Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation

Nitrogen-containing organic compounds and nitrogenous disinfection by-products (N-DBPs) in drinking water have attracted attention in the field of water treatment. Metabolites released during algae growth contain a variety of organic nitrogen species, which are called N-DBP precursors. The aim of th...

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Autores principales:	Weiliang Pan, Yunpeng Cao, Rui Deng, Li Gu, Jian Xu, Changlong Ding
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	algae-laden water concentration metabolites nitrogenous disinfection by-product (n-dbp) formation potential release uv radiation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/d92423ff6c9b4f7cadc1a88dff48ea65
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spelling	oai:doaj.org-article:d92423ff6c9b4f7cadc1a88dff48ea652021-11-06T07:12:56ZRelease of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation1606-97491607-079810.2166/ws.2020.334https://doaj.org/article/d92423ff6c9b4f7cadc1a88dff48ea652021-05-01T00:00:00Zhttp://ws.iwaponline.com/content/21/3/1313https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Nitrogen-containing organic compounds and nitrogenous disinfection by-products (N-DBPs) in drinking water have attracted attention in the field of water treatment. Metabolites released during algae growth contain a variety of organic nitrogen species, which are called N-DBP precursors. The aim of this paper is to elucidate how N-DBP precursors are released under UV radiation, as well as investigate the variations of their chemical properties. The results show that through UV radiation, the physiological metabolism of algal cells was disordered and the properties of their metabolites were changed. The dissolved organic nitrogen (DON) compound concentration increased rapidly from 5.38 at the beginning to 11.11 mg/L after 30 min of radiation, and then increased steadily from 11.11 to 23.71 mg/L during a further 210 min of radiation. Derivation results of the curves for algae and DON concentration variations shows that when 1 × 1010 algal cells were destroyed, 8.31 mg DON was released into the solution during the first 30 min of radiation. Low dose UV radiation brought a slight decline of the specific N-DBP formation potential due to changes in the extracellular organic matter (EOM) structure without destroying the algal cells, which was conducive to controlling the formation potential of N-DBPs. Long-time UV radiation can bring a significant increase in N-DBP formation potential. After 4 hours of ultraviolet radiation, the total formation potential of N-DBPs in the solution increased from about 84.9 μg/L to about 213.5 μg/L, 2.5 times higher than the initial solution. The N-DBP formation potential increases obviously during the first 10–30 min UV radiation, and then decreases slightly in the subsequent 30–240 min radiation. HIGHLIGHTS After ultraviolet radiation, the physiological metabolism of algal cells is disturbed and the metabolic properties are changed.; The concentration of will increase rapidly after 30 min of irradiation, and then steadily during a further 210 min of irradiation.; Under UV irradiation, the total formation potential of N-DBPs in the solution first increases then decreases with time.;Weiliang PanYunpeng CaoRui DengLi GuJian XuChanglong DingIWA Publishingarticlealgae-laden waterconcentrationmetabolitesnitrogenous disinfection by-product (n-dbp) formation potentialreleaseuv radiationWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 3, Pp 1313-1322 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	algae-laden water concentration metabolites nitrogenous disinfection by-product (n-dbp) formation potential release uv radiation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	algae-laden water concentration metabolites nitrogenous disinfection by-product (n-dbp) formation potential release uv radiation Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Weiliang Pan Yunpeng Cao Rui Deng Li Gu Jian Xu Changlong Ding Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
description	Nitrogen-containing organic compounds and nitrogenous disinfection by-products (N-DBPs) in drinking water have attracted attention in the field of water treatment. Metabolites released during algae growth contain a variety of organic nitrogen species, which are called N-DBP precursors. The aim of this paper is to elucidate how N-DBP precursors are released under UV radiation, as well as investigate the variations of their chemical properties. The results show that through UV radiation, the physiological metabolism of algal cells was disordered and the properties of their metabolites were changed. The dissolved organic nitrogen (DON) compound concentration increased rapidly from 5.38 at the beginning to 11.11 mg/L after 30 min of radiation, and then increased steadily from 11.11 to 23.71 mg/L during a further 210 min of radiation. Derivation results of the curves for algae and DON concentration variations shows that when 1 × 1010 algal cells were destroyed, 8.31 mg DON was released into the solution during the first 30 min of radiation. Low dose UV radiation brought a slight decline of the specific N-DBP formation potential due to changes in the extracellular organic matter (EOM) structure without destroying the algal cells, which was conducive to controlling the formation potential of N-DBPs. Long-time UV radiation can bring a significant increase in N-DBP formation potential. After 4 hours of ultraviolet radiation, the total formation potential of N-DBPs in the solution increased from about 84.9 μg/L to about 213.5 μg/L, 2.5 times higher than the initial solution. The N-DBP formation potential increases obviously during the first 10–30 min UV radiation, and then decreases slightly in the subsequent 30–240 min radiation. HIGHLIGHTS After ultraviolet radiation, the physiological metabolism of algal cells is disturbed and the metabolic properties are changed.; The concentration of will increase rapidly after 30 min of irradiation, and then steadily during a further 210 min of irradiation.; Under UV irradiation, the total formation potential of N-DBPs in the solution first increases then decreases with time.;
format	article
author	Weiliang Pan Yunpeng Cao Rui Deng Li Gu Jian Xu Changlong Ding
author_facet	Weiliang Pan Yunpeng Cao Rui Deng Li Gu Jian Xu Changlong Ding
author_sort	Weiliang Pan
title	Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
title_short	Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
title_full	Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
title_fullStr	Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
title_full_unstemmed	Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation
title_sort	release of nitrogenous disinfection by-product precursors in algae-laden water under uv radiation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d92423ff6c9b4f7cadc1a88dff48ea65
work_keys_str_mv	AT weiliangpan releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation AT yunpengcao releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation AT ruideng releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation AT ligu releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation AT jianxu releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation AT changlongding releaseofnitrogenousdisinfectionbyproductprecursorsinalgaeladenwaterunderuvradiation
_version_	1718443823501148160

Release of nitrogenous disinfection by-product precursors in algae-laden water under UV radiation

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