title: Effective mercury(II) bioremoval from aqueous solution, and its electrochemical determination.
abstract: This work proposed mercury elimination using agricultural waste (Allium Cepa L.). The biomass removed 99.4% of mercury, following a pseudo-second order kinetics (r2= 0.9999). The Langmuir model was adequately fitted to the adsorption isotherm, thereby obtaining the maximum mercury adsorption capacity of 111.1 ± 0.3 mg g-1. The biomass showed high density of strong mercury chelating groups, thus making it economically attractive. Also, the implementation of a mercury-selective electrode for continuous determination in real time is proposed; this electrode replaces techniques like atomic absorption spectroscopy, thus it can be applied to real time studies. This work therefore presents a new perspective for removing mercury(II) from contaminated water for environmental remediation.
authors.affiliation: Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México.
authors.forename: Patricia
authors.initials: P
authors.lastname: Balderas-Hernández
authors.affiliation: Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Roa-Morales
authors.affiliation: Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P. 09340, Ciudad de México, México.
authors.forename: María Teresa
authors.initials: MT
authors.lastname: Ramírez-Silva
authors.affiliation: Departamento de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 180, Col. Reynosa-Tamaulipas, Del. Azcapotzalco, C.P. 02200, Ciudad de México, México.
authors.forename: Mario
authors.initials: M
authors.lastname: Romero-Romo
authors.affiliation: Instituto de Física, Universidad Nacional Autónoma de México, Ciudad Universitaria, C.P. 04510, Ciudad de México, México.
authors.forename: Erika
authors.initials: E
authors.lastname: Rodríguez-Sevilla
authors.affiliation: Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, C.P. 09340, Ciudad de México, México.
authors.forename: Juan Marcos
authors.initials: JM
authors.lastname: Esparza-Schulz
authors.affiliation: Centro Conjunto de Investigación en Química Sustentable CCIQS, UAEM-UNAM, Universidad Autónoma del Estado de México, Carretera Toluca-Atlacomulco, km 14.5, C.P. 50200, Toluca, México. Electronic address: el_inge85@hotmail.com.
authors.forename: Jorge
authors.initials: J
authors.lastname: Juárez-Gómez
mesh_terms: D000327:Adsorption; D018533:Biomass; D055664:Electrochemical Techniques / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008628:Mercury / Q000032:analysis*; D019697:Onions / Q000737:chemistry*; D012996:Solutions; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D008628:Mercury
keywords: Biosorbent; Breakthrough; ISE; Isotherm; Mercury adsorption