One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water.
Summary of "One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water."
Mesoporous two-line (2-lines) ferrihydrite is successfully synthesized by a facile one-step method. The ferrihydrite is characterized by X-ray diffraction (XRD), Raman spectrum, N(2) adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The 2-lines ferrihydrite with mesoporous structure possesses excellent adsorption performance for arsenic (As(iii)) contamination. Experimental results show that As(iii) contamination can be effectively removed within 2 h by this 2-lines ferrihydrite, which is attributed to the special mesoporous structure and large surface area (133 m(2) g(-1)). The As(iii) loading capacity of our obtained mesoporous 2-lines ferrihydrite is up to 128 mg(As) g(-1)(Fe). In addition, As(iii) can be easily desorbed from 2-lines ferrihydrite by simple heat treatment in alkali solution. After reusage for 10 times, it still presents good adsorption performance, indicating the excellent stability of the 2-lines ferrihydrite. Furthermore, the mesoporous 2-lines ferrihydrite is also effective for As(iii) removal when some natural water constituents are present. Therefore, the high adsorption capability of the mesoporous 2-lines ferrihydrite makes it a potentially attractive adsorbent for the removal of As(iii) contamination from natural water.
Affiliation
Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin, 150086, People's Republic of China. Likang@ems.hrbmu.edu.cn.
Journal Details
This article was published in the following journal.
Name: Dalton transactions (Cambridge, England : 2003)
ISSN: 1477-9234
Pages: 2062-6
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21274474
- DOI: http://dx.doi.org/10.1039/c0dt01138j
Medical and Biotech [MESH] Definitions
Arsenic
A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)
Dimercaprol
An anti-gas warfare agent that is effective against Lewisite (dichloro(2-chlorovinyl)arsine) and formerly known as British Anti-Lewisite or BAL. It acts as a chelating agent and is used in the treatment of arsenic, gold, and other heavy metal poisoning.
Bowen's Disease
A persistent progressive non-elevated red scaly or crusted plaque which is due to an intradermal carcinoma and is potentially malignant. Atypical squamous cells proliferate through the whole thickness of the epidermis. The lesions may occur anywhere on the skin surface or on mucosal surfaces. The cause most frequently found is trivalent arsenic compounds. Freezing, cauterization or diathermy coagulation is often effective. (From Rook et al., Textbook of Dermatology, 4th ed, pp2428-9)
Arsenic Poisoning
Disorders associated with acute or chronic exposure to compounds containing ARSENIC (ARSENICALS) which may be fatal. Acute oral ingestion is associated with gastrointestinal symptoms and an encephalopathy which may manifest as SEIZURES, mental status changes, and COMA. Chronic exposure is associated with mucosal irritation, desquamating rash, myalgias, peripheral neuropathy, and white transverse (Mees) lines in the fingernails. (Adams et al., Principles of Neurology, 6th ed, p1212)
Ethionamide
A second-line antitubercular agent that inhibits mycolic acid synthesis. It also may be used for treatment of leprosy. (From Smith and Reynard, Textbook of Pharmacology, 1992, p868)
PubMed Articles
Novel synthesis and structural analysis of ferrihydrite.
Naturally occurring ferrihydrite is both impure and difficult to isolate, so the numerous applications and interesting properties of ferrihydrite have spurred the development of various synthetic tech...
We report a highly efficient synthetic strategy for self-assembled mesoporous γ-Al(2)O(3) materials using sodium salicylate as template. The mesoporous γ-Al(2)O(3) samples synthesized following this...
A facile ammonia-atmosphere pre-hydrolysis post-synthetic route that can uniformly and selectively deposit Fe(2) O(3) nanoparticles in the predefined mesopores (5.6 nm) of a bimodal (2.3, 5.6 nm) mes...
Facile Bucky-Bowl Synthesis by Regiospecific Cove-Region Closure by HF Elimination.
Building bowls: An effective intramolecular aryl-aryl coupling is the key step in rational fullerene synthesis and in synthesis of extended buckybowl structures. Such a process can be embodied very ef...
The ferrihydrite-backed DGT (diffusive gradients in thin films), recently developed for arsenic and phosphate measurements was, for the first time, characterized with respect to molybdate, antimonate,...
Clinical Trials
Synthesis of Glutathione From Low Birth Weight Newborn Babies
The aim of the study is to determine mechanisms leading to glutathione deficiency in low birth weight newborn babies. Compared to full term neonates, depletion in this population may be d...
Study of Oral Arsenic Trioxide With or Without Ascorbic Acid in Adults With Myelofibrosis
This study determine the highest safe dose of arsenic trioxide with or without ascorbic acid and if the investigational drug arsenic trioxide along with ascorbic acid (vitamin C) is effect...
Folic Acid and Creatine as Therapeutic Approaches for Lowering Blood Arsenic
The purpose of this study is to determine whether folic acid, alone or together with creatine supplementation, can lower blood arsenic concentrations and improve the ability to detoxify ar...
Arsenic Trioxide in Relapsed/Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma
Additional active agents are needed to further improve the treatment of patients with CLL/SLL. Increasing information exists regarding the activity of arsenic trioxide in other hematologic...
The purpose of this study is to find out the effectiveness and side effects of arsenic trioxide in combination with low-dose ara-C.
