Studies on the correlation between physicochemical properties of fly ash and its sorption of gas-phase arsenic

Environmental Technology
Kaihua ZhangKai Zhang

Abstract

This study investigated the adsorption behaviors of gas-phase arsenic on four kinds of fly ashes through using a fixed-bed reactor, and analyzed the correlation between sorption of gas-phase arsenic and physicochemical properties of fly ashes at different adsorption temperatures. The results showed that different fly ashes all had an adsorption effect on arsenic. The carbon content and specific surface area had a promoting effect on arsenic adsorption at the low temperature of 400℃, but there was no obvious correlation between arsenic adsorption and the contents of Fe2O3and CaO. However, it was exactly the opposite at the high temperature of 600℃. So the correlation between physicochemical properties of fly ash and its sorption of arsenic was proved to vary with temperature. It was further revealed that the physical adsorption predominated in temperatures ranging between 200℃ and 400℃, while the chemical adsorption predominated at further higher temperatures. The optimal temperature to maintain a high arsenic capture efficiency should be around 600℃.

References

Oct 24, 2007·Environmental Science & Technology·Karin LundholmAndrei Shchukarev
Apr 13, 2010·Environmental Geochemistry and Health·Izabela PolowczykZygmunt Sadowski
Apr 9, 2011·Environmental Technology·Zhi-Jian ZhangJian-Ying Zhang
May 31, 2011·The Science of the Total Environment·Hezhong TianJiming Hao
Apr 20, 2013·Journal of Environmental Sciences (China)·Wenqing XuPengfei Jing
Apr 2, 2014·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·M TiwariG G Pandit

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
atomic fluorescence spectroscopy

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.