scholarly journals Evaluation of Heavy Metals Contamination from Environment to Food Matrix by TXRF: The Case of Rice and Rice Husk

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Fabjola Bilo ◽  
Marco Lodolo ◽  
Laura Borgese ◽  
Alberto Bosio ◽  
Laura Benassi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chemical Analysis ◽  
Rice Husk ◽  
Contaminated Soils ◽  
Management Practices ◽  
Rice Samples ◽  
Elemental Chemical Analysis ◽  
First Time ◽  
Established Technique

This paper is devoted to the chemical analysis of contaminated soils of India and the rice grown in the same area. Total reflection X-ray fluorescence spectroscopy is a well-established technique for elemental chemical analysis of environmental samples, and it can be a useful tool to assess food safety. Metals uptake in rice crop grown in soils from different areas was studied. In this work soil, rice husk and rice samples were analyzed after complete solubilization of samples by microwave acid digestion. Heavy metals concentration detected in rice samples decreases in the following order: Mn > Zn > Cu > Ni > Pb > Cr. The metal content in rice husk was higher than in rice. This study suggests, for the first time, a possible role of heavy metals filter played by rice husk. The knowledge of metals sequestration capability of rice husk may promote some new management practices for rice cultivation to preserve it from pollution.

scholarly journals Airborne Precipitation and Cloud Sampling Techniques (Abstract)

1985 ◽  
Vol 7 ◽  
pp. 130 ◽  
Author(s):  
P.I. Joe ◽  
R.S. Schemenauer ◽  
J.W. Strapp ◽  
P. Daum
Keyword(s):  
Chemical Analysis ◽  
Collection Efficiency ◽  
Sampling Location ◽  
Sampling Techniques ◽  
And Performance ◽  
Sampling Procedures ◽  
Flying Attitude ◽  
First Time ◽  
Snow Samples

Techniques have been developed for the airborne bulk sampling of cloud and precipitation, including snow, for later chemical analysis. The techniques include the use of cyclones, meshes, riming rods, scoops and slotted collectors. The role of sampling location on the aircraft, flying attitude, collection efficiency, and sampling procedures for clean samples and mixed clouds with respect to the design and performance of the collectors will be discussed. The polyethylene meshes, with thread diameters of 545 and 345 microns, and the riming rods, with diameter of 1.0 cm, collect supercooled droplets with different efficiencies and can be used to examine the dependence of chemistry on the droplet size. Airborne snow samples were collected for the first time, with the cyclone being the most effective collector.

scholarly journals Assessment of heavy metals and thermal properties of soil‐rice‐husk system collected from three districts of Bangladesh

2018 ◽  
Vol 27 (2) ◽  
pp. 163-173
Author(s):  
Farzana Yasmin ◽  
Rajia Sultana ◽  
Md Zakir Sultan
Keyword(s):  
Heavy Metals ◽  
Thermal Properties ◽  
Rice Husk ◽  
Metal Content ◽  
Acid Digestion ◽  
Thermo Gravimetric ◽  
Thermo Gravimetric Analyzer ◽  
Rice Samples ◽  
Properties Of Soil

This study was conducted to evaluate the contamination of heavy metals and their thermogravimetric properties in the soil-rice-husk system. Heavy metals concentration was determined by Atomic Absorption Spectroscopy (AAS) and thermal property was also analyzed by using Thermo Gravimetric Analyzer (TGA). Metals uptake in rice crop grown in soils of three different areas (Savar, Chapainawabganj and Gazipur) in Bangladesh was studied. Soil, rice husk and rice samples were analyzed after microwave acid digestion. Heavy metals concentration detected in rice samples decreases in the following order as Fe > Mn > Zn > Cu > Ni > Co > Cd > Pb. The metal content in husk was higher than in corresponding rice. Fe concentration was higher than other metals in soil, husk and grain samples. The concentrations of Cd and Pb in the soil were found to be below the detection limit and the order of the other heavy metals as Fe > Mn > Zn > Cu > Ni. The thermal properties of the soil-ricehusk system did not show any significant visible variation during this experiment except for the soil of the Gazipur areas. The residual mass obtained from the TG thermogram helps to make a relation between the quality of soil and the rate of uptake of heavy metals by rice or its husk. Dhaka Univ. J. Biol. Sci. 27(2): 163-173, 2018 (July)

scholarly journals Heavy Metals Mixture Phytotoxic Impact upon Elodea canadensis Macrophite uner the Experimental Ecosystems Conditions

2017 ◽  
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Machine Building ◽  
Elodea Canadensis ◽  
Polluted Water ◽  
Experimental Ecosystems ◽  
Phytotoxic Effect ◽  
First Time ◽  
Upper Boundary

Phytotoxic effect of the heavy metal mixture polluted water has been investigated. The experimental microcosm water contained heavy metals (Zn, Сu, Pb, Cd, Fe+2, Fe+3, Cr+6, Ni). Metal concentrations have been selected to simulate water pollution with machine-building waste (slimes). Such an experiment has been carried out in vitro for the first time. Elodea canadensis macrophite as one of the most adopted and wide-spread species was incubated into the microcosms. No phytotoxic effect was recorded in the microcosms with plants and admixture of heavy metals over the first three days. The death of plants was detected 168 hours (7 days) after the start of incubation. Microcosms with plants without adding of the metals did not alter after the start of incubation. On the second day after incubation and orange sediment precipitated in the microcosms without macrophytes but with the heavy metals adding. The investigation results supplement the vision concerning polyfunctional role of hydrocoles in the elements migration within aquatic ecosystems. The obtained data indicated the prospective and promising character of further research of Elodea canadensis in terms of phytomefitation and search for the upper boundary of tolerance to heavy metals.

scholarly journals BIOAVAILABLE FORMS OF HEAVY METALS FROM RICE SAMPLES AND ITS POTENTIAL HEALTH RISK ASSESSMENT

2021 ◽  
Vol 9 (1) ◽  
pp. 25-35
Author(s):  
Periyasamy Dhevagi ◽  
◽  
Ambikapathi Ramya ◽  
Murugaiyan Sindhuja ◽  
Sengottiyan Priyatharshini ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Heavy Metal ◽  
Health Risk ◽  
Metal Concentration ◽  
Contaminated Soils ◽  
Food Crops ◽  
Metal Analysis ◽  
Rice Samples

Food crops grown in contaminated soils have a greater accumulation of heavy metals and the consumption of food crops grown in the contaminated soils are the source of metals that enters into the human body. Rice being a major food crop, the presence of heavy metals should be monitored regularly for reducing health risk. The analysis of total heavy metal always overestimates the content which leads to misinterpretation of results; however, bioaccessible heavy metal analysis projects the actual health risk. Hence, the present study aims to assess the bioavailable form of heavy metals in rice. The rice samples were collected from 20 different places and used for the inherent and bioavailable metal estimation. In vitro simulated digestion method was applied for bioaccessible metal analysis. Metal concentration in polished rice ranged from 0.10 to 0.82, 0.10 to 1.07, 0.11 to 0.56 and 0.23 to 1.09 mg kg-1 for Lead (Pb), Nickel (Ni), Cadmium (Cd) and Chromium (Cr), respectively. Twenty five percent of the samples recorded less than 0.028, 0.01, 0.01, and 0.03 mg kg-1 of bioaccessible Pb, Ni, Cd, and Cr, respectively. A significant negative correlation was observed between total metal concentration and bioaccessibility percentage. Targeted Hazard Quotient (THQ) of all the metals were less than one for adults indicating that there were no health risks, which undoubtedly reveals the importance of bioaccessible metal analysis. Hence, regular monitoring of heavy metals is essential to reduce the intensive accumulation in the human food chain. Also, the present study has opened up a wide scope on human health risk assessment using an in vitro digestion model.

scholarly journals Research of Heavy Metals on the Agricultural Land in Bajgora Region, Kosovo

2018 ◽  
Vol 26 (1) ◽  
pp. 105-122 ◽  
Author(s):  
Mensur Kelmendi ◽  
Milaim Sadiku ◽  
Sadija Kadriu ◽  
Florent Dobroshi ◽  
Liridona Igrishta ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Environmental Pollution ◽  
Contaminated Soils ◽  
Agricultural Land ◽  
Industrial Wastes ◽  
Mining District ◽  
Industrial Sites ◽  
World Class ◽  
First Time ◽  
The City

Abstract For the first time, a survey about agricultural land focusing on the partitioning of the Pb, Cd, and Zn to the rural part of Mitrovica in northern Kosovo was made. Kosovo’s Mitrovica is one of the main industrial sites in the former Yugoslavia and a world-class mining district in Europe. The process of obtaining metals dates since 1927. From this year until 2000, the technological process of acquisition/obtaining has been accompanied by environmental pollution by creating waste landfills. These landfills are located on the outskirts of the city of Mitrovica at a distance from 1 to 4 km. In this area high levels of heavy metals in air, water, and earth were noticed. Therefore, these metal residues have a particular impact on air, earth, water, and effects on plants, animals and humans health. This situation became alarming; therefore in 2000 the production process was discontinued. During the period from 2000 to the present day, there is noticed a change of nature. Residents of the area have begun to work on agricultural lands without realizing the potential risk coming up. Despite the stagnation of industrial production, environmental pollution continues even further, especially from the landfill generated by industrial wastes. Widespread and very visible contamination mainly from Pb, Zn, Cd were found on the ground, with the highest concentrations measured near the Zveçan smelter. A significant amount of Cd, Pb, and Zn in contaminated soils/ground was quite movable/changeable, suggesting that these elements may be readily available for plants and soil/ground organisms. The main objective of this work is to address this pollution and take measures for education and information.

ENVIRONMENTAL ASSESSMENT OF SOILS IN THE NEPEINO SOLID MUNICIPAL WASTE LANDFILL AREA (DMITROVSKY MUNICIPAL DISTRICT)

2020 ◽  
pp. 36-43
Author(s):  
E.A. Starostin ◽  
I.A. Kirpichev ◽  
O.A. Makarov
Keyword(s):  
Heavy Metals ◽  
Soil Pollution ◽  
Environmental Assessment ◽  
Contaminated Soils ◽  
Pollution Index ◽  
Municipal Waste ◽  
Waste Landfill ◽  
Solid Municipal Waste ◽  
First Time ◽  
Heavy Metals In Soils

The work presents the results of the study of soil pollution in the area of the solid municipal waste landfill «Nepeino». According to the results of the study carried out for the first time within this territory, for the presence of heavy metals in soils, it was found that the concentrations of pollutants are extremely low and do not exceed MPC, and the calculated index ZC (Total Pollution Index) indicates the presence of non-contaminated soils.

scholarly journals The role of Fe- and Mn-oxides during EDTA-enhanced phytoextraction of heavy metals

2008 ◽  
Vol 53 (No. 5) ◽  
pp. 216-224 ◽  
Author(s):  
M. Komárek ◽  
P. Tlustoš ◽  
J. Száková ◽  
V. Chrastný ◽  
J. Balík
Keyword(s):  
Heavy Metals ◽  
Contaminated Soils ◽  
Ethylenediaminetetraacetic Acid ◽  
Limiting Factor ◽  
Incubation Experiments ◽  
Fe And Mn ◽  
Speciation Modelling ◽  
Mn Oxides ◽  
Enhanced Phytoextraction

In several cases ethylenediaminetetraacetic acid (EDTA) proved to be an efficient mobilising amendment during chemically enhanced phytoextraction of heavy metals. The presence of Fe-(hydr)oxides and their dissolution after the addition of EDTA can limit the phytoextraction of the targeted heavy metals due to the high stability of the formed Fe(III)EDTA complexes. This study has focused on the influence of Fe- and Mn-oxides and hydroxides dissolution on heavy metal uptake by <i>Zea mays</i> in a two-year EDTA-enhanced phytoextraction process. Incubation experiments and speciation modelling proved the increased concentrations of Mn and Fe through the dissolution of Mn-and Fe-(hydr)oxides. Furthermore, increased Fe and Mn accumulation was observed in maize plants after the second year of the phytoextraction process. Therefore, the presence of Mn- and especially Fe-(hydr)oxides proved to be a limiting factor during EDTA-enhanced phytoextraction of heavy metals from contaminated soils.

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