scholarly journals Absorption and speciation of arsenic by microalgae under arsenic-copper Co-exposure

2021 ◽  
Vol 213 ◽  
pp. 112024
Author(s):  
Zhongqing Huang ◽  
Bingyu Chen ◽  
Jing Zhang ◽  
Changliang Yang ◽  
Jie Wang ◽  
...  
Keyword(s):  
Arsenic Copper

scholarly journals Assessment of content and chemical forms of arsenic, copper, lead, and chromium in sewage sludge compost as affected by various bulking agents

2020 ◽  
Vol 43 (1) ◽  
pp. 56-66
Author(s):  
Mahboub Saffari ◽  
Vahid Reza Saffari ◽  
Hojatollah Khabazzadeh ◽  
Hormazd Naghavi
Keyword(s):  
Sewage Sludge ◽  
Total Concentration ◽  
Bulking Agents ◽  
Chemical Forms ◽  
Organic Fraction ◽  
Specific Kind ◽  
Composting Process ◽  
Mobility Factor ◽  
Arsenic Copper ◽  
Different Levels

AbstractIn current study, the effect of various organic substances as bulking agents (BAs) including wheat straw, pistachio hull wastes, and tree leaves at different levels (10, 25, 45% v/v) were investigated on total concentration and chemical forms of Cu, Pb, Cr, and As in sewage sludge (SS) compost prepared by windrow method. According to the results, the composting process (with/without BAs), due to losses of SS mass and volume, increased the total concentration of heavy metals (HMs) compared to the un-composted SS sample (RSS). Evaluation of HMs chemical forms in prepared compost sample without BAs application (CSS) showed that the composting process reduced the mobility factor of As (from 28% to 20%), Pb (from 11.6% to 9.3%), and Cr (from 14.5% to 9.2%) compared to the RSS. Application of three BAs considerably decreased the mobility factor of As (17.5-18.8%), Pb (4.8-7.9%), and Cr (1.4-6.8%) compared to CSS and RSS. Changes of Cu mobility in prepared compost samples showed an unclear trend, however in some treatments, due to transferred organic fraction into exchangeable and carbonate fractions, increasing of this factor was obvious. Generally, the composting appeared to reduce As, Pb, and Cr availability by stabilizing the three metals and making them more stable and less mobile. In addition, the BAs application effect on HMs behavior of SS compost samples were so different and no specific kind of BAs can be recommended as a superior BAs in SS composting process.

Comparison of Bioleaching High Arsenic-Bearing Copper Sulphide Concentrate Using Thiobacillus Ferrooxidans and Sulfobacillus Thermosulfidooxidans

2012 ◽  
Vol 524-527 ◽  
pp. 1997-2003
Author(s):  
Hai Yun Xie ◽  
Zhuo Yue Lan ◽  
Shu Ming He ◽  
Li Kun Gao ◽  
Xiong Tong
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Arsenic Sulfide ◽  
High Concentration ◽  
Initial Concentration ◽  
Copper Concentrate ◽  
Leaching Process ◽  
Sulfobacillus Thermosulfidooxidans ◽  
Moderate Thermophile ◽  
Arsenic Copper ◽  
High Arsenic

The usage of high-arsenic sulfide copper concentrate were limited because the arsenic in the concentrate harms the qualities of copper product and pollutes the environment. In this paper an innovative process for high-arsenic copper sulfide concentrate with with bio-oxidation respectively Thiobacillus ferrooxidans and moderate thermophile Sulfobacillus thermosulfidooxidans has been studied out, and the influencing factors have been comparative studied during the leaching process, such as concentration particle size, leaching methods, pulp concentration, leaching time and the initial concentration of Fe3+, etc. Under the suitable leaching conditions, the experiments results show that the concentrate is leached 47.13% of Cu,50.09% of As and 52.46% of Fe by Thiobacillus ferrooxidans and 82.39% of Cu,78.21% of As and 40.38% of Fe by moderate thermophile Sulfobacillus thermosulfidooxidans. The high concentration initial Fe3+ has speeded leaching process up in the presence of moderate thermophile Sulfobacillus thermosulfidooxidans, and when the pulp initial concentration of Fe3+ is in the range of 0.08~0.32mol/L, the leaching rate of Cu is 86.34~97.06%, As 89.22~94.13%. It is concluded that Sulfobacillus thermosulfidooxidans have a better effect on bioleaching high-arsenic sulfide copper concentrate than Thiobacillus ferrooxidans.

scholarly journals Arsenic, copper and zinc in marine sediments from the proximity of the brazilian­antarctic base, Admiralty Bay, King George Island, ­Antartica

2010 ◽  
pp. 137-140 ◽  
Author(s):  
Andreza Portella Ribeiro ◽  
Rubens César Lopes Figueira ◽  
César de Castro Martins ◽  
Charles Roberto de Almeida Silva ◽  
Elvis Joacir de França ◽  
...  
Keyword(s):  
Marine Sediments ◽  
King George Island ◽  
Admiralty Bay ◽  
Copper And Zinc ◽  
Arsenic Copper

Market Basket and Duplicate Portion Estimation of Dietary Intakes of Cadmium, Mercury, Arsenic, Copper, Manganese, and Zinc by Japanese Adults

1995 ◽  
Vol 78 (6) ◽  
pp. 1363-1368 ◽  
Author(s):  
Taizo Tsuda ◽  
Tomohiro Inoue ◽  
Mihoko Kojima ◽  
Shigeru Aoki
Keyword(s):  
World Health ◽  
Dietary Intakes ◽  
Market Basket ◽  
Japanese Adults ◽  
Copper Manganese ◽  
Duplicate Portion ◽  
Arsenic Copper ◽  
Health Organization ◽  
Daily Intakes ◽  
Agricultural Organization

Abstract Daily intakes of selected metals from meals in Shiga Prefecture (Japan) were investigated by the duplicate portion method and market basket method. In 1991 and 1992, daily intakes of metals by women, determined by the duplicate portion method, were, respectively, 37 and 27 μg for Cd, 4.3 and 3.5 μg for Hg, 260 and 210 μg for As, 1200 and 1200 (ig for Cu, 4700 and 3600 (ig for Mn, and 8000 and 7200 μg for Zn. Those determined by the market basket method were, respectively, 32 and 35 μg for Cd, 4.3 and 9.9 μg for Hg, 160 and 280 μg for As, 1100 and 980 μg for Cu, 3600 and 4700 μg for Mn, and 8700 and 8500 fig for Zn. No wide differences between the 2 methods were found, except for Hg data in 1992. Daily intakes of Cd and Hg in Shiga Prefecture were lower than the provisional tolerable daily intakes of 57-72 μg for Cd and 43 μg for Hg, proposed by the Food and Agricultural Organization and the World Health Organization.

scholarly journals Use of Spilopelia senegalensis as a Biomonitor of Heavy Metal Contamination from Mining Activities in Riyadh (Saudi Arabia)

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1046 ◽  
Author(s):  
Ahmed M. Almalki ◽  
Jamaan Ajarem ◽  
Ahmed A. Allam ◽  
Hamed A. El-Serehy ◽  
Saleh N. Maodaa ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Human Health ◽  
Heavy Metal Contamination ◽  
Tissue Injury ◽  
Health Concern ◽  
Mining Activities ◽  
Mining Site ◽  
Liver And Kidney ◽  
Copper Zinc ◽  
Arsenic Copper

Environmental pollution with heavy metals (HMs) is of serious ecological and public health concern worldwide. Mining is one of the main sources of HMs and can impact the environment, species diversity, and human health. This study assessed the value of Spilopelia senegalensis as a biomonitor of environmental contamination with metal(loid)s caused by mining activities. S. senegalensis was collected from a gold mining site and a reference site, and metal(loid)s and biochemical parameters were determined. Lead, cadmium, mercury, vanadium, arsenic, copper, zinc, and iron were significantly increased in the liver, kidney, and lung of S. senegalensis from the mining site. Serum transaminases, alkaline phosphatase, creatinine, and urea were significantly elevated in S. senegalensis from the mining site. Lipid peroxidation and nitric oxide were increased, whereas glutathione and antioxidant enzymes were diminished in the liver and kidney of S. senegalensis from the mining site. In addition, multiple histological alterations were observed in the liver, kidney, and lung of S. senegalensis. In conclusion, mining activities provoke the accumulation of metal(loid)s, oxidative stress, and tissue injury in S. senegalensis. Therefore, S. senegalensis is a valuable biomonitor of environmental pollution caused by mining activities and could be utilized in epidemiological avian studies of human health.

Extractability of Arsenic, Copper, and Lead in Soils of a Mining and Agricultural Zone in Central Chile

2004 ◽  
Vol 35 (11-12) ◽  
pp. 1615-1634 ◽  
Author(s):  
Inés Ahumada ◽  
Paula Escudero ◽  
Loreto Ascar ◽  
Jorge Mendoza ◽  
Pablo Richter
Keyword(s):  
Central Chile ◽  
Arsenic Copper

scholarly journals Contaminants Leaching from Fresh Poultry Waste: A Lysimeter Study on Sandy Soils under Tropical Conditions

2017 ◽  
Vol 6 (1) ◽  
pp. 38
Author(s):  
Peter Aderemi Adeoye ◽  
Hasfalina Che Man ◽  
Mohd. Soom Amin Soom ◽  
Ahmad Mohamed Thamer ◽  
Akinbile Christopher Oluwakunmi
Keyword(s):  
Heavy Metals ◽  
Poultry Manure ◽  
Shallow Groundwater ◽  
Experimental Period ◽  
Total Coliform ◽  
Land Application ◽  
Soil Core ◽  
Sample Collection ◽  
Tropical Conditions ◽  
Arsenic Copper

A lysimeter study was conducted on sandy soil of Minna, North central Nigeria to assess the migration of nitrates, phosphates, bacteriological parameters and heavy metals contents of poultry manure through Minna soil. This is with a view to examining the environmental effect of indiscriminate land application of excessive poultry manure on shallow groundwater quality. A lysimeter and rainfall simulator assembly was installed on an undisturbed 0.9m diameter, 3m depth soil core after which 50kg of characterized poultry manure was applied at the top. Rainfall of 125mm was simulated and water samples were collected at different depths of the soil core through the lysimeter and were taken to laboratory for analysis. Results showed that nitrate and phosphate in poultry manure were able to leach to a depth of 2.5m of the soil core four months after poultry manure application while turbidity and electrical conductivity reached their maximum value at depth 2.5m after three months. Faecal coliform, total coliform and faecal streptococci were detected at depth 2.5m also two months after the application. Statistical analysis using New Duncan Multiple Range test showed significant variation (p<0.05) of all the parameters tested with depth of sample collection and months after application of poultry manure. Spearman’s correlation coefficient established both positive and negative correlation between the parameters studied in this research. Heavy metals tested, Arsenic, copper, zinc, chromium and manganese were not able to leach beyond 0.5m depth of the soil core throughout the experimental period.

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