This study compares changes in children’s blood lead levels in the United States with subsequent changes in IQ, based on norm comparisons for the Cognitive Abilities Test (CogAT) given to representative national samples of children in 1984 and 1992.

Lead ions in the heavy metal pollution are on of the important environmental problem in the aqueous system originated from industry. Generally, heavy metal containing wastewaters have low biological oxygen demand and are very high toxic for micro-organisms responsible for biological oxidation of organic matter.

In this research, the ability of natural zeolite clinoptilolite to remove lead from aqueous solutions has been investigated in batch adsorption experiments. Adsorption tests of Pb(II) were carried out using a solid to liquid ratio of 20 g/L and agitation speed of 700 rpm.

Heavy metal containing waste-waters originate mainly from electroplating, metal finishing, metallurgical, chemical manufacturing, mining and battery manufacturing processes in considerable amounts. Heavy metals are well-known toxic elements and their discharge into receiving…

This study is among the first to examine specific neurobehavioral deficits in children exposed at very low lead levels. A systematic analysis for the presence of a threshold of lead exposure was conducted. The sample consisted of 246 African American, inner-city children from whom blood…

Environmental concerns associated with the confined feeding operations (CAFOS) have been a topic of major importance in Canada and the United States for several years. In 2000, in Ontario Canada a severe E-coli problem resulted in approximately seven deaths and an additional 2300 people became ill.

Clinoptilolite is a nontoxic natural zeolite with properties of an ion-exchanger and adsorbent. Earlier studies showed that clinoptilolite could be an adjuvant in cancer therapy. The aim of this study was to define effects of clinoptilolite in cell media on cell viability and activity of key proteins regulating …

Abstract. Natural silicate materials, including zeolite clinoptilolite, have been shown to exhibit diverse biological activities and have been used successfully as a vaccine adjuvant and for the treatment of diarrhea. We report a novel use of finely ground clinoptilolite as a potential adjuvant in anticancer therapy.

Abstract Background: Treatment of cancer-bearing mice and dogs with micronized zeolite clinoptilolite (MZ) led to improvement of the overall health status, prolongation of life span and decrease of tumor size in some cases. It also reduced lipid peroxidation in the liver of mice.

Natural zeolite, clinoptilolite was tested for its ability to remove uranium from aqueous solutions. Influence parameters to the sorption process, such as initial uranium concentration, pH, contact time and temperature were investigated. Distribution coefficients of uranium on clinoptilolite were measured by batch technique.

Mass action quotients for the synthetic zeolites Linde 4AXW, 13X, AW-300, AW-400, AW-500, Norton Zeolon and the natural zeolites clinoptilolite and erionite were determined for low cesium or strontium concentrations in the binary systems cesium-sodium, cesium- potassium, cesium-rubidium…

Adsorptive behavior of natural clinoptilolite-rich zeolite from Balikesir deposites in Turkey was assessed for the removal of uranium from aqueous solutions. The uranium uptake and cation exchange capacities of zeolite were determined. The effect of initial uranium concentrations in solution was studied in detail at the optimum conditions determined…

UraniumVI sorption experiments involving quartz and clinoptilolite, important mineral phases at the proposed US nuclear waste repository at Yucca Mountain, NV, were conducted to evaluate the ability of surface complexation models to predict UVI sorption onto mineral mixtures based on parameters derived from single-mineral experiments.

This paper describes the interactions of Pb(II), Cd(II), and Cr(VI) competing for ion-exchange sites in naturally occurring clinoptilolite. Dissolved Pb and Cd were effectively removed within 18 h in batch reactors, with higher removal efficiencies (>95%) in the acidic pH range.

The aim of this study was to evaluate the antiviral properties of clinoptilolite, a natural non-toxic zeolite. Herein, a fine powder of micronized zeolite (MZ) was obtained by tribomechanical micronization of natural clinoptilolite.

Due to their remarkable properties, natural zeolites have come to the attention of medicine researchers to find new ways of treating various diseases and ensure an improved supply of minerals in nutrition.

In this study, the adsorption behavior of natural (clinoptilolite) zeolites with respect to Co2+, Cu2+, Zn2+, and Mn2+ has been studied in order to consider its application to purity metal finishing wastewaters.

Structural peculiarities of clinoptilolite and heulandite are reviewed. Special attention is given to partial Si, Al ordering within the  tetrahedral framework structure.

Chromium (VI) adsorption behavior and capacity by surface modified nanozeolite A has been investigated. Surface modification was performed and the morphology of modified and unmodified nanozeolite was studied using…

Cancer is a leading cause of morbidity, mortality, and premature death worldwide. Certain strategies for minimizing carcinogenic factors’ exposure can reduce the risk of most cancer types in human.

For nearly 200 years since their discovery in 1756, geologists considered the zeolite minerals to occur as fairly large crystals in the vugs and cavities of basalts and other traprock formations.

AECL’s CHEMIC TM process has effectively treated in excess of 4 million gallons of radiostrontium-contaminated water since 1993.

A winter feeding experiment evaluated effects of adding clinoptilolite zeolite clay at 1.2% of the diet on steer performance and nitrogen (N) volatilization loss.

Although a relatively obscure metal, thallium is found in many mining waters and, because of its toxic nature, must be removed to low levels. A low cost natural zeolite, clinoptilolite, has been found to effectively remove thallium from water at a closed gold mine. Thallium is a soft metal now used in electronics, pharmaceuticals and glass manufacturing.

The paper discusses the application of natural zeolites from clinoptilolite group for mercury removal from industrial effluents from copper smelter and refinery. The experiments included studies on sorption mechanisms (adsorption or ion-exchange) and sorption equilibria. The dominating mechanism of sorption with zeolite was found to be ion exchange…

Lead is a confirmed neurotoxin, but questions remain about lead-associated intellectual deficits at blood lead levels < 10 μg/dL and whether lower exposures are, for a given change in exposure, associated with greater deficits. The objective of this study was to examine the association of intelligence…

In this research, the ability of natural zeolite clinoptilolite to remove lead from aqueous solutions has been investigated in batch adsorption experiments. Adsorption tests of Pb(II) were carried out using a solid to liquid ratio of 20 g/L and agitation speed of 700 rpm.

The association between to early lead exposure and later behavior problems was evaluated prospectively in a cohort to 8-year old children born during a 12 month period at one hospital.