Removal and biodegradation of nonylphenol by immobilized Chlorella vulgaris

Q. T. Gao; Y. S. Wong; N. F.Y. Tam

doi:10.1016/j.biortech.2011.08.070

Removal and biodegradation of nonylphenol by immobilized Chlorella vulgaris

Q. T. Gao, Y. S. Wong, N. F.Y. Tam

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

61 Citations (Scopus)

Abstract

The removal and biodegradation of nonylphenol (NP) by alginate-immobilized cells of Chlorella vulgaris were compared with their respective free cultures. The effects of four cell densities of 10⁴ per algal bead were investigated, as were the four algal bead concentrations, with regard to the removal and biodegradation of NP. Although immobilization significantly decreased the growth rate and NP's biodegradation efficiency of C. vulgaris, NP removal over a short period was enhanced. The NP removal mechanism by immobilized cells was similar to that by free cells, including adsorption onto alginate matrix and algal cells, absorption within cells and cellular biodegradation. The optimal cell density and bead concentration for the removal and biodegradation of NP was 50-100×10⁴cells algal bead^-1 and 2-4beadsml^-1 of wastewater, respectively. These results demonstrated that immobilized C. vulgaris cells under optimal biomass and photoautotrophic conditions are effective in removing NP from contaminated water.

Original language	English
Pages (from-to)	10230-10238
Number of pages	9
Journal	Bioresource Technology
Volume	102
Issue number	22
DOIs	https://doi.org/10.1016/j.biortech.2011.08.070
Publication status	Published - Nov 2011
Externally published	Yes

Keywords

Alginate
Bead concentration
Chlorella
Microalgae
Nonylphenol

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2011.08.070

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@article{3347ff7bf6ec464caa55258df4797552,

title = "Removal and biodegradation of nonylphenol by immobilized Chlorella vulgaris",

abstract = "The removal and biodegradation of nonylphenol (NP) by alginate-immobilized cells of Chlorella vulgaris were compared with their respective free cultures. The effects of four cell densities of 104 per algal bead were investigated, as were the four algal bead concentrations, with regard to the removal and biodegradation of NP. Although immobilization significantly decreased the growth rate and NP's biodegradation efficiency of C. vulgaris, NP removal over a short period was enhanced. The NP removal mechanism by immobilized cells was similar to that by free cells, including adsorption onto alginate matrix and algal cells, absorption within cells and cellular biodegradation. The optimal cell density and bead concentration for the removal and biodegradation of NP was 50-100×104cells algal bead-1 and 2-4beadsml-1 of wastewater, respectively. These results demonstrated that immobilized C. vulgaris cells under optimal biomass and photoautotrophic conditions are effective in removing NP from contaminated water.",

keywords = "Alginate, Bead concentration, Chlorella, Microalgae, Nonylphenol",

author = "Gao, {Q. T.} and Wong, {Y. S.} and Tam, {N. F.Y.}",

note = "Funding Information: The work described in this paper was supported by the Areas of Excellence Scheme established under UGC, HKSAR (Project No. AoE/p-04/2004).",

year = "2011",

month = nov,

doi = "10.1016/j.biortech.2011.08.070",

language = "English",

volume = "102",

pages = "10230--10238",

number = "22",

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TY - JOUR

T1 - Removal and biodegradation of nonylphenol by immobilized Chlorella vulgaris

AU - Gao, Q. T.

AU - Wong, Y. S.

AU - Tam, N. F.Y.

N1 - Funding Information: The work described in this paper was supported by the Areas of Excellence Scheme established under UGC, HKSAR (Project No. AoE/p-04/2004).

PY - 2011/11

Y1 - 2011/11

N2 - The removal and biodegradation of nonylphenol (NP) by alginate-immobilized cells of Chlorella vulgaris were compared with their respective free cultures. The effects of four cell densities of 104 per algal bead were investigated, as were the four algal bead concentrations, with regard to the removal and biodegradation of NP. Although immobilization significantly decreased the growth rate and NP's biodegradation efficiency of C. vulgaris, NP removal over a short period was enhanced. The NP removal mechanism by immobilized cells was similar to that by free cells, including adsorption onto alginate matrix and algal cells, absorption within cells and cellular biodegradation. The optimal cell density and bead concentration for the removal and biodegradation of NP was 50-100×104cells algal bead-1 and 2-4beadsml-1 of wastewater, respectively. These results demonstrated that immobilized C. vulgaris cells under optimal biomass and photoautotrophic conditions are effective in removing NP from contaminated water.

AB - The removal and biodegradation of nonylphenol (NP) by alginate-immobilized cells of Chlorella vulgaris were compared with their respective free cultures. The effects of four cell densities of 104 per algal bead were investigated, as were the four algal bead concentrations, with regard to the removal and biodegradation of NP. Although immobilization significantly decreased the growth rate and NP's biodegradation efficiency of C. vulgaris, NP removal over a short period was enhanced. The NP removal mechanism by immobilized cells was similar to that by free cells, including adsorption onto alginate matrix and algal cells, absorption within cells and cellular biodegradation. The optimal cell density and bead concentration for the removal and biodegradation of NP was 50-100×104cells algal bead-1 and 2-4beadsml-1 of wastewater, respectively. These results demonstrated that immobilized C. vulgaris cells under optimal biomass and photoautotrophic conditions are effective in removing NP from contaminated water.

KW - Alginate

KW - Bead concentration

KW - Chlorella

KW - Microalgae

KW - Nonylphenol

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U2 - 10.1016/j.biortech.2011.08.070

DO - 10.1016/j.biortech.2011.08.070

M3 - Article

C2 - 21944284

AN - SCOPUS:80054834283

SN - 0960-8524

VL - 102

SP - 10230

EP - 10238

JO - Bioresource Technology

JF - Bioresource Technology

IS - 22

ER -

Removal and biodegradation of nonylphenol by immobilized Chlorella vulgaris

Abstract

Keywords

UN SDGs

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