PMID- 31634812
OWN - NLM
STAT- MEDLINE
DCOM- 20191118
LR  - 20191118
IS  - 1879-2456 (Electronic)
IS  - 0956-053X (Linking)
VI  - 101
DP  - 2020 Jan 1
TI  - Intensification of supercritical water oxidation (ScWO) process for landfill 
      leachate treatment through ion exchange with zeolite.
PG  - 259-267
LID - S0956-053X(19)30634-8 [pii]
LID - 10.1016/j.wasman.2019.10.005 [doi]
AB  - Over the past few years, supercritical water oxidation (ScWO) has shown great 
      potential for application to landfill leachate treatment, providing substantial 
      organic matter degradation in terms of biochemical oxygen demand (BOD), chemical 
      oxygen demand (COD), and total organic carbon (TOC). However, the conversion of 
      ammonia, which is present at high concentrations in leachates, is the 
      rate-limiting step during ScWO and usually requires large amounts of oxidants, 
      the addition of catalysts, or severe operating conditions. Aiming at proposing a 
      treatment system that effectively removes both organic matter and ammonia from 
      leachate, this paper evaluates the intensification of the ScWO process through 
      ion exchange with zeolite. Thus, ScWO was operated under a pressure of 23 MPa at 
      600 and 700  degrees C, without the addition of oxidants. The zeolite (clinoptilolite) 
      was used without any modification inside a glass column. The ScWO 
      (600  degrees C)/zeolite system removed 90% ammoniacal nitrogen (NH(3)-N), 100% nitrite 
      (NO(2)-N), 98% nitrate (NO(3)-N), color, and turbidity, 81% TOC, and 74% COD, 
      suggesting that this system is a promising alternative for leachate treatment. 
      However, the final NH(3)-N and COD values were slightly above the limits (20 and 
      200 mg L(-1), respectively) stipulated by the Brazilian environmental 
      legislation. These results suggest that further improvements are still required 
      for the application of the intensified ScWO to be feasible. Notably, 
      ammonium-saturated clinoptilolite is amenable for regeneration or can be applied 
      to soil as a slow-release fertilizer.
CI  - Copyright (c) 2019 Elsevier Ltd. All rights reserved.
FAU - Scandelai, Ana Paula Jambers
AU  - Scandelai APJ
AD  - Department of Chemical Engineering, State University of Maringa, Avenida Colombo, 
      5790, Jd. Universitario, 87020900 Maringa, Parana, Brazil. Electronic address: 
      paulascandelai@hotmail.com.
FAU - Zotesso, Jaqueline Pirao
AU  - Zotesso JP
AD  - Department of Chemical Engineering, State University of Maringa, Avenida Colombo, 
      5790, Jd. Universitario, 87020900 Maringa, Parana, Brazil.
FAU - Jegatheesan, Veeriah
AU  - Jegatheesan V
AD  - School of Engineering, RMIT University, Melbourne, VIC 3000, Australia.
FAU - Cardozo-Filho, Lucio
AU  - Cardozo-Filho L
AD  - Department of Chemical Engineering, State University of Maringa, Avenida Colombo, 
      5790, Jd. Universitario, 87020900 Maringa, Parana, Brazil.
FAU - Tavares, Celia Regina Granhen
AU  - Tavares CRG
AD  - Department of Chemical Engineering, State University of Maringa, Avenida Colombo, 
      5790, Jd. Universitario, 87020900 Maringa, Parana, Brazil.
LA  - eng
PT  - Journal Article
DEP - 20191018
PL  - United States
TA  - Waste Manag
JT  - Waste management (New York, N.Y.)
JID - 9884362
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
RN  - 1318-02-1 (Zeolites)
SB  - IM
MH  - Brazil
MH  - Ion Exchange
MH  - Water
MH  - *Water Pollutants, Chemical
MH  - *Zeolites
OTO - NOTNLM
OT  - Adsorption
OT  - Ammonia removal
OT  - Clinoptilolite
OT  - Leachate treatment
OT  - ScWO
EDAT- 2019/10/22 06:00
MHDA- 2019/11/19 06:00
CRDT- 2019/10/22 06:00
PHST- 2019/03/08 00:00 [received]
PHST- 2019/08/23 00:00 [revised]
PHST- 2019/10/02 00:00 [accepted]
PHST- 2019/10/22 06:00 [pubmed]
PHST- 2019/11/19 06:00 [medline]
PHST- 2019/10/22 06:00 [entrez]
AID - S0956-053X(19)30634-8 [pii]
AID - 10.1016/j.wasman.2019.10.005 [doi]
PST - ppublish
SO  - Waste Manag. 2020 Jan 1;101:259-267. doi: 10.1016/j.wasman.2019.10.005. Epub 2019 
      Oct 18.