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A zirconium hydroxide coprecipitation method for the determination of As, Cd, Ni, Mn, Fe, Pb, Cu and Co by inductively coupled plasma atomic emission spectrometry in waste water of feed additive zinc sulfate has been investigated. The coprecipitation conditions, such as the effect of the amount of zirconium solution, the aged time of precipitation, the enrichment factor and the possible matrix ions...
This study dealed with the distribution and the origin of trace elements (Co, Cd, Mn, Ni, Zn, Tl and Pb) in two soil profiles from a site near a plant roasting pyrite for sulfuric acid production. Chemical partitioning of the trace elements showed that Tl and Pb in each individual extractable fraction(i.e. weak acid exchangeable, reducible and oxidizable)presented increasing trend upward through the...
The contents and characteristics of ten heavy metals in surface sediments from Yangzonghai Lake in Yunnan, China were analyzed. Ecological risk index presented by Håkanson to assess the potential ecological risk of Yangzonghai Lake was utilized. The results showed that the average concentrations of titanium(Ti), manganese(Mn), zinc(Zn), vanadium(V), chromium(Cr), copper(Cu), nickel(Ni), cobalt(Co),...
This paper investigated the adsorption capacities of crushed oyster shells adsorbent for several heavy metal ions removal from synthetic landfill leachate using batch experiments. Adsorbent characterization, single-constituents metal ion adsorption kinetics, single metal adsorption equilibrium isotherm models were assessed. The results showed that: a 24 hour period was considered to provide an adequate...
A set of sixty six surface sediment samples were collected from the beach area and its adjacent region in Central part of Tamil Nadu State, SE Coast of India. The samples were analyzed for organic carbon, carbonates, texture of sediments and Partially Extracted Trace Metals (PETMs) (As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Pb, Sr, V, Zn). The results indicate that the organic carbon and carbonates in the...
The remains of zooplankton subfossil and sediment characteristics were examined from a macrophyte dominated shallow lake Wuliangsuhai in Inner Mongolia, China, in order to study past limnological changes. The lake began to switch to eutrophication gradually in the middle 1980s, creating a Transitional Sediment Layer (TSL, about 17 cm depth) that can be visually used to separate sediments derived from...
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