Technology of Non-Burned Brick Using Heavy Metal Polluted Soil and Solidification of Heavy Metal

2014 ◽  
Vol 955-959 ◽  
pp. 2709-2713 ◽  
Author(s):  
De Wei Dai ◽  
Chun Ping Li ◽  
Li Mei Ren
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Quality Standard ◽  
Polluted Soil ◽  
Residual Fraction ◽  
High Quality ◽  
Water Requirements ◽  
Carbide Slag ◽  
Total Fraction ◽  
High Quality Standard

Ten sets of experiments were designed to process non-burnt bricks by adding different proportion of cement as binder and 10% of carbide slag as activator into heavy metal polluted soil. The results showed that: compressive strength at 3d, 7d and 28d of non-burnt bricks compound by T2 were the highest with 10.552MPa, 19.291 MPa and 20.135 MPa respectively, achieving the high quality standard brick. Besides, leaching concentration of heavy metals were lower than that of GB3838-2002 "environmental quality standard for surface water" in V water requirements; heavy metals Pb, Zn, Cu, Cd mostly exist in the organic and residual fraction with 97.88%90.31%97.44% and 98.92% of the total fraction, respectively.

Applications of Bentonite to Soil Decontamination

2018 ◽  
Vol 69 (7) ◽  
pp. 1695-1698
Author(s):  
Marin Rusanescu ◽  
Carmen Otilia Rusanescu ◽  
Gheorghe Voicu ◽  
Mihaela Begea
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Laboratory Experiments ◽  
Experimental Studies ◽  
Heavy Metal Concentration ◽  
Polluted Soil ◽  
Raw Material ◽  
Soil Decontamination ◽  
Metal Retention ◽  
Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

scholarly journals Remediation of Pb and Cd Polluted Soils with Fulvic Acid

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1608
Author(s):  
Aslihan Esringü ◽  
Metin Turan ◽  
Asli Cangönül
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Fulvic Acid ◽  
Ornamental Plants ◽  
Polluted Soil ◽  
Green Technology ◽  
Zinnia Elegans ◽  
Fresh Weight ◽  
Polluted Soils ◽  
The World

Heavy metal pollution is among the important environmental problems in the world. Many techniques have already been used to remove the heavy metals such as lead (Pb) and cadmium (Cd). Among them, the phytoremediation method is an environmentally friendly and green technology. This study was carried out to determine the efficiency of fulvic acid (FA) application in removing Pb and Cd from polluted soil using Tagetes eracta L. and Zinnia elegans Jacq. ornamental plants. The results indicated that, FA application, number of flower per plants, and plant fresh weight of Tagetes eracta plants and Zinnia elegans plants increased 187.5%, 104.5% and 155.5%, 57.7%, respectively with application of 7000 mg L−1 FA at 100 mg kg−1 Pb pollution condition, whereas 42.85%, 16.5%, and 44.4–36.1% with application of 7000 mg L−1 FA at 30 mg kg±1 Cd pollution condition, respectively. With the FA application in the Zinnia elegans plant, the root part has accumulated 51.53% more Pb than the shoot part. For Cd, the shoot part accumulated 35.33% more Cd than the root. The effect of FA application on superoxide dismutase (SOD), peroxidase (POD) and, catalase (CAT) of the Tagetes eracta were decreased as 32.7%, 33.1%, and 35.1% for Pb, 21.2%, 25.1%, and 26,1%, for Cd, and 15.1%, 22.7%, and 37.7% for Pb, and 7.55%, 18.0%, and 18.8% for Cd were in Zinnia elegans respectively. In conclusion, Tagetes eracta and Zinnia elegans can not be recommended for remediation of Pb and Cd polluted area, but FA can be recommended for Pb and Cd stabilization in polluted soil.

scholarly journals Heavy Metal Tolerance Bacillus spp Isolated From Crude Oil Polluted Soil

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Muibat Fashola
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Crude Oil ◽  
Metal Tolerance ◽  
Heavy Metal Tolerance ◽  
Polluted Soil ◽  
Diffusion Method ◽  
Bacillus Species ◽  
Antibiotics Resistance ◽  
Bacillus Spp

Introduction: Indiscriminate dumping of spent oils enriched with heavy metals has led to increase in heavy metals load in the soil. Heavy metals exert toxic effects on biodegradation of organic pollutant in cocontaminated soil and there is need to find suitable strategies for their removal. Aim: The aim of this study was to assess the heavy metals resistance capability of indigenous Bacillus species in hydrocarbon polluted soil to nickel (Ni), Cadmium (Cd), Lead (Pb) and Chromium (Cr). Materials and Methods: Heavy metal tolerant bacteria were isolated from hydrocarbon polluted soil using Luria-Berthani agar supplemented with the respective metals and spread plate techniques. The isolates were putatively identified on the basis of their colonial morphology and biochemical characteristics and their antibiotics susceptibility pattern were evaluated using disc diffusion method. Results: The maximum tolerable concentration (MTC) of the four heavy metals to the selected isolates was 2 mM. Four bacteria isolates able to withstand the MTC were putatively identified as Bacillus subtilis, Bacillus megaterium, Bacillus laterosporus and Bacillus polymyxa. Out of the four Bacillus species, only B. laterosporus did not show multiple tolerance to the tested antibiotics which show that there is correlation between heavy metal tolerance and antibiotics resistance by the isolates. Conclusion: Multiple heavy metal tolerance Bacillus spp. were isolated from crude oil polluted soil. These bacteria could be suitable agents for bioaugmentation of hydrocarbon polluted soil co-contaminated with heavy metals.

scholarly journals Analisis Kandungan Logam Berat Pada Ikan Kakap Putih (Lates calcarifer Bloch) di Perairan Mimika Papua

2019 ◽  
Vol 17 (2) ◽  
pp. 256
Author(s):  
Rosye H.R. Tanjung ◽  
Suwito Suwito ◽  
Vita Purnamasari ◽  
Suharno Suharno
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Content ◽  
Heavy Metal Contamination ◽  
Sea Water ◽  
Good Condition ◽  
Quality Standard ◽  
Heavy Metal Content ◽  
Lates Calcarifer ◽  
Tailings Sand

Kebutuhan bahan pangan sangat tergantung pada ketersediaanya di lingungan. Bahan pangan yang diperlukan untuk memenuhi kebutuhan sehari-hari harus sehat dan bebas dari bahan pencemar, termasuk logam berat. Ikan kakap putih (Lates calcarifer) sering dijumpai pada kawasan muara sungai di hampir seluruh wilayah Indonesia, bahkan di Papua. Tujuan penelitian ini adalah untuk mengkaji kandungan logam berat Pb, Cd, Cu, Fe, As, dan Hg pada ikan kakap putih (L. calcarifer) yang hidup di perairan estuari Mimika Papua. Perairan estuari di Mimika diketahui sebagai salah satu daerah pengendapan pasir sisa tambang (tailing). Metode yang digunakan adalah survei dan analisis laboratorium kandungan logam berat pada tubuh ikan. Analisis Pb, Cd, Cu, Fe, As, dan Hg ditentukan dengan spektroskopi serapan atom (AAS, Atomic Absorpsion Spectroscopy). Penentuan tingkat pencemaran logam berat dilakukan dengan Metode Standar APHA 3113 Cetac Technologies SPR IDA. Analisis data dilakukan dengan membandingkan kandungan logam berat dalam air dengan baku mutu air laut menurut SK MNLH No. 51 tahun 2004. Untuk kandungan logam berat pada organ tubuh ikan dibandingkan dengan kandungan maksimum logam berat berdasarkan SNI 7387: 2009 tentang batas maksimum cemaran logam berat bahan pangan. Kandungan logam berat pada ikan kakap putih masih tergolong aman dikonsumsi karena mengandung logam berat di bawah ambang batas baku mutu. Kondisi ini didukung oleh hasil analisis logam berat pada air yang menunjukkan masih dalam kondisi baik.   Kata kunci: L. calcarifer, logam berat, Sungai Kamora, Sungai Ajkwa, Mimika.   The need for food depends on the availability in the environment. Foods needed to meet daily needs should be healthy and free of pollutants, including heavy metals. White snapper (Lates calcarifer) is often found in the estuary of the river in almost all parts of Indonesia, even in Papua. The purpose of this research is to study the heavy metal content of Pb, Cd, Cu, Fe, As, and Hg on white snapper (L. calcarifer) which live in Mimika Papua estuary waters. The estuary waters of Mimika are known as one of the deposition areas of tailings sand. The method used is survey and laboratory analysis of heavy metal content in fish body. Analysis of Pb, Cd, Cu, Fe, and Hg was determined by Atomic Absorption Spectroscopy (AAS). Determination of the level of heavy metal contamination was done by Standard Method of APHA 3113 Cetac Technologies SPR IDA. Data analysis was done by comparing the heavy metal content in water with sea water quality standard according to SK MNLH No. 51 year 2004. For heavy metal content in fish body organs compared with maximum content of heavy metals based on SNI 7387: 2009 on the maximum limit of heavy metal food contamination. The content of heavy metals in white snapper is still considered safe for consumption because its below the quality standard threshold. This condition is supported by the results of heavy metal analysis on the water which shows still in good condition. Key words: L. calcarifer, heavy metal, Kamora River, Ajkwa River, Mimika.

scholarly journals Soil Heavy Metal Pollution Around Iron Tailing Areas at Different Using Status

2015 ◽  
Vol 9 (1) ◽  
pp. 113-120
Author(s):  
Fengmin Song ◽  
Xingchang Zhang ◽  
Yanmin Wang ◽  
Chen Li
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Total Concentration ◽  
Potential Ecological Risk ◽  
Residual Fraction ◽  
Large Spatial Scale ◽  
Background Value ◽  
Local Soil

Heavy metal pollution was a dynamic changing process for a long period and on large spatial scale. The heavy metal content in tailing soil varied with time changing. The distribution and cumulative characteristics of heavy metals in different time and surrounding soil caused by ore dressing and smelting activities were different. The aim of this study was to assess the geochemical characteristics and pollution status of heavy metals in soil around 2 iron tailing areas at different using status. Samples were collected around the 2 different iron tailing and sieved through nylon sieves. Metals were measured in digested solutions by a atomic emission spectrometer. The concentration of all heavy metals (Fe, Mn, V, Cu, Ni) in the soil around using M tailing area exceeded local soil background value; however, the content of all metals except Fe in soil around closed W tailing areas were lower than background value. BCR results showed that average exchangeable fraction of Mn in soil around W and M accounted for 11.87%, 11.78% of the total concentration, respectively; average exchangeable and reducible fractions of Ni accounted for 26.97% and 13.59%, respectively; average oxidizable fraction of Cu accounted for 18.6%, 31.63% in soil around W and M, respectively, which were higher than other metals; residual fraction of Fe, V accounted for more than 80% of the total concentration. The results indicate the soil was moderately contaminated by heavy metal around M and unpolluted around W. However, the risk assessment results performed that Mn showed moderate potential ecological risk and other metals showed low potential risk.

KANDUNGAN LOGAM BERAT TIMBAL (PB) DAN KADMIUM (CD) PADA SEDIMEN DI PERAIRAN SUNGAI PAKIL KABUPATEN BANGKA

2018 ◽  
Vol 12 (2) ◽  
pp. 84-92
Author(s):  
Fauzia Miranda ◽  
Kurniawan Kurniawan ◽  
Sudirman Adibrata
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Environmental Protection Agency ◽  
Metal Content ◽  
Quality Standard ◽  
Research Field ◽  
Heavy Metal Content ◽  
Sediment Texture ◽  
Positive Correlation ◽  
R Value

This study aimed to analyze the content of Pb and Cd in sediments in the river Pakil, Bangka, analyze the content of TOC and texture characteristics of sediments and fine sediment menganallisis relationship with heavy metals, as well as analyze the relationship between TOC with heavy metals. The experiment was conducted in April in Pakil River. Sampling in this research field as muchthree stations and three repetitions. Results of measurement of heavy metals in sediment Pb with an average range of 3.96 to 12.26 mg / kg. The measurement results Cd heavy metal content in the sediment with average range <.0004 to 0.53 mg / kg. Pb heavy metal content in the above mentioned stations have not passed the quality standard limits, for heavy metals Cd (Station 1) has passed the quality standard threshold based on the quality standards according to the Swedish Environmental Protection Agency (SEPA, 2000).The results of the correlation between heavy metals Pb with Sediment Texture positive correlation with R ² value of 0.5021, the correlation between the heavy metals Cd in Sediment Texture positive correlation with R² value of 0.7154. Correlation between heavy metals Pb with TOC in sediments positive correlation with R ² value of 0.9764, the correlation between heavy metals Pb with TOC in sediments positive correlation with R² value of 0.9956.

scholarly journals Biosorption and Bioaccumulation Abilities of Actinomycetes/Streptomycetes Isolated from Metal Contaminated Sites

Separations ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 54 ◽  
Author(s):  
Ivana Timková ◽  
Jana Sedláková-Kaduková ◽  
Peter Pristaš
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ion ◽  
Polluted Soil ◽  
Negative Effects ◽  
Wide Range ◽  
Specific Uptake ◽  
High Concentrations ◽  
Further Development ◽  
Soil And Water

Heavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation. Streptomycetes, with their unique growth characteristics, ability to form spores and mycelia, and relatively rapid colonization of substrates, act as suitable agents for bioremediation of metals and organic compounds in polluted soil and water. A variety of mechanisms could be involved in reduction of metals in the environment, e.g., sorption to exopolymers, precipitation, biosorption and bioaccumulation. Studies performed on biosorption and bioaccumulation potential of streptomycetes could be used as a basis for further development in this field. Streptomycetes are of interest because of their ability to survive in environments contaminated by metals through the production of a wide range of metal ion chelators, such as siderophores, which provide protection from the negative effects of heavy metals or specific uptake for specialized metabolic processes. Many strains also have the equally important characteristic of resistance to high concentrations of heavy metals.

scholarly journals Acknowledgment to Reviewers of Clocks & Sleep in 2020

2021 ◽  
Vol 3 (1) ◽  
pp. 179-180
Author(s):  
Keyword(s):  
Peer Review ◽  
Driving Force ◽  
Review Process ◽  
Peer Review Process ◽  
Quality Standard ◽  
High Quality ◽  
High Quality Standard

The peer review process represents the driving force of journal development, with reviewers acting as the gatekeepers who ensure that Clocks & Sleep maintains its high-quality standard of published papers [...]

Evaluation of Heavy Metal Contamination in Limestone Soil from Suzhou Area, Anhui Province, China

2012 ◽  
Vol 549 ◽  
pp. 949-952
Author(s):  
Song Chen
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Geoaccumulation Index ◽  
Quality Standard ◽  
Standard Level ◽  
Metal Element ◽  
Heavy Metal Element ◽  
Heavy Metals Pollution ◽  
Limestone Soil

The heavy metal elements analysis had been carried out for the limestone soils collected from Suzhou area, the degree of heavy metals pollution were evaluated by such methods as enrichment factor and geoaccumulation index, and the correlation and principal analysis of the testing results were studied based on SPSS. The results showed that the heavy metals of the samples can be subdivided into tow type: the Pb、Zn and Cr are below the first quality standard level, the Cu and As are between the first and second level of quality standard, the heavy metal element pollution degree were as follows: Cu>As>Cr>Zn>Pb>V. The V and Zr are controlled by the contamination of the detrital; the Pb, Sr and As are controlled by the source rock (limestone); the third factor contain the Zn, Cu and Al, which showed the effect by agriculture.

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