Physical, Chemical Properties Assessment and accumulation of Some Heavy Metals in Sediment of Edku Lake, Egypt

2019 ◽  
Vol 23 (5) ◽  
pp. 461-476
Author(s):  
Alam El-Deen Farouk ◽  
Soha Mahmoud Ahmed
Keyword(s):  
Heavy Metals ◽  
Chemical Properties ◽  
Physical Chemical

Recent advances in the application of noble metal nanoparticles in colorimetric sensors for lead ions

2021 ◽  
Author(s):  
H Singh ◽  
Amy Bamrah ◽  
Sanjeev Kumar ◽  
A Deep ◽  
M Khatri ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Chemical Properties ◽  
Lead Ions ◽  
Noble Metal Nanoparticles ◽  
Physical Chemical ◽  
Recent Advances ◽  
Recent Developments ◽  
Colorimetric Sensors

Recent developments in nanotechnology and engineering have produced a plethora of nanomaterials with amazing physical/chemical properties and enhanced sensing potential for various heavy metals in the environment. Noble metal nanoparticles...

scholarly journals Biofilm Application as Biomonitoring Agent in Heavy Metals Pb2+ and Cr6+ in Ngimboh Coastal, Ujungpangkah, Gresik

2019 ◽  
Vol 7 (2) ◽  
pp. 134
Author(s):  
Agung Riswandi ◽  
Muhammad Mahmudi ◽  
Andi Kurniawan ◽  
Lutfi Nimatus Salamah
Keyword(s):  
Heavy Metals ◽  
Chemical Properties ◽  
Current Speed ◽  
Survey Method ◽  
Sampling Point ◽  
Water Sampling ◽  
Land Area ◽  
Physical Chemical ◽  
Chemical Conditions ◽  
Biomonitoring Agent

<p>Biomonitoring is the use of organisms to monitor and assess/detect the condition of an environment. Ngimboh Coast is a coastal line in Ujungpangkah Subdistrict, East Java (Indonesia) which functions as a vessel berth, TPI, and shipyard industry which has the potential to dispose of waste containing Pb<sup>2+</sup> and Cr<sup>6+</sup> which affect the physical condition of chemicals and organisms in these waters. This study aims to determine the Biofilm can be a biomonitoring agent in heavy metals Pb<sup>2+</sup> and Cr<sup>6+</sup> and to know the physical chemical conditions in the Ngimboh coast, Ujungpangkah District, Gresik. This study uses a survey method. Biofilm, sediment and water sampling was carried out at 3 sampling points, namely the first sampling point area close to the disposal of shipyard industrial waste, the second sampling point was an empty land area, and sampling point three was the estuary area. The parameters were measured such as physical properties (temperature, current speed, water depth), chemical properties (pH, DO, salinity), metal content of Pb<sup>2+</sup> and Cr<sup>6+</sup> on biofilms, sediments and water.</p>

scholarly journals Caracterización física y química de biochar de lodos residuales.

2019 ◽  
Vol 37 (3) ◽  
pp. 243
Author(s):  
Martha Alicia Velázquez Machuca ◽  
Juan Rosario Equihua Soriano ◽  
José Venegas González ◽  
José Luis Montañez Soto ◽  
José Luis Pimentel Equihua ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Organic Contaminants ◽  
Agricultural Soil ◽  
Treatment Plant ◽  
Chemical Properties ◽  
Nutrient Content ◽  
Physical Chemical ◽  
Chemical Conditions ◽  
Scale Reactor

Pyrolysis treatment of sewage sludge to generate biochar is one of the current alternatives for environmental management of this waste. The treatment transforms sewage sludge into biochar, conserves some of the characteristics that give it an important agronomic value and reduces its pathogen content. The objective of this study was to analyze the potential use of the sewage sludge biochar obtained from the wastewater treatment plant (WWTP) of Morelia, Michoacán, México, as an agricultural soil improver considering the physical-chemical properties of the material and its content of nutrients and heavy metals as indicators. The sewage sludge was subjected to pyrolysis (SSB) in an experimental scale reactor that uses solar energy, with six residence times and temperature of 280 to 355 oC. The parameters analyzed were: pH EC, OM, Cu, Mn, Zn, Fe available (DTPA and EDTA), elemental composition (C, N, O, Ca, Mg, Na, K, P, S, Cl, Si, Al, Fe, Mn, Cu, Zn, Ti, Ni, Cr, Cd and Pb). The EC of the SSB obtained was from 592 to 5240 μS cm‑1, pH = 6.33 to 7.02, OM = 3.8 to 5.6%, high contents of C, N, P (31 to 38%, 6.5 to 7.7% and 37.7 to 48.8 g kg‑1, respectively), low Na/Ca ratio and a low content of total and available heavy metals. The properties of the SSB obtained indicate that it can be used as an agricultural soil improver since it is a material with high nutrient content and low environmental risk in terms of its low heavy metal content. These results should be complemented with studies on the response of plants to BLR, monitoring of physical-chemical conditions and analysis of organic contaminants in soil and water where this material is applied.

scholarly journals Evaluasi sifat fisika, kimia dan kandungan logam berat di dalam nata de coco yang dibuat menggunakan sumber nitrogen dari NPK

2021 ◽  
Vol 12 (2) ◽  
pp. 250-256
Author(s):  
Budi Santosa ◽  
Wirawan Wirawan
Keyword(s):  
Heavy Metals ◽  
Chemical Properties ◽  
Nitrogen Sources ◽  
Total Sample ◽  
Fiber Content ◽  
Physical And Chemical Properties ◽  
Physical Chemical ◽  
Physical And Chemical ◽  
Cu And Zn ◽  
And Chemical Properties

Nata de coco one of the beverage products produced from fermented coconut water using the help of starter Acetobacter xylinum. This product is very popular with people ranging from children to parents because the shape and texture resembles a gel.  This study aims to evaluate the physical, chemical and heavy metal content in nata de coco made using nitrogen sources from NPK. The experimental plan used by The Complete Randomized Plan (RAL) is a single factor, the factor is the concentration of NPK consisting of 5 levels of K1 = 0.25%, K2 = 0.5%, K3 = 1%, K4 = 1.5%, K5 = 2%.  Each treatment was repeated 5 times and the total sample observed a total of 25 pieces. The observed observation parameters of nata thickness, nata weight, total fiber content of nata and metal residue content in nata include Cu, Zn, Pb metals, all of which are observed at the end of fermentation (the 14th day of fermentation). The initial parameters of the formation of nata are observed from the beginning of fermentation until the nata sheet is first formed. The results showed that nata de coco made using nitrogen source from NPK concentration of 0.1% has the best physical and chemical properties namely thickness of nata: 1,438 cm, weight of nata: 309 grams, initial formation of nata 3.2 days and total fiber content of nata: 4.024%. The use of NPK produces residues in the form of heavy metals Cu and Zn while pb heavy metals are undetectable. The higher the concentration of NPK given as a source of nitrogen, the higher the residues of heavy metals Cu and Zn in the nata de coco.

Chlorinated Organics in Nearshore Waters and Tributaries of the St. Clair River

1986 ◽  
Vol 21 (3) ◽  
pp. 344-350 ◽  
Author(s):  
Barry G. Oliver ◽  
Klaus L.E. Kaiser
Keyword(s):  
United States ◽  
Suspended Sediment ◽  
Waste Disposal ◽  
Large Volume ◽  
Water Samples ◽  
Chemical Properties ◽  
Low Level ◽  
Chemical Company ◽  
Physical Chemical ◽  
The Individual

Abstract The concent rat ions of hexachloroethane (HCE), hexachlorobutadiene (HCBD), pentachlorobenzene (QCB), hexachlorobenzene (HCB) and octachlorostyrene (OCS) in large volume water samples show that the major sources of these chemicals to the St. Clair River are Dow Chemical Company effluents and, to a lesser degree, Sarnia’s Township ditch which drains one of Dow’s waste disposal sites. Tributaries entering the river on both sides of the Canada/United States border contain measurable concentrations of these chemicals indicating low level contamination throughout the area. The degree of water/suspended sediment partitioning of the chemicals (Kp) was studied. Kp values for the individual chemicals changed in a manner consistent with changes in their physical-chemical properties.

Polymer-Graphene Nanoassemblies and their Applications in Cancer Theranostics

2020 ◽  
Vol 20 (11) ◽  
pp. 1340-1351 ◽  
Author(s):  
Ponnurengam M. Sivakumar ◽  
Matin Islami ◽  
Ali Zarrabi ◽  
Arezoo Khosravi ◽  
Shohreh Peimanfard
Keyword(s):  
Mechanical Stability ◽  
Chemical Properties ◽  
The Other ◽  
Hydrophilic Polymer ◽  
Two Dimensional ◽  
Normal Tissues ◽  
Physical Chemical ◽  
Anti Cancer ◽  
Good Biocompatibility ◽  
Cancer Theranostics

Background and objective: Graphene-based nanomaterials have received increasing attention due to their unique physical-chemical properties including two-dimensional planar structure, large surface area, chemical and mechanical stability, superconductivity and good biocompatibility. On the other hand, graphene-based nanomaterials have been explored as theranostics agents, the combination of therapeutics and diagnostics. In recent years, grafting hydrophilic polymer moieties have been introduced as an efficient approach to improve the properties of graphene-based nanomaterials and obtain new nanoassemblies for cancer therapy. Methods and results: This review would illustrate biodistribution, cellular uptake and toxicity of polymergraphene nanoassemblies and summarize part of successes achieved in cancer treatment using such nanoassemblies. Conclusion: The observations showed successful targeting functionality of the polymer-GO conjugations and demonstrated a reduction of the side effects of anti-cancer drugs for normal tissues.

scholarly journals Chemical Properties of Heavy Metal-Contaminated Soils from a Korean Military Shooting Range: Evaluation of Pb Sources Using Pb Isotope Ratios

2021 ◽  
Vol 11 (15) ◽  
pp. 7099
Author(s):  
Inkyeong Moon ◽  
Honghyun Kim ◽  
Sangjo Jeong ◽  
Hyungjin Choi ◽  
Jungtae Park ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Management Strategies ◽  
Chemical Properties ◽  
Heavy Metal Concentration ◽  
Soil Samples ◽  
Shooting Range ◽  
Geochemical Properties ◽  
Mineral Phases

In this study, the geochemical properties of heavy metal-contaminated soils from a Korean military shooting range were analyzed. The chemical behavior of heavy metals was determined by analyzing the soil pH, heavy metal concentration, mineral composition, and Pb isotopes. In total, 24 soil samples were collected from a Korean military shooting range. The soil samples consist of quartz, albite, microcline, muscovite/illite, kaolinite, chlorite, and calcite. Lead minerals, such as hydrocerussite and anglesite, which are indicative of a transformation into secondary mineral phases, were not observed. All soils were strongly contaminated with Pb with minor concentrations of Cu, Ni, Cd, and Zn. Arsenic was rarely detected. The obtained results are indicated that the soils from the shooting range are contaminated with heavy metals and have evidences of different degree of anthropogenic Pb sources. This study is crucial for the evaluation of heavy metal-contaminated soils in shooting ranges and their environmental effect as well as for the establishment of management strategies for the mitigation of environmental risks.

scholarly journals Shellfish Chitosan Potential in Wine Clarification

2021 ◽  
Vol 11 (10) ◽  
pp. 4417
Author(s):  
Veronica Vendramin ◽  
Gaia Spinato ◽  
Simone Vincenzi
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Allergic Reactions ◽  
Chitin Content ◽  
Deacetylation Degree ◽  
Physical Chemical ◽  
Similar Chemical ◽  
Fungal Chitosan ◽  
Significant Difference ◽  
Fish Industry

Chitosan is a chitin-derived fiber, extracted from the shellfish shells, a by-product of the fish industry, or from fungi grown in bioreactors. In oenology, it is used for the control of Brettanomyces spp., for the prevention of ferric, copper, and protein casse and for clarification. The International Organisation of Vine and Wine established the exclusive utilization of fungal chitosan to avoid the eventuality of allergic reactions. This work focuses on the differences between two chitosan categories, fungal and animal chitosan, characterizing several samples in terms of chitin content and degree of deacetylation. In addition, different acids were used to dissolve chitosans, and their effect on viscosity and on the efficacy in wine clarification were observed. The results demonstrated that even if fungal and animal chitosans shared similar chemical properties (deacetylation degree and chitin content), they showed different viscosity depending on their molecular weight but also on the acid used to dissolve them. A significant difference was discovered on their fining properties, as animal chitosans showed a faster and greater sedimentation compared to the fungal ones, independently from the acid used for their dissolution. This suggests that physical–chemical differences in the molecular structure occur between the two chitosan categories and that this significantly affects their technologic (oenological) properties.

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