Effect of oxidants on microalgal flocculation

A. Sukenik; B. Teltch; A. W. Wachs; G. Shelef; I. Nir; D. Levanon

doi:10.1016/0043-1354(87)90061-3

Effect of oxidants on microalgal flocculation

A. Sukenik, B. Teltch, A. W. Wachs, G. Shelef, I. Nir, D. Levanon

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of chlorine, ozone and chlorine dioxide on Scenedesmus sp. cultures were studied. Algal cell viability and chlorophyll concentration decreased, and the concentration of dissolved organic substances increased with increasing applied oxidant concentration. Pretreatment with chlorine dioxide (1, 3 or 5 mg l^-1) or ozone (2.6, 4.6 or 8.1 mg l^-1) on algal cultures enhanced algal flocculation with alum, while prechlorination with 10 or 20 mg l^-1 increased the required dosage of alum by 15%. Scanning electron micrographs of oxidized cells revealed drastically adverse effects upon the cell surface architecture: in addition to the oxidation of noncellular organic materials, the oxidants damaged both cell surface structures and intracellular components. A model explaining the effects of the different oxidants on microalgal flocculation is suggested.

Original language	English
Pages (from-to)	533-539
Number of pages	7
Journal	Water Research
Volume	21
Issue number	5
DOIs	https://doi.org/10.1016/0043-1354(87)90061-3
State	Published - May 1987
Externally published	Yes

Keywords

algal cell surface architecture
chlorine
chlorine dioxide
microalgal flocculation
ozone
scanning electron microscopy
Scenedesmus sp.

ASJC Scopus subject areas

Environmental Engineering
Civil and Structural Engineering
Ecological Modeling
Water Science and Technology
Waste Management and Disposal
Pollution

Access to Document

10.1016/0043-1354(87)90061-3

Cite this

@article{cccef383dbc34ad4b28e57932768a73b,

title = "Effect of oxidants on microalgal flocculation",

abstract = "The effects of chlorine, ozone and chlorine dioxide on Scenedesmus sp. cultures were studied. Algal cell viability and chlorophyll concentration decreased, and the concentration of dissolved organic substances increased with increasing applied oxidant concentration. Pretreatment with chlorine dioxide (1, 3 or 5 mg l-1) or ozone (2.6, 4.6 or 8.1 mg l-1) on algal cultures enhanced algal flocculation with alum, while prechlorination with 10 or 20 mg l-1 increased the required dosage of alum by 15%. Scanning electron micrographs of oxidized cells revealed drastically adverse effects upon the cell surface architecture: in addition to the oxidation of noncellular organic materials, the oxidants damaged both cell surface structures and intracellular components. A model explaining the effects of the different oxidants on microalgal flocculation is suggested.",

keywords = "algal cell surface architecture, chlorine, chlorine dioxide, microalgal flocculation, ozone, scanning electron microscopy, Scenedesmus sp.",

author = "A. Sukenik and B. Teltch and Wachs, {A. W.} and G. Shelef and I. Nir and D. Levanon",

year = "1987",

month = may,

doi = "10.1016/0043-1354(87)90061-3",

language = "English",

volume = "21",

pages = "533--539",

journal = "Water Research",

issn = "0043-1354",

publisher = "Elsevier",

number = "5",

}

TY - JOUR

T1 - Effect of oxidants on microalgal flocculation

AU - Sukenik, A.

AU - Teltch, B.

AU - Wachs, A. W.

AU - Shelef, G.

AU - Nir, I.

AU - Levanon, D.

PY - 1987/5

Y1 - 1987/5

N2 - The effects of chlorine, ozone and chlorine dioxide on Scenedesmus sp. cultures were studied. Algal cell viability and chlorophyll concentration decreased, and the concentration of dissolved organic substances increased with increasing applied oxidant concentration. Pretreatment with chlorine dioxide (1, 3 or 5 mg l-1) or ozone (2.6, 4.6 or 8.1 mg l-1) on algal cultures enhanced algal flocculation with alum, while prechlorination with 10 or 20 mg l-1 increased the required dosage of alum by 15%. Scanning electron micrographs of oxidized cells revealed drastically adverse effects upon the cell surface architecture: in addition to the oxidation of noncellular organic materials, the oxidants damaged both cell surface structures and intracellular components. A model explaining the effects of the different oxidants on microalgal flocculation is suggested.

AB - The effects of chlorine, ozone and chlorine dioxide on Scenedesmus sp. cultures were studied. Algal cell viability and chlorophyll concentration decreased, and the concentration of dissolved organic substances increased with increasing applied oxidant concentration. Pretreatment with chlorine dioxide (1, 3 or 5 mg l-1) or ozone (2.6, 4.6 or 8.1 mg l-1) on algal cultures enhanced algal flocculation with alum, while prechlorination with 10 or 20 mg l-1 increased the required dosage of alum by 15%. Scanning electron micrographs of oxidized cells revealed drastically adverse effects upon the cell surface architecture: in addition to the oxidation of noncellular organic materials, the oxidants damaged both cell surface structures and intracellular components. A model explaining the effects of the different oxidants on microalgal flocculation is suggested.

KW - algal cell surface architecture

KW - chlorine

KW - chlorine dioxide

KW - microalgal flocculation

KW - ozone

KW - scanning electron microscopy

KW - Scenedesmus sp.

UR - http://www.scopus.com/inward/record.url?scp=0023346130&partnerID=8YFLogxK

U2 - 10.1016/0043-1354(87)90061-3

DO - 10.1016/0043-1354(87)90061-3

M3 - Article

AN - SCOPUS:0023346130

SN - 0043-1354

VL - 21

SP - 533

EP - 539

JO - Water Research

JF - Water Research

IS - 5

ER -

Effect of oxidants on microalgal flocculation

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this