Effects of heavy metals on bacterial community structures in two lead–zinc tailings situated in northwestern China

2021 ◽  
Vol 204 (1) ◽  
Author(s):  
Haijuan Li ◽  
Yuanyuan Shen ◽  
Yueqing He ◽  
Tianpeng Gao ◽  
Guangwen Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Bacterial Community ◽  
Northwestern China ◽  
Community Structures ◽  
Lead Zinc

Pollution retention capabilities of roadside soils

1999 ◽  
Vol 39 (2) ◽  
pp. 201-208 ◽  
Author(s):  
C. Dierkes ◽  
W. F. Geiger
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Drinking Water ◽  
Groundwater Recharge ◽  
Drinking Water Quality ◽  
Traffic Density ◽  
Roadside Soils ◽  
Highway Runoff ◽  
Lead And Cadmium ◽  
Lead Zinc

Runoff from highways contains significant loads of heavy metals and hydrocarbons. According to German regulations, it should be infiltrated over embankments to support groundwater-recharge. To investigate the decontaminating effect of greened embankments, soil-monoliths from highways with high traffic densities were taken. Soils were analyzed to characterize the contamination in relation to distance and depth for lead, zinc, copper, cadmium, PAH and MOTH. Lysimeters were charged in the field and laboratory with highway runoff to study the effluents under defined conditions. Concentrations of pollutants in roadside soils depend on the age of embankments and traffic density. Highest concentrations were found in the upper 5 cm of the soil and within a distance of up to two metres from the street. Concentrations of most pollutants decreased rapidly with depth and distance. Lead and cadmium could not be detected in lysimeter effluent. Zinc and copper were found in concentrations that did not exceed drinking water quality limits.

scholarly journals Microbial Population Changes during Bioremediation of an Experimental Oil Spill

1999 ◽  
Vol 65 (8) ◽  
pp. 3566-3574 ◽  
Author(s):  
Sarah J. MacNaughton ◽  
John R. Stephen ◽  
Albert D. Venosa ◽  
Gregory A. Davis ◽  
Yun-Juan Chang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Bacterial Community ◽  
Oil Spill ◽  
Phospholipid Fatty Acid ◽  
Community Structures ◽  
Gram Negative ◽  
Dgge Analysis ◽  
16S Rdna Pcr ◽  
Microbial Community Structures ◽  
Plfa Analysis

ABSTRACT Three crude oil bioremediation techniques were applied in a randomized block field experiment simulating a coastal oil spill. Four treatments (no oil control, oil alone, oil plus nutrients, and oil plus nutrients plus an indigenous inoculum) were applied. In situ microbial community structures were monitored by phospholipid fatty acid (PLFA) analysis and 16S rDNA PCR-denaturing gradient gel electrophoresis (DGGE) to (i) identify the bacterial community members responsible for the decontamination of the site and (ii) define an end point for the removal of the hydrocarbon substrate. The results of PLFA analysis demonstrated a community shift in all plots from primarily eukaryotic biomass to gram-negative bacterial biomass with time. PLFA profiles from the oiled plots suggested increased gram-negative biomass and adaptation to metabolic stress compared to unoiled controls. DGGE analysis of untreated control plots revealed a simple, dynamic dominant population structure throughout the experiment. This banding pattern disappeared in all oiled plots, indicating that the structure and diversity of the dominant bacterial community changed substantially. No consistent differences were detected between nutrient-amended and indigenous inoculum-treated plots, but both differed from the oil-only plots. Prominent bands were excised for sequence analysis and indicated that oil treatment encouraged the growth of gram-negative microorganisms within the α-proteobacteria andFlexibacter-Cytophaga-Bacteroides phylum. α-Proteobacteria were never detected in unoiled controls. PLFA analysis indicated that by week 14 the microbial community structures of the oiled plots were becoming similar to those of the unoiled controls from the same time point, but DGGE analysis suggested that major differences in the bacterial communities remained.

The distribution of lead, zinc, and chromium in fractions of bottom sediments in the Narew River and its tributaries

2008 ◽  
Vol 37 (4) ◽  
Author(s):  
Mirosław Skorbiłowicz ◽  
Elżbieta Skorbiłowicz
Keyword(s):  
Heavy Metals ◽  
Grain Size ◽  
Bottom Sediment ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Bottom Sediments ◽  
Catchment Area ◽  
Sediment Pollution ◽  
Lead Zinc

The distribution of lead, zinc, and chromium in fractions of bottom sediments in the Narew River and its tributariesThe purpose of the paper was to evaluate the distribution of lead, zinc and chromium contents in different grain fractions of bottom sediments in the Narew River and some of its tributaries. This study also aimed to determine which fractions are mostly responsible for bottom sediment pollution. The studies of the Narew and its tributaries (the Supraśl, Narewka, and Orlanka) were conducted in September 2005 in the upper Narew catchment area. The analyzed bottom sediments differed regarding grain size distribution. The studies revealed the influence of the percentage of particular grain fractions present on the accumulation of heavy metals in all bottom sediments.

scholarly journals Co-occurrence Network Reveals the Higher Fragmentation of the Bacterial Community in Kaidu River Than Its Tributaries in Northwestern China

2018 ◽  
Vol 33 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Yang Hu ◽  
Chengrong Bai ◽  
Jian Cai ◽  
Jiangyu Dai ◽  
Keqiang Shao ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Northwestern China ◽  
Kaidu River

ASSESSMENT OF THE DEPENDENCE OF THE AVERAGE LIFE EXPECTANCY OF THE POPULATION RESIDING IN THE TULA REGION IN THE AREAS WITH A HIGH CONTENT OF HEA VYMETALS IN THE SOIL

2021 ◽  
Vol 1 (1) ◽  
pp. 53-63
Author(s):  
KHROMUSHIN V.A. ◽  
◽  
VOLKOV A.V. ◽  
KHADARTSEV A.A. ◽  
◽  
...  
Keyword(s):  
Heavy Metals ◽  
Life Expectancy ◽  
Respiratory Diseases ◽  
Causes Of Death ◽  
Algebraic Model ◽  
Constructive Logic ◽  
Average Life ◽  
Average Life Expectancy ◽  
Lead Zinc ◽  
Regional Mortality

The article presents the relevance of the problem, defines the research purpose: to compare the average life expectancy of the population in the areas of the Tula region with different contents of heavy metals in the class of causes of death “Respiratory diseases ”. The authors used the data of the regional mortality register, the results of analyzes of the content of heavy metals (copper, lead, zinc, nickel) in the soil by atomic absorption spectroscopy, and the calculation of the average life expectancy by the algebraic model of constructive logic. The results indicate a decrease in average life expectancy due to the presence of heavy metals in the soil, but the average life expectancy in both contaminated and non-contaminated areas is gradually increasing.

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