CHAPTER 12. Heavy Metals in Tannery Wastewater and Sludge: Environmental Concerns and Future Challenges

2014 ◽  
pp. 249-260 ◽  
Author(s):  
Giusy Lofrano ◽  
Maurizio Carotenuto ◽  
Ravindra Kumar Gautam ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Heavy Metals ◽  
Tannery Wastewater ◽  
Environmental Concerns ◽  
Future Challenges

scholarly journals Immobilized Thiosalicylic Ligand System Potentials for the Detoxification of Some Heavy Metals from Tannery Wastewater

2021 ◽  
Vol 9 (3) ◽  
pp. 72
Author(s):  
Bulus Habila ◽  
Emmanuel Chidiebere Ezeh ◽  
Simon Moses Saidu ◽  
John Chidozie Attah ◽  
Paul Okechukwu Nsude ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Tannery Wastewater ◽  
Ligand System

Heavy Metal Contamination and Environmental Concerns on Orchard at Abandoned Tungsten Mine, Southern China

2013 ◽  
Vol 295-298 ◽  
pp. 1609-1614 ◽  
Author(s):  
Wen Jie Lin ◽  
Chu Lian Chen ◽  
Su Biao Xu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal Contamination ◽  
Ph Value ◽  
Southern China ◽  
Stream Water ◽  
Environmental Concerns ◽  
Ph Values ◽  
Tungsten Mine ◽  
Acid Waste ◽  
High Electric Conductivity

A series of stream water, soil and fruits samples in the orchards were collected from Lianhuashan tungsten area in Guangdong Province. The concentrations of As, Cd, Pb, Zn, Cu and Ni in the samples were determined. This study targeted at the impacts of Lianhuashan wasteland on the orchards at the downstream. The results showed that the stream water was severely polluted by heavy metals, especially As and Cd, with low pH value and high electric conductivity (EC). Compared to the background orchards, the soils in the orchards at the downstream were polluted by As and Cd. The fruits in the orchards surrounding the polluted stream were seriously polluted by As and Cd. Acid waste water derived from the tailings of Lianhuashan tungsten mine entered the streams and resulted in elevated concentrations of heavy metals, lower pH values and higher EC in the stream water. The polluted streams caused soils and fruits pollution by As and Cd in the surrounding orchards.

scholarly journals Characterization of tannery wastewater and its treatment by aquatic macrophytes and algae

2015 ◽  
Vol 49 (4) ◽  
pp. 233-242 ◽  
Author(s):  
MAA Jahan ◽  
N Akhtar ◽  
NMS Khan ◽  
CK Roy ◽  
R Islam ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aquatic Plants ◽  
Biological Treatment ◽  
Oxygen Demand ◽  
Tannery Wastewater ◽  
Toxic Substances ◽  
Physiochemical Parameters ◽  
Combination Treatments ◽  
Removal Of Heavy Metals ◽  
Total Dissolved Solid

Tannery wastewater contains large amount of chemical compounds including toxic substances. So an attempt was made to characterize physiochemical parameters of tannery wastewater and investigate the efficacy, and applicability of the biological treatment utilizing aquatic plants macrophytes and algae. Total suspended solids TSS and total Dissolved solid in the original wastewater were found 1250 mg/l and 21300 mg/l respectively. The pH and temperature were 8.3 and 29°C. Dissolved Oxygen (DO), Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) were 2.72 mg/l, 4464 mg/l and 12840 mg/l respectively. Electrical conductivity (EC) was 42500 ?S/cm anions PO43- and Cl- were 17.1 mg/l and 13.8 mg/l respectively. Heavy metals were also analysed. Fe, Na, Zn, Cr, Pb and Ca were found 14.675 mg/l, 12006 mg/l, 1.5241 mg/l, 10.348 mg/l, 0.1818 mg/l and 0.4112 mg/l respectively. Biological treatment with aquatic plants, algae and their combination treatments were found to be effective for the reduction of some physiochemical parameters. Treatment conducted with Eichhornia crassipes was found most effective in reducing COD, EC, TDS and TSS. Mixed treatment resulted reduction of pH from 8.3 to 6.21. Both macrophytes and algae exhibited good heavy metal uptake tendency, but Eichhornia crassips was identified as most effective for the removal of heavy metals in the wastewater because of its extensive root system which provides to help the uptake of pollutants from the wastewater. DOI: http://dx.doi.org/10.3329/bjsir.v49i4.22626 Bangladesh J. Sci. Ind. Res. 49(4), 233-242, 2014

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