PMID- 33418294
OWN - NLM
STAT- MEDLINE
DCOM- 20210531
LR  - 20210531
IS  - 1873-3336 (Electronic)
IS  - 0304-3894 (Linking)
VI  - 409
DP  - 2021 May 5
TI  - Hydrophobic modifications of hydroxyethyl cellulose polymers: Their influence on 
      the acute toxicity to aquatic biota.
PG  - 124966
LID - S0304-3894(20)32957-5 [pii]
LID - 10.1016/j.jhazmat.2020.124966 [doi]
AB  - The hydrophobic substitution (HS) of cationic cellulose derivatives may be tuned, 
      promoting their efficiency. This work studied the influence of HS on the acute 
      ecotoxicity of quaternized hydroxyethyl cellulose polymers (SL) to aquatic biota. 
      The ecotoxicity of four SL with different HS (SL-5, SL-30, SL-60, SL-100) was 
      assessed for seven species: Vibrio fischeri, Raphidocelis subcapitata, Chlorella 
      vulgaris, Daphnia magna, Brachionus calyciflorus, Heterocypris incongruens, and 
      Danio rerio. The computed median effective concentrations were used to derive 
      hazard concentrations, by using species sensitive distribution curves. All SL 
      suspensions were characterized for particle size, zeta potential and rheological 
      properties. Results indicated instability of the SL in suspension due to their 
      relatively low zeta potential. Raphidocelis subcapitata, C. vulgaris and B. 
      calyciflorus were the most sensitive to the four SL, suggesting that exposure to 
      these compounds may imbalance the lowest trophic levels. Also, HS influenced the 
      toxicity of SL, with the lowest HS (SL-5) revealing lower ecotoxicity. The 
      maximum acceptable concentrations were 14.0, 2.9, 3.9 and 1.4 mg L(-1) for SL-5, 
      SL-30, SL-60, and SL-100, respectively. Accordingly, SL-5 is suggested as the 
      eco-friendliest and is recommended to be used in the production of care products, 
      in detriment of the other three tested variants.
CI  - Copyright (c) 2020 Elsevier B.V. All rights reserved.
FAU - Simoes, Anabela M
AU  - Simoes AM
AD  - CESAM & Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; 
      CQC, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, 
      Portugal.
FAU - Venancio, C
AU  - Venancio C
AD  - University of Coimbra, Centre for Functional Ecology, Department of Life 
      Sciences, Calcada Martim de Freitas, 3000-456 Coimbra, Portugal.
FAU - Alves, Luis
AU  - Alves L
AD  - University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Silvio 
      Lima, Polo II, PT, 3030-790 Coimbra, Portugal.
FAU - Antunes, Filipe E
AU  - Antunes FE
AD  - CQC, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, 
      Portugal.
FAU - Lopes, Isabel
AU  - Lopes I
AD  - CESAM & Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal. 
      Electronic address: ilopes@ua.pt.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20201226
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 0 (Polymers)
RN  - 0 (Water Pollutants, Chemical)
RN  - 9004-34-6 (Cellulose)
SB  - IM
MH  - Aliivibrio fischeri
MH  - Animals
MH  - Aquatic Organisms
MH  - Biota
MH  - Cellulose/toxicity
MH  - *Chlorella vulgaris
MH  - Daphnia
MH  - Polymers/toxicity
MH  - *Water Pollutants, Chemical/toxicity
OTO - NOTNLM
OT  - Aquatic toxicity
OT  - Cationic cellulose derivatives
OT  - Hydrophobic substitution
OT  - Rational design
EDAT- 2021/01/09 06:00
MHDA- 2021/06/01 06:00
CRDT- 2021/01/08 20:17
PHST- 2020/08/07 00:00 [received]
PHST- 2020/12/18 00:00 [revised]
PHST- 2020/12/23 00:00 [accepted]
PHST- 2021/01/09 06:00 [pubmed]
PHST- 2021/06/01 06:00 [medline]
PHST- 2021/01/08 20:17 [entrez]
AID - S0304-3894(20)32957-5 [pii]
AID - 10.1016/j.jhazmat.2020.124966 [doi]
PST - ppublish
SO  - J Hazard Mater. 2021 May 5;409:124966. doi: 10.1016/j.jhazmat.2020.124966. Epub 
      2020 Dec 26.