Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Characteristics of arsenic elution from sewage sludge
Autore:
Ito, A; Takachi, T; Kitada, K; Aizawa, J; Umita, T;
Indirizzi:
Iwate Univ, Dept Civil & Environm Engn, Morioka, Iwate 0208551, Japan Iwate Univ Morioka Iwate Japan 0208551 ngn, Morioka, Iwate 0208551, Japan
Titolo Testata:
APPLIED ORGANOMETALLIC CHEMISTRY
fascicolo: 4, volume: 15, anno: 2001,
pagine: 266 - 270
SICI:
0268-2605(200104)15:4<266:COAEFS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ION CHROMATOGRAPHY; METALS REMOVAL; HEAVY-METALS; CHEMISTRY; WATERS; PH;
Keywords:
sewage sludge; arsenic elution; forms of dissolved arsenic; HPLC-ICP-MS; Eh-pH diagram of arsenic;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Ito, A Iwate Univ, Dept Civil & Environm Engn, Ueda 4-3-5, Morioka, Iwate 0208551, Japan Iwate Univ Ueda 4-3-5 Morioka Iwate Japan 0208551 te 0208551, Japan
Citazione:
A. Ito et al., "Characteristics of arsenic elution from sewage sludge", APPL ORGAN, 15(4), 2001, pp. 266-270

Abstract

Characteristics of arsenic elution from sewage sludge were studied at different sludge pH values to develop a removal process for arsenic in sewage sludge. Forms of arsenic compounds (arsenious acid (As(III)), arsenic acid (As(V)), monomethylarsonic acid and dimethylarsinic acid) eluted from the sludge were analyzed using high-performance liquid chromatography-inductively, coupled plasma mass spectrometry. It was confirmed that four compounds ofarsenic in the liquid phase separated from the sludge could be clearly classified and directly determined without being interfered with by coexistentmatter dissolved from the sludge. An increase in sludge pH effectively increased the amount of arsenic eluted from the sludge, Although the sludge oxidation-reduction potential was increased by decreasing the sludge pH with sulfuric acid, the elution of arsenic was slight at pH 1. The predominant form of arsenic eluted from the sludge was arsenic acid at sludge pH 5, 7, 9and 11, whereas it was arsenious acid at pH 1, Both monomethylarsonic and dimethylarsinic acids were insignificantly eluted at all of the pH values investigated. The form of arsenic dissolved from the sludge was found to almost correspond with that obtained from the Eh-pH diagram of arsenic in an aqueous system. It was concluded that elution of arsenic from sludge was promoted by increasing sludge pH and the dissolved arsenic existed mainly as arsenic acid at high pH. Copyright (C) 2001 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 07:54:01