The objects of the research are phosphate ore rejections – industrial waste resulting from treatment by different processes (particle size separation, calcination, physicochemical process, electrostatically etc.). These discharges generally stored in specially constructed sedimentation ponds. However, its storage for a long period leads to serious environmental problems because they contain hea...

This volume is the publication of the proceedings of a conference held in Detroit, Michigan, in 1980. It is unfortunate that the publication was delayed nearly two years from the time of the meeting. However, knowledge is not accumulating quite as rapidly in this field as it is in some others, so the delay is not seriously deleterious. Over the past two decades knowledge of trace elements has i...

This volume is the publication of the proceedings of a conference held in Detroit, Michigan, in 1980. It is unfortunate that the publication was delayed nearly two years from the time of the meeting. However, knowledge is not accumulating quite as rapidly in this field as it is in some others, so the delay is not seriously deleterious. Over the past two decades knowledge of trace elements has i...

The aim of the study was to compare the effects of stress (contamination trials) on the microorganisms in zinc-polluted soil (5,018 mg Zn kg(-1) soil dry weight) and unpolluted soil (141 mg Zn kg(-1) soil dw), measured as soil respiration rate. In the laboratory, soils were subjected to copper contamination (0, 500, 1,500 and 4,500 mg kg(-1) soil dw), and then a bactericide (oxytetracycline) co...

The potential of near infrared spectroscopy (NIR) with remote reflectance fiber-optic probes for determining the mineral composition of propolis was evaluated. This technology allows direct measurements without prior sample treatment. Ninety one samples of propolis were collected in Chile (Bio-Bio region) and Spain (Castilla-León and Galicia regions). The minerals measured were aluminum, calciu...

The potential effects of proposed lead-zinc mining in an ecologically sensitive area were assessed by studying a nearby mining district that has been exploited for about 30 yr under contemporary environmental regulations and with modern technology. Blood and liver samples representing fish of three species (largescale stoneroller, Campostoma oligolepis, n=91; longear sunfish, Lepomis megalotis,...

Trace element concentrations were measured in Pacific Dunlin (Calidris alpina pacifica) to identify factors that influence accumulation and to assess toxicity risks. We report concentrations of cadmium, copper, and zinc in kidneys as well as copper, lead, mercury, selenium and zinc in feathers. Relationships between element concentrations and Dunlin age, sex, bill length, habitat preference, tr...

To investigate the impact of artisanal zinc smelting activities (AZSA) on the distribution and enrichment of trace metal(loid)s in street dust of a small city in Guizhou province, SW China, street dust samples were collected and analyzed for 10 trace metal(loid)s (Cr, Co, Ni, Cu, Zn, As, Cd, Sb, Pb, and Hg). Meanwhile, the health risks of local resident exposed to street dust were assessed. The...

This study shows clear evidence of an association between dyslexia and low concentrations of zinc in sweat. As in previous studies, higher concentrations of copper, lead, and cadmium and no differences in zinc concentrations were found in hair from dyslexic children compared with controls. In a study of adults one of us (SD) found that when sweat zinc concentration is very low hair zinc concent...