Chemosphere最新文献_第7页

Considering safe and sustainable by design alternatives–Environmental hazards of an agriculture nano-enabled pesticide to non-target species 考虑安全和可持续的设计替代品 - 农业纳米农药对非目标物种的环境危害。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143582

Nanopesticides (Npes) offer improved efficacy compared to their conventional forms while reducing the usage/application rates, hence being more sustainable options. However, there is still a knowledge gap on the Npes environmental impacts. To support the safety of nano-enabled pesticides, the present study aimed at assessing the toxicity of the commercial Npe NUCOP-M and the active substance copper oxychloride, using the ecotoxicological soil model Enchytraeus crypticus and LUFA 2.2 soil. Bioassays were performed to assess various endpoints within short-to longer-term exposures: avoidance behaviour (2 d), hatching (13 d), survival, reproduction and organisms’ size (based on the standard OECD test (28 d), the OECD extension (56 d), and the Full Life Cycle test – FLCt (46 d)). Based on the standard OECD test and its extension, NUCOP-M had a similar level of toxicity as copper oxychloride without indications of increase in toxicity over time (28 versus 56 d). The shorter-term exposures (2 and 13 d) showed higher toxicity for copper oxychloride. The exposure from cocoon stage (FLCt) seemed to provide an adaptative advantage (reduced toxicity) to NUCOP-M. The differences might be related to a slower release of Cu²⁺ ions from NUCOP-M, which seems to account for the toxicity at longer-term. Based on the recommended application doses (ca. 1.72 mg NUCOP-M kg⁻¹, i.e. 0.62 mg Cu kg⁻¹ in the topsoil) there is no unacceptable risk of NUCOP-M on the enchytraeid population.

纳米杀虫剂（Npes）与传统形式的杀虫剂相比，具有更高的功效，同时减少了用量/施用率，因此是更可持续的选择。然而，在纳米杀虫剂对环境的影响方面仍存在知识空白。为了支持纳米农药的安全性，本研究旨在利用生态毒理学土壤模型隐翅虫和 LUFA 2.2 土壤，评估商用 Npe NUCOP-M 和活性物质氧氯化铜的毒性。进行了生物测定，以评估短期至长期接触中的各种终点：回避行为（2 d）、孵化（13 d）、存活、繁殖和生物体大小（基于经合组织标准测试（28 d）、经合组织扩展测试（56 d）和全生命周期测试--FLCt（46 d））。根据经合组织的标准测试及其扩展测试，NUCOP-M 的毒性水平与氧氯化铜相似，但随着时间的推移（28 天与 56 天），毒性没有增加的迹象。短期接触（2 天和 13 天）显示氧氯化铜的毒性更高。从茧期（FLCt）开始接触 NUCOP-M 似乎具有适应优势（毒性降低）。这种差异可能与 NUCOP-M 释放 Cu2+ 离子的速度较慢有关，这似乎是毒性较长的原因。根据建议的施用剂量（约 1.72 毫克 NUCOP-M 千克-1，即表土中 0.62 毫克 Cu 千克-1），NUCOP-M 不会对尾丝虫种群造成不可接受的风险。

{"title":"Considering safe and sustainable by design alternatives–Environmental hazards of an agriculture nano-enabled pesticide to non-target species","authors":"","doi":"10.1016/j.chemosphere.2024.143582","DOIUrl":"10.1016/j.chemosphere.2024.143582","url":null,"abstract":"<div><div>Nanopesticides (Npes) offer improved efficacy compared to their conventional forms while reducing the usage/application rates, hence being more sustainable options. However, there is still a knowledge gap on the Npes environmental impacts. To support the safety of nano-enabled pesticides, the present study aimed at assessing the toxicity of the commercial Npe NUCOP-M and the active substance copper oxychloride, using the ecotoxicological soil model <em>Enchytraeus crypticus</em> and LUFA 2.2 soil. Bioassays were performed to assess various endpoints within short-to longer-term exposures: avoidance behaviour (2 d), hatching (13 d), survival, reproduction and organisms’ size (based on the standard OECD test (28 d), the OECD extension (56 d), and the Full Life Cycle test – FLCt (46 d)). Based on the standard OECD test and its extension, NUCOP-M had a similar level of toxicity as copper oxychloride without indications of increase in toxicity over time (28 versus 56 d). The shorter-term exposures (2 and 13 d) showed higher toxicity for copper oxychloride. The exposure from cocoon stage (FLCt) seemed to provide an adaptative advantage (reduced toxicity) to NUCOP-M. The differences might be related to a slower release of Cu<sup>2+</sup> ions from NUCOP-M, which seems to account for the toxicity at longer-term. Based on the recommended application doses (ca. 1.72 mg NUCOP-M kg<sup>−1</sup>, i.e. 0.62 mg Cu kg<sup>−1</sup> in the topsoil) there is no unacceptable risk of NUCOP-M on the enchytraeid population.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of K doping on Zn0.4Co2.6O4 spinel catalysts for low-temperature catalytic N2O decomposition in the presence of inhibitors K 掺杂对抑制剂存在下低温催化 N2O 分解的 Zn0.4Co2.6O4 尖晶石催化剂的影响

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143642

The recent development of NH₃ as a fuel has led to significant emissions of N₂O, a major greenhouse gas. Direct catalytic N₂O decomposition (de-N₂O) is a promising technology for N₂O emissions control because it effectively decomposes N₂O at low temperatures without requiring reducing agents or producing other pollutants. In marine applications, to improve the flame properties, NH₃ is often mixed with marine diesel oil, which contains sulfur. Although alkali-metal-doped Co-based catalysts show high de-N₂O activity at low temperatures, their performance in the presence of SO₂ has not been evaluated. In this study, we examined the effects of alkali metals on the Zn_0.4Co_2.6O₄ spinel-structured catalyst for low-temperature de-N₂O in the absence and presence of inhibitors (O₂, H₂O, and SO₂). Incorporating alkali metals (Na, K, Rb, and Cs) significantly enhanced the catalytic activity of the Zn_0.4Co_2.6O₄ spinel catalyst. Specifically, adding 1 wt% K reduced the light-off temperature from 271.7 °C to ∼150.0 °C at 60,000 h⁻¹ gas hourly space velocity in the absence of inhibitors. The enhanced electronic properties resulting from the addition of alkali metals led to weakening of Co–O bonds, promoting the regeneration of active sites and thus enhancing catalytic activity. K served as sacrificial sites for sulfur adsorption, delaying deactivation of the 1K–Zn_0.4Co_2.6O₄ spinel catalyst by SO₂. The formation of bulk sulfates, surface sulfites, and CoSO₄ was responsible for the deactivation by SO₂. Mechanisms for the deactivation by SO₂ and the promotion of SO₂ resistance by K in the Zn_0.4Co_2.6O₄ spinel catalyst are proposed.

近来，作为燃料的 NH3 的发展导致了主要温室气体 N2O 的大量排放。直接催化 N2O 分解（de-N2O）是一种很有前途的 N2O 排放控制技术，因为它能在低温下有效分解 N2O，而不需要还原剂或产生其他污染物。在船舶应用中，为了改善火焰特性，NH3 通常与含硫的船用柴油混合。虽然掺杂碱金属的 Co 基催化剂在低温下具有很高的脱一氧化二氮活性，但其在二氧化硫存在下的性能尚未得到评估。在本研究中，我们考察了碱金属对 Zn0.4Co2.6O4 尖晶石结构催化剂在无和有抑制剂（O2、H2O 和 SO2）情况下低温脱 N2O 的影响。碱金属（Na、K、Rb 和 Cs）的加入显著提高了 Zn0.4Co2.6O4 尖晶石催化剂的催化活性。具体来说，在没有抑制剂的情况下，添加 1 wt% 的 K 可将 60,000 h-1 气体时空速度下的熄灯温度从 271.7 ℃ 降至 150.0 ℃。碱金属的加入增强了电子特性，导致 Co-O 键减弱，促进了活性位点的再生，从而提高了催化活性。K 可作为硫吸附的牺牲位点，延缓 SO2 对 1K-Zn0.4Co2.6O4 尖晶石催化剂的失活。块状硫酸盐、表面亚硫酸盐和 CoSO4 的形成是 SO2 导致催化剂失活的原因。提出了 Zn0.4Co2.6O4 尖晶石催化剂中 SO2 失活和 K 对 SO2 抵抗性的促进机制。

{"title":"Effects of K doping on Zn0.4Co2.6O4 spinel catalysts for low-temperature catalytic N2O decomposition in the presence of inhibitors","authors":"","doi":"10.1016/j.chemosphere.2024.143642","DOIUrl":"10.1016/j.chemosphere.2024.143642","url":null,"abstract":"<div><div>The recent development of NH<sub>3</sub> as a fuel has led to significant emissions of N<sub>2</sub>O, a major greenhouse gas. Direct catalytic N<sub>2</sub>O decomposition (de-N<sub>2</sub>O) is a promising technology for N<sub>2</sub>O emissions control because it effectively decomposes N<sub>2</sub>O at low temperatures without requiring reducing agents or producing other pollutants. In marine applications, to improve the flame properties, NH<sub>3</sub> is often mixed with marine diesel oil, which contains sulfur. Although alkali-metal-doped Co-based catalysts show high de-N<sub>2</sub>O activity at low temperatures, their performance in the presence of SO<sub>2</sub> has not been evaluated. In this study, we examined the effects of alkali metals on the Zn<sub>0.4</sub>Co<sub>2.6</sub>O<sub>4</sub> spinel-structured catalyst for low-temperature de-N<sub>2</sub>O in the absence and presence of inhibitors (O<sub>2</sub>, H<sub>2</sub>O, and SO<sub>2</sub>). Incorporating alkali metals (Na, K, Rb, and Cs) significantly enhanced the catalytic activity of the Zn<sub>0.4</sub>Co<sub>2.6</sub>O<sub>4</sub> spinel catalyst. Specifically, adding 1 wt% K reduced the light-off temperature from 271.7 °C to ∼150.0 °C at 60,000 h<sup>−1</sup> gas hourly space velocity in the absence of inhibitors. The enhanced electronic properties resulting from the addition of alkali metals led to weakening of Co–O bonds, promoting the regeneration of active sites and thus enhancing catalytic activity. K served as sacrificial sites for sulfur adsorption, delaying deactivation of the 1K–Zn<sub>0.4</sub>Co<sub>2.6</sub>O<sub>4</sub> spinel catalyst by SO<sub>2</sub>. The formation of bulk sulfates, surface sulfites, and CoSO<sub>4</sub> was responsible for the deactivation by SO<sub>2</sub>. Mechanisms for the deactivation by SO<sub>2</sub> and the promotion of SO<sub>2</sub> resistance by K in the Zn<sub>0.4</sub>Co<sub>2.6</sub>O<sub>4</sub> spinel catalyst are proposed.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Evaluation of 14 PFAS for permeability and organic anion transporter interactions: Implications for renal clearance in humans” [Chemosphere 361 August 2024, 1–9, 142390] 对 "14 种全氟辛烷磺酸渗透性和有机阴离子转运体相互作用的评估：对人体肾脏清除率的影响"[《大气化学》361 2024 年 8 月，1-9，142390] 的更正

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143571

引用次数: 0

A novel simultaneous abatement of bromate and diphenyl phosphate using the freezing process 利用冷冻工艺同时消除溴酸盐和磷酸二苯酯的新方法。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-28 DOI: 10.1016/j.chemosphere.2024.143629

The purification of bromate (BrO₃⁻)-contaminated water has become a challenge because of its persistence and adverse effects. Furthermore, there has been concern over the release of byproducts, such as diphenyl phosphate (DPHP), from flame retardants in wastewater treatment plant (WWTP). In this study, we designed the water treatment system for the oxidation of DPHP accompanied by bromate (BrO₃⁻) reduction via freezing the solution. A sample containing 10 μM DPHP, 100 μM Br⁻, and 50 μM BrO₃⁻, with a pH of 3 was frozen at −20^oC, approximately 25 μM BrO₃⁻ was reduced, and DPHP was fully eliminated after a 0.5 h reaction time. Conversely, these reactions did not advance in water at 20^oC. This increase in the rate of chemical reaction in ice is the consequence of the freeze concentration effect, which refers to the extraction of dissolved chemical species into the liquid-like regions of the polycrystalline ice micro-structure during the freezing of the solution. The redox reactions among DPHP, Br⁻, and BrO₃⁻ become thermodynamically favorable due to the distinctive environment in the liquid brine in ice. The efficiency of the DPHP oxidation significantly increased with an increase in BrO₃⁻ concentration, and vice versa. The Br⁻/BrO₃⁻-induced HOBr production is proposed as a primary oxidant for DPHP degradation. The proton activity (pH) has a significant influence on the reaction efficiency. The low freezing temperature accelerated the reaction kinetics of DPHP degradation and BrO₃⁻ reduction. The results of this study indicate the possibility of utilizing ice chemistry for the BrO₃⁻ reduction that concomitantly removes DPHP for water treatment. This environmentally friendly water treatment method can be considered to implement in regions with a cold climate.

由于溴酸盐（BrO3-）的持久性和不良影响，净化被其污染的水已成为一项挑战。此外，人们还对废水处理厂（WWTP）中阻燃剂释放的副产品（如磷酸二苯酯（DPHP））表示担忧。在这项研究中，我们设计了一套水处理系统，用于通过冷冻溶液氧化 DPHP 并还原溴酸盐 (BrO3-)。将含有 10 μM DPHP、100 μM Br- 和 50 μM BrO3- 的 pH 值为 3 的样品冷冻在零下 20 摄氏度，大约 25 μM BrO3- 被还原，经过 0.5 小时的反应后，DPHP 被完全消除。相反，在 20oC 的水中，这些反应没有进展。冰中化学反应速率的增加是冷冻浓缩效应的结果，冷冻浓缩效应是指在溶液冷冻过程中，溶解的化学物质被萃取到多晶冰微结构的液态区域。由于冰中液态盐水的独特环境，DPHP、Br- 和 BrO3- 之间的氧化还原反应在热力学上变得有利。随着 BrO3- 浓度的增加，DPHP 的氧化效率显著提高，反之亦然。Br-/BrO3-诱导产生的 HOBr 被认为是降解 DPHP 的主要氧化剂。质子活性（pH 值）对反应效率有显著影响。低冷冻温度加速了DPHP降解和BrO3-还原的反应动力学。这项研究的结果表明，利用冰化学还原 BrO3- 并同时去除水处理中的 DPHP 是可行的。这种环境友好型水处理方法可考虑在气候寒冷的地区实施。

{"title":"A novel simultaneous abatement of bromate and diphenyl phosphate using the freezing process","authors":"","doi":"10.1016/j.chemosphere.2024.143629","DOIUrl":"10.1016/j.chemosphere.2024.143629","url":null,"abstract":"<div><div>The purification of bromate (BrO<sub>3</sub><sup>−</sup>)-contaminated water has become a challenge because of its persistence and adverse effects. Furthermore, there has been concern over the release of byproducts, such as diphenyl phosphate (DPHP), from flame retardants in wastewater treatment plant (WWTP). In this study, we designed the water treatment system for the oxidation of DPHP accompanied by bromate (BrO<sub>3</sub><sup>−</sup>) reduction via freezing the solution. A sample containing 10 μM DPHP, 100 μM Br<sup>−</sup>, and 50 μM BrO<sub>3</sub><sup>−</sup>, with a pH of 3 was frozen at −20<sup>o</sup>C, approximately 25 μM BrO<sub>3</sub><sup>−</sup> was reduced, and DPHP was fully eliminated after a 0.5 h reaction time. Conversely, these reactions did not advance in water at 20<sup>o</sup>C. This increase in the rate of chemical reaction in ice is the consequence of the freeze concentration effect, which refers to the extraction of dissolved chemical species into the liquid-like regions of the polycrystalline ice micro-structure during the freezing of the solution. The redox reactions among DPHP, Br<sup>−</sup>, and BrO<sub>3</sub><sup>−</sup> become thermodynamically favorable due to the distinctive environment in the liquid brine in ice. The efficiency of the DPHP oxidation significantly increased with an increase in BrO<sub>3</sub><sup>−</sup> concentration, and vice versa. The Br<sup>−</sup>/BrO<sub>3</sub><sup>−</sup>-induced HOBr production is proposed as a primary oxidant for DPHP degradation. The proton activity (pH) has a significant influence on the reaction efficiency. The low freezing temperature accelerated the reaction kinetics of DPHP degradation and BrO<sub>3</sub><sup>−</sup> reduction. The results of this study indicate the possibility of utilizing ice chemistry for the BrO<sub>3</sub><sup>−</sup> reduction that concomitantly removes DPHP for water treatment. This environmentally friendly water treatment method can be considered to implement in regions with a cold climate.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Individual and combined effects of commercial glyphosate, atrazine and 2,4-D herbicides on the gerbil ventral prostate 商用草甘膦、莠去津和 2,4-D 除草剂对沙鼠腹侧前列腺的单独和联合影响。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-28 DOI: 10.1016/j.chemosphere.2024.143626

Exposure to pesticides, individually or in a mixture, in drinking water is one of the main sources of human contamination, which causes adverse effects on the reproductive system. Our study aimed to investigate, the effects of a 90-day exposure to low concentrations of glyphosate (GLY), atrazine (ATZ), and 2,4-dichlorophenoxyacetic acid (2,4-D), in commercial formulations, on morphological, molecular, and hormonal parameters of the ventral prostate of gerbils (Meriones unguiculatus). The animals were exposed via drinking water to individual concentrations of GLY: 700 μg/L, ATZ: 3 μg/L, and 2,4-D: 70 μg/L, as well as to their mixture (MIX). Our findings showed an increase in prostatic complex relative weight in ATZ-exposed animals. Stereological and morphometric techniques indicated an increase in the percentage and thickness of muscular stroma, following an increase in the amount of collagen and reticular fibers in the MIX group. Histopathological analysis showed a decrease in the incidence of epithelial atrophy, subepithelial inflammation, and microacini in the MIX. On the other hand, ATZ-exposed animals showed an increase in hyperplasia and total prostatic intraepithelial neoplasia (PIN). The expression of caspase-3 decreased and estrogen receptor alpha (ERα) increased in the 2,4-D and MIX. Western blotting showed an increase in estrogen receptor beta (ERβ) expression in MIX-exposed animals. Testosterone levels decreased in animals from the GLY, ATZ and 2,4-D groups. Our findings provide evidence that individual or combined exposure to herbicides causes hormonal imbalance and morphological alterations, besides favoring the incidence of proliferative lesions in the prostate, predisposing the gland to more severe injuries.

接触饮用水中的杀虫剂（单独或混合物）是人类污染的主要来源之一，会对生殖系统造成不良影响。我们的研究旨在调查沙鼠（Meriones unguiculatus）在接触低浓度草甘膦（GLY）、阿特拉津（ATZ）和 2,4-二氯苯氧乙酸（2,4-D）商业配方 90 天后，腹侧前列腺的形态、分子和激素参数受到的影响。动物通过饮用水接触不同浓度的 GLY：700 μg/L、ATZ：3 μg/L、2,4-D：70 μg/L，以及它们的混合物（MIX）。我们的研究结果表明，暴露于 ATZ 的动物前列腺复合体相对重量增加。立体学和形态计量学技术表明，MIX 组中胶原蛋白和网状纤维的数量增加，肌肉基质的百分比和厚度也随之增加。组织病理学分析表明，MIX 组上皮萎缩、上皮下炎症和微孔的发生率降低。另一方面，ATZ 暴露动物的增生和前列腺上皮内瘤变（PIN）增加。在2,4-D和MIX中，Caspase-3的表达量减少，雌激素受体α（ERα）的表达量增加。Western 印迹显示，在暴露于 MIX 的动物中，雌激素受体 beta（ERβ）的表达增加。GLY、ATZ和2,4-D组动物的睾酮水平下降。我们的研究结果证明，单独或联合接触除草剂会导致荷尔蒙失衡和形态学改变，此外还有利于前列腺增生性病变的发生，使腺体容易受到更严重的伤害。

{"title":"Individual and combined effects of commercial glyphosate, atrazine and 2,4-D herbicides on the gerbil ventral prostate","authors":"","doi":"10.1016/j.chemosphere.2024.143626","DOIUrl":"10.1016/j.chemosphere.2024.143626","url":null,"abstract":"<div><div>Exposure to pesticides, individually or in a mixture, in drinking water is one of the main sources of human contamination, which causes adverse effects on the reproductive system. Our study aimed to investigate, the effects of a 90-day exposure to low concentrations of glyphosate (GLY), atrazine (ATZ), and 2,4-dichlorophenoxyacetic acid (2,4-D), in commercial formulations, on morphological, molecular, and hormonal parameters of the ventral prostate of gerbils (<em>Meriones unguiculatus</em>). The animals were exposed via drinking water to individual concentrations of GLY: 700 μg/L, ATZ: 3 μg/L, and 2,4-D: 70 μg/L, as well as to their mixture (MIX). Our findings showed an increase in prostatic complex relative weight in ATZ-exposed animals. Stereological and morphometric techniques indicated an increase in the percentage and thickness of muscular stroma, following an increase in the amount of collagen and reticular fibers in the MIX group. Histopathological analysis showed a decrease in the incidence of epithelial atrophy, subepithelial inflammation, and microacini in the MIX. On the other hand, ATZ-exposed animals showed an increase in hyperplasia and total prostatic intraepithelial neoplasia (PIN). The expression of caspase-3 decreased and estrogen receptor alpha (ERα) increased in the 2,4-D and MIX. Western blotting showed an increase in estrogen receptor beta (ERβ) expression in MIX-exposed animals. Testosterone levels decreased in animals from the GLY, ATZ and 2,4-D groups. Our findings provide evidence that individual or combined exposure to herbicides causes hormonal imbalance and morphological alterations, besides favoring the incidence of proliferative lesions in the prostate, predisposing the gland to more severe injuries.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly-efficient recovery of silver from industrial cyanide-based plating effluent on TiO2/activated carbon composites 在二氧化钛/活性炭复合材料上高效回收工业氰化电镀废水中的银。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-23 DOI: 10.1016/j.chemosphere.2024.143614

The release of silver-containing wastewater is an economic loss. In this works, the silver ions in the cyanide-based plating effluent of jewelry effluent was systematic recovered by the photocatalytic process using commercial semiconductors (TiO₂, ZnO, Bi₂O₃ and WO₃) and activated carbon (AC) enhanced semiconductors as the photocatalysts. The preliminary results demonstrated that the highest photocatalytic silver recovery was achieved via the use of TiO₂ nanoparticles (NPs), ascribing to its better textural property that provided abundant active sites to undergo the reaction. The intrinsic property and activity of TiO₂ were significantly improved in the presence of proper content of AC. Approximately 94% of silver was recovered within 45 min through the TiO₂/AC with 14.9 wt% AC (TiO₂/AC1) under the UV–vis irradiation due to the act of AC as the conductive pathway for electron migration from CB of TiO₂ along its surface, thus prolonging the lifetime of electron-hole pairs. Although a marked decrease in photocatalytic activity of the best composite was detected after the 4th use (∼50%), it exhibited an outstanding antibacterial ability compared with TiO₂ and fresh one in dark environment. The work offers the avenue to design the photocatalyst for recovering the precious metals from industrial effluent and broaden the application of such recovered metal decorated photocatalyst for practical use.

含银废水的排放是一种经济损失。本研究以商用半导体（TiO2、ZnO、Bi2O3 和 WO3）和活性炭（AC）增强型半导体为光催化剂，通过光催化过程系统地回收了首饰污水中氰化物电镀废水中的银离子。初步结果表明，使用二氧化钛纳米颗粒（NPs）实现的光催化银回收率最高，这归功于其较好的质地特性，为反应提供了丰富的活性位点。在 AC 含量适当的情况下，TiO2 的固有特性和活性得到了显著改善。在紫外可见光照射下，含有 14.9 wt.% AC 的 TiO2/AC（TiO2/AC1）在 45 分钟内回收了约 94% 的银，这是因为 AC 是电子从 TiO2 的 CB 沿其表面迁移的导电途径，从而延长了电子-空穴对的寿命。虽然最佳复合材料的光催化活性在第 4 次使用后明显下降（∼50%），但与 TiO2 和新鲜的 TiO2 相比，它在黑暗环境中表现出卓越的抗菌能力。这项工作为设计从工业废水中回收贵金属的光催化剂提供了途径，并拓宽了此类回收金属装饰光催化剂的实际应用。

{"title":"Highly-efficient recovery of silver from industrial cyanide-based plating effluent on TiO2/activated carbon composites","authors":"","doi":"10.1016/j.chemosphere.2024.143614","DOIUrl":"10.1016/j.chemosphere.2024.143614","url":null,"abstract":"<div><div>The release of silver-containing wastewater is an economic loss. In this works, the silver ions in the cyanide-based plating effluent of jewelry effluent was systematic recovered by the photocatalytic process using commercial semiconductors (TiO<sub>2</sub>, ZnO, Bi<sub>2</sub>O<sub>3</sub> and WO<sub>3</sub>) and activated carbon (AC) enhanced semiconductors as the photocatalysts. The preliminary results demonstrated that the highest photocatalytic silver recovery was achieved via the use of TiO<sub>2</sub> nanoparticles (NPs), ascribing to its better textural property that provided abundant active sites to undergo the reaction. The intrinsic property and activity of TiO<sub>2</sub> were significantly improved in the presence of proper content of AC. Approximately 94% of silver was recovered within 45 min through the TiO<sub>2</sub>/AC with 14.9 wt% AC (TiO<sub>2</sub>/AC1) under the UV–vis irradiation due to the act of AC as the conductive pathway for electron migration from CB of TiO<sub>2</sub> along its surface, thus prolonging the lifetime of electron-hole pairs. Although a marked decrease in photocatalytic activity of the best composite was detected after the 4th use (∼50%), it exhibited an outstanding antibacterial ability compared with TiO<sub>2</sub> and fresh one in dark environment. The work offers the avenue to design the photocatalyst for recovering the precious metals from industrial effluent and broaden the application of such recovered metal decorated photocatalyst for practical use.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How to use efficiently airborne criteria pollutants and radon-222 in source apportionment: A self-organizing maps approach 如何在来源分摊中有效利用空气中的标准污染物和氡-222：自组织地图方法。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-23 DOI: 10.1016/j.chemosphere.2024.143619

Pollutant source apportionment represents one of the fundamental activities in environmental science. Several efficient chemometric tools are available to the scope, mostly based on multivariate techniques and usually applied to aerosol chemical speciation data. In the present work, an alternative source profiling method is proposed, based on the self-organizing maps (SOM) algorithm. Moreover, the dataset used includes typical criteria pollutants and physical parameters related to airborne particulate matter widely used as a complement of aerosol source apportionment and largely available at a higher time resolution than bulk aerosol samplings, allowing the information on the dynamic behavior of the local airshed to be extended. In this work, data was collected at a coastal location in NW Italy, between January and July 2012. Hourly concentrations of typical gaseous pollutants (SO₂, NO, NO₂, benzene, toluene, (m-p)-xylene, o-xylene), black-carbon and particle number concentrations by an optical particle sizer (OPS) were collected. The dataset was integrated with radon-222 activity concentration and meteorological parameters to enrich and refine the information obtained by SOM computation as well as to improve the air pollution source localization. Despite the lower specificity of criteria pollutants, the approach developed was capable of revealing distinct pollution sources such as the urban background traffic, the coal-fired power plant active at the time of the study, and the harbor, in agreement with previous PM-based source apportionment studies carried out locally, while enlightening peculiar dynamical conditions detectable at the sub-daily time scale. The application of the SOM algorithm, with the integration of meteorological parameters and atmospheric radon, proved to be very efficient in unveiling the air pollution sources.

污染物来源分配是环境科学的基本活动之一。目前已有几种有效的化学计量工具，它们大多基于多元技术，通常应用于气溶胶化学标样数据。本研究基于自组织图（SOM）算法，提出了另一种源剖析方法。此外，所使用的数据集包括典型的标准污染物和与气载颗粒物有关的物理参数，这些数据被广泛用作气溶胶源分配的补充，而且大部分数据的时间分辨率高于大量气溶胶采样，从而可以扩展有关当地空气流域动态行为的信息。在这项工作中，数据是在 2012 年 1 月至 7 月期间在意大利西北部沿海地区收集的。收集了典型气态污染物（二氧化硫、氮氧化物、二氧化氮、苯、甲苯、间二甲苯、邻二甲苯）的小时浓度、黑碳浓度以及光学颗粒测定仪（OPS）测定的颗粒数浓度。数据集与氡 222 活性浓度和气象参数相结合，丰富和完善了通过 SOM 计算获得的信息，并改进了空气污染源定位。尽管标准污染物的特异性较低，但所开发的方法能够揭示不同的污染源，如城市背景交通、研究时活跃的燃煤发电厂和港口，这与之前在当地开展的基于可吸入颗粒物的污染源分配研究一致，同时还揭示了在亚日时间尺度上可检测到的特殊动态条件。事实证明，应用 SOM 算法并结合气象参数和大气氡，可以非常有效地揭示空气污染源。

{"title":"How to use efficiently airborne criteria pollutants and radon-222 in source apportionment: A self-organizing maps approach","authors":"","doi":"10.1016/j.chemosphere.2024.143619","DOIUrl":"10.1016/j.chemosphere.2024.143619","url":null,"abstract":"<div><div>Pollutant source apportionment represents one of the fundamental activities in environmental science. Several efficient chemometric tools are available to the scope, mostly based on multivariate techniques and usually applied to aerosol chemical speciation data. In the present work, an alternative source profiling method is proposed, based on the self-organizing maps (SOM) algorithm. Moreover, the dataset used includes typical criteria pollutants and physical parameters related to airborne particulate matter widely used as a complement of aerosol source apportionment and largely available at a higher time resolution than bulk aerosol samplings, allowing the information on the dynamic behavior of the local airshed to be extended. In this work, data was collected at a coastal location in NW Italy, between January and July 2012. Hourly concentrations of typical gaseous pollutants (SO<sub>2</sub>, NO, NO<sub>2</sub>, benzene, toluene, (m-p)-xylene, o-xylene), black-carbon and particle number concentrations by an optical particle sizer (OPS) were collected. The dataset was integrated with radon-222 activity concentration and meteorological parameters to enrich and refine the information obtained by SOM computation as well as to improve the air pollution source localization. Despite the lower specificity of criteria pollutants, the approach developed was capable of revealing distinct pollution sources such as the urban background traffic, the coal-fired power plant active at the time of the study, and the harbor, in agreement with previous PM-based source apportionment studies carried out locally, while enlightening peculiar dynamical conditions detectable at the sub-daily time scale. The application of the SOM algorithm, with the integration of meteorological parameters and atmospheric radon, proved to be very efficient in unveiling the air pollution sources.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal and spatial distribution of novel brominated flame retardants in atmosphere of the Beijing-Tianjin-Hebei region, China 中国京津冀地区大气中新型溴化阻燃剂的时空分布。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-22 DOI: 10.1016/j.chemosphere.2024.143598

The occurrence and spatio-temporal distribution of atmospheric novel brominated flame retardants (NBFRs) were studied across five sampling sites in the Beijing-Tianjin-Hebei (BTH) region over a whole year. By collecting samples (gas and particle) with a high-volume active air sampler (HV-AAS), nine NBFRs were analyzed and the sum concentrations ranged from 1.65 to 344 pg/m³, with the highest value found in the urban sampling site in Shijiazhuang City. Decabromodiphenylethane (DBDPE) was the predominant congener, which accounted for 60% of ∑₉NBFRs on average, while it was 90% of ∑₉NBFRs in the rural site and significantly higher than those observed in the urban sites (one-way ANOVA, p < 0.05). The levels of particle-bound NBFRs were significantly correlated with the variation of total suspended particulates (TSP) and temperature (p < 0.01), indicating their evident impact on the spatio-temporal distribution of NBFRs. Moreover, a significantly positive correlation was observed between the concentrations of 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB) and bis (2-ethyl-1-hexyl) tetrabromophthalate (BEH-TEBP) (p < 0.01). Monocyclic brominated flame retardants (including PBBz, PBT, PBEB, HBB and TBP-DBPE) were correlated with each other (p < 0.01) in both gas and particle phase, suggesting their co-occurrence and the similar source in the environment. The gas-particle partitioning behavior was well predicted by the Li-Jia Empirical Model, and the results indicated that the target NBFRs did not reach the equilibrium state in air. This is one of very few studies revealed the spatio-temporal distribution of atmospheric NBFRs in the BTH region.

研究了京津冀（BTH）地区五个采样点全年大气中新型溴化阻燃剂（NBFRs）的发生和时空分布情况。通过使用大风量主动空气采样器（HV-AAS）采集样品（气体和颗粒物），分析了 9 种新型溴化阻燃剂，其总浓度范围为 1.65 至 344 pg/m3，其中石家庄市城区采样点的浓度值最高。十溴二苯基乙烷（DBDPE）是最主要的同系物，平均占∑9NBFR 的 60%，而在农村采样点，其占∑9NBFR 的 90%，且明显高于城市采样点（单因素方差分析，p＜0.05）。

{"title":"Temporal and spatial distribution of novel brominated flame retardants in atmosphere of the Beijing-Tianjin-Hebei region, China","authors":"","doi":"10.1016/j.chemosphere.2024.143598","DOIUrl":"10.1016/j.chemosphere.2024.143598","url":null,"abstract":"<div><div>The occurrence and spatio-temporal distribution of atmospheric novel brominated flame retardants (NBFRs) were studied across five sampling sites in the Beijing-Tianjin-Hebei (BTH) region over a whole year. By collecting samples (gas and particle) with a high-volume active air sampler (HV-AAS), nine NBFRs were analyzed and the sum concentrations ranged from 1.65 to 344 pg/m<sup>3</sup>, with the highest value found in the urban sampling site in Shijiazhuang City. Decabromodiphenylethane (DBDPE) was the predominant congener, which accounted for 60% of ∑<sub>9</sub>NBFRs on average, while it was 90% of ∑<sub>9</sub>NBFRs in the rural site and significantly higher than those observed in the urban sites (one-way ANOVA, <em>p</em> < 0.05). The levels of particle-bound NBFRs were significantly correlated with the variation of total suspended particulates (TSP) and temperature (<em>p</em> < 0.01), indicating their evident impact on the spatio-temporal distribution of NBFRs. Moreover, a significantly positive correlation was observed between the concentrations of 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB) and bis (2-ethyl-1-hexyl) tetrabromophthalate (BEH-TEBP) (<em>p</em> < 0.01). Monocyclic brominated flame retardants (including PBBz, PBT, PBEB, HBB and TBP-DBPE) were correlated with each other (<em>p</em> < 0.01) in both gas and particle phase, suggesting their co-occurrence and the similar source in the environment. The gas-particle partitioning behavior was well predicted by the Li-Jia Empirical Model, and the results indicated that the target NBFRs did not reach the equilibrium state in air. This is one of very few studies revealed the spatio-temporal distribution of atmospheric NBFRs in the BTH region.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comprehensive evaluation of the nephrotoxicity of carbon quantum dots: Effects of the surface charge 全面评估碳量子点的肾毒性：表面电荷的影响

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-22 DOI: 10.1016/j.chemosphere.2024.143604

Carbon quantum dots (CQDs) are garnering attention for their broad applications. This study offers a detailed evaluation of the biomedical safety and health risks of carbon quantum dots (CQDs) with different surface modifications, addressing a key gap in their safe application. It focuses on three CQD types: diammonium citrate-based (CQDs-A), spermidine trihydrochloride-based (CQDs-S), and a combination (CQDs-A/S), analyzing their physicochemical properties, cytotoxicity, oxidative stress, inflammatory responses, and nephrotoxicity. While all CQDs were under 10 nm, their biological impacts varied. Positively charged CQDs-S and CQDs-A/S showed significant cytotoxicity in HEK293 cells, inducing oxidative stress but not activating NLRP3 inflammasome, indicating a limited inflammatory response. Renal integrity remained unaffected, with stable zonula occludens 2 expression and unaltered renal markers. In vivo studies in BALB/c mice further supported the safety of CQDs, showing no organ damage or kidney pathology at high doses. The findings underscore the potential for safe biomedical use of CQDs, particularly when their retention time is minimized. This research makes a novel contribution by linking CQDs' surface charge to cytotoxic effects and oxidative stress, providing key insights into their safe use in biomedicine and filling a critical gap in nanoparticle toxicity studies.

碳量子点（CQDs）因其广泛的应用而备受关注。本研究详细评估了经不同表面修饰的碳量子点（CQDs）的生物医学安全性和健康风险，解决了其安全应用方面的一个关键缺口。研究重点关注了三种类型的碳量子点：柠檬酸二铵型（CQDs-A）、三盐酸亚精胺型（CQDs-S）和组合型（CQDs-A/S），分析了它们的理化性质、细胞毒性、氧化应激、炎症反应和肾毒性。虽然所有的 CQDs 都在 10 纳米以下，但它们对生物的影响却各不相同。带正电荷的 CQDs-S 和 CQDs-A/S 在 HEK293 细胞中显示出显著的细胞毒性，可诱导氧化应激，但不会激活 NLRP3 炎症小体，这表明炎症反应有限。肾脏完整性未受影响，闭锁带 2 表达稳定，肾脏标志物也未发生变化。在 BALB/c 小鼠中进行的体内研究进一步证实了 CQDs 的安全性，研究显示，高剂量 CQDs 不会造成器官损伤或肾脏病变。这些发现强调了 CQDs 安全用于生物医学的潜力，尤其是当其保留时间最小化时。这项研究将 CQDs 的表面电荷与细胞毒性效应和氧化应激联系起来，为 CQDs 在生物医学中的安全使用提供了重要见解，填补了纳米粒子毒性研究的一个重要空白，从而做出了新的贡献。

{"title":"Comprehensive evaluation of the nephrotoxicity of carbon quantum dots: Effects of the surface charge","authors":"","doi":"10.1016/j.chemosphere.2024.143604","DOIUrl":"10.1016/j.chemosphere.2024.143604","url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) are garnering attention for their broad applications. This study offers a detailed evaluation of the biomedical safety and health risks of carbon quantum dots (CQDs) with different surface modifications, addressing a key gap in their safe application. It focuses on three CQD types: diammonium citrate-based (CQDs-A), spermidine trihydrochloride-based (CQDs-S), and a combination (CQDs-A/S), analyzing their physicochemical properties, cytotoxicity, oxidative stress, inflammatory responses, and nephrotoxicity. While all CQDs were under 10 nm, their biological impacts varied. Positively charged CQDs-S and CQDs-A/S showed significant cytotoxicity in HEK293 cells, inducing oxidative stress but not activating NLRP3 inflammasome, indicating a limited inflammatory response. Renal integrity remained unaffected, with stable zonula occludens 2 expression and unaltered renal markers. In vivo studies in BALB/c mice further supported the safety of CQDs, showing no organ damage or kidney pathology at high doses. The findings underscore the potential for safe biomedical use of CQDs, particularly when their retention time is minimized. This research makes a novel contribution by linking CQDs' surface charge to cytotoxic effects and oxidative stress, providing key insights into their safe use in biomedicine and filling a critical gap in nanoparticle toxicity studies.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interactions between dissolved organic matter with different molecular weights and nonylphenol in surface water bodies 地表水体中不同分子量的溶解有机物与壬基酚之间的相互作用。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-10-22 DOI: 10.1016/j.chemosphere.2024.143592

Dissolved organic matter (DOM) has a complex composition, which can interact with various pollutants and affect the removal of pollutants. Therefore, a thorough understanding of the interaction between the encccvironmental hormone nonylphenol (NP) and DOM is crucial for environmental impact and development. In this study, the interaction was investigated by means of excitation emission matrix (EEM) fluorescence spectroscopy, UV–Vis spectroscopy, FT-IR spectroscopy, nuclear magnetic resonance (NMR) and complex model analysis. The interaction between different MW DOM and NP was verified by the spectral characterization data. According to the characterization analysis, the main components of DOM in water samples were proteinoid (C1, C2, C4) with MW < 1 k Da, and their binding capacity (log K_a value) and binding site number (n) showed the maximum values (3.37, 3.24, 3.26; 0.81, 1.22, 0.52). For the humus like substance (C3) with larger molecular weight, the log K_a value and the number of binding points n increased with increasing molecular weight, and the maximum values were 3.13 and 0.31, respectively. It can be seen that low molecular weight proteins have strong binding ability and binding sites with NP, and high molecular weight humus also have strong binding ability. Overall, the interaction between DOM and NP has molecular weight dependence and heterogeneity. The purpose of this study is to deeply understand the interaction characteristics of different MW DOM with NP, and to provide theoretical support and reference for the study of the removal effects of NP pollutants.

溶解有机物（DOM）成分复杂，可与各种污染物相互作用，影响污染物的去除。因此，深入了解环境激素壬基酚（NP）与溶解有机物之间的相互作用对环境影响和发展至关重要。本研究通过激发发射矩阵（EEM）荧光光谱、紫外可见光谱、傅立叶变换红外光谱、核磁共振（NMR）和复合模型分析等方法研究了两者之间的相互作用。光谱表征数据验证了不同分子量的 DOM 与 NP 之间的相互作用。表征分析结果表明，水样中 DOM 的主要成分是蛋白素（C1、C2、C4），其分子量 a 值和结合位点数 n 值最大（3.37、3.24、3.26；0.81、1.22、0.52）。对于分子量较大的腐殖质类物质（C3），其对数 Ka 值和结合点数 n 随分子量的增加而增加，最大值分别为 3.13 和 0.31。由此可见，低分子量蛋白质与 NP 有较强的结合能力和结合位点，高分子量腐殖质也有较强的结合能力。总的来说，DOM 与 NP 的相互作用具有分子量依赖性和异质性。本研究旨在深入了解不同分子量 DOM 与 NP 的相互作用特征，为研究 NP 污染物的去除效果提供理论支持和参考。

{"title":"Interactions between dissolved organic matter with different molecular weights and nonylphenol in surface water bodies","authors":"","doi":"10.1016/j.chemosphere.2024.143592","DOIUrl":"10.1016/j.chemosphere.2024.143592","url":null,"abstract":"<div><div>Dissolved organic matter (DOM) has a complex composition, which can interact with various pollutants and affect the removal of pollutants. Therefore, a thorough understanding of the interaction between the encccvironmental hormone nonylphenol (NP) and DOM is crucial for environmental impact and development. In this study, the interaction was investigated by means of excitation emission matrix (EEM) fluorescence spectroscopy, UV–Vis spectroscopy, FT-IR spectroscopy, nuclear magnetic resonance (NMR) and complex model analysis. The interaction between different MW DOM and NP was verified by the spectral characterization data. According to the characterization analysis, the main components of DOM in water samples were proteinoid (C1, C2, C4) with MW < 1 k Da, and their binding capacity (log <em>K</em><sub><em>a</em></sub> value) and binding site number (<em>n</em>) showed the maximum values (3.37, 3.24, 3.26; 0.81, 1.22, 0.52). For the humus like substance (C3) with larger molecular weight, the log <em>K</em><sub>a</sub> value and the number of binding points n increased with increasing molecular weight, and the maximum values were 3.13 and 0.31, respectively. It can be seen that low molecular weight proteins have strong binding ability and binding sites with NP, and high molecular weight humus also have strong binding ability. Overall, the interaction between DOM and NP has molecular weight dependence and heterogeneity. The purpose of this study is to deeply understand the interaction characteristics of different MW DOM with NP, and to provide theoretical support and reference for the study of the removal effects of NP pollutants.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142514686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0