ON THE POLLUTION WITH ANTIBIOTICS, HEAVY METALS AND CONVENTIONAL INDICATORS IN DIGESTED WASTEWATER FROM LARGE-SCALE PIG FARMS IN JIAXING CITY, CHINA

2016 ◽  
Vol 15 (10) ◽  
pp. 2253-2260 ◽  
Author(s):  
Lvjun Chen ◽  
Rui Liu ◽  
Genrong Wang ◽  
Zhaoxia Ye
Keyword(s):  
Heavy Metals ◽  
Large Scale ◽  
Pig Farms

Heavy Metal Pollution of Farmland Soils Surrounding Large-Scale Pig Farms

2013 ◽  
Vol 781-784 ◽  
pp. 2133-2137
Author(s):  
Qiu Gen Zhang ◽  
Su Qin Wang ◽  
Li An Wei
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Large Scale ◽  
Pollution Index ◽  
Comprehensive Index ◽  
Pig Farms ◽  
Farmland Soils ◽  
Cu And Zn

The seven typical plots were sampled and the contents of As, Cd, Cr, Cu, Ni, Pb and Zn were analyzed in order to investigate the heavy metal pollution of farmland soils surrounding scale pig farms in Nanchang. The heavy metal pollution was evaluated by using single pollution index and comprehensive index methods. The results were addressed that Cd and Pb were the major two pollutants in the farmland soils. The sequence of single pollution index was Cd, Pb, Ni, Cu, Zn, As and Cr. The competitive pollution index was 1.55, and the farmland soils were a slightly polluted grade. The correlation among heavy metals As, Cd, Pb, Cu and Zn were highly significant or significant, but the correlation among Cr, Ni and other heavy metals were not relevant.

scholarly journals Fabrication of Ultrathin MoS2 Nanosheets and Application on Adsorption of Organic Pollutants and Heavy Metals

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 504 ◽  
Author(s):  
Siyi Huang ◽  
Ziyun You ◽  
Yanting Jiang ◽  
Fuxiang Zhang ◽  
Kaiyang Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electrostatic Interactions ◽  
Large Scale ◽  
Layer Structure ◽  
Structural Characteristics ◽  
Hexagonal Phase ◽  
Two Dimensional ◽  
Mos2 Nanosheets ◽  
Hybrid Strategy ◽  
Ultrathin Mos2 Nanosheets

Owing to their peculiar structural characteristics and potential applications in various fields, the ultrathin MoS2 nanosheets, a typical two-dimensional material, have attracted numerous attentions. In this paper, a hybrid strategy with combination of quenching process and liquid-based exfoliation was employed to fabricate the ultrathin MoS2 nanosheets (MoS2 NS). The obtained MoS2 NS still maintained hexagonal phase (2H-MoS2) and exhibited evident thin layer-structure (1–2 layers) with inconspicuous wrinkle. Besides, the MoS2 NS dispersion showed excellent stability (over 60 days) and high concentration (0.65 ± 0.04 mg mL−1). The MoS2 NS dispersion also displayed evident optical properties, with two characteristic peaks at 615 and 670 nm, and could be quantitatively analyzed with the absorbance at 615 nm in the range of 0.01–0.5 mg mL−1. The adsorption experiments showed that the as-prepared MoS2 NS also exhibited remarkable adsorption performance on the dyes (344.8 and 123.5 mg g−1 of qm for methylene blue and methyl orange, respectively) and heavy metals (185.2, 169.5, and 70.4 mg g−1 of qm for Cd2+, Cu2+, and Ag+). During the adsorption, the main adsorption mechanisms involved the synergism of physical hole-filling effects and electrostatic interactions. This work provided an effective way for the large-scale fabrication of the two-dimensional nanosheets of transition metal dichalcogenides (TMDs) by liquid exfoliation.

scholarly journals Estimation of the Concentration of Some Heavy Metals in Groundwater in Rutba City

2021 ◽  
Vol 904 (1) ◽  
pp. 012009
Author(s):  
A W Abd Byty ◽  
M A Gharbi ◽  
A H Assaf
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Large Scale ◽  
Toxic Metal ◽  
Scale Production ◽  
Future Health ◽  
Distribution Maps ◽  
Guideline Values

Abstract Toxic metal pollutants in groundwater should be identified to prevent future health risks. In this paper, the presence of heavy metals in groundwater in the western region of Iraq was investigated. The heavy metals concentrations, including Ni2+, Co2+, Zn2+, Pb2+, Cr3+, Cd2+, As3+ and Hg2+ were explored in twenty selected aquifers near Rutba City and the results were presented as spatial distribution maps. Findings indicate that contamination with the investigated heavy metal ions possesses a serious threat to the study area’s groundwater quality when compared to WHO and IEPA guideline values. Thus, a new approach to remove or adsorb heavy metal ions can be developed for large-scale production and the safe use of these aquifers water. Results revealed that the highest concentrations in mg/L1 of 2.312 in w19, 1.098 in w2, 5.78 in w17, 0.292 in w9, 3.349 in w5, 0.32 in w13, 0.074 in w11 and 5.622 in w1 for Zn2+, Cr3+, As3+, Pb2+, Ni2+, Co2+, Cd2+ and Hg2+ were recorded, respectively.

scholarly journals Scope and future perspectives of phytoremediation

2021 ◽  
Vol 16 (AAEBSSD) ◽  
pp. 77-85
Author(s):  
Sridevi Tallapragada ◽  
Rajesh Lather ◽  
Vandana ◽  
Gurnam Singh
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Genetic Engineering ◽  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Large Scale ◽  
Negative Impact ◽  
Heavy Metal Accumulation ◽  
Plant Growth Promoting Bacteria ◽  
Runoff Water

Phytoremediation is the plant-based technology that has emerged as a novel cost effective and ecofriendly technology in which green plants are used for extraction, sequestration and/or detoxification of the pollutants. Plants possess the natural ability to degrade heavy metals and this property of plants to detoxify contaminants can be used by genetic engineering approach. Currently, the quality of soil and water has degraded considerably due heavy metal accumulation through discharge of industrial, agricultural and domestic waste. Heavy metal pollution is a global concern and a major health threat worldwide. They are toxic, and can damage living organisms even at low concentrations and tend to accumulate in the food chain. The most common heavy metal contaminants are: As, Cd, Cr, Cu, Hg, Pb and Zn. High levels of metals in soil can be phytotoxic, leading to poor plant growth and soil cover due to metal toxicity and can lead to metal mobilization in runoff water and thus have a negative impact on the whole ecosystem. Phytoremediation is a green strategy that uses hyperaccumulator plants and their rhizospheric micro-organisms to stabilize, transfer or degrade pollutants in soil, water and environment. Mechanisms used to remediate contaminated soil includes phytoextraction, phytostabilization, phytotransformation, phytostimulation, phytovolatilization and rhizofiltration. Traditional phytoremediation method presents some limitations regarding their applications at large scale, so the application of genetic engineering approaches such as transgenic transformation, nanoparticles addition and phytoremediation assisted with phytohormones, plant growth-promoting bacteria and Arbuscular mycorrhizal fungi (AMF) inoculation has been applied to ameliorate the efficacy of plants for heavy metals decontamination. In this review, some recent innovative technologies for improving phytoremediation and heavy metals toxicity and their depollution procedures are highlighted.

QUESTIONS ON OPTIMUM DEVELOPMENT OF COMPLEX FOR MULTI-POINT CONTROL AND EVALUATION OF CONTAMINATION OF WATER BASINS POLLUTED BY WASTE WATER OF MINING AND PROCESSING PLANTS

2021 ◽  
pp. 48-54
Author(s):  
B. L. Djafarova
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Natural Water ◽  
Large Scale ◽  
Measuring System ◽  
External Irradiation ◽  
Dissolved Organic Matters ◽  
Processing Plants ◽  
Optimum Type ◽  
Special Limitation

The paper is devoted to questions on optimum development of complex for control and evaluation of contamination of water basins used for collection of industrial waste water. The purpose of the paper is development of scientific-methodical basics for development of measuring system for control and evaluation of contamination of natural water basins with heavy metals using method of attenuation of irradiation of dissolved organic matters excited by external irradiation. The task on optimization of operational regime of measuring complex for control and evaluation of contamination of natural water basins by waste water of large scale point type polluter of environment with heavy metals. The known model of Shtern-Volmer is used as a basis which assumes non-linear relationship between formed complex and fluorescent irradiations attenuation degree. It is noted that potential possibilities of Shtern-Volmers model are used not fully till now. So that in known researches the water objects polluted by several same sources are mainly researched. It is shown that Shtern-Volmer model is also applicable for analysis and estimation of pollution of water basins by single strong polluter that is mining and processing plants. For analysis the suggested special parameter, inversely proportional to concentration of heavy metals in water is used. Integration of this parameter on all possible values of heavy metals concentration and imposition of special limitation condition on the searched for function of dependence of attenuated part of fluorescent irradiation on maximum concentration of heavy metals make it possible to formulate and solve the task on searching of optimum type of this function providing for the optimum regime of operation of the complex.

Heavy metals in top core sediments from the southern Campania shelf (Italy): Hints to define large-scale geochemical backgrounds

2006 ◽  
Vol 22 (1) ◽  
pp. 65-91 ◽  
Author(s):  
Mario Sprovieri ◽  
Simone Sammartino ◽  
Daniela Salvagio Manta ◽  
Ennio Marsella ◽  
Luciana Ferraro
Keyword(s):  
Heavy Metals ◽  
Large Scale ◽  
Core Sediments

scholarly journals Heavy metals in the São Mateus Stream Basin, Peixe River Basin, Paraiba do Sul River Basin, Brazil

2019 ◽  
Vol 14 (3) ◽  
pp. 1 ◽  
Author(s):  
Cézar Henrique Barra Rocha ◽  
Hiago Fernandes Costa ◽  
Leonardo Pimenta Azevedo
Keyword(s):  
Heavy Metals ◽  
Rural Area ◽  
River Basin ◽  
Large Scale ◽  
High Potential ◽  
Industrial Park ◽  
Trophic Chain ◽  
Contamination Index ◽  
Paraíba Do Sul River

Large-scale enterprises with high potential to pollute need to be licensed, properly supervised and monitored during and after their operations to avoid and/or mitigate impacts in their areas of influence. The São Mateus Stream Basin (SMSB), located in rural area of Juiz de Fora (MG), is impacted by several activities, highlighting a deactivated landfill and an industrial park. This study monitored the concentration of heavy metals in the waters of the main tributaries of the SMSB. Strategic points were selected in each sub-basin, before the mouth and meeting of the Bocaina, Salvaterra and São Mateus Streams, measured monthly between January and December 2014 using the Metalyser probe, and applying the Contamination Index (CI). The CI results showed that the enterprises located in this basin, especially the Park Sul and Salvaterra Landfill in the Bocaina and Salvaterra Streams, respectively, are negatively impacting the quality of these waters. Metals such as Hg, Cu, Pb and Zn were the ones that most violated CONAMA Resolution 357/2005, directing management in order to control the sources of these metals, which are cumulative in organisms and damage the whole trophic chain. The inhabitants of this rural area are not served by any water concessionaire and make use of springs and wells below the level of these streams.

scholarly journals Absorption of Hazardous Pollutants by a Medicinal FernBlechnum orientaleL.

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Xiao-min Zhu ◽  
Yuan-wen Kuang ◽  
Dan Xi ◽  
Jiong Li ◽  
Fa-guo Wang
Keyword(s):  
Heavy Metals ◽  
Large Scale ◽  
Translocation Factor ◽  
Polluted Site ◽  
Total Pahs ◽  
Good Ability ◽  
Polycyclic Aromatic ◽  
Unpolluted Site ◽  
Polluted Sites ◽  
Hazardous Pollutants

A Chinese medicinal fernBlechnum orientale(Linn) was separately collected from polluted and unpolluted sites to determine whether it could accumulate hazardous pollutants or not. Metal concentrations (Cu, Zn, Mn, Pb, Cd, Cr, As, and Hg) both in the fronds and roots and polycyclic aromatic hydrocarbons (PAHs) in the fronds of this fern were quantified. At both sites, roots ofB. orientalehad significantly higher heavy metals than the fronds. Concentrations of Pb, As, Hg, Cd, and Cu in the fronds at the polluted site were more than 2, 6, 7, 14, 5, and 13 times of those at the unpolluted site. Translocation factor and bioaccumulation factor implied thatB. orientaledid not have a good ability to transport heavy metals from the roots to the fronds. Total PAHs in the fronds at the polluted site were significantly higher than those at the unpolluted site, indicating the physiological PAHs absorption byB. orientalegrowing at polluted sites. Uptake of pollutants via stomata might be the main reason causing the significant accumulation of hazardous pollutants in the fronds ofB. orientale. Large-scale systematical survey and intensive monitoring on pollutants in this medicinal fern should be necessarily strengthened.

scholarly journals Molecular Serotyping and Resistance of Clinical Strains of Haemophilus (Glaesserella) Parasuis in Chinese Pig Farms From 2016 to 2018.

2021 ◽  
Author(s):  
Jinjin Liu ◽  
Long Guo ◽  
Yi Yuan ◽  
Wenbo Song ◽  
Qianqian Li ◽  
...  
Keyword(s):  
Large Scale ◽  
Clinical Symptoms ◽  
Inhibitory Effect ◽  
Diffusion Method ◽  
Economic Losses ◽  
Clinical Samples ◽  
Peptide Antibiotics ◽  
Disk Diffusion Method ◽  
Positive Role ◽  
Pig Farms

Abstract Haemophilus parasuis (H. parasuis) is the etiological agent of Glässer's disease and brings great economic losses to the pig industry. The goal of our research is to reveal the serotypes of H. parasuis isolated from large-scale pig farms in China from 2016 to 2018. From 2016 to 2018, 8153 H. parasuis field strains were isolated from 14610 clinical samples of sick pigs with clinical symptoms from 26 provinces and cities of China. Among them, 1386 strains were identified as H. parasuis by PCR, and the isolation rate was 9.49%. Through multiplex PCR, we showed that type 5/12 and type 4 strains had the highest separation rate, followed by type 13 and type 14 strains. Using disk diffusion method, we found cephalosporin antibiotics and peptide antibiotics all had good inhibitory effect on H. parasuis. Our conclusion may play a positive role in the prevention and treatment of H. parasuis.

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