Removal of phosphorus from wastewaters by biomass ashes

被引：9

作者：

Barbosa, R. ^{[1
]}

Lapa, N. ^{[1
]}

Lopes, H. ^{[2
]}

Morujo, A. ^{[1
]}

Mendes, B. ^{[1
]}

机构：

[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Sci & Technol Biomass, P-2829516 Monte De Caparica, Portugal

[2] Lab Nacl Energia & Geol, Unidade Tecnol Conversao & Armazenamento Energia, P-1649038 Lisbon, Portugal

来源：

WATER SCIENCE AND TECHNOLOGY | 2013年 / 68卷 / 09期

关键词：

biomass ashes; ecotoxicity; pulp and paper mill wastewater; removal of phosphates; PHOSPHATE REMOVAL; AQUEOUS-SOLUTIONS;

D O I：

10.2166/wst.2013.455

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Removal batch assays of phosphates from a synthetic wastewater (SWW) and a pulp and paper mill wastewater (PPWW) with two forestry biomass ashes were performed. The supernatants were not only chemically characterized but also the ecotoxicity was determined using two organisms: Vibrio fischeri and Artemia franciscana. The addition of fly ash and bottom ash to the SWW in solid/liquid (S/L) ratios of 3.35 and 9.05 g L-1, respectively, achieved removal percentages of phosphates >97% for both ashes. The addition of fly ash and bottom ash to the PPWW in S/L ratios of 34.45 and 46.59 g L-1, respectively, yield removal percentages of phosphates >90% for both ashes. According to the results of the Langmuir and Freundlich isotherms, the removal of phosphates from the SWW was mainly explained by surface removal mechanisms, while the removal from the PPWW was partially explained by multi-layer mechanisms. The supernatants resulting from the treatment of SWW and PPWW with both biomass ashes did not present acute ecotoxicity.

引用

页码：2019 / 2027

页数：9

共 19 条

[1] A review on the utilization of fly ash [J].