◽

Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples.

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Analysis of Heavy Metal in Water used for Irrigation, Soil and Some Vegetables grown around Tin Mine Areas of Heipang District, Barkin-Ladi Local Government of Plateau State

Earthline Journal of Chemical Sciences ◽

10.34198/ejcs.2119.111119 ◽

2019 ◽

pp. 111-119

Author(s):

Agustina Onyebuchi Ijeomah ◽

Rebecca Ngoholve Vesuwe ◽

Bitrus Pam

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Food Safety ◽

Safety Concern ◽

Human Beings ◽

Green Beans ◽

Green Pepper ◽

Transfer Factors ◽

Mining Areas ◽

Plateau State

Vegetables growing in mining areas have become a serious food safety concern because of the high levels of heavy metals always associated with mining. In this study, water used for irrigation, soil, cabbage, green pepper and green beans grown in tin mine areas of Heipang District, Barkin-Ladi LGA of Plateau State were analyzed for lead, cadmium and zinc, using Atomic Absorption Spectrophotometer (AAS). The concentrations of the heavy metals in water, soil, vegetables were all in the order Pb, >> Cd > Zn. In the vegetables, the order was: Pb → cabbage > green beans > green pepper; Cd → green beans > cabbage > green pepper; Zn → cabbage > green pepper = green beans. The transfer factors for all the metals (heavy metal in plant / heavy metal in soil) ranged from 0.95 to 1.48. There were high levels of Pb and Cd in all the vegetables, which may be attributed to the metals in the water used for irrigation. Whilst the concentration of Zn in all the samples were lower than recommended limits, the levels of Pb and Cd in the water, soil and vegetables were higher than the WHO/FEPA standard recommended limits reported for vegetables. The Cd concentrations of the vegetables also exceeded the tolerance thresholds for animals and human beings and therefore consumption of vegetable from the area would endanger the health of the population.

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Heavy metal composition of maize and tomato grown on contaminated soils

Open Agriculture ◽

10.1515/opag-2018-0046 ◽

2018 ◽

Vol 3 (1) ◽

pp. 414-426

Author(s):

A.O. Adekiya ◽

A.P. Oloruntoba ◽

S.O. Ojeniyi ◽

B.S. Ewulo

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Contaminated Soils ◽

Heavy Metal Contamination ◽

Mining Area ◽

Atomic Absorption Spectrophotometry ◽

Toxic Heavy Metals ◽

Mining Site ◽

Solanum Lycopersicum L ◽

Sources Of Pollution

Abstract The study investigated the level of heavy metal contamination in plants {maize (Zea mays) and tomato (Solanum lycopersicum L.)} from thirty soil samples of three locations (Epe, Igun and Ijana) in the Ilesha gold mining area, Osun State, Nigeria. Total concentrations of As, Cd, Co, Cr, Cu, Ni, Pb and Zn were determined using atomic absorption spectrophotometry. Spatial variations were observed for all metals across the locations which was adduced to pH and the clay contents of the soils of each location. The results showed that heavy metals are more concentrated in the areas that are closer to the mining site and the concentrations in soil and plants (maize and tomato) decreased with increasing perpendicular distance from the mining site, indicating that the gold mine was the main sources of pollution. The mean concentrations of heavy metals in plants (tomato and maize) samples were considered to be contaminated as As, Cd and Pb respectively ranged from 0.6 - 2.04 mg kg-1, 0.8 - 5.2 mg kg-1, 0.8 - 3.04 mg kg-1 for tomato and respectively 0.60 - 2.00 mg kg-1, 1.50 - 4.60 mg kg-1 and 0.90 - 2.50 mg kg-1 for maize. These levels exceeded the maximum permissible limits set by FAO/WHO for vegetables. In conclusion, monitoring of crops for toxic heavy metals is essential for food safety in Nigeria.

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Metalliferous content of drinking water and sediments in storage tanks of some schools in Erbil city, Iraq

Italian Journal of Food Safety ◽

10.4081/ijfs.2020.8862 ◽

2020 ◽

Vol 9 (3) ◽

Author(s):

Hawraz Sami Khalid ◽

Hoshyar Saadi Ali ◽

Dhary Almashhadany

Keyword(s):

Heavy Metals ◽

Water Quality ◽

Heavy Metal ◽

Drinking Water ◽

Water Samples ◽

World Health ◽

Storage Tanks ◽

Quality Indices ◽

Toxic Heavy Metals ◽

Water Quality Indices

The present study was conducted to evaluate the quality of drinking water in randomly selected schools in Erbil city, Kurdistan Region, Iraq. The water quality indices such as the Heavy metal Pollution Index (HPI) and Heavy metal Evaluation Index (HEI) were applied to characterize water quality. Eighteen schools were incorporated and sampled for their water storage tanks available to students. Water samples and sediment samples from tanks floor were analyzed by Inductively Coupled Plasma Optical Emission Spectrometer for the determination of twenty-two metal elements. In drinking water samples, all detected metals did not exceed the permissible limits of the World Health Organization. The results of this study showed that the average values of HPI and HEI for As, Cd, Cr, Cu, Fe, Pb, Mn, Ni, and Zn were 54.442 and 0.221, respectively. According to data of the water quality indices, the schools drinking water quality are good and suitable for drinking in terms of heavy metals. However, sediments samples contained high concentrations of all elements including the toxic heavy metals (As, Cd, Cr, and Pb). Re-suspension of sediments into water column after refilling storage tanks can pose a serious threat to students drinking water from such vessels. It is therefore recommended that proper storage tanks are provided to the schools accompanied by continuous sanitation and hygiene practice to mitigate the corrosion of tanks to avoid health risks of toxic metal

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Spatial distribution of heavy metals in surface sediments of Kalametiya Lagoon in southern Sri Lanka; insight towards pollution status and socio-economic interactions

10.21203/rs.3.rs-936004/v1 ◽

2021 ◽

Author(s):

Sunanda Kodikara ◽

Hossein Tiemoory ◽

Mangala Chathura De Silva ◽

Pathmasiri Ranasinghe ◽

Sudarshana Somasiri ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Spatial Distribution ◽

Sri Lanka ◽

Suspended Sediments ◽

Potential Effect ◽

Toxic Heavy Metals ◽

Threshold Effect Level ◽

Effect Level ◽

Economic Interactions

Abstract Heavy metal (HM) pollution has become a serious threat to coastal aquatic ecosystems. This study, therefore, aimed at assessing the spatial distribution of selected heavy metals/metalloids including Arsenic (As), Cadmium (Cd), Chromium (Cr), Lead (Pb), and Mercury (Hg) in surface sediment (0–15 cm) samples collected across Kalametiya Lagoon in southern Sri Lanka. Forty-one (41) grid points of the lagoon were sampled and the sediment samples were analyzed for HM content by using ICP-MS. A questionnaire survey was carried out to investigate the possible sources for HM pollution in Kalametiya Lagoon. Water pH and salinity showed significant variation across the lagoon. Overall mean value of pH and salinity were 6.68 ± 0.17 and 2.9 ± 2.2 PSU respectively. The spatial distribution of the heavy metals was not monotonic and showed a highly spatial variation. The kernel density maps of the measured heavy metals demarcated several different areas of the lagoon. The mean contents of As, Cd, Cr, Hg, and Pb were lower than that of threshold effect level (TEL) however, higher for Hg at the North Inlet. Nevertheless, it was still lower than potential effect level (PEL). Socio-economic interactions have dramatically reduced during the past two decades. Industrial sewage, river suspended sediments and agrochemicals such as fertilizers, pesticides were reportedly identified as the possible sources for heavy metal loads. Accumulation of toxic heavy metals can be minimized by detouring the water inflow to the lagoon.

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Heavy Metals Removal from Water by Efficient Adsorbents

Water ◽

10.3390/w13192659 ◽

2021 ◽

Vol 13 (19) ◽

pp. 2659

Author(s):

Muhammad Zaim Anaqi Zaimee ◽

Mohd Sani Sarjadi ◽

Md Lutfor Rahman

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Water Treatment ◽

Adsorption Process ◽

Natural Occurrence ◽

Toxic Heavy Metals ◽

Major Purpose ◽

Treatment Methods ◽

Metals Removal ◽

Harmful Effects

Natural occurrence and anthropogenic practices contribute to the release of pollutants, specifically heavy metals, in water over the years. Therefore, this leads to a demand of proper water treatment to minimize the harmful effects of the toxic heavy metals in water, so that a supply of clean water can be distributed into the environment or household. This review highlights several water treatment methods that can be used in removing heavy metal from water. Among various treatment methods, the adsorption process is considered as one of the highly effective treatments of heavy metals and the functionalization of adsorbents can fully enhance the adsorption process. Therefore, four classes of adsorbent sources are highlighted: polymeric, natural mineral, industrial by-product, and carbon nanomaterial adsorbent. The major purpose of this review is to gather up-to-date information on research and development on various adsorbents in the treatment of heavy metal from water by emphasizing the adsorption capability, effect of pH, isotherm and kinetic model, removal efficiency and the contact of time of every adsorbent.

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Azolla as Waste Decomposer and Bio-fertilizer: A Review

Journal of Applied Research in Plant Sciences ◽

10.38211/joarps.2020.2.1.14 ◽

2021 ◽

Vol 2 (1) ◽

pp. 108-116

Author(s):

Keyword(s):

Heavy Metals ◽

Organic Matter ◽

Crop Production ◽

Research Work ◽

Soil Health ◽

Active Role ◽

Sewage Water ◽

Aquatic Fern ◽

Beneficial Effects ◽

Cyanobacterium Anabaena

In modern-day agriculture, we are well aware of the utilization of artificial fertilizers in the soil to supply major soil nutrients for plant growth and development. The most common used nutrients in agroecosystem are nitrogen (N), phosphorus (P), potassium (K), and sulfur (S). These fertilizers cause an increase in crop production, but the excess use of these fertilizers has several health hazards for the plants and animals feeding on them. Presently the consumer's preference has been shifted from synthetic fertilizer-based food to organic food. This paper aims to review the results of the research work done in the past few decays on the environment detoxification and beneficial effects of Azolla (aquatic fern) on plants and soil health. Hopefully, it will help the collaborative research on this “green gold” in the future.Azolla fixes the free-living atmospheric N as they have symbiotic Cyanobacterium Anabaena Azolla. Azolla adds organic matter and provides natural mulch to the soil because of these benefits is known as bio-fertilizer. Azolla remediates industrial and sewage water by accumulating heavy metals in their body and plays an active role in the reclamation of salt-affected soil by accumulating heavy metals and salts and by increasing the soil organic matter

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Determination of heavy metals and selenium content in chicken liver at Erbil city, Iraq

Italian Journal of Food Safety ◽

10.4081/ijfs.2020.8659 ◽

2020 ◽

Vol 9 (3) ◽

Author(s):

Hoshyar Saadi Ali ◽

Dhary Alewy Almashhadany ◽

Hawraz Sami Khalid

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Inductively Coupled Plasma ◽

Heavy Metal Contamination ◽

Optical Emission ◽

Critical Issue ◽

Chicken Liver ◽

Poultry Meat ◽

Emission Spectrometry ◽

Toxic Heavy Metals

Heavy metal contamination of poultry meat is a critical issue for human health due to associated risks of cytotoxicity and systemic pathologies after ingestion of such metals. A total of twenty chicken liver samples were collected from markets of Erbil city and analyzed for ten heavy metals contents by Inductively Coupled Plasma Optical Emission Spectrometry. The targeted metals were cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), mercury (Hg), zinc (Zn) and selenium (Se). The average concentrations (mg/kg) of targeted trace elements were 0.06±0.027, 0.06±0.05, 2.05±0.34, 1.85±0.47, 0.15±0.17, and 33.53±5.24 for Co, Cr, Cu, Mn, Ni, and Zn respectively. Copper (Cu) levels significantly exceeded the maximum permissible limit of WHO. Moreover, the average concentrations of toxic heavy metals and selenium were 0.07±0.037, 0.278±0.10, 0.11±0.083, and 2.01±0.454 mg/kg for Cd, Pb, Hg, and Se respectively. Hg and Pb levels exceeded the permissible limits of WHO. Higher levels of Cu and Hg in poultry may pose a serious threat to consumers which demand countermeasures and precautions to be taken. Iraqi Standards Authority and relevant official institutions are strongly recommended to regulate safe disposal of heavy metal waste in the environment to reduce animal exposure to such metals.

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Probiotic Lactobacillus sp. with bioremediation potential of toxic heavy metals

Bangladesh Journal of Microbiology ◽

10.3329/bjm.v34i1.39605 ◽

2018 ◽

Vol 34 (1) ◽

pp. 43-46 ◽

Cited By ~ 2

Author(s):

Sangita Ahmed ◽

Md Rafiqul Islam ◽

Jannatul Ferdousi ◽

Tabassum Samia Iqbal

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Industrial Development ◽

Biochemical Properties ◽

Low Ph ◽

Drug Resistant ◽

Toxic Heavy Metals ◽

Human Gut ◽

Probiotic Lactobacillus ◽

Lactobacillus Spp

Pollution of the environment and food with toxic heavy metals is being intensified in Bangladesh with industrial development. Consumption of foods and water contaminated with heavy metals imposes threat to human health. Aiming to find a solution to this problem, the present study focuses on probiotic Lactobacillus spp. with potential to remove heavy metals from environment as well as human body. A total of three Lactobacillus spp were isolated from curd samples and were identified based on their morphological and biochemical properties. These isolates were tolerant to low pH and bile salt which aids in their application in human gut. All isolates could tolerate 600 ppm chromium, 400 ppm lead, 400 ppm copper and 400 ppm zinc. The heavy metal tolerant Lactobacillus spp were also multi drug resistant and showed 100% resistance to Azithromycin, Cloxacillin, Gentamicin, Vancomycin, Streptomycin, Nalidixic acid, Trimethoprim-Sulfamethoxazole and Penicillin, while 100% sensitivity was observed to Imipenem. Bangladesh J Microbiol, Volume 34 Number 1 June 2017, pp 43-46

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Elemental Profile of Heavy Metals in Garden cress, Coriander, Lettuce and Spinach, Commonly Cultivated in Kahrizak, South of Tehran- Iran

Open Agriculture ◽

10.1515/opag-2018-0004 ◽

2018 ◽

Vol 3 (1) ◽

pp. 32-37 ◽

Cited By ~ 12

Author(s):

Mohammad Kazem Souri ◽

Neda Alipanahi ◽

Mansoure Hatamian ◽

Mohammad Ahmadi ◽

Tsehaye Tesfamariam

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Leaf Tissue ◽

Heavy Metal Concentration ◽

Heavy Metal Accumulation ◽

Vegetable Crops ◽

Garden Cress ◽

Metal Concentrations ◽

Heavy Metal Concentrations

Abstract Heavy metal accumulation in vegetable tissues often poses a great risk for human health. In the present study, accumulation of heavy metal in green leafy vegetable crops of coriander, garden cress, lettuce and spinach were evaluated under waste water irrigation in fields located in Kahrizak, on the southern edge of the metropolitan city of Tehran, Iran. Atomic absorption spectrophotometery was used for determination of heavy metal concentrations in leaf tissue. The results showed that heavy metal concentrations in soil and irrigation water were significantly high than allowable levels. Analysis of plant leaf tissue showed that spinach and garden cress accumulated higher concentrations of heavy metals compared to coriander and lettuce plants. Central leaves of lettuce showed the lowest heavy metal concentration compared to outer leaves or leaves of other vegetable crops, and can be the safer product for fresh consumption. The results indicate that the vegetables produced in the region are not suitable for fresh consumption and the agricultural activities should change towards ornamental or industrial crops production.

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