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Yoshinaga N, Tateishi A, Kobayashi Y, Kubo T, Miyakawa H, Satoh K, Numata K. Effect of Oligomers Derived from Biodegradable Polyesters on Eco- and Neurotoxicity. Biomacromolecules 2023; 24:2721-2729. [PMID: 37085155 PMCID: PMC10265658 DOI: 10.1021/acs.biomac.3c00160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/08/2023] [Indexed: 04/23/2023]
Abstract
Biodegradable polymers are eco-friendly materials and have attracted attention for use in a sustainable society because they are not accumulated in the environment. Although the characteristics of biodegradable polymers have been assessed well, the effects of their degradation products have not. Herein, we comprehensively evaluated the chemical toxicities of biodegradable polyester, polycaprolactone (PCL), and synthetic oligocaprolactones (OCLs) with different degrees of polymerization. While the PCL did not show any adverse effects on various organisms, high levels of shorter OCLs and the monomer (1 μg/mL for freshwater microorganisms and 1 mg/mL for marine algae and mammalian cells) damaged the tested organisms, including freshwater microorganisms, marine algae, and mammalian cells, which indicated the toxicities of the degradation products under unnaturally high concentrations. These results highlight the need for a further understanding of the effects of the degradation products resulting from biodegradable polyesters to ensure a genuinely sustainable society.
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Affiliation(s)
- Naoto Yoshinaga
- Biomacromolecule
Research Team, RIKEN Center for Sustainable
Resource Science, Wako-shi, Saitama 351-0198, Japan
- Institute
for Advanced Biosciences, Keio University, Tsuruoka-shi, Yamagata 997-0017, Japan
| | - Ayaka Tateishi
- Biomacromolecule
Research Team, RIKEN Center for Sustainable
Resource Science, Wako-shi, Saitama 351-0198, Japan
| | - Yasuaki Kobayashi
- School
of Materials and Chemical Technology, Tokyo
Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
| | - Tomohiro Kubo
- School
of Materials and Chemical Technology, Tokyo
Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
| | - Hitoshi Miyakawa
- Center
for Bioscience Research and Education, Utsunomiya
University, Utsunomiya, Tochigi 321-8505, Japan
| | - Kotaro Satoh
- School
of Materials and Chemical Technology, Tokyo
Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
| | - Keiji Numata
- Biomacromolecule
Research Team, RIKEN Center for Sustainable
Resource Science, Wako-shi, Saitama 351-0198, Japan
- Institute
for Advanced Biosciences, Keio University, Tsuruoka-shi, Yamagata 997-0017, Japan
- Department
of Material Chemistry, Kyoto University, Kyoto-shi, Kyoto 615-8510, Japan
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Cheng G, Liu H, Dong T, Li Q, Sun M, Lou L. Assessment and prediction of the effect of ageing on the adsorption of nonylphenol in black carbon-sediment systems. J Environ Sci (China) 2021; 102:216-225. [PMID: 33637246 DOI: 10.1016/j.jes.2020.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 06/12/2023]
Abstract
Black carbon (BC) is a promising sediment amendment, as proven by its considerable adsorption capacity for hydrophobic organic pollutants and accessibility, but its reliability when used for the removal of pollutants in natural sediments still needs to be evaluated. For example, the ageing process, resulting in changing of surface physicochemical properties of BC, will decrease the adsorption capacity and performance of BC when applied to sediment pollution control. In this study, how the ageing process and BC proportion affect the adsorption capacity of BC-sediment systems was modelled and quantitatively investigated to predict their adsorption capacity under different ageing times and BC additions. The results showed that the ageing process decreased the adsorption capacity of both BC-sediment systems, due to the blockage of the non-linear adsorption sites of BC. The adsorption capacity of rice straw black carbon (RC)-sediment systems was higher than that of fly ash black carbon (FC)-sediment systems, indicating that RC is more efficient than FC for nonylphenol (NP) pollution control in sediment. The newly established model for the prediction of adsorption capacity fits the experimental data appropriately and yields acceptable predictions, especially when based on parameters from the Freundlich model. However, to fully reflect the influence of the ageing process on BC-sediment systems and make more precise predictions, it is recommended that future work considering more factors and conditions, such as modelling of the correlation between the adsorption capacity and the pore volume or specific surface area of BC, be applied to build an accurate and sound model.
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Affiliation(s)
- Guanghuan Cheng
- Environmental Science, College of Engineering, China Pharmaceutical University, Nanjing 211198, China; Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Han Liu
- Environmental Science, College of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Tailu Dong
- Environmental Science, College of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Qiuyu Li
- Environmental Science, College of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Mingyang Sun
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), School of Environmental Science and Engineering, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China.
| | - Liping Lou
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, Hangzhou 310058, China.
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