Chemical Species of Metallic Elements in the Aquatic Environment of anEx‐Mining Catchment

Abstract

This study was conducted to investigate the chemical speciation of dissolved and particulate elements (lead, zinc, copper, chromium, arsenic, and tin) in the mining wastewater of a former tin mining catchment. The speciation patterns of dissolved elements were estimated by an adsorptive stripping voltammeter (ASV), while particulate elements were analyzed by using a newly developed sequential-extraction leaching procedure. The procedure has been operationally defined among five host fractions, namely exchangeable, carbonate, reducible, organic bound, and residual fractions. A total of six elements (lead, zinc, copper, chromium, arsenic, and tin) were analyzed in thirty samples at ten locations (P1-P10), with three samples taken from each of the ten locations, to get the average value from the former tin-mining catchment. The results showed that the heavy metal pollutions in locations P4 and P8 were more severe than in other sampling sites, especially tin and lead pollution. In the water samples from locations P4 and P8, both the total contents and the most dangerous non-residual fractions of tin and lead were extremely high. More than 90% of the total concentrations of arsenic and chromium existed in the residual fraction. Concentrations of copper and zinc mainly occurred in the residual fraction (more than 60%), while lead and tin presented mostly in the non-residual fractions in surface water. For all of the six dissolved elements, the less-labile species formed the predominant fraction in their speciation patterns. The speciation patterns of particulate elements showed that most of the concentrations of zinc, copper, chromium, and arsenic were found in the reducible fraction; whereas lead and tin were mainly associated with the organic fraction. Water Environ. Res., 86, 717 (2014).

Assessment of Environmental Pollution and its Impact on Water Resources, Soils and Crops in the Area Adjacent Bahr El-Bakr Drain, East-Delta, Egypt

“…Furthermore, species of the genus Streptococcus cause pneumonia, ear infection and meningitis. Like fecal coli bacteria, fecal streptococci are applied as indicators of water pollution and have been used for many years to determine the quality and safety of water for irrigation and human consumption (WHO, 1989, Ashraf, 2014.…”

Application of the SWAT Model for Water Components Separation in Iran

“…Incited by looking for an answer to these critical questions, on the one hand, and in order to achieve the objectives of study, on the other, Ashraf et al (2014) selected three dissimilar catchments within the Rhine basin. Their size was in range of 100-500 km 2 .…”

Adsorption characterizations of biosorbent extracted from waste activated sludge for Pb(II) and Zn(II)

“…Since heavy metals are used in various industries due to their technological importance, wastewater from these industries contains metal ions having a permanent toxic effect [1][2][3]. Lead (Pb 2+ ) and zinc (Zn 2+ ) are common metal ions found in many industrial wastewaters.…”