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This study investigated the effect of leachate DOM on the adsorption of Cu, Cd, Pb and Zn in the typical cinnamon soil in Northern China. The adsorption experiments were conducted under the conditions of isotherm at 15, 25 35°C and at various acidities (pH=5-9). The results revealed that the process of soil adsorb these metals is accord with the adsorption isotherm formula of S=KCN and S=SmC/(C+1/K)...
By using a hydrothermal treatment process, coal fly ash was transferred to a series of synthesized zeolites and characterized XRD and SEM observations. The synthesized zeolites exhibited more enhanced adsorption capacities for metals compared to the raw material as the increased CEC of the synthesized zeolites apparently provides a better adsorptive ability for metals. For the three synthesized zeolite...
An investigation was conducted on the characteristics and leaching behavior of heavy metals from municipal solid wastes incineration (MSWI) fly ash in Chongqing, China. Results indicated that the average particle size of the fly ash was 36.4 μm, the large particles were formed mainly by small particles' adsorption or aggregation. The total content of the main heavy metals was about 1.04% of the fly...
The development of economic and efficient processes for the removal of heavy metals present in acidic effluents from industrial sources or decontamination technologies has become a priority. The purpose of this work was to study the efficiency with which cocoa shells remove heavy metals from acidic solutions (pH 2) and to investigate how the composition of these solutions influences heavy metal uptake...
The purpose of this study was to examine the efficiency with which some natural adsorbents remove heavy metals, especially lead, from very acidic leachate produced during soil decontamination by a chemical leaching process using hydrochloric acid. Sorption assays were done in shaken flasks in the presence of cocoa shells, cedar bark, pine bark, spruce bark, vermiculite and volcanic rocks. Cocoa shells...
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