Trees as environmental sensors monitoring long-term heavy metal contamination of Spokane River, Idaho

1975 ◽  
Vol 9 (7) ◽  
pp. 638-642 ◽  
Author(s):  
John C. Sheppard ◽  
William H. Funk
2019 ◽  
Vol 86 ◽  
pp. 23-32 ◽  
Author(s):  
Paola Manduca ◽  
Nabil Al Baraquni ◽  
Loai Al Baraquni ◽  
Dania Abu Abadi ◽  
Hanady Abdallah ◽  
...  

2021 ◽  
Vol 9 (2) ◽  
pp. 362 ◽  
Author(s):  
Wen-Jing Gong ◽  
Zi-Fan Niu ◽  
Xing-Run Wang ◽  
He-Ping Zhao

The effects of long-term heavy metal contamination on the soil biological processes and soil microbial communities were investigated in a typical electroplating site in Zhangjiakou, China. It was found that the soil of the electroplating plant at Zhangjiakou were heavily polluted by Cr, Cr (VI), Ni, Cu, and Zn, with concentrations ranged from 112.8 to 9727.2, 0 to 1083.3, 15.6 to 58.4, 10.8 to 510.0 and 69.6 to 631.6 mg/kg, respectively. Soil urease and phosphatase activities were significantly inhibited by the heavy metal contamination, while the microbial biomass carbon content and the bacterial community richness were much lower compared to noncontaminated samples, suggesting that the long-term heavy metal contamination had a severe negative effect on soil microorganisms. Differently, soil dehydrogenase was promoted in the presence of Chromate compared to noncontaminated samples. This might be due to the enrichment of Sphingomonadaceae, which have been proven to be able to secrete dehydrogenase. The high-throughput sequencing of the 16S rRNA gene documented that Proteobacteria, Actinobacteria, and Chloroflexi were the dominant bacterial phyla in the contaminated soil. The Spearman correlation analysis showed the Methylobacillus, Muribaculaceae, and Sphingomonadaceae were able to tolerate high concentrations of Cr, Cr (VI), Cu, and Zn, indicating their potential in soil remediation.


2007 ◽  
Vol 186 (1-4) ◽  
pp. 233-254 ◽  
Author(s):  
A. M. Abdel-Azeem ◽  
T. S. Abdel-Moneim ◽  
M. E. Ibrahim ◽  
M. A. A. Hassan ◽  
M. Y. Saleh

Author(s):  
V.A. Shevchenko ◽  
◽  
A.M. Solovyov ◽  
N.P. Popova

The influence of the long-term use of organic fertilizers of pig breeding complexes in the form of a solid fraction of manure (60...80 t/ha) and liquid effluents (100...120 m3/ha), as well as the mineral fertilizer system N85P40K90 on the dynamics of the content of heavy metals in the arable layer of previously developed unproductive reclaimed lands is considered.


2007 ◽  
Vol 376 (1-3) ◽  
pp. 128-133 ◽  
Author(s):  
Carla Cristina Marques ◽  
Alejandro Sánchez-Chardi ◽  
Sofia Isabel Gabriel ◽  
Jacint Nadal ◽  
Ana Maria Viegas-Crespo ◽  
...  

Author(s):  
Peng CHEN ◽  
Hong-Yan WANG ◽  
Rui-Lun ZHENG ◽  
Bo ZHANG ◽  
Guo-Xin SUN

ABSTRACTHeavy metal contamination in the paddy soils of China is a serious concern because of its health risk through transfer in food chains. A field experiment was conducted in 2014–2015 to investigate the long-term effects of different biochar amendments on cadmium (Cd) and arsenic (As) immobilisation in a contaminated paddy field in southern China. Two types of biochar, a rice-straw-derived biochar (RB) and a coconut-by-product-derived biochar (CB), were amended separately to determine their impacts on rice yield and their efficacy in reducing Cd and As in rice. The two-year field experiment showed that biochar amendments significantly improved the rice yields and that CB is superior to RB, especially in the first growth season. Using a large amount of biochar amendment (22.5tha–1) significantly increased soil pH and total organic carbon, and concomitantly decreased the Cd content in rice grains over the four growth seasons, regardless of biochar type and application rate. Arsenic levels in rice were similar to the control, and results from this study suggest that there was a sustainable effect of biochar on Cd sequestration in soil and reduction of Cd accumulation in rice for at least two years. Biochar amendment in soil could be considered as a sustainable, reliable and cost-effective option to remediate heavy metal contamination in paddy fields for long periods.


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