Journal of Chemistry
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2022
·
IF 3.241
Yan Jin,Xinyuan Wang,Ya-Ping Dong
The Yellow River is very important for human health and social development in China to require good water quality. This study selected the Ningxia section of the Yellow River as the study area to investigate the water quality variation in 2016–2020. A total of 9 water quality parameters were monitored, and 8 parameters including pH, dissolved oxygen, biological oxygen demand, chemical oxygen demand, total phosphate, fluoride, ammonia-nitrogen, and permanganate index were in the range of Class II standard requirement. Dissolved oxygen concentrations ranged from 7.5 to 9.4 mg/L. However, total nitrogen concentrations in 2018–2020 ranged from 1.87 to 2.8 mg/L to cause the pollution. Both the Nemerow index method and the contamination degree method showed that total nitrogen with high concentration exerted the water pollution. Principal component analysis also proved this. Stricter environmental management strategies for controlling total nitrogen should be taken in the future. The findings provided some useful information for water pollution of the Ningxia section of the Yellow River.
研究领域:
环境科学
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水资源管理
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DOI
高影响因子
Environmental Science-Processes & Impacts
·
2021
·Vol. 23
·期 5
·735-744
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IF 4.238
Yanghui Xiong,Yuan-Bo Wang,De-Sheng Pei
There are two popular methods to measure reactive phosphorus (P) and total P: the GB11893-89 method in China and the 4500-P E method of the APHA in the US. However, their drawbacks, including long reaction time and narrow linear range, cannot satisfy the demand for modern analytic techniques. Here, based on reducing the acidity of the molybdenum blue (MB) reaction, and then stabilizing with EDTA, we have developed a novel method (WH-flags) to quickly measure both reactive P and total P. In the WH-flags method, “W” stands for Wide linear ranges (0–1.4 mg L−1 for reactive P & 0–1.8 mg L−1 for total P), “H” stands for High tolerance of different matrices (it can be adapted to a wide spectrum of samples), “f” is fast reaction time (2 min), “l” is long stabilization (40 min), “a” stands for appropriate recovery rates (89.1–103.2%), “g” is good precision and accuracy (CVs < 5% & Res < 5%) and “s” is small volume of samples (5–10 mL). The WH-flags method showed good linearity (R2 > 0.999). The WH-flags method should have broad application in monitoring P from different aqueous samples in the future.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL MONITORING AND ASSESSMENT
·
2023
·Vol. 195
·期 6
·1-15
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IF 3
Wang Yan,Han Xue,Zhang Jie,Zhou Meng-Xuan,Liu Ai-Lin
Biological effect-based monitoring is essential for predicting or alerting to a possible deterioration in drinking water quality. In the present study, a reporter gene assay based on oxidative stress–mediated Pgst-4::GFP induction in the Caenorhabditis elegans strain VP596 (VP596 assay) was assessed for its applicability in evaluating drinking water safety and quality. This assay was used to measure the oxidative stress response in VP596 worms exposed to six ubiquitous components (As 3+ , Al 3+ , F − , NO 3 − -N, CHCl 3 , and residual chlorine) in drinking water, eight mixtures of these six components designed through orthogonal design, ninety-six unconcentrated water samples from source to tap water in two supply systems, and organic extracts (OEs) of twenty-five selected water samples. Pgst-4::GFP fluorescence was not induced by Al 3+ , F − , NO 3 − -N, and CHCl 3 , and was significantly enhanced by As 3+ and residual chlorine only at concentrations higher than their respective drinking water guideline levels. Pgst-4::GFP induction was not detected in any of the six-component mixtures. Induction of Pgst-4::GFP was observed in 9.4% (3/32) of the source water samples but not in the drinking water samples. However, a notable induction effect was revealed in the three OEs of drinking water, with a relative enrichment factor of 200. These results suggest that the VP596 assay has limited utility for screening drinking water safety by testing unconcentrated water samples; however, it offers a supplemental in vivo tool for prioritizing water samples for an enhanced quality assessment, monitoring pollutant removal performance by drinking water treatment plants, and evaluating water quality in water supplies.
研究领域:
环境科学
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毒理学
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水质评估
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DOI
PubMed
高影响因子
Water
·
2024
·Vol. 16
·期 17
·2531
·
IF 3
Zhenjiang Yang,Daoquan Zhao,Jinxing Gu,Ran Wu,Bianzhi Liu,Guangqing Yu,Pengsheng Dong,Xiaocheng Huang,Ming Li,Guoxi Li
To investigate the toxic and environmental effects of prometryn, a laboratory experiment was performed on coexistent fish and algae. The body weight and length ofCarassius carassius,Microcystis aeruginosa(M. aeruginosa) densities and water quality were measured continuously for 92 days. It was observed that fish growth was significantly inhibited by prometryn. This can be partly attributed to the adverse effects of prometryn on the antioxidant system of fish; the activities of superoxide dismutase (SOD) and catalase (CAT) in crucian carp were significantly inhibited by prometryn. The growth ofM. aeruginosawas greatly inhibited by prometryn (p< 0.05), and the adverse effects of prometryn onM. aeruginosaindirectly impacted water qualities. The body weight and length ofCarassius carassiusfirst increased and then tended to be stable with increasing electrical conductivity (EC) values; their quantified relationship was established based on the Gompertz and Logistic equations (R2= 0.920–0.989). Based on the above results, we concluded that the toxic effects of prometryn can impact the antioxidant system of fish and algae which in turn affects their growth performance, and have an indirect impact on water quality. The application of equations made it realizable to obtain a more detailed interpretation of the processes involved in these biological–abiotic interactions.
研究领域:
环境科学
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毒理学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
·
IF 6.216
Yulei Liu,Lu Wang,Zhuangsong Huang,Xianshi Wang,Xiaodan Zhao,Yuanyuan Ren,Shaofang Sun,Mang Xue,Jingyao Qi,Jun Ma
Indole is a typical fecal odor compound and has negative impact on water quality at low concentrations. Here, the oxidation of indole by ferrate [Fe(VI)] was investigated, in terms of the reaction kinetics, the oxidation products, and the variation of assimilable organic carbon (AOC). The oxidation of indole was pH-dependent (6.0–9.5), and the pH-dependent profile could be well explained by the acid-base equilibrium of Fe(VI). The apparent second-order rate constants (k app ) for indole oxidation with Fe(VI) ranged from 692 ± 26 M −1 s −1 at pH 6.0 to 3.08 ± 0.15 M −1 s −1 at pH 9.5. The results of experiments conducted under real source water background showed that indole could be effectively removed by Fe(VI) from actual polluted waters. After analyzing the reaction pathway, it was found that the initial steps in the oxidation of indole were the hydroxylation of indole to 2,3-dihydroxyindole, followed by the cleavage of N-heterocyclic ring. Formanilide was a major oxidation product in this process, and it is less reactive with Fe(VI) than that of indole. High concentrations of Fe(VI) could effectively oxidize indole in the water and has little impact on the microbiological stability of the treated water. Based on the results, Fe(VI) can be an effective agent for the control of indole in water treatment.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 30
·17627-17634
·
IF 3.119
Shoufeng Tang,Jiachen Tang,Deling Yuan,Zetao Wang,Yating Zhang,Yandi Rao
Humic substances are polyelectrolytic macromolecules; their presence in water leads to many environmental problems without effective treatment. In this work, the elimination of humic acid (HA), a typical humic substance, has been examined through ultraviolet (UV) activation systems in the presence of peroxydisulfate (PDS) and peroxymonosulfate (PMS), respectively. The results indicated that 92.9% and 97.1% of HA were eliminated with rate constants of 0.0328 ± 0.0006 and 0.0436 ± 0.0011 min−1 with 180 and 60 min treatment times at pH 6 and 3 when adding 3 and 1 mmol L−1 oxidant during UV/PDS and UV/PMS, respectively; the corresponding electric energies per order were 0.0287 and 0.0131 kW h m−3. The HA removal was systematically investigated by varying different reaction parameters, including radical scavengers, persulphate dose, solution pH, and initial HA concentration, and by addition of various common ions. Moreover, the decomposition details were identified through the changes in the dissolved organic carbon, unique UV absorbances, and UV spectroscopic ratios. Furthermore, the destruction mechanism was verified by fluorescence spectroscopy, demonstrating that the HA structure was decomposed to small molecular fractions in the two UV/persulphate systems. In addition, the purification of HA by the two UV/persulphate processes was assessed in actual water matrices.
研究领域:
环境科学
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水处理技术
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 26
·27063-27072
·
IF 2.914
Wang Mengyun,Wang Daiyao,Qiu Shiyi,Xiao Junyang,Cai Huahua,Zou Jing
In this study, a sensitive and low-cost multi-wavelength spectrophotometric method for the determination of hydrogen peroxide (H 2 O 2 ) in water was established. The method was based on the oxidative coloration of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) via Fenton reaction, which resulted in the formation of green radical (ABTS •+ ) with absorbance at four different wavelengths (i.e., 415 nm, 650 nm, 732 nm, and 820 nm). Under the optimized conditions ( C ABTS = 2.0 mM, C Fe 2+ = 1.0 mM, pH = 2.60 ± 0.02, and reaction time ( t ) = 1 min), the absorbance of the generated ABTS •+ at 415 nm, 650 nm, 732 nm, and 820 nm were well linear with H 2 O 2 concentrations in the range of 0–40 μM ( R 2 > 0.999) and the sensitivities of the proposed Fenton-ABTS method were calculated as 4.19 × 10 4 M –1 cm –1 ,1.73 × 10 4 M –1 cm –1 , 2.18 × 10 4 M –1 cm –1 , and 1.96 × 10 4 M –1 cm –1 , respectively. Meanwhile, the detection limits of the Fenton-ABTS method at 415 nm, 650 nm, 732 nm, and 820 nm were respectively calculated to be 0.18 μM, 0.12 μM, 0.10 μM, and 0.11 μM. The absorbance of the generated ABTS •+ in ultrapure water, underground water, and reservoir water was quite stable within 30 min. Moreover, the proposed Fenton-ABTS method could be used for monitoring the variations of H 2 O 2 concentration during the oxidative decolorization of RhB in alkali-activated H 2 O 2 system.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
WATER RESEARCH
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2024
·
IF 11.4
Weinan Feng,Wencheng Ma,Dan Zhong
Chloramine is the second most popular disinfectant and is widely used in the disinfection of drinking water. For chloramine disinfection, some standards require the total chlorine concentration to be maintained in an appropriate range in the water distribution system. Therefore, exploring the mechanism of chloramine decay and deriving an accurate chloramine decay model helps to optimize the disinfection process and ensure water quality safety. This paper proposed a locally enhanced mixed-order(LEM) model consisting of the first order model and the mixed order model to describe chloramine auto-decomposition and decays caused by other reactions respectively. Via proving the parameter a and k 2 related to temperatures instead of initial chloramine concentration, the model had been further simplified. Nine chloramine decay experiments with different initial chloramine concentrations and temperatures were designed and carried out to evaluate the new model performance for chloramine decay simulation. The research results showed that the simplified LEM model could simulate the whole process of chloramine decay well. Its accuracy evaluation indexes (R 2 and SSE) were better than that obtained from the first order model and the mixed order model. This paper proposed a simple and accurate method to simulate the process of chloramine decay and had a guiding significance for water quality safety assurance.
研究领域:
环境科学
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水处理工程
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公共卫生
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DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Biran Zhu,Ziniu Wang,Lei Lei,Yongyong Guo,Jian Han,Bingsheng Zhou
Cadmium (Cd), a ubiquitous environmental hazardous heavy metal, poses a significant threat to the health of aquatic organisms, including teleosts. Although the toxic profile of Cd is well recognized, little is known regarding the overall view of toxic responses to varying aquatic environmental parameters (e.g., water hardness) at an individual level. Herein, differences in water hardness were partially mimicked by adjusting Ca 2+ levels in E3 medium. As an in vivo model, zebrafish embryos were exposed to variable Ca 2+ levels (NV, normal Ca 2+ ; LV, low Ca 2+ ; HV, high Ca 2+ ) alone or combined with 30.7 µg/L Cd 2+ (NC, LC, and HC, respectively) until 144 hr post-fertilization. The genome-wide transcriptome revealed differentially expressed genes between groups. Functional enrichment analysis found that biological processes related to metabolism, particularly lipid metabolism, were significantly disrupted in NC and LC treatments, while a remission was observed in the HC group. Biochemical assays confirmed that the decrease in Ca 2+ enhanced synthesis, inhibited mobilization and increased the storage of lipids in Cd 2+ treatments. This study suggests that the toxic effect of Cd on biological pathways will be influenced by Ca 2+ , which will improve the toxicological understanding and facilitate accurate assessment of Cd.
研究领域:
毒理学
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环境科学
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分子生物学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Jianjun Du,Hong Du,Xiangyu Li,Jiangli Fan,Xiaojun Peng
Aniline, a typical example of arylamines, is one of most important raw materials in many industries. However, arylamine-related pollution in waters threatens the public health and environment along with their wide applications. In this work, a simple, fast, and convenient colorimetric sensing system was presented for the arylamine (e.g. aniline) recognition in aqueous media. The system was presented using diazonium salt (DS) decorated gold nanoparticles (AuNPs), based on the classic coupling reaction of arylamine with diazonium salt. DS-AuNPs showed an excellent response and a good sensitivity to aniline, and the limit of detection reached 0.5 μM for aniline in this work. There was a good linear relationship (R2 = 0.997) between the values of A640 nm/520 nm and aniline concentrations over a range of 5–60 μM, which covered the Chinese standard of the maximum permissible pollutant emission concentration for aniline. The introduction of arylamine (e.g. aniline) caused a rapid and obvious red-to-blue color change, so the arylamine-polluted water could be qualitatively recognized by our naked-eyes and quantitatively measured by absorbance changes.
研究领域:
环境科学
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分析化学
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材料科学
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DOI
高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Tingting Fang,Zuotao Zhang,Hui Wang,Matt Rogers,Qijia Cui
The decay and distribution of bacterial pathogens in water is an important information for the health risk assessment to guide water safety management, and suspended algae might affect bacterial pathogens in water. This study established microcosms to investigate the effects of algae-related factors on the representative indicators and opportunistic pathogen species in water. We found that suspended algae increased the persistence of targeted species by 1-2 orders of magnitude of concentrations compared to microcosms without algae; and the effect of algae on microbial survival was affected by water nutrient levels (i.e., carbon, nitrogen and phosphorus), as the increased microbial persistence were correlated to the increased algae concentrations with more nutrient supplies. Moreover, decay and distribution profiles of representative species were determined. The three opportunistic pathogen species ( Pseudomonas aeruginosa, Aeromonas hydrophila and Staphylococcus aureus ) showed lower decay rates (0.82–0.98/day, 0.76–0.98/day, 0.63–0.87/day) largely affected by algae-related factors, while the enteric species ( Escherichia coli and Enterococcus faecalis ) had higher decay rates (0.94–1.31/day, 0.89–1.21/day) with little association with algae, indicating the propensity for attachment to algae is an important parameter in microbial fate. Together results suggest suspended algae played an evident role in the decay and distribution of bacterial pathogens, providing important implications regarding microbial safety in recreational water.
研究领域:
环境科学
·
微生物学
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DOI
PubMed
高影响因子
AQUACULTURE
·
2024
·
IF 3.9
Juan-ying Li,Yuxiao Tong,Qi Gong,Yaxiong Tian,Yanhao Yang,Luting Wen,Hongjie Chen,Qian Wang
Eastern China is an important area for aquaculture, but the aquaculture environment, as well as the aquatic product quality, are threatened by environmental pollutants such as polycyclic aromatic hydrocarbon (PAHs) and pyrethroid pesticides (PYRs). A three-month monitoring program for PAHs and PYRs throughout the whole culture processes of the shrimp Penaeus vanmamei was carried out. Specifically, concentrations of PAHs and PYRs ranged from 339 ± 19.5–631 ± 75.6 ng·L −1 and 65.3 ± 6.74–93.5 ± 10.8 ng·L −1 in water, 183 ± 33.8–369 ± 25.1 ng·g −1 dw and 441 ± 132–521 ± 62.8 ng·g −1 dw in sediments, while 416 ± 84.3–646 ± 19.7 and 483 ± 23.3–513 ± 22.1 ng·g −1 dw in suspended solids. Mean concentrations of PAHs and PYRs in the adult shrimp were 634 ± 82.3 ng·g −1 ww and 665 ± 58.1 ng·g −1 ww, respectively. A health threat would arise if men consume more than 28.8 g and women consume more than 24.4 g each day. PAHs in the aquaculture environment were generally from the influent water and rainfall, while PYRs were mainly introduced by feed. After entering the culture environment, PAHs primarily increased the water load, leading to more significant bioaccumulation of the shrimp from the water phase (72–95 %). For PYRs, the main sources were feed (44.4 %) and influent water (20.6 %), and they were accumulated in shrimp through feed assimilation directly (15.0 %–32.0 %). Additionally, feed waste containing PYRs increased the contamination burden of sediments and suspended solids, leading to bioaccumulation through assimilation (4.00 %–15.0 %) as well. Although the contribution of influent water to PYRs in the culture environment was lower than that of feed, the contribution of aqueous exposure to the enrichment of PYRs in the shrimp was higher (53.0 %–81.0 %) than that of food (feed, sediments, and suspended solid) intake (19.0 %–47.0 %). The hydrophobicity of PYRs led to an easier bioaccumulation from freely dissolved phase to biota. Therefore, it is important to pay attention to the water quality during the whole culture period, as well as feed quality, to ultimately improve the quality of aquaculture products. In summary, different pollutants in the aquaculture environment and products were from different sources and exposure pathways. Water quality monitoring and improvement are more efficient in decreasing PAHs in the shrimp, while PYRs reduction should be assisted with feed quality control.
研究领域:
环境科学
·
水产养殖学
·
生态毒理学
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DOI
高影响因子
危险品化学品经营许可证（带存储）