Evaluation of the potential of volcanic rock waste from southern Brazil as a natural soil fertilizer

JOURNAL OF CLEANER PRODUCTION

卷:142

Article

Ramos, Claudete Gindri¹  Querol, Xavier⁴  Dalmora, Adilson Celimar¹  de Jesus Pires, Karen Cristina²  Homrich Schneider, Ivo Andre³  Silva Oliveira, Luis Felipe⁵  Kautzmann, Rubens Muller¹ 

[1] Ctr Univ Salle, Lab Environm Res & Nanotechnol Dev, Avaliacao Impactos Ambientais, 2288 Ctr, BR-92010000 Canoas, RS, Brazil

[2] DNPM, Washington Luiz,815,Ctr, BR-90010460 Porto Alegre, RS, Brazil

[3] Univ Fed Rio Grande do Sul, Ave Bento Goncalves,9500 Predio 75,Sala 122, BR-91501970 Porto Alegre, RS, Brazil

[4] Inst Environm Assessment & Water Res IDAEA CSIC, C Luis Sole y Sabaris S-N, Barcelona 08028, Spain

[5] Univ Costa, Fac Environm Sci, Res Grp Environm Management & Sustainabil, Barranquilla, Colombia

关键词: Volcanic rock powders;    Mining waste;    Safe environmental;    Natural soil fertilizers;   

DOI  :  10.1016/j.jclepro.2016.11.006

来源: Elsevier

【 摘 要 】

This study was developed to evaluate the chemical and mineralogical properties of acid volcanic rock waste from mining activities by measuring the availability of macronutrients and micronutrients in Milli-Q water, and in acidic solutions to evaluate the potential use of this type of waste as natural soil fertilizers. The sample used in this work was obtained from a company of the mining district of Nova Prata, Rio Grande do Sul State, southern Brazil. Petrographic studies using conventional optical microscopy and scanning electron microscope allowed to define the mineral composition of in powder wastes as being comprised mainly by pyroxene, feldspar, and variable contents of amorphous glass in matrix. The primary oxides detected in the samples by X-ray Fluorescence were calcium oxide, silicon dioxide, aluminium oxide, iron oxide, and with concentration minor potassium oxide, and phosphorus oxide. Several important nutrients were transferred into the acidic solutions, indicating the significant potential and feasibility of these wastes to be effectively used as natural fertilizers. This study is of great relevance to, the sector of mining and to agriculture in the region because it can create an alternative disposal treatment for tailings, and improve the environmental sustainability of local farms, thereby avoiding excessive chemical fertilizer consumption. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free