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  • 1
    Language: English
    In: Journal of Cleaner Production, 20 October 2018, Vol.199, pp.112-120
    Description: Only little information is available on combined effects of abiotic environmental factors on algal arsenate ( ) metabolic biokinetics. Using the Taguchi statistical method, we investigated four environmental factors including , nitrate (N), orthophosphate (P) and pH for their combined effects on algal growth and arsenic ( ) uptake but also extracellular adsorption of as well as release from dead algal cells. Results showed that an increase of N facilitated growth and thus was the principal factor for the algal maximum specific growth rate ( ). P was vital to bioconcentration factor (BCF) and partition coefficients (Log ) released from deal algal cells. impacted the extracellular adsorption onto the algal cells, which thereby increased with increasing initial level. The initial pH had an imperative effect on the uptake ( ) and release rate ( ) from the dead cells. The optimum conditions on metabolic biokinetics were N at 10.0 mg L for , P at 0.02 mg L for Log and BCF, at 10.0 μM for extracellular adsorption, and pH at 10 for , BCF and extracellular adsorption, but pH at 6 for . Collectively, the condition of low P, high N and alkaline pH level was favorable to accumulation rate of living cells and restrictive to release rate from dead cells of . The obtained information can pave a road for extensive understanding on efficient utilization of bioremediation of algae in practical environment.
    Keywords: Algal Bioremediation ; Accumulation ; Release ; Dead Algae ; Taguchi ; Engineering
    ISSN: 0959-6526
    E-ISSN: 1879-1786
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