ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

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. 

Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh.

2017 ◽  
Vol 1 ◽  
pp. 264
Author(s):  
Md Didarul Islam ◽  
Ashiqur Rahaman ◽  
Fahmida Jannat
Keyword(s):  
Heavy Metals ◽  
Adverse Effect ◽  
The Other ◽  
Nutrient Level ◽  
Dhaka City ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Low Concentration ◽  
Feed Formulation ◽  
Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples.

scholarly journals Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Abate Ayele ◽  
Yakob Godebo Godeto
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Future Research ◽  
Oil Well ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Minimum Concentration

Heavy metals generated mainly through many anthropogenic processes, and some natural processes have been a great environmental challenge and continued to be the concern of many researchers and environmental scientists. This is mainly due to their highest toxicity even at a minimum concentration as they are nonbiodegradable and can persist in the aquatic and terrestrial environments for long periods. Chromium ions, especially hexavalent ions (Cr(VI)) generated through the different industrial process such as tanneries, metallurgical, petroleum, refractory, oil well drilling, electroplating, mining, textile, pulp and paper industries, are among toxic heavy metal ions, which pose toxic effects to human, plants, microorganisms, and aquatic lives. This review work is aimed at biosorption of hexavalent chromium (Cr(VI)) through microbial biomass, mainly bacteria, fungi, and microalgae, factors influencing the biosorption of chromium by microorganisms and the mechanism involved in the remediation process and the functional groups participated in the uptake of toxic Cr(VI) from contaminated environments by biosorbents. The biosorption process is relatively more advantageous over conventional remediation technique as it is rapid, economical, requires minimal preparatory steps, efficient, needs no toxic chemicals, and allows regeneration of biosorbent at the end of the process. Also, the presence of multiple functional groups in microbial cell surfaces and more active binding sites allow easy uptake and binding of a greater number of toxic heavy metal ions from polluted samples. This could be useful in creating new insights into the development and advancement of future technologies for future research on the bioremediation of toxic heavy metals at the industrial scale.

scholarly journals Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh

1970 ◽  
Vol 1 ◽  
pp. 264
Author(s):  
Md Didarul Islam ◽  
Ashiqur Rahaman, Fahmida Jannat
Keyword(s):  
Heavy Metals ◽  
Adverse Effect ◽  
The Other ◽  
Nutrient Level ◽  
Dhaka City ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Low Concentration ◽  
Feed Formulation ◽  
Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet-ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples

Role of Nano-Photocatalysts for Detoxification of Toxic Heavy Metal

2019 ◽  
Vol 16 ◽  
Author(s):  
M. Bilal Tahir ◽  
Abdullah M. Asiri ◽  
M. Faheem Malik ◽  
N. R. Khalid ◽  
T. Iqbal ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Recent Literature ◽  
Environmental Issues ◽  
Aqueous Environment ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Heavy Metal Detoxification ◽  
Green Technique

Background: Nano-photocatalysis through semiconductor-based materials has become an emerging and eye-catching approach for detoxification of hazardous heavy metals in the aqueous environment. Method: In this article, photocatalysis being a green technique along with several other detoxification technologies for toxic heavy metals have been reviewed. Toxic Effects: Further, the adverse effects of heavy metals on human health, agriculture lands, environment, and aquatic system were investigated. Toxic heavy-metals contribute to numerous environmental issues based on their toxicity. Result: Various types of photocatalysts were revised in recent literature for the detoxification of heavy metals. The recycling of photocatalysts may be anticipated as a worthy method for wastewater treatment has also been discussed with recent examples. Conclusion: Moreover, it concludes with efficiency, challenges and new future perspectives for heavy metal detoxification using photocatalysis.

scholarly journals Pengaruh CdCl2 terhadap Produksi Eksopolisakarida dan Daya Hidup Azotobacter

2012 ◽  
Vol 12 (1) ◽  
pp. 34 ◽  
Author(s):  
Reginawanti Hindersah ◽  
Dedeh Hudaya Arief ◽  
Soetijoso Soemitro ◽  
Lukman Gunarto
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Liquid Medium ◽  
Human Health ◽  
Contaminated Soil ◽  
Room Temperature ◽  
Gravimetric Method ◽  
Soil Bioremediation ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal

The contamination of toxic heavy metal Cadmium (Cd) in soils will be endanger the human health because it ismore available comparing to another toxic heavy metals. One method of Cd-contaminated soil bioremediation isusing exopolysachharide-producing bacteria Azotobacter. Exopolysachharides (EPS) can mobilize Cd through theformation of complex Cd-EPS which sequentially can increase the availability of Cd for plants uptake. A laboratoryexperiment has been done to study the EPS production and the viability of six Azotobacter isolates in the liquidculture containing 0.01, 0.1, and 1 mM CdCl2. The bacteria were cultured in liquid medium with and without CdCl2 for72 hours at room temperature. The EPS production was determined by gravimetric method after precipitationusing acetone and centrifugation at 7000 rpm. The result was that all of Azotobacter isolates produce EPS in thepresence of CdCl2. In the culture with 1 mM CdCl2, the density of Azotobacter sp. isolate BS3, LK5, LKM6 increasedsignificantly, and that of isolate LH16 decreased. No significant effect of CdCl2 on the density of isolate BS2 andLH15. This research suggested that some Azotobacter isolates were relatively resistence to the Cd and could bedeveloped as biological agents in Cd-contaminated soil bioremediation.

scholarly journals Metal Concentration In Water, Sediment, and Green Alga Halimeda opuntia (Linnaeus) J.V. Lamouroux from Totok Bay and Blongko Waters, North Sulawesi

2019 ◽  
Vol 7 (1) ◽  
pp. 233
Author(s):  
. Nasprianto ◽  
Desy M.H. Mantiri ◽  
Grevo S Gerung
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Concentration ◽  
Green Alga ◽  
Marine Algae ◽  
Heavy Metal Concentration ◽  
Low Concentration ◽  
Heavy Metal Concentrations ◽  
North Sulawesi ◽  
Water And Sediment

Heavy metals in the water and sediment, in spite of low concentration, will not degrade and even can be absorbed  and biologically accumulated by marine algae. This study was aimed to analyze the heavy metal concentrations in the seawater, sediment, and  Halimeda opuntia in Totok Bay and Blongko waters. Samples were analyzed using  APHA method  and USEPA method in Water Laboratory Nusantara (WLN). Results showed that the heavy metal concentration in Totok Bay waters was  <0.0001 ppm for Cadmium (Cd),  <0.001 ppm for lead (Pb),  <0.005 ppm for Zinc (Zn), and  <0.00005 ppm for mercury (Hg), respectively, while Blongko waters had Cd concentration of <0.0001 ppm, Pb  <0.001 ppm, Zn <0,005 ppm, Hg <0.00005 ppm. Heavy metal concentration in the sediment of Totok Bay was 4.71 ppm for Cd, 10.7 ppm for lead, 58 ppm for Zn, and 2.68 ppm for Hg, respectively, while in Blongko, the heavy metal concentration was 0,03 ppm for Cd,  0.4 ppm for Pb,  <1 ppm for Zn, and <0.05 ppm for Hg, respectively. The heavy metal concentration in H. opuntia of  Totok Bay was 0.18 ppm for Cd,  2.2 ppm for Pb, 5.10 ppm for Zn, 0.74 ppm for Hg, while H. opuntia of Blongko contained 0.02 ppm of Cd,  0.2 ppm of lead,  <0.5 ppm of  Zn, and  0.009 ppm of Hg, respectively.Keywords : Cadmium (Cd); Lead (Pb); Zink (Zn); Mercury (Hg); Halimeda opuntia; Totok Bay; Blongko waters.ABSTRAKLogam berat dalam perairan dan sedimen meskipun memiliki kadar yang relatif rendah namun tidak akan mengalami degradasi bahkan dapat diabsorbsi dan terakumulasi secara biologis oleh alga laut. Tujuan penelitian adalah menganalisis kandungan logam berat dalam air laut, sedimen dan Halimeda opuntia di perairan Teluk Totok dan Perairan Blongko. Analisis sampel mengacu metode APHA, (2012) dan USEPA, (2005) yang dianalisis di Water Laboratory Nusantara (WLN). Hasil analisis konsentrasi logam berat dalam air laut di perairan Teluk Totok yaitu kadmium (Cd) <0,0001 ppm, timbal (Pb) <0,001 ppm, seng (Zn) <0,005 ppm dan merkuri (Hg) <0,00005 ppm sedangkan dari perairan Blongko yaitu konsentrasi kadmium (Cd) <0,0001 ppm, timbal (Pb) <0,001 ppm, seng (Zn) <0,005 ppm dan merkuri (Hg) <0,00005 ppm. Konsentrasi logam berat pada sedimen di perairan Teluk Totok yaitu kadmium (Cd) 4,71 ppm, timbal (Pb) 10,7 ppm, seng (Zn) 58 ppm dan merkuri (Hg) 2,68 ppm dan perairan Blongko dengan konsentrasi kadmium (Cd) 0,03 ppm, timbal (Pb) 0,4 ppm, seng (Zn) <1 ppm dan merkuri (Hg) <0,05 ppm. Sedangkan konsentrasi logam berat pada H. opuntia di perairan Teluk Totok dengan konsentrasi kadmium (Cd) 0,18 ppm, timbal (Pb) 2,2 ppm, seng (Zn) 5,10 ppm dan merkuri (Hg) 0,74 ppm dan perairan Blongko dengan konsentrasi kadmium (Cd) 0,02 ppm, timbal (Pb) 0,2, seng (Zn) <0,5 ppm dan merkuri (Hg) 0,009 ppm.Kata-kata kunci : Kadmium (Cd); Timbal (Pb); Seng (Zn); Merkuri (Hg); Halimeda opuntia; Teluk Totok; Perairan Blongko.

Facile fabrication of silk protein sericin-mediated hierarchical hydroxyapatite-based bio-hybrid architectures: excellent adsorption of toxic heavy metals and hazardous dye from wastewater

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86607-86616 ◽  
Author(s):  
Pradyot Koley ◽  
Makoto Sakurai ◽  
Toshiaki Takei ◽  
Masakazu Aono
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Congo Red ◽  
Heavy Metal Ions ◽  
Silk Protein ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Hybrid Architectures ◽  
Facile Fabrication

Facilely fabricated silk protein sericin-mediated hierarchical hydroxyapatite hybrid architectures show excellent adsorption of toxic heavy metal ions of Pb(ii), Cd(ii) and Hg(ii) and a hazardous dye, Congo red (CR), from wastewater.

Ecological Risk of Heavy Metal in Agricultural Soil and Transfer to Rice Grains

2020 ◽  
Author(s):  
Upoma Mahmud ◽  
Md. Tareq Bin Salam ◽  
Abu Khan ◽  
Md. Mizanur Rahman
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Agricultural Soil ◽  
Risk Index ◽  
Reference Value ◽  
Absorption Spectrometry ◽  
Heavy Metal Concentration ◽  
Rice Grain ◽  
Toxic Heavy Metals ◽  
Soil Extracts

Abstract Higher accumulation of toxic heavy metals in rice grain and agricultural soil may lead to an imbalanced ecosystem. The present study was carried out to assess the risk of different heavy metals nickel, copper, arsenic, lead, and manganese in agricultural soil and transfer status to rice grain. The samples were collected from four agricultural fields at different times in the Dumuria Upazila (sub-district) under Khulna district in Bangladesh. Heavy metal concentration in soil extracts, irrigation water samples, and grain samples was determined by Atomic Absorption Spectrometry (AAS). Average metal concentrations were calculated and compared with the reference value in soil. In most of the cases, the existence of heavy metals in agricultural soil was greater than the reference soil which is a rising concern. Overall risk index (RI) stated that the examined soils were at moderate risk of contamination. Transfer factor (TF) of Arsenic (0.037 to 0.115) and Manganese (0.056 to 0.155) from soil to rice grain were higher that is also a matter of concern. On the other hand, TF of Lead (Pb) was found in a very negligible amount which is a good sign. Regular monitoring of heavy metals in agricultural soil should be initiated and the awareness level should be increased to avoid environmental problems.

Assessment of heavy metal pollution of topsoil in settlement area, Darkhan city

2018 ◽  
pp. 55-65 ◽  
Author(s):  
Sonomdagva Ch ◽  
Chultem Ch ◽  
Byambatseren Ch
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Spatial Distribution ◽  
Enrichment Factor ◽  
Contamination Factor ◽  
Pollution Assessment ◽  
Heavy Metal Concentration ◽  
Average Concentration ◽  
Background Concentration ◽  
Toxic Heavy Metals

This study was carried out to assess the content of toxic heavy metals (As, Co, Cr, Cu, Ni, Pb, V, Zn), determine pollution and spatial distribution of topsoil in Darkhan city which is one of the largest cities in Mongolia, to determine pollution and spatial distribution. The selected study area of Darkhan city was divided into 3 zones (industrial zones, ger districts or livestock breeding zones and private apartments or residential district zones) representing settlement’s characteristics, and 14 points were sampled from topsoil. In order to estimate the level of pollution, the contamination factor, the degree of contamination, pollution load index, and enrichment factor that were formulated by Hakanson, Tomlison, Selvaraj were used in our study. The results were come out by comparing the heavy metal concentration of the topsoil with it`s background concentration. In terms of spatial distribution of heavy metals in the topsoil, heavy metals concentration in ger district and industrial areas is relatively high, but pollution assessment is not very high. As a result of the enrichment factor which was used for assessment of contamination source, the average concentration of 8 elements (As, Co, Cr, Cu, Ni, Pb, V, Zn) at 13 points presented that was derived from natural sources.

INFLUENCE OF THE ECOLOGICAL STATE OF THE SEREPOK RIVER (VIETNAM) ON ACCUMULATION OF HEAVY METALS IN ORGANS OF FISH

2017 ◽  
pp. 98-105
Author(s):  
Ngo The Cuong ◽  
Tran Hoan Quoc ◽  
Svetlana Vasilievna Zolotokopova
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
River Water ◽  
Bottom Sediments ◽  
Heavy Metal Concentration ◽  
Industrial Areas ◽  
Industrial Regions ◽  
Cadmium Lead ◽  
Sarotherodon Galilaeus ◽  
Water Bottom

The article focuses on the study of change of containing heavy metals (zinc, copper, iron, cadmium, lead, arsenic) in the abiotic and biotic components of the Serepok river (Vietman) influenced by wastewater discharge from industrial areas. Heavy metal content was determined in the river water and bottom sediments in the four zones: above and within the boundaries of industrial regions Xoa Phu and Tam Thang and in two water reservoirs situated below the boundaries of those industrial areas. Tilapia Galilean ( Sarotherodon galilaeus ), Hemibagrus ( Hemibagrus ), and sazan ( Cyprinus carpio ) caught in these areas were the hydrobionts under study in which liver, gills, skeleton and muscles accumulation of heavy metals was detected. In the organs of fish caught in the river within industrial region, heavy metals concentration was 3-7 times higher. The greatest concentration of heavy metals was found in the liver and gills of fish caught in the boundaries of industrial regions, the least concentration was in the muscles. In most cases, significant correlation between heavy metal concentration in organs of fishes and in river water, bottom sediments has been revealed.

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