Abstract This paper reviews plants and microorganisms removal of heavy metals from contaminated sites through bioaccumulation. Increased industrial activities have led to the uncontrolled release into environment, resulting in a global increase metal pollution. Heavy are also consumed surface glasses over prolonged period use. pollution is serious problem that can wide-ranging long-lasting impa...

The large-scale use of organophosphate esters (OPEs) as flame retardants and plasticizers has led to their prevalence in the environment, with still unknown broader impacts. This Review describes transport occurrence OPEs marine systems summarizes emerging evidence biogeochemical ecosystem Long-range environmental via atmosphere ocean currents distributes from industrialized regions open ocean....

Abstract When pollutants like petroleum hydrocarbons as one of the major origins aquatic pollution, enter environment, they alter biological and/or physicochemical characteristics aforementioned sites due to their potential bioaccumulation, biomagnification, and resistance against biodegradation besides its toxicity carcinogenicity in nature. Thus, importance degradation, deterioration remediat...

Unlike large dams which favor methylation of Hg in flooded soils over long periods, run-of-river are designed to flood a limited area and therefore not expected significantly affect mercury (Hg) cycling or carbon processing. We studied the cycles within food webs from several sectors along Saint-Maurice River, Quebec, Canada, that differ how they influenced by two other watershed disturbances. ...

Polychlorinated biphenyls (PCBs) were heavily used for over fifty years in industrial applications, primarily inside capacitors and transformers. Over twenty years after their phase-out in the United States PCBs are still one of the most widespread contaminants in the environment. PCBs are stable compounds with low aqueous solubility and vapor pressure. These unique properties led to the extens...

The methylated form of mercury (methylmercury) is a potent neurotoxic chemical and a contaminant of concern for fisheries because of its potential effects on ecosystem and human health. In Africa, inland fisheries are a crucial component of food and economic security, yet little information is available on mercury (Hg) contamination trends. The authors compiled published data on Hg contaminatio...

Ecosystems can be linked by the movement of matter and nutrients across habitat boundaries via aquatic insect emergence. Aquatic organisms tend to have higher concentrations of certain toxic contaminants such as methylmercury (MeHg) compared to their terrestrial counterparts. If aquatic organisms come to land, terrestrial organisms that consume them are expected to have elevated MeHg concentrat...

The transfer of selenium between bacteria and the ciliated protozoan, Paramecium putrinum, was examined in laboratory cultures. The population growth of the ciliate was not inhibited in the presence of the highest concentrations of dissolved selenite or selenate tested (10(3) micrograms liter-1). Experiments with radioactive 75selenite or 75selenate indicated that accumulation of selenium by ci...

Mirex is a persistent and toxic polychlorinated pesticide that has compromised environmental quality in the Great Lakes region since the 1960s. As a bioaccumulative and carcinogenic compound, mirex at its current levels in Lake Ontario is a concern because of the potential for trophic level transfer and biomagnification in top predators. As a part of the NOAA’s National Status and Trends Progra...

Mercury (Hg) and selenium (Se) biomagnify in aquatic food webs and are toxic to fish and wildlife. The authors measured Hg and Se in organic matter, invertebrates, and fishes in the Colorado River food web at sites spanning 387 river km downstream of Glen Canyon Dam (AZ, USA). Concentrations were relatively high among sites compared with other large rivers (mean wet wt for 6 fishes was 0.17-1.5...