Chemical partitioning of heavy metal contaminants
... carbonate fraction of Cu in the present study indi- Chemical partitioning of heavy metal contaminants in sediments of the Pearl River Estuary20 Table 1 Means and ranges of heavy metal concentrations ... the Chemical partitioning of heavy metal contaminants in sediments of the Pearl River Estuary22 Figure 2 The total heavy metal concentrations in top sed...
Ngày tải lên: 15/03/2014, 23:22
... concentration of heavy metal [1-3]. Currently, heavy metal rich sludge is mainly treated by solidification then disposed/land filled and incineration. In addition, some treatment methods for reuse of ... Vietnam treatment and utilization of the heavy metal rich sludge has not sufficiently been studied and implemented. Objective of the study is to treat heavy met...
Ngày tải lên: 12/02/2014, 17:20
... bioavailability of heavy metals to many aquatic ecosystems. Precipitation depends on the solubility product K sp of the metal species involved, pH of the wetland and concentration of metal ions ... scavenging heavy metals from influent wastewater. The physico -chemical forms for heavy metals once in the wetlands change dramatically depending on several characteris...
Ngày tải lên: 15/03/2014, 23:06
Adsorption of heavy metal inons on soils and soil constituents
... accumulation of heavy metals. Therefore the study of adsorption processes is of utmost importance for the understanding of how heavy metals are transferred from a liquid mobile phase to the surface of ... solu- tion of the model. Often, only a simplified approach is used, i.e., the acid–base properties of the absorbent in absence of the heavy metal of interest are det...
Ngày tải lên: 15/03/2014, 23:09
A meta analysis and risk assessment of heavy metal uptake in common garden vegestable
... heavy metal uptake (Khan and Frankland 1983). Soil pH significantly influences heavy metal concentrations in both soil and plant tissues. The effect of soil pH on mobility of heavy metals ... a Microsoft Excel Spreadsheet (database). Data extracted included the name of metal, form of the metal, source of the contamination, dosed concentration, plant type, plant tiss...
Ngày tải lên: 15/03/2014, 23:10
Chelant extraction of heavy metal fromcontaminated soils
... quantity of heavy metals leached into solution generally was less than 1.7% of the total heavy metals contained in the soil sample. The deionized water extraction results indicated that the heavy metals ... or Tot Tot Ž. ML rCaL , i.e. the ratio of the solubility of heavy metal e.g. Pb, Cd to that of Tot Tot Ž. ambient cations e.g. Fe, Ca, Al for a given set of metal a...
Ngày tải lên: 15/03/2014, 23:22
Extraction of heavy metal availability in contaminated soil by a short sequential extraction procedure
Ngày tải lên: 16/03/2014, 00:07
Effect of metal spiking on different chemical pools and chemically extractable fractions of heavy metals
... Journal of Hazardous Materials 106B (2004) 133–137 Effect of metal spiking on different chemical pools and chemically extractable fractions of heavy metals in sewage sludge Geeta ... distinguish the effects of the spiked metals from that of other metals and various other contaminants present in the sludge. Since, bioavailability of metals added to soil as metal salts may...
Ngày tải lên: 16/03/2014, 00:07
Application and Comparison of Two Biotic Ligand Models Predicting Copper Toxicity and Accumulation in Heavy Metal Tolerant Moss
... removal of heavy metals using conventional physiochemical methods can be very costly, phytoremediation has gained increased attention in the last decades. Estimations of heavy metal toxicity ... model so far. More detailed modeling of the BLM about heavy metal detoxification and conformation change of BL leads to more appropriate prediction of heavy metal toxicity...
Ngày tải lên: 05/09/2013, 10:15
Báo cáo khoa học: Spectroscopic investigation of the reaction mechanism of CopB-B, the catalytic fragment from an archaeal thermophilic ATP-driven heavy metal transporter potx
... 2009) doi:10.1111/j.1742-4658.2009.07320.x The mechanism of ATP hydrolysis of a shortened variant of the heavy metal- translocating P-type ATPase CopB of Sulfolobus solfataricus was studied. The catalytic ... nucleotide-bound structure of Ca-ATPase (Fig. 1). The purine moiety fits into a cleft of the nucleotide-binding domain, whereas Fig. 1. 3D structural model of the catalyt...
Ngày tải lên: 07/03/2014, 00:20