Journal ArticleDOI
Arsenic waste from water treatment systems: characteristics, treatments and its disposal
Tien Vinh Nguyen,Paripurnanda Loganathan,Saravanamuthu Vigneswaran,S. Krupanidhi,Thi Thu Nga Pham,Huu Hao Ngo +5 more
TLDR
In this article, the authors reviewed the characteristics of arsenic waste produced by arsenic treatment systems and the treatment and disposal methods of this waste and found that incorporating additives could increase the effectiveness of the solidification/stabilization (S/S) process depending on the type and dose of additives.Abstract:
As with other water treatment systems, arsenic treatment creates not only quality water but arsenic waste as well. Management of arsenic waste is now becoming a major public concern due to its harmful effects on the surrounding environment, including serious health problems such as skin cancers and various internal carcinomas. The main aim of this paper is to review: (i) the characteristics of arsenic waste produced by arsenic treatment systems; and (ii) the treatment and disposal methods of this waste. Arsenic waste type or its characteristics play an important role in choosing the best method of treatment and disposal. Currently, encapsulation of arsenic waste through solidification/stabilization (S/S) techniques is considered to be the most attractive solution and this method is the focus of this review. A number of studies have used cement by itself and in combination with additives such as lime, iron, silicates, or fly ash in the S/S process. Although there is a lack of systematic investigations and differing procedures for testing the effectiveness of the treatment methods, it was agreed that incorporating additives could increase the effectiveness of the S/S process depending on the type and dose of additives.read more
Citations
More filters
Journal ArticleDOI
Linear and nonlinear kinetic and isotherm adsorption models for arsenic removal by manganese ferrite nanoparticles
J. López-Luna,Loida E. Ramírez-Montes,Sergio Martínez-Vargas,Arturo I. Martinez,O.F. Mijangos-Ricardez,M. C. González-Chávez,Rogelio Carrillo-González,Fernando A. Solís-Domínguez,María del Carmen Cuevas-Díaz,Virgilio Vázquez-Hipólito +9 more
TL;DR: In this paper, the linear and nonlinear model suitabilities for adsorption data from aqueous As(III) removal by manganese ferrite nanoparticles (NPs) were analyzed.
Journal ArticleDOI
Natural Background and Anthropogenic Arsenic Enrichment in Florida Soils, Surface Water, and Groundwater: A Review with a Discussion on Public Health Risk.
Thomas M. Missimer,Christopher M. Teaf,William T. Beeson,Robert G. Maliva,John Woolschlager,Douglas J. Covert +5 more
TL;DR: Exposure to arsenic in soils at concentrations that exceed the Florida default cleanup level set specifically for residential environments does not necessarily pose a meaningful a priori public health risk, given important considerations.
Journal ArticleDOI
Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters
Mahatheva Kalaruban,Paripurnanda Loganathan,Tien Vinh Nguyen,T. Nur,Abu Hasan Johir,Thi Hai Nguyen,Minh Viet Trinh,Saravanamuthu Vigneswaran +7 more
TL;DR: The study indicates the high potential of GAC-Fe to remove arsenic from contaminated drinking waters in practical column filters and fitted the Freundlich model better than the Langmuir model, thus indicating the presence of heterogeneous adsorption sites.
Journal ArticleDOI
Chemical Contamination of Drinking Water in Resource-Constrained Settings: Global Prevalence and Piloted Mitigation Strategies
TL;DR: This review focuses on arsenic, fluoride, nitrates, lead, chromium, total dissolved solids, emerging organic contaminants, and, to a lesser extent, manganese, cadmium, selenium, and uranium, which have been proven effective in realistic water matrices and conditions.
References
More filters
Journal ArticleDOI
Arsenite and Arsenate Adsorption on Ferrihydrite: Kinetics, Equilibrium, and Adsorption Envelopes
TL;DR: In this paper, the authors compared the adsorption behavior of arsenite and arsenate on ferrihydrite, under carefully controlled conditions, with regard to adaption kinetics and the influence of pH.
Journal ArticleDOI
Cancer risks from arsenic in drinking water.
Allan H. Smith,Claudia Hopenhayn-Rich,Michael N. Bates,Helen M. Goeden,Irva Hertz-Picciotto,Heather M. Duggan,Rose Wood,Michael J. Kosnett,Martyn T. Smith +8 more
TL;DR: The evidence assessed here indicates that arsenic can also cause liver, lung, kidney, and bladder cancer and that the population cancer risks due to arsenic in U.S. water supplies may be comparable to those from environmental tobacco smoke and radon in homes.
Journal ArticleDOI
Effects and dose-response relationships of skin cancer and blackfoot disease with arsenic
TL;DR: The degree of permanent impairment of function in the patient was directly related to duration of intake of arsenical water and toduration of such intake at the time of onset, i.e., the higher the arsenic content of well water, the more patients with skin cancer and blackfoot disease.
Journal ArticleDOI
Microbial arsenic: from geocycles to genes and enzymes.
TL;DR: The DNA sequencing and protein crystal structures have established the convergent evolution of three classes of arsenate reductases, which involve three cysteine thiols and S-As bond intermediates, so convergence evolution to similar mechanisms has taken place.