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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of wastewater disinfectants on the soil: Implications for soil microbial and chemical attributes

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Agnelo, Lucas [1] ; Leonel, Lays Paulino [1] ; Silva, Noely Bochi [1] ; Candello, Fernando Pena [1] ; Schneider, Jerusa [2] ; Tonetti, Adriano Luiz [1]
Total Authors: 6
[1] Univ Estadual Campinas, UNICAMP, Sch Civil Engn Architecture & Urbanism FEC, Ave Albert Einstein 951, Cidade Univ Zeferino Vaz, BR-951 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, BR-13083855 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Science of The Total Environment; v. 706, MAR 1 2020.
Web of Science Citations: 0

In most cases, chlorination is used for effluent disinfection. However, this process can lead to the formation of byproducts hazardous to the environment and public health. Therefore, new disinfecianis, such as calcium hypochlorile (CH) and peracetic acid (PM), were investigated as allemalives. This study aimed at determining doses of the disinfectants PAA and CH W be applied to the soil and analyzing the possible changes in he major chemical and microbiological attributes of the soil, thus encouraging the practice of reusing wastewater in agriculture. Initially, toxicity bioassays were conducted with lettuce (Luctuca saliva L.) seeds in order Lo determine which concentrations affected germination and also which would be analyzed. From these trials, three concentrations of each disinfectant were chosen to be subjected to basal respiration, microbial biomass carbon and metabolic quotient analyses. Doses of 3, 5 and 10 mg L-1 were used for PAA, and concentrations of 25,32 and 64 mg L-1 for CH. Thus, it was observed that the greater concentration of each disinfectant provided a significant increase in the metabolic potential of microorganisms. However, it was observed that PAA increased ecotoxicity besides promoting changes in the chemical attributes of the soil, compared to CH. On the other hand, concentrations of 3 mg L-1 and 25 mg L-1 of PAA and CH, respectively, did not cause large impacts and could be an alternative in effluent disinfection with the aim of recycling it in agriculture. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 17/07490-4 - Nitrogen removal in anaerobic reactors
Grantee:Adriano Luiz Tonetti
Support type: Regular Research Grants