Chemosensors
·
2025
·Vol. 13
·期 1
·16
·
IF 3.7
Yuanxin Wan,Shixiang Ma,Peichao Zheng,Xiande Zhao,Zhen Xing,Leizi Jiao,Hongwu Tian,Daming Dong
Ca and Mg are key constituents in surface water that are essential nutrients and vital indicators of water hardness. Rapid on-site measurement of Ca and Mg concentrations in surface water is important. However, traditional laboratory detection methods are complex and time-consuming, and on-site detection is difficult. In this study, a portable surface water detection method was developed using laser-induced breakdown spectroscopy with a miniaturized spectrometer LIBS and a liquid jet device for sample introduction. The device enables the rapid online in situ measurement of elemental concentrations in the water. The limits of detection for the rapid on-site detection of Ca and Mg in surface water were 11.58 and 2.57 mg/L, respectively. We applied this method to assess the concentrations of Ca and Mg in authentic water samples collected from rivers and ponds. The recovery rates for Ca and Mg were 90.83–101.74% and 93.43–108.74%, respectively. This method is suitable for rapid, on-site, and highly sensitive monitoring of Ca and Mg concentrations in the environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Analysis and Testing
·
2022
·Vol. 7
·期 2
·157-162
·
IF 0
Gao Su,Ye Ming-Liang,Ma Rui,Liu Ai-Rong,Gao Hong-Wen
Based on the Mg 2 + complexation with acid chrome blue K (ACBK) at pH 10.2, an automatic system was designed to determine total hardness of water. The system consists of a vector colorimeter, a multi-channel sampling pump and both reagents A and B. Two kinds of reagent solutions were prepared and used in this system, i.e., ammoniacal buffer and ACBK—disodium magnesium EDTA solutions. The experimental results of the standard solutions containing 2 and 3 mg/L of total hardness showed that the relative standard deviations (RSDs) were 1.9% and 2.2%, respectively, and the limit of detection (LOD) was only 0.035 mg/L. The detection of four natural water samples showed that the recoveries were between 85.0% and 108.6%, consistent with those obtained by ICP-AES method.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
PLoS One
·
2024
·Vol. 19
·期 9
·e0308424
·
IF 2.9
Yulin Liu,Longzhan Dong,Wenli Wu,Jiantao Ping,Jingbo Chen,Qiongzheng Hu
Hardness is one of the basic parameters of water, and a high-level hardness of drinking water may be harmful to human health. Thus, it is very important to monitor drinking water hardness. In this work, a portable lateral flow distance-based paper sensor for the semi-quantitative detection of drinking water hardness is demonstrated. In the presence of Ca 2+ /Mg 2+ , the hydrogel can be formed via the chelation between sodium alginate and Ca 2+ /Mg 2+ , inducing a phase separation process. The viscosity change of the sodium alginate solution is directly related to the Ca 2+ /Mg 2+ concentration and can be determined by the water lateral flow distance on test strips. The sensor successfully realizes the quantification of Ca 2+ and Mg 2+ in the range of 0–10 mmol L -1 and 4–20 mmol L -1 , respectively. The recoveries are found varied from 95% to 108.9%. The water hardness is acceptable for drinking if the C r values lies in the range of 0.259 to 0.419, and it is high with the C r value above 0.595. Remarkably, the performance of the sensor is comparable with the commercial kit for real water samples, which avoids the subjective judgment. Overall, this method provides a portable approach for semi-quantitative detection of drinking water hardness with the merits of convenience and low cost, which shows great potential for the potential application.
研究领域:
环境科学
·
分析化学
·
水质监测
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mengwen Yu,Kainan Zhang,Xixuan Zou,Shuchi Zhang,Mandi Liu,Xiaofan Liu,Xinhua Xu,Pengyu Liang,Donglei Wu
The accumulation of nitrate-nitrogen in aquatic systems has led to notable adverse effects on global water environments and human health. Electrochemical methods offer a promising solution for nitrate removal, with iron cathodes demonstrating superior performance. However, a comprehensive understanding of the electrochemical reduction mechanism on iron electrodes, particularly regarding electron transfer pathways and the subsequent transformation of intermediates, is still lacking. This study delves into the electrochemical nitrate reduction mechanism on iron electrodes, revealing that the process starts with *NO 3 adsorption followed by two distinct pathways: deoxygenation (mainly producing N 2 , and mediated by *NO 2 intermediates) and hydrogenation (generating NH 4 + /NH 3 , and mediated by *NH 2 intermediates). DFT calculations demonstrate that electrochemical nitrate reduction on iron electrodes can is feasible. Notably, in the presence of Cl - , (common in real wastewater), a shift in primary reaction products from NH 3 to N 2 was observed. Additionally, the impact of inorganic ions on nitrate reduction was assessed: Mg 2+ was identified as the most significant inhibitor, reducing the reaction rate constant to 39.25 % of the control. Stability tests proved that the system can remain stable during long-term operation. These findings suggest that electrochemical reduction technologies should account for water hardness and implement appropriate pretreatment strategies to enhance efficiency. Environmental Implication. Nitrate pollution in aquatic environments poses a crucial threat to both ecosystems and human health. In this study, the mechanism of electrochemical nitrate reduction on commercial base metal electrodes was investigated, focusing on electron transfer pathways and subsequent transformation of reaction intermediates. The influence of inorganic ions on nitrate reduction efficiency was also examined in complex aqueous systems, such as membrane concentrates. The chlorine gas generated by the system can be captured in the exhaust gas treatment unit. These findings provide valuable insights for optimizing electrocatalytic treatment of nitrate contamination in practical applications.
研究领域:
环境化学
·
电化学
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水处理技术
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材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qingqing Li,Tianmeng Zhang,Zhixiang Dai,Fangyan Su,Xiangwei Xia,Ping Dong,Jianfeng Zhang
The demand to address issues such as drinking water safety and industrial fouling caused by high-hardness ions has still emphasized the development of advanced membrane materials. In this study, through a maneuverable amide-cross-linking strategy, a new positively-charged polyamide (PA) nanofiltration membrane was developed for the first time by incorporating amino-functionalized Ti 3 C 2 T x nanoparticles (Ti 3 C 2 T x -NH 2 , TN). In addition to the induced electropositivity, the hydrophilicity of the as-obtained PA-TN membrane was also elevated with a maintained nodular structure by tailoring the interfacial polymerization reaction process of piperazine (PIP) with trimesoyl chloride (TMC). Therefore, the newly developed PA-TN membrane exhibited both superhigh rejection of Ca 2+ and Mg 2+ over 96%, and the flux increased 2–3 times even for the salinity solutions than many similar NF membranes reported in literature. Furthermore, the enhanced long-term stability and fouling resistance of the PA-TN membrane was also validated due to its new organic-inorganic structural coupling and improved hydrophilicity. This work provides a new strategy for the preparation of organic-inorganic hybrid positively charged nanofiltration membranes for water softening treatment.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Pan-Pan Jia,Rohana Chandrajith,Muhammad Junaid,Tian-Yun Li,Yong-Zhi Li,Xing-Yi Wei,Li Liu,De-Sheng Pei
Chronic kidney disease with uncertain etiology (CKDu) in Sri Lanka has attracted much attention as a global health issue. However, how environmental factors in local drinking water induce kidney damage in organisms is still elusive. We investigated multiple environmental factors including water hardness and fluoride (HF), heavy metals (HM), microcystin-LR (MC-LR), and their combined exposure (HFMM) to elucidate their toxic effects on CKDu risk in zebrafish. Acute exposure affected renal development and inhibited the fluorescence of Na, K-ATPase alpha1A4:GFP zebrafish kidney. Chronic exposure influenced the body weight of both genders of adult fish and induced kidney damage by histopathological analyses. Furthermore, the exposure significantly disturbed differential expression genes (DEGs), diversity and richness of gut microbiota, and critical metabolites related to renal functions. The transcriptomic analysis revealed that kidney-related DEGs were linked with renal cell carcinoma, proximal tubule bicarbonate reclamation, calcium signaling pathway, and HIF-1 signaling pathway. The significantly disrupted intestinal microbiota was closely related to the environmental factors and H&E score, which demonstrated the mechanisms of kidney risks. Notably, the Spearman correlation analysis indicated that the changed bacteria such as Pseudomonas , Paracoccus , and ZOR0006 , etc were significantly connected to the DEGs and metabolites. Therefore, the assessment of multiple environmental factors provided new insights on “bio-markers” as potential therapies of the target signaling pathways, metabolites, and gut bacteria to monitor or protect residents from CKDu.
研究领域:
环境科学
·
毒理学
·
分子生物学
·
基因组学
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微生物学
·
公共卫生
✓ 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）