ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 39
·52582-52595
·
IF 0
Zhou Hao,Dang Yan,Chen Xinyu,Ivanets Andrei,Ratko Alexander A.,Kouznetsova Tatyana,Liu Yongqi,Yang Bo,Zhang Xulong,Sun Yiwei,He Xiaoyan,Ren Yanjie,Su Xintai
Due to industrialization, soil heavy metal pollution is a growing concern, with humic substances (HS) playing a pivotal role in soil passivation. To address the long duration of the compost humification problem, coal fly ash (CFA) in situ catalyzes the rapid pyrolysis of the cotton stalk (CS) to produce HS to address Cd passivation. Results indicate that the highest yield of humic acid (HA) (8.42%) and fulvic acid (FA) (1.36%) is obtained when the CS to CFA mass ratio is 1:0.5, at 275 ℃ for 120 min. Further study reveals that CFA catalysis CS humification, through the creation of alkaline pyrolysis conditions, Fe 2 O 3 can stimulate the protein and the decomposition of hemicellulose in CS, and then, through the Maillard and Sugar-amine condensation reaction synthesis HA and FA. Applying HS-CS&CFA in Cd-contaminated soil demonstrates a 26.69% reduction in exchangeable Cd within 30 days by chemical complexation. Excellent maize growth effects and environmental benefits of HS products are the prerequisites for subsequent engineering applications. Similar industrial solid wastes, such as steel slag and red mud, rich in Fe 2 O 3 , can be explored to identify their catalytic humification effect. It could provide a novel and effective way for industrial solid wastes to be recycled for biomass humification and widely applied in remediating Cd-contaminated agricultural soil.
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Changkun Liu,Xiaoyan Liang,Ji’an Liu,Xiaobin Lei,Xinzhen Zhao
In this study, a porphyrin functionalized cotton fiber was prepared and investigated for the visual detection and efficient adsorption of cadmium (Cd 2+ ) ions in aqueous solutions. The pristine cotton fiber was first grafted with poly (3-sulfopropyl methacrylate potassium salt) (PSMP) via the surface-initiated atom transfer radical polymerization (SI-ATRP), and subsequently immobilized with 5,10,15,20-tetrakis(1-methy-4-pyridinio)porphyrin tetra(p-toluenesulfonate) (TMPyP), to form the CPT (Cotton-PSMP-TMPyP) material. The CPT was characterized by SEM, FTIR, XPS and elemental analysis, and examined for the detection and adsorption of cadmium ions. The influencing factors such as pH and the initial cadmium ion concentrations on the adsorption performances were investigated. Results showed that the cadmium ion adsorption isotherm was best fitted with the Langmuir isotherm model, with the derived maximum adsorption capacity of 0.8638 mmol/g. The thermodynamic study showed the endothermic nature of the adsorption process. In addition, the adsorption kinetics was fast with over 90% of the total cadmium ions adsorbed within 2 min. Furthermore, the distinctive color response of the CPT to the cadmium ions in aqueous solutions was clearly displayed. A linear relationship between the light absorbance of CPT-Cd (CPT adsorbed with cadmium ions) and the initial concentrations of cadmium ions was successfully established, which could be used for the fast determination of the cadmium ion concentrations in aqueous solutions.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guanqiong Li,Tong Xu,Ruifang He,Chunping Li,Jie Bai
Photocatalytic water splitting is a promising method to obtain clean hydrogen energy, and the corresponding catalyst has received extensive attention. Among them, cadmium sulfide (CdS) has a relatively narrow band gap (2.4 eV) and a high conduction band position. It can be considered to be a good visible light photocatalyst in response to visible light. However, its application is limited because the existence of rapid photo-electron-hole recombination and photo-corrosion. In this work, a series of hollow CdS tubes have been successfully prepared with the novel morphology via simple one-step solvo-thermal method. The as-prepared catalysts displayed great photocatalytic activity for photocatalytic split water product H 2 under light (λ ≥ 350 nm). Due to the presence of the solvent carbon layer, the photo-corrosion of CdS was prevented, so it had good cycle performance. Meanwhile, the appropriate mole of cadmium sulfur dosage was explored and found that 3 mmol was the most suitable. The CdS-3 sample performed the optimal hydrogen (H 2 ) evolution rate (312.6 μmol g −1 h −1 ) within 4 h. In addition, based on various characterization results of the photocatalyst, the novel structure and probable catalytic mechanism were further explored.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Jun-Dan An,Tian-Tian Wang,Yang-Fan Shi,Jian-Zhong Huo,Xiang-Xia Wu,Yuan-Yuan Liu,Bin Ding
In recent years, a new type of micro-porous material, namely metal organic framework material, has received more and more attention from many basic and industrial fields because these materials possess unique advantages. In this work, through the powerful sonochemical preparation method, a three-dimensional cluster-based Cd II -MOFs, {[Cd(abtz) 2 (H 2 O) 2 ]·(ClO 4 ) 2 ·H 2 O} n ( 1 , abtz = 1-(4-aminobenzyl)-1H-1,2,4-triazole) can be quickly synthesized in the facile ultrasonic method. Powder X-ray diffraction (PXRD) measurement confirms that these bulky samples 1 (synthesized on different ultrasonic powers and ultrasonic time conditions) were pure . In addition, ultrasonic chemical time and irradiation power did not change the structure of composites materials 1 . SEM and morphological changes of 1 in the ultrasonic synthesis are also determined. Moreover, 1 exhibits good stability, the structure of 1 can be maintained not just in various solvents, and in aqueous environments with pH values from 2 to 12. Photo-luminescent experiment also reveals that complex 1 has the excellent application prospect as highly sensitive sensing material for the biomarker DPA (2,6-pyridine dicarboxylic acid) and 5-HT (5-hydroxytryptamine) through the photo-luminescence “turn-on” and “turn-off” effect, respectively. Further photo-luminescent measurements also show that different ultrasonic powers and ultrasonic time can effectively induce fluorescent sensing enhancement for biomarkers DPA and 5-HT based on the water stable clustered-based cadmium(II) coordination framework.
研究领域:
材料科学
·
生物学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2018
·
IF 3.667
Hui Liang,Wei-Liang Wu,Yong-Hui Zhang,Shao-Jun Zhou,Chao-Yang Long,Jian Wen,Bo-Yuan Wang,Zhi-Ting Liu,Chao-Zheng Zhang,Pan-Pan Huang,Ning Liu,Xiao-Ling Deng,Fei Zou
To systematically investigate the presence of toxic heavy metals and evaluate the potential health risks of heavy metals (HMs), the levels of cadmium (Cd), lead (Pb), arsenic (As), mercury (Hg), and chromium (Cr) in a total of 4401 representative samples of highly consumed fresh vegetables sampled from 21 prefecture-level cities of Guangdong Province, China, were determined by inductively coupled plasma mass spectrometry (ICP-MS). In the analyzed vegetables, the heavy metal concentrations exceeded the maximum allowable concentrations (MACs) set by Chinese legislation were of 2.41% for Cd, 1.61% for Pb, 0.55% for As, and 0.48% for Cr. The concentrations of HMs indicated significant differences ( p < 0.05) in vegetable groups and regions. Cd, and Pb were the major contaminants in vegetables according to the results of principal component analysis. During the four-year survey, a temporary rising trend was observed in As and Cr. The results from hierarchical cluster analysis also demonstrated that the status of HMs contaminations in vegetables from various regions displayed certain changes over time. The health risks associated with the intake of these HMs via vegetable consumption were evaluated in term of estimated daily intake (EDI), and noncarcinogenic and carcinogenic risks by target hazard quotient (THQ) and carcinogenic risk (CR). EDI values of each HM at both common and high consumption levels were observed to be less than the corresponding provisional tolerable daily intakes. The THQs of individual HMs and total target hazard quotients (TTHQs) were less than 1, indicating low health hazards for local residents. However, high consumption of stalk and stem vegetables, leafy vegetables , and root and tuber vegetables, and high consumption of vegetables marketed in the northern region (NR) of Guangdong Province resulted in TTHQs that approach 1 and may cause health risks to increase. The carcinogenic risks (CRs) of Cd, Pb and As were below the threshold level (10 −6 ) or residual level (10 −4 ), suggesting low potential CR from these HM exposures via vegetables consumption. However, highly consumed vegetable categories with high Cd concentrations and vegetables marketed in NR resulted in the CRs of Cd and TCRs exceeding the acceptable range, indicating that serious potential carcinogenic risks to human health may exist. In summary, the findings of this study reveal safe exposures of HMs via vegetable consumption, however, great concern should be focused on the noncarcinogenic and carcinogenic risks associated with high exposures of HMs, especially Cd, Pb and As, via high vegetable intake.
研究领域:
环境科学
·
食品安全
·
公共卫生
✓ 已验证
产品关联
DOI
高影响因子
AQUATIC TOXICOLOGY
·
2019
·
IF 3.794
Mengdi Xie,Yingxue Sun,Jianfeng Feng,Yongfei Gao,Lin Zhu
Predicting the sublethal effects of pollutants to aquatic organism is essential in realistic chemical risk assessment. However, only a few dynamics models for sublethal endpoints are available. Here, we investigated the toxic effects of the essential metal Cu and the nonessential metal Cd on Chlamydomonas reinhardtii under both single and combined exposure, compared the effectiveness of different effect endpoints as toxic effect factors, and developed a Dynamic Energy Budget toxicology (DEBtox) model to predict the sublethal effects of Cu and Cd on C. reinhardtii . The results showed that the chlorophyll fluorescence parameter is a better toxic effect indicator than others for short-term exposure (<24 h), while algal cell growth is preferred for long-term exposure (2–6 days). The developed DEBtox model could successfully predict single metal toxicity to C. reinhardtii, while the combined metal DEBtox model slightly overestimates the joint toxicity of Cu-Cd due to the antagonistic effect of Cu-Cd on C. reinhardtii. This study is helpful to understanding and better predictions of metal sublethal toxic effects on aquatic organisms.
研究领域:
环境毒理学
·
水生生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Environmental Science and Technology
·
2017
·Vol. 15
·期 7
·1561-1572
·
IF 1.915
Wang L.,Ma L.,Yang Z.
Heavy metal contamination in polished rice grains collected from Hunan Province, Southern China, has been investigated in this study. The concentrations of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn in rice were determined by microwave-assisted digestion and inductively coupled plasma-mass spectrometry method. In order to evaluate the correlations among heavy metals, statistical analyses including Pearson’s correlation analysis, principal component analysis and hierarchical cluster analysis were performed. Three distinct clusters were classified by the hierarchical cluster analysis approach. In the principal component analysis, three principle components were extracted with the eigenvalue >1.0. The spatial distribution of heavy metals was predicted by the ordinary kriging interpolation. Cu and Ni with similar distribution patterns could be primarily originated from geogenic source. The hot-spot areas in the distribution patterns of Mn, Pb and Zn could be mainly related to mining and smelting activities. Cd and Co might be derived from the combination of natural existence and anthropogenic sources. The chronic non-carcinogenic effect on local rice consumers from exposure to heavy metals was estimated by the target hazard quotient. The average target hazard quotient values of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn were 1.754, 0.367, 0.003, 0.544, 0.165, 0.775, 0.228, 0.049 and 0.481, respectively. The target hazard quotient value of Cd exceeded the threshold value suggesting high potential health risk to residents in Hunan Province through rice consumption.
研究领域:
环境科学
·
食品安全
·
公共卫生
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 6
·2653-2658
·
IF 1.821
Jing Sun,Zhaoguang Yang,Hsiaowan Lee,Lin Wang
The simultaneous separation and determination of As(III), As(V), monomethylarsenic acid (MMA), dimethylarsenic acid (DMA), Cr(III), Cr(VI) and Cd(II) in water samples have been carried out by anion exchange liquid chromatography with inductively coupled plasma mass spectrometry. Ethylenediaminetetraacetic acid was used to form negatively charged complexes with Cr(III) and Cd(II). For achieving the optimum chromatographic conditions, the effects of competing ion type, mobile phase concentration and pH on speciation have been investigated. By compromising among analysis time, chromatographic resolution and sensitivity, 40 mM ammonium nitrate at pH 8.6 has been selected as the mobile phase for real sample applications. The baseline separation of all the target species has been achieved under isocratic elution conditions. Under the optimized conditions, the limit of detection was in the range of 0.07–0.12 μg L−1 for the various species. The proposed method was applied to the determination of the target species in surface water and drinking water samples. Arsenate was the dominant arsenic species in all the tested samples. Neither MMA nor DMA was detected in real water samples. The recoveries for spikes of individual species in water samples tested ranged from 88% to 116%.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 33
·6313-6322
·
IF 1.915
Yanan Wu,Rong He,Zhigao Wang,Jian Yuan,Changrui Xing,Lifeng Wang,Xingrong Ju
Rice (Oryza sativa L.), an important cereal crop, has been seriously contaminated by cadmium (Cd) in the world. In this study, we compared the effects of three organic acids (citric acid, malic acid and tartaric acid) which are all approved food additives on the removal of Cd and developed a safe, efficient and simple technique to remove Cd from contaminated brown rice flour using citric acid (CA). The optimal conditions for citric acid removal of Cd were determined by a three-level Box–Behnken design with three factors (CA concentration, treatment temperature and treatment time) under the condition that the liquid–solid ratio was 12 mL g−1 and the shaking speed was 150 rpm, and the results were as follows: CA concentration, 0.08 mol L−1; treatment temperature, 45 °C; and treatment time, 53.09 min. Under these conditions, the removal efficiency of Cd was 94.28 ± 0.06%, which agreed well with the predicted value of 94.75%. Moreover, the contents of the main chemical components such as protein, starch and fat in the brown rice flour were still very high after citric acid treatment, indicating that this technique did not affect the quality of brown rice flour. This technique was also used in other brown rice flour samples and satisfactory results were obtained. Therefore, this technique is efficient in removing Cd and may have the potential to be used in the food industry to solve the Cd-rich rice problem in the world.
研究领域:
食品安全
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2016
·Vol. 72
·期 1
·153-165
·
IF 2.039
Ma Taowu,Wang Meng,Gong Shuangjiao,Tian Bin
The environmental factors are expected to affect the ecotoxicity of heavy metals in the presence of engineered nanoparticles (NPs) in aquatic ecosystems. However, in sediment scenario, little is known regarding their impacts on the ecotoxicity of co-exposure of sediment-associated heavy metals and NPs. This study evaluated the impacts of different levels of organic matter (OM) (4.8–11.6%) and pH (6–9) on the ecotoxicological effects of co-exposure of sediment-associated titanium dioxide nanoparticles (TiO 2 -NPs) and cadmium (Cd) to a freshwater gastropod Bellamya aeruginosa . The burdens of Ti and Cd and biomarkers of DNA damage, Na + /K + -ATPase, lipid peroxidation (LPO), and protein carbonylation (PC) in the hepatopancreas were determined following 21 days of exposure. At background level of OM (4.8%) in sediments, TiO 2 -NPs significantly promoted Cd accumulation in low-Cd treatments (5 mg/kg) but did not promote Cd accumulation in high-Cd treatments (25 mg/kg). At the relatively higher OM levels (7.1 and 11.6%), TiO 2 -NPs significantly enhanced Cd accumulation and toxicity as evidenced by aggravated DNA damage, decreased Na + /K + -ATPase activities, and increased LPO and PC levels. Moreover, Cd burdens in both low-Cd and high-Cd treatment were positively correlated with corresponding Ti burdens, indicating TiO 2 -NPs partially acted as carrier of Cd. At all pH levels, in low-Cd treatments, TiO 2 -NPs did not affect Cd accumulation, LPO, and PC levels but significantly enhanced DNA damage and slightly facilitated the inhibition of Na + /K + -ATPase activities. In high-Cd treatments, only at pH 9, TiO 2 -NPs significantly enhanced Cd accumulation and toxicity. Our results implied that interaction between TiO 2 -NPs and OM or pH significantly affected the accumulation and toxicity of Cd in B. aeruginosa , but the underlying mechanisms need further investigation. Additionally, it should be noted that the potential ecological risk of co-exposure of NPs and coexisting pollutants might be closely species-specific and related to environmental media.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Yulong Li,Sufen Dong,Jianchen Qiao,Shuxuan Liang,Xiaowei Wu,Mei Wang,Huiwei Zhao,Wei Liu
Soil aggregates play an important role in the migration and transformation of heavy metals . In this paper, solution adsorption and incubation experiments were carried out to explore the effects of soil texture (sandy loam and clay loam), nanominerals (nanomontmorillonite [nMt] and nanohydroxyapatite [nHA]), and pollution levels (5, 10, and 15 mg/kg) on the surface migration and transformation of cadmium in soil aggregates with different sized particles. The aim is to clarify the dynamics of cadmium in various particle size soil aggregates of different texture soils and demonstrate the positive effect of nanominerals on the partitioning and geochemical fractions of cadmium between the aggregates. The results showed that as the particle size decreased, the ability of the soil aggregates to carry cadmium initially decreased and then increased. Organic matter was the main factor influencing the cadmium distribution among the soil aggregates, whereas soil texture had no significant effect on the adsorption capacity of Cd 2+ in the soil particles. The soil aggregates with sizes <15 μm had the highest cadmium accumulation capacity. As the cadmium concentration increased, cadmium ions were more likely to accumulate in soil aggregates with small particles (<15 μm). The application of nanominerals promoted the migration of cadmium to <15 μm particles from 2000 to 45 μm particles in sandy loam and 75-15 μm particles in clay. nHA also significantly improved the content of residual cadmium in the <15 μm portion of both soil textures. This study provides a theoretical basis for the use of nano-fixatives in environmental restoration applications.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Yafei Zhang,Jing Ma,Jiajun Miao,Liang Yue,Mingzhao Cheng,Yi Li,Zhenzi Jing
More efficient soil remediation technologies are highly anticipated to treat large quantities of heavy metal-polluted urban sites nowadays. Herein, a novel hydrothermal technology of converting heavy metal-polluted soils into zeolites for in-situ immobilizing heavy metals was proposed. The zeolites (analcime and cancrinite) could be synthesized hydrothermally with certain Na/Si and Al/Si ratios. The formed zeolites could manage to change their species and structure during zeolitization to accommodate different heavy metals in soil according to their size and charge. Since smaller-size Cu 2+ was introduced, analcime and some cancrinite possessing small cages could be formed adaptively to immobilize the Cu 2+ by replacing Na + and forming Cu 2+ -OH and Cu 2+ -O. Whereas, cancrinite with large channels managed to form to immobilize the larger-size Cd 2+ by forming Cd 2+ -O. Interplanar spacing variation of zeolites also corresponded to their structural change for accommodating different heavy metals. Leaching results showed the amounts of Cu and Cd leached from the synthesized zeolites were reduced to 0.005% and 0.05% respectively, reflecting a more stable immobilization of smaller heavy metals by small cages, in agreement with the results of distribution coefficient ( K d ). Negligible effect of pH environment on the leaching rates further confirmed the stable structural immobilization of heavy metals by zeolites.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）