GAC removal of organic nitrogen and other DBP precursors

被引：30

作者：

Chiu, Chao-An ^{[1
]}

Westerhoff, Paul ^{[1
]}

Ghosh, Amlan ^{[1
]}

机构：

[1] Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ 85287 USA

来源：

JOURNAL AMERICAN WATER WORKS ASSOCIATION | 2012年 / 104卷 / 07期

关键词：

Activated carbon; Disinfection by-product speciation; Disinfection by-products; Dissolved organic nitrogen; Rapid smallscale column test;

D O I：

10.5942/jawwa.2012.104.0090

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Rapid small-scale column tests (RSSCTs) with granular activated carbon (GAG) were conducted on pretreated surface water samples to evaluate the simultaneous removal of carbonaceous and nitrogenous disinfection by-product (DBP) precursors: dissolved organic carbon (DOG), dissolved organic nitrogen (DON), organics absorbed by ultraviolet light at 254 nm (UV254), and bromide (Br-). Simulated distribution system (SDS) tests were conducted with RSSCT effluent samples throughout natural organic matter breakthrough, and free chlorine was used to evaluate the formation of halogenated carbonaceous DBPs (C-DBPs) and nitrogenous DBPs (N-DBPs). GAG preferentially removed UV254-absorbing material over DOG, which was removed more effectively than DON. Br- was not removed. Consequently, effluent ratios of Br- to DOG and Br- to DON changed during GAG treatment, and the ratio of brominated DBPs to chlorinated DBPs shifted during the GAG breakthrough cycle; brominated DBPs dominated earlier in the breakthrough of DOG. Neither DON nor N-DBP precursors were removed efficiently during GAG treatment.

引用

页码：41 / 42

页数：2

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