Toxicity of 10 organic micropollutants and their mixture: Implications for aquatic risk assessment

Shao, Ying; Chen, Zhongli; Hollert, Henner; Zhou, Shan; Deutschmann, Björn; Seiler, Thomas‐Benjamin

doi:10.1016/j.scitotenv.2019.02.047

Cited by 115 publications

(57 citation statements)

References 89 publications

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“…DOC is a major concern in urban river pollution, which includes thousands of anthropogenic pollutants [30]. These increasing anthropogenic organic matters could arise the histological hazards to the fish and other aquatic organisms, including damages on their gills, thyroid, haematopoietic tissue, and peripheral blood cells in the water bodies [31].…”

Section: Discussionmentioning

confidence: 99%

Linking biological toxicity and the spectral characteristics of contamination in seriously polluted urban rivers

et al. 2019

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Background: Urban river pollution risks to environments and human health are emerging as a serious concern worldwide. With the aim to achieve the health of urban river ecosystem, numerous monitoring programs have been implemented to investigate the spectral characteristics of contamination. While due to the complexity of aquatic pollutants, the linkages between harmful effects and the spectral characteristics of contamination are still a major challenge for capturing main threats to urban aquatic environments. To establish these linkages, surface water (SW), sediment pore water (SDPW), and riparian soil pore water (SPW) were collected from five sites of the seriously polluted Qingshui Stream, China. The water-dissolved organic carbon (DOC), total nitrogen (TN), total phosphate (TP), fluorescence excitation-emission matrix, and specific ultraviolet absorbance were applied to analyze the spectral characteristics of urban river contamination. The Photobacterium phosphorem 502 was used to test the acute toxicity of the samples. Finally, the correlations between acute toxicity and concentrations of DOC, TN, TP, and the spectral characteristics were explored. Results: The concentrations of DOC, TN, and TP in various samples amounted from 11.41 ± 2.31 to 3844.67 ± 87.80 mg/L, from 1.96 ± 0.06 to 906.23 ± 26.01 mg/L and from 0.06 ± 0.01 to 101.00 ± 8.29 mg/L, respectively. The florescence index (FI) amounted from 1.54 to 3.14, the biological index (BIX) were between 0.94 and 1.57. The distribution patterns of specific ultraviolet absorbance at 254 nm (SUVA 254) showed that the highest aromaticity and hydrophobicity were found in SDPW and the lowest ones were in SW. All samples showed significantly inhibition on luminescent bacteria. Particularly, the highest acute toxicity was found in site 1 with an EC 50 value of 6.023-fold dilution for the raw SDPW sample. In addition, the highest fluorescence intensity was also observed from SDPW of site 1. Conclusions: Tryptophan-like and protein-like substances could be important DOC fractions contributing remarkably to the acute toxicity in the seriously polluted river. In addition, the significant reduction on acute toxicity was found with the treatment of surface water flow constructed wetland, revealing that constructed wetland could be an effective approach for toxicant degradation. These observations are useful for water treatments, and meaningful for urban sustainable development.

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Section: Discussionmentioning

confidence: 99%

Linking biological toxicity and the spectral characteristics of contamination in seriously polluted urban rivers

et al. 2019

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“…The ecological risks of the detected emerging contaminants were assessed based on the risk quotient (RQ) method (Sanderson et al, 2003;Shao et al, 2019). The RQ value can be calculated by the ratio of the predicted environmental concentration (PEC) or measured environmental concentration (MEC) of the pollutant to the predicted no-effect concentration (PNEC), as shown in Eq.…”

Section: Ecological Risk Assessmentmentioning

confidence: 99%

“…When PNEC data was not available, effective concentration for 50% of test organism (EC 50 ) or lethal concentration for 50% of test organism (LC 50 ) was used to calculate the PNEC value, as shown in Eq. (10) (Shao et al, 2019).…”

Section: Ecological Risk Assessmentmentioning

confidence: 99%

“…In terms of risk assessment of these emerging contaminants in water system, previous studies (Guruge et al, 2019;Li et al, 2019;Shao et al, 2019) mainly focused on their toxicity to aquatic organisms such as typically fish, algae, and daphnia. While their risk to human health in water reclamation and reuse system have rarely been studied and reported, which may be resulted from the challenges to detect wide ranges of emerging contaminants with low concentrations and determine the assessment procedure, toxicity data and exposure parameters (Ma et al, 2018;USEPA, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Occurrence and risk assessment of emerging contaminants in a water reclamation and ecological reuse project

Lin

Keller

et al. 2020

Science of The Total Environment

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Water reclamation and ecological reuse is gradually becoming a popular solution to address the high pollutant loads and insufficient ecological flow of many urban rivers. However, emerging contaminants in water reuse system and associated human health and ecological risks need to be assessed. This study determined the occurrence and human health and ecological risk assessments of 35 emerging contaminants during one year, including 5 types of persistent organic pollutants (POPs), 5 pharmaceutical and personal care products (PPCPs), 7 endocrine disrupting chemicals (EDCs) and 18 disinfection by-products (DBPs), in a wastewater treatment plant (WWTP) and receiving rivers, as well as an unimpacted river for comparison. Results showed that most of PPCPs and EDCs, especially antibiotics, triclosan, estrogens and bisphenol A, occurred frequently at relatively high concentrations, and they were removed from 20.5% to 88.7% with a mean of 58.9% via WWTP. The highest potential noncarcinogenic and carcinogenic risks in different reuse scenarios were assessed using maximal detected concentrations, all below the acceptable risk limits, with the highest total combined risk value of 9.21 × 10 −9 and 9.98 × 10 −7 , respectively. Ecological risk assessment was conducted using risk quotient (RQ) method and indicated that several PPCPs, EDCs and haloacetonitriles (HANs) pose high risk (RQ N 1) to aquatic ecology in the rivers, with the highest RQ up to 83.8. The study suggested that ecological risks need to be urgently addressed by updating and optimizing the process in WWTPs to strengthen the removal efficiencies of emerging contaminants.

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“…Awareness concerning the spread of micropollutants in water bodies has been raised in many countries [1] due to their toxic effects on ecological systems [2]. Additionally, these pollutants can infiltrate into reservoirs of drinking water in several ways resulting in public health concerns [3].…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Laccase in Alginate Beads

Varga¹,

Meiczinger²,

Somogyi³

2019

Hung. J. Ind. Chem.

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The elimination or degradation of micropollutants from wastewater is becoming ever more important nowadays. Using oxidoreductase enzymes to treat different micropollutants seems a promising solution. However, the viability of the process is highly dependent on the availability and stability of the applied enzymes. In order to improve the stability and provide faster reaction rates, enzymes can be immobilized in various carriers. Properties such as simple production, easy retention and biodegradable carrier material are advantageous, e.g. entrapping laccase in alginate beads. This paper shows the results of the preparation and characterization of immobilized laccase entrapped in calcium alginate beads. The technique of adding a mixture of sodium alginate and laccase dropwise into calcium chloride has been applied, improved and standardized to produce laccase-containing beads of uniform size and activity. For the purpose of characterization, a widely used substrate, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt, was used to evaluate the performance of the laccase-containing alginate beads. In addition to the characterization of the laccase-containing alginate beads, the enzyme kinetic constants (K M = 26.43 µM, Vmax = 0.23 µM/min) were determined. The reduction in the activity during storage has been described by a decay constant (0.26 d −1) that provides information concerning the design constraints of the process. Results will be used to test the method in terms of the removal of organic micropollutants in continuous systems.

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Toxicity of 10 organic micropollutants and their mixture: Implications for aquatic risk assessment

Cited by 115 publications

References 89 publications

Linking biological toxicity and the spectral characteristics of contamination in seriously polluted urban rivers

Linking biological toxicity and the spectral characteristics of contamination in seriously polluted urban rivers

Occurrence and risk assessment of emerging contaminants in a water reclamation and ecological reuse project

Immobilization of Laccase in Alginate Beads

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