An In Vitro Study of the Effects of Temperature and pH on Lead Bioremoval Using Serratia marcescens

Dafne Lecca-Caballero, Eyber Vega-Moreno, Luis Cabanillas-Chirinos, Karen Diaz Del Aguila, Walter Rojas-Villacorta, Waldo Salvatierra-Espinola, Renny Nazario Naveda, Segundo Rojas-Flores () and Magaly De La Cruz-Noriega
Additional contact information
Dafne Lecca-Caballero: Escuela de Ingeniería Ambiental, Universidad César Vallejo, Trujillo 13001, Peru
Eyber Vega-Moreno: Escuela de Ingeniería Ambiental, Universidad César Vallejo, Trujillo 13001, Peru
Luis Cabanillas-Chirinos: Instituto de Investigación en Ciencia y Tecnología, Universidad César Vallejo, Trujillo 13001, Peru
Karen Diaz Del Aguila: Programa de Investigación Formativa e Integridad Científica, Universidad César Vallejo, Trujillo 13001, Peru
Walter Rojas-Villacorta: Programa de Investigación Formativa e Integridad Científica, Universidad César Vallejo, Trujillo 13001, Peru
Waldo Salvatierra-Espinola: Facultad de Ciencias de la Salud, Universidad Cesar Vallejo, Trujillo 13001, Peru
Renny Nazario Naveda: Vicerrectorado de Investigación, Universidad Autónoma del Perú, Lima 15842, Peru
Segundo Rojas-Flores: Escuela de Ingeniería Mecánica Eléctrica, Universidad Señor de Sipán, Chiclayo 14000, Peru
Magaly De La Cruz-Noriega: Instituto de Investigación en Ciencia y Tecnología, Universidad César Vallejo, Trujillo 13001, Peru

Sustainability, 2023, vol. 15, issue 19, 1-11

Abstract: Heavy metal contamination of water is a widespread problem in Peru and represents a potential threat to the ecosystem. Bacteria are an ecological alternative to treating these effluents. This research aims to determine the influence of temperature and pH on the lead (Pb) bioremoval in surface water using Serratia marcescens under laboratory conditions. The sample was collected from a stream located in Santiago de Chuco City (Peru). Treatments (T) were carried out by combining pH (5 and 7) and temperature (25, 30, and 35 °C). The bacterial inoculum ( S. marcescens ) was 3 × 10 8 CFU/mL, which was constant in all treatments. The lead bioremoval evaluation was performed in an airlift bioreactor and the incubation time was 24 h. The total lead concentration was determined using atomic absorption spectrophotometry. The results show that treatment 6 (temperature: 35 °C, pH: 5, and inoculum: 3 × 10 8 UFC/mL) showed a better result than the other treatments, with a removal value of 63.94%. Furthermore, the total lead concentration decreased from an initial concentration of 0.268 mg Pb/L to a final value of 0.0964 mg Pb/L. These results are still above the allowed water value (15 µg/L) according to Peruvian standards. On the other hand, temperature and pH influenced lead removal from surface water when S. marcescens was used after a short incubation period (24 h). Although an attempt was made to improve lead bioremoval by varying two parameters, temperature and pH, future research is still needed to investigate the effect of different inoculum concentrations, the use of microbial consortia, and a broader range of physicochemical parameters.

Keywords: Serratia marcescens; lead; bioremoval; heavy metals; bioremediation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/19/14048/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/19/14048/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:19:p:14048-:d:1245247

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().