Occurrence and treatment of arsenic in groundwater and soil in northern Mexico and southwestern USA

Camacho, Lucy Mar; Gutiérrez, Mélida; Alarcón-Herrera, María Teresa; Villalba, María de Lourdes; Deng, Shuguang

doi:10.1016/j.chemosphere.2010.12.067

Cited by 178 publications

(88 citation statements)

References 115 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to the high toxicities of As and Sb, the drinking water standards suggested by the World Health Organazation (2011) are set at 10 mg/l (As) and 5 mg/l (Sb). Different treatment techniques to remove As and/or Sb from groundwater have been studied intensively, and include coagulation/flocculation, iron exchange, adsorption, and chemical redox (Camacho et al, 2011;Pawlak et al, 2006;Ungureanu et al, 2015). These techniques are often adopted for pre-and deep-treatment in addition to traditional groundwater remediation (i.e., aerationfilter-disinfection).…”

Section: Introductionmentioning

confidence: 99%

Treatment of groundwater containing Mn(II), Fe(II), As(III) and Sb(III) by bioaugmented quartz-sand filters

et al. 2016

View full text Add to dashboard Cite

a b s t r a c tHigh concentrations of iron (Fe(II)) and manganese (Mn(II)) often occur simultaneously in groundwater. Previously, we demonstrated that Fe(II) and Mn(II) could be oxidized to biogenic Fe-Mn oxides (BFMO) via aeration and microbial oxidation, and the formed BFMO could further oxidize and adsorb other pollutants (e.g., arsenic (As(III)) and antimony (Sb(III))). To apply this finding to groundwater remediation, we established four quartz-sand columns for treating groundwater containing Fe(II), Mn(II), As(III), and Sb(III). A Mn-oxidizing bacterium (Pseudomonas sp. QJX-1) was inoculated into two parallel bioaugmented columns. Long-term treatment (120 d) showed that bioaugmentation accelerated the formation of Fe-Mn oxides, resulting in an increase in As and Sb removal. The bioaugmented columns also exhibited higher overall treatment effect and anti-shock load capacity than that of the nonbioaugmented columns. To clarify the causal relationship between the microbial community and treatment effect, we compared the biomass of active bacteria (reverse-transcribed real-time PCR), bacterial community composition (Miseq 16S rRNA sequencing) and community function (metagenomic sequencing) between the bioaugmented and non-bioaugmented columns. Results indicated that the QJX1 strain grew steadily and attached onto the filter material surface in the bioaugmented columns. In general, the inoculated strain did not significantly alter the composition of the indigenous bacterial community, but did improve the relative abundances of xenobiotic metabolism genes and Mn oxidation gene. Thus, bioaugmentation intensified microbial degradation/utilization for the direct removal of pollutants and increased the formation of Fe-Mn oxides for the indirect removal of pollutants. Our study provides an alternative method for the treatment of groundwater containing high Fe(II), Mn(II) and As/ Sb.

show abstract

Section: Introductionmentioning

confidence: 99%

Treatment of groundwater containing Mn(II), Fe(II), As(III) and Sb(III) by bioaugmented quartz-sand filters

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Well-known arsenic contaminated regions include Bangladesh, India and other countries. In Mexico, sources of drinking water exceeding 10 µg l -1 have been found in Baja California Sur, Chihuahua, Coahuila, Durango, Zacatecas, Hidalgo, Morelos, Guanajuato, Sonora and San Luis Potosí (Camacho et al, 2011). In Spain, the presence of naturally occurring arsenic in groundwater has been reported in the sedimentary Duero and Tajo Cenozoic basins, located in central Spain (García-Sánchez et al, 2005;Gómez et al, 2006;Vega et al, 2008) .…”

Section: Introductionmentioning

confidence: 99%

Sequential Injection Anodic Stripping Voltammetry at Tubular Gold Electrodes for Inorganic Arsenic Speciation

Rodríguez¹,

Barrado²,

Vega³

et al. 2012

Electrochemical Cells - New Advances in Fundamental Researches and Applications

View full text Add to dashboard Cite

“…Cases of severe arsenic poisoning in humans have been reported in many places around the world, including Bangladesh, India, Vietnam, China, Chile, Mexico, Argentina and USA [3][4]. This element occurs as a natural constituent of rock, soil, water and atmosphere as well as may originate from the anthropogenic sources.…”

Section: Introductionmentioning

confidence: 99%

Implementation of ferric hydroxide-based media for removal of toxic metalloids

Szlachta

Wójtowicz

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. Effective removal of inorganic arsenic species is possible by application of the sorption technique with the use of iron-based sorbents. This study investigates the removal of arsenic(III) and arsenic(V) from an aqueous solution by application of a granular ferric hydroxide-based sorbent. The performance of tested media was evaluated based on the batch and fixed-bed adsorption studies. The efficiency of the process was determined with various treatment times, adsorbent doses, initial concentrations of arsenic and various solution temperatures. The obtained adsorption data were fitted with pseudo-first and second-order kinetic models and Langmuir and Freundlich isotherm equations. It was observed that the overall arsenite removal was lower when compared to the arsenate, and all tested operating parameters influenced the process efficiency. The experiments under dynamic conditions showed high treatment capacity and stability of tested adsorbent over a long period of time.

show abstract

Occurrence and treatment of arsenic in groundwater and soil in northern Mexico and southwestern USA

Cited by 178 publications

References 115 publications

Treatment of groundwater containing Mn(II), Fe(II), As(III) and Sb(III) by bioaugmented quartz-sand filters

Treatment of groundwater containing Mn(II), Fe(II), As(III) and Sb(III) by bioaugmented quartz-sand filters

Sequential Injection Anodic Stripping Voltammetry at Tubular Gold Electrodes for Inorganic Arsenic Speciation

Implementation of ferric hydroxide-based media for removal of toxic metalloids

Contact Info

Product

Resources

About