CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis

It is difficult to adjust the pH of oil acidized wastewater rich in Ca2+, thus hindering the polyacrylamide (PAM) flocculation. This study aims at accelerating the flocculation process by introducing CO2 into the water to induce the formation of CaCO3 nuclei. The order in which CO2 and NaOH were add...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jinyi Qin, Yifan Gong, Chuan Qin, Hailong Meng, Yiwen He, Qingyang Qin, Junfa Gao
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	ca2+ co2 floc core oil acidized wastewater polyacrylamide Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/873a79a021894db698aad856ae31a78d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:873a79a021894db698aad856ae31a78d
record_format	dspace
spelling	oai:doaj.org-article:873a79a021894db698aad856ae31a78d2021-11-06T10:50:51ZCO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis0273-12231996-973210.2166/wst.2021.054https://doaj.org/article/873a79a021894db698aad856ae31a78d2021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/5/1108https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732It is difficult to adjust the pH of oil acidized wastewater rich in Ca2+, thus hindering the polyacrylamide (PAM) flocculation. This study aims at accelerating the flocculation process by introducing CO2 into the water to induce the formation of CaCO3 nuclei. The order in which CO2 and NaOH were added affected the floc structures. Compared with CO2-NaOH-PAM, the flocs of NaOH-CO2-PAM were more compact and more CaCO3 crystals were formed. The aqueous Ca2+ involved in the reaction reached 20%, and CO2 utilization was enhanced. The settling time was shortened by half (from 20 to 3 min), and NaOH consumption was reduced by one-tenth (from 0.03 to 0.003 mol), hence significantly reducing the costs. Due to the higher settling rate and shorter contact time, the NaOH-CO2-PAM flocs adsorbed less so that the residual oil was 124 mg·L−1, while in the case of CO2-NaOH-PAM it was 88 mg·L−1. As a promising coagulation aid, CO2 can also be used to mineralize pollutants in wastewater.Jinyi QinYifan GongChuan QinHailong MengYiwen HeQingyang QinJunfa GaoIWA Publishingarticleca2+co2floc coreoil acidized wastewaterpolyacrylamideEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 5, Pp 1108-1117 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ca2+ co2 floc core oil acidized wastewater polyacrylamide Environmental technology. Sanitary engineering TD1-1066
spellingShingle	ca2+ co2 floc core oil acidized wastewater polyacrylamide Environmental technology. Sanitary engineering TD1-1066 Jinyi Qin Yifan Gong Chuan Qin Hailong Meng Yiwen He Qingyang Qin Junfa Gao CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
description	It is difficult to adjust the pH of oil acidized wastewater rich in Ca2+, thus hindering the polyacrylamide (PAM) flocculation. This study aims at accelerating the flocculation process by introducing CO2 into the water to induce the formation of CaCO3 nuclei. The order in which CO2 and NaOH were added affected the floc structures. Compared with CO2-NaOH-PAM, the flocs of NaOH-CO2-PAM were more compact and more CaCO3 crystals were formed. The aqueous Ca2+ involved in the reaction reached 20%, and CO2 utilization was enhanced. The settling time was shortened by half (from 20 to 3 min), and NaOH consumption was reduced by one-tenth (from 0.03 to 0.003 mol), hence significantly reducing the costs. Due to the higher settling rate and shorter contact time, the NaOH-CO2-PAM flocs adsorbed less so that the residual oil was 124 mg·L−1, while in the case of CO2-NaOH-PAM it was 88 mg·L−1. As a promising coagulation aid, CO2 can also be used to mineralize pollutants in wastewater.
format	article
author	Jinyi Qin Yifan Gong Chuan Qin Hailong Meng Yiwen He Qingyang Qin Junfa Gao
author_facet	Jinyi Qin Yifan Gong Chuan Qin Hailong Meng Yiwen He Qingyang Qin Junfa Gao
author_sort	Jinyi Qin
title	CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
title_short	CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
title_full	CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
title_fullStr	CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
title_full_unstemmed	CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
title_sort	co2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/873a79a021894db698aad856ae31a78d
work_keys_str_mv	AT jinyiqin co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT yifangong co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT chuanqin co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT hailongmeng co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT yiwenhe co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT qingyangqin co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis AT junfagao co2introducedthecoagulationflocculationofoilacidizedwastewaterpollutantremovalandcostanalysis
_version_	1718443743167643648

CO2 introduced the coagulation-flocculation of oil acidized wastewater: pollutant removal and cost analysis

Ejemplares similares