PMID: 15244341Jul 13, 2004Paper

Retardation of phosphate release from freshwater benthic sediments by application of ocher pellets with calcium nitrate

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Yu-Mee Na, Seok S Park

Abstract

This article presents an in situ treatment method for retardation of phosphate release from freshwater benthic sediments. The method is based on the addition of ocher pellets into benthic sediments. The pellets consist of ocher and calcium nitrate (OCN pellet). The OCN pellet slowly releases calcium and nitrate, together with ocher, into the sediment water interface, where all three components play an important role in reducing phosphate release from sediments. Each component was applied to sediments to examine the individual effects in this study. Bench scale experiments were performed with the following treatments: (1) ocher, (2) calcium, (3) nitrate, (4) calcium nitrate, (5) calcium nitrate and ocher, and 6) no treatment. The sediment without any treatment released a phosphate flux of 10.82 mg/m2/d. The sediment with ocher, calcium, and nitrate treatments, released phosphate fluxes of 8.41, 6.41, and 0.95 mg/m2/d, respectively. This can be attributed to the fact that nitrate, acting as an electron acceptor of organic matter degradation, prevents the dissolution of phosphate bound to iron oxides. In addition, calcium and ocher can bind the dissolved phosphate. An increase of pH together with nitrate reduction helps the calciu...Continue Reading

References

Feb 16, 2002·The Science of the Total Environment·William A House, Frank H Denison

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.