**Meet the editors**

Dinora Vázquez-Luna earned a Doctoral Degree from Colegio de Postgraduados, Mexico. She is a full-time professor at the Engineering School in Agricultural Production Systems (FISPA, for its Spanish acronym) at Universidad Veracruzana (UV, for its Spanish acronym). She is a researcher acknowledged by the National Researchers System of Mexico. Currently, she is a member

of the Academic Council of Master and Doctoral Degrees in Agricultural Sciences, where she is also a doctoral thesis advisor in Biotechnology. She has published 25 papers in reputed journals and has been serving as a reviewer for international journals on topics related to agronomy, ecotoxicology and environmental sciences.

María del Carmen Cuevas-Díaz achieved her PhD in Sciences in Ecology and Biotechnology from the Institute of Biotechnology and Ecology at the University of Veracruz and her Master of Science in Environmental Engineering. She has had a PRODEP profile since 2009 and is a member of the National System of Researchers according to the 2008 call. She has published 14 articles

in international journals indexed by rigorous arbitration, one national, and three in electronic magazines of diffusion. She has also been the editor of a book by INECC-SEMARNAT and published 4 chapters in various books. Dr. Díaz has provided direction for at least 30 theses at the undergraduate level and participated with 16 works in national and 8 international congresses. She is responsible for environmental technical work for PEMEX-Refining, participation in the SEDESOL project in its environmental part for the municipality of Sotepan, Veracruz, and two projects financed by CONACYT and SEP. Dr. Díaz has collaborated in the Project of the Research Center in Electrochemistry of Querétaro, as well as the Faculty of Engineering in Agricultural Production Systems of the Universidad Veracruzana. She is a representative of the academy before the Cuenca Council of the Coatzacoalcos River and head of the Environmental Research Laboratory. She is now a full-time professor at the Faculty of Chemical Sciences and a representative of the academic body in consolidation before SEP-PRODEP with code CAEC-332 Environmental and Biotechnological Processes with generation lines Biotechnology and Environmental Engineering and Sustainability.

Contents

**Preface VII**

**Section 1 Soil Contamination 1**

**the Soil 13**

**Potosi, Mexico 35**

**Agricultural Areas 57**

**Efficiency Fertilizers 73**

Fernanda Funes

**Sustainable Development 3**

Chapter 1 **Introductory Chapter: Soil Contamination and Alternatives for**

Chapter 2 **Ecotoxicological Tests as a Tool to Assess the Quality of**

Barbara Clasen and Roberta de Moura Lisbôa

Chapter 3 **Evaluation of the Biological Activity of Soil in a Gradient**

Chapter 4 **Flow in Unsaturated Soils and Transport of Herbicides in**

Chapter 5 **Mitigation of Nitrous Oxide Emissions during Nitrification and**

**Section 2 Alternatives for Sustainable Development 71**

Yoshitaka Uchida and Isabell von Rein

Dinora Vázquez-Luna and María del Carmen Cuevas-Díaz

**Concentration of Arsenic and Lead in Villa de la Paz, San Luis**

Donaji J. González-Mille, Guillermo Espinosa-Reyes, María del Carmen Cuevas-Díaz, Ángeles Martínez-Toledo, Leticia Carrizalez-Yáñez, María E. García-Arreola and César A. Ilizaliturri-Hernández

Teresa María Reyna, María Lábaque, Santiago Reyna and Maria

**Denitrification Processes in Agricultural Soils Using Enhanced**
