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Sequential separation of Cu(Ⅱ)/Ni(Ⅱ)/Fe(Ⅱ)from strong-acidic pickling wastewater with a two-stage process based on a bi-pyridine chelating resin

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Chinese Chemical Letters 2021年第9期32卷 2792-2796页

作者： Yingzhi Lv Lidan Zong Zicheng Liu Jianwei Du Fenghe Wang Yanhong Zhang Chen Ling Fuqiang Liu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510530China Jiangsu Key Laboratory of Material Cycle and Pollution Control School of EnvironmentNanjing Normal UniversityNanjing 210023China Jiangsu Provincial Key Laboratory of Environmental Engineering Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China

A self-synthesized bi-pyridine chelating resin(PAPY)could separate Cu(Ⅱ)/Ni(Ⅱ)/Fe(Ⅱ)sequentially from strong-acidic pickling wastewater by a two-stage p H-adjusted process,in which Cu(Ⅱ),Ni(Ⅱ),and Fe(Ⅱ)were successively preferred by *** the first stage(p H 1.0),the separation factor of Cu(Ⅱ)over Ni(Ⅱ)reached 61.43 in Cu(Ⅱ)-Ni(Ⅱ)-Fe(Ⅱ)*** the second stage(p H 2.0),the separation factor of Ni(Ⅱ)over Fe(Ⅱ)reached 92.82 in Ni(Ⅱ)-Fe(Ⅱ)*** was placed on the selective separation of Cu(Ⅱ)and Ni(Ⅱ)in the *** adsorption amounts of Cu(Ⅱ)onto PAPY were 1.2 mmol/g in the first stage,while those of Ni(Ⅱ)and Fe(Ⅱ)were lower than 0.3 mmol/***(Ⅱ)adsorption was hardly affected by Ni(Ⅱ)with the presence of dense Fe(Ⅱ),but Cu(Ⅱ)inhibited Ni(Ⅱ)adsorption *** of preloaded Ni(Ⅱ)could be replaced by Cu(Ⅱ)based on the replacement *** with the absence of Fe(Ⅱ),dense Fe(Ⅱ)could obviously enhance the separation of Cu(Ⅱ)-Ni(Ⅱ).More than 95.0%of Cu(Ⅱ)could be removed in the former 240 BV(BV for bed volume of the adsorbent)in the fixed-bed adsorption column process with the flow rate of 2.5 BV/*** proved by X-ray photoelectron spectrometry(XPS)and density functional theory(DFT)analyses,Cu(Ⅱ)exerted a much stronger deprotonation and chelation ability toward PAPY than Ni(Ⅱ)and Fe(Ⅱ).Thus,the work shows a great potential in the separation and purification of heavy metal resources from strong-acidic pickling wastewaters.

关键词： Bi-pyridine chelating resin Separation Dense Fe(Ⅱ) Strong-acidity Pickling wastewater

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Removal of algae and algogenic odor compounds via combined pre-chlorination and powdered activated carbon adsorption for source water pretreatment

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Separation and Purification Technology 2023年 304卷

作者： Zheng, Zheng-Xiong Lin, Yi-Li Fang, Ruo-Fan Zhou, Xiao-Yang Liu, Zhi Dong, Zheng-Yu Zhang, Tian-Yang Xu, Bin State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung824 Taiwan

This study investigated the combination sequence and time interval of chlorination and powdered activated carbon (PAC) adsorption for the control of algae inactivation, algogenic odor removal, and disinfection by-product (DBP) formation. Results indicated that pre-chlorination/post-PAC exhibited the highest algae removal efficiency in all sequential combinations of PAC adsorption and chlorination, while it had displayed slight effect on the removal of DBPs. The evaluated sequential combinations all had significant effect on the removal of odor. Nevertheless, prolonged time interval between chlorination and PAC adsorption exhibited enhanced control of algae and odor compounds in all experiments;with increasing time interval from 0 to 15 min in pre-chlorination/post-PAC process, the removal efficiency of Chl-a, algal cell viability, GSM, and 2-MIB increased by 46%, 15%, 15% and 23%, respectively. In the combined processes, the odor removal efficiency was positively correlated with PAC dosage but negatively correlated with chlorine dosage. Furthermore, PAC addition could effectively reduce the total DBP yields, especially the N-DBPs. This study can provide a better understanding of improving in-situ operation of the pre-chlorination and PAC dosing systems for source water pretreatment. © 2022 Elsevier B.V.

关键词： Algae

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The Influence of Acid and Alkaline Pretreatment on Chemical Composition, Fuel Properties, and Thermal Stability of Sewage Sludge Hydrochar

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SSRN 2023年

作者： Liu, Xiaoguang Chen, Yongdong Wang, Hong Yuan, Shijie Dai, Xiaohu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Changsha University of Science and Technology China

Hydrolysis has been recognized as the rate-limiting step of sewage sludge hydrothermal carbonization, resulting in a low degree of carbonization with partial unconverted feedstock and a high nitrogen content in hydrochar. In the current study, acid and alkaline pretreatment was adopted to accelerate solubilization and hydrolysis of carbohydrates and proteins, promote carbonization, and obtain high quality hydrochar with low nitrogen content. The nitrogen content decreased significantly to 1.05% and 0.94% at pH of 1 and 13, respectively, from 1.80% without pretreatment. The fuel properties of hydrochars were improved at pH of 1 and 4, but reduced at pH of 13. On the contrary, the thermal decomposition stability of hydrochars were improved with alkaline pretreatment at pH of 13, but reduced at pH of 1 and 4. Acid pretreatment led to enhanced degradation of organic substances and formation of more small-molecule acidic compounds, which promoted the aromatization reaction and increased the higher heating values and organic matter contents in hydrochars. Organic matters were mostly released to the aqueous phase with alkaline pretreatment at pH of 13, resulting in lower organic matter content in hydrochars. The results of the current study could provide valuable, quantitative information for applying acid and alkaline pretreatment to enhance hydrothermal carbonization of sewage sludge. © 2023, The Authors. All rights reserved.

关键词： Sewage sludge

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Sewer sediment adhesion degeneration and gelatinous biopolymer deconstruction by structural cation chelation and alkaline macromolecule hydrolysis for improving hydraulic erosion

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Chemosphere 2024年 356卷 141902页

作者： Lu, Jinsuo Liu, Jinxuan Li, Xingwang Zhang, Zhiqiang Wang, Sheping Pang, Heliang School of Environmental and Municipal Engineering Xi'an University of Architecture and Technology Xi'an710055 China Shaanxi Key Laboratory of Environmental Engineering Xi'an710055 China State Key Laboratory of Pollution Control and Resource Reuse Shanghai200092 China Xi ‘an Municipal Design and Research Institute Co. LTD Xi'an710055 China

Sediment siltation has been regarded as the serious challenge in sewer system, which dominantly root in the gelatinous extracellular polymeric substance (EPS) structure and cohesive ability. Considering the crucial roles of divalent cation bridging and macromolecular biopolymer winding in sediment EPS formation and adhesive behavior, an innovative combination strategy of sodium pyrophosphate (SP)-mediated divalent cation chelation and alkaline biopolymer hydrolysis was developed to degenerate sediment adhesion. At the SP dosage of 0.25 g/g TS and the alkaline pH 12, the SP + pH 12 treatment triggered structural transformation of aromatic proteins (α-helix to β-turn) and functional group shifts of macromolecular biopolymers. In this case, the deconstruction and outward dissolution of gelatinous biopolymers were achievable, including proteins (tyrosine-like proteins, tryptophan-like proteins), humic acids, fulvic acids, polysaccharides and various soluble microbial products. These were identified as the major driving forces for sediment EPS matrix disintegration and bio-aggregation deflocculation. The extraction EPS content was obviously increased by 18.88 mg COD/g TS. The sediment adhesion was sensitive to EPS matrix damage and gelatinous biopolymer deconstruction, leading to considerable average adhesion degeneration to 0.98 nN with reduction rate of 78.32%. As such, the sediments could be disrupted into dispersive fragments with increased surface electronegativity and electric repulsion (up to −45.6 mV), thereby the sediment resistance to hydraulic erosion was impaired, providing feasibility for in-situ sediment floating and removal by gravity sewage flow in sewer. © 2024

关键词： Adhesion

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Deep learning-based prediction of effluent quality of a constructed wetland

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Environmental Science and Ecotechnology 2023年第1期13卷 64-74页

作者： Bowen Yang Zijie Xiao Qingjie Meng Yuan Yuan Wenqian Wang Haoyu Wang Yongmei Wang Xiaochi Feng State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology(Shenzhen)ShenzhenGuangdong518055PR China Shenzhen Shenshui Water Resources Consulting CO LTDShenzhenGuangdong518022PR China College of Biological Engineering Beijing PolytechnicBeijing10076PR China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen518055China

Data-driven approaches that make timely predictions about pollutant concentrations in the effluent of constructed wetlands are essential for improving the treatment performance of constructed ***,the effect of the meteorological condition and flow changes in a real scenario are generally neglected in water quality *** address this problem,in this study,we propose an approach based on multi-source data fusion that considers the following indicators:water quality indicators,water quantity indicators,and meteorological *** this study,we establish four representative methods to simultaneously predict the concentrations of three representative pollutants in the effluent of a practical large-scale constructed wetland:(1)multiple linear regression;(2)backpropagation neural network(BPNN);(3)genetic algorithm combined with the BPNN to solve the local minima problem;and(4)long short-term memory(LSTM)neural network to consider the influence of past results on the *** results suggest that the LSTM-predicting model performed considerably better than the other deep neural network-based model or linear method,with a satisfactory R^(2).Additionally,given the huge fluctuation of different pollutant concentrations in the effluent,we used a moving average method to smooth the original data,which successfully improved the accuracy of traditional neural networks and hybrid neural *** results of this study indicate that the hybrid modeling concept that combines intelligent and scientific data preprocessing methods with deep learning algorithms is a feasible approach for forecasting water quality in the effluent of actual engineering.

关键词： LSTM Constructed wetlands Water quality prediction Deep learning Multi-source data fusion

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Ferrate(Ⅵ) oxidative degradation of capecitabine in aquatic matrices: Degradation performance, mechanisms, and toxicity assessment

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Journal of Environmental Chemical Engineering 2024年第6期12卷

作者： Yao, Binbin Lu, Yin Li, Anna Ma, Lan Wang, Wenlong Wu, Kai Ji, Yuefei Zhu, Feng Chen, Jing Lu, Junhe Department of Environmental Science and Engineering Nanjing Agricultural University Nanjing210095 China Jiangsu Provincial Center for Disease Control and Prevention Nanjing210023 China State Key Laboratory of Pollution Control and Resources Reuse Nanjing210023 China

The growing utilization of anticancer drugs in recent years has resulted in their presence in surface water and sewage, which could have ecological consequences. In this work, ferrate (Fe(VI)) was utilized to oxidize capecitabine (CAP), a frequently used anticancer drug that has gained attention lately. The experiments have demonstrated that Fe(VI) was quite reactive with CAP at pH 7. The addition of humic acid (0.1–10 mg L−1) significantly inhibited the oxidation process. Then, four reaction pathways, mainly including hydroxyl substitution, direct oxidation and cleavage of C[sbnd]O and C[sbnd]N bond were proposed based on twelve products detected by high-resolution hybrid quadrupole time-of-flight mass spectrometer. These pathways were further validated by theoretical calculations. Experiments conducted in water matrices assessed the applicability of Fe(VI) technology. Toxicity assessments of CAP and its intermediates were performed using the TEST program, and predictions indicated that the intermediates were generally less toxic than CAP. Overall, this work revealed that Fe(VI) has great potential to solve the environmental pollution problems associated with capecitabine in water. © 2024 Elsevier Ltd

关键词： Capecitabine Degradation mechanism Ferrate(VI) Kinetics Theoretical analysis

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Correction: Membrane technologies in toilet urine treatment for toilet urine resource utilization: a review

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RSC Advances 2023年第7期13卷 4530-4531页

作者： Chengzhi Yu Wenjun Yin Zhenjiang Yu Jiabin Chen Rui Huang Xuefei Zhou State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China The Third Clinical Medical College Zhejiang Chinese Medical University Hangzhou 310053 China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai 200092 China

Correction for ‘Membrane technologies in toilet urine treatment for toilet urine resource utilization: a review’ by Chengzhi Yu et al., RSC Adv., 2021, 11, 35525–35535, https://***/10.1039/D1RA05816A.

Correction for ‘Membrane technologies in toilet urine treatment for toilet urine resource utilization: a review’ by Chengzhi Yu et al., RSC Adv., 2021, 11, 35525–35535, https://***/10.1039/D1RA05816A.

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Vanadium(Ⅳ)solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with[Cl^(-)]present:an experimental and theoretical study

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Frontiers of Chemical Science and Engineering 2023年第1期17卷 56-67页

作者： Hong Liu Yi-Min Zhang Jing Huang Tao Liu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan University of Science and TechnologyWuhan 430081China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China

Separation of vanadium from black shale leaching solution at low pH is very meaningful,which can effectively avoid the generation of alkali neutralization slag and the resulting vanadium *** this study,coordination mechanism of vanadium in acid leaching solution at low pH was investigated with the intervention of chloride *** the conditions of pH 0.8,di-(2-ethylhexyl)phosphoric acid concentration of 20%,phase ratio of 1:2,and extraction time of 8 min,the vanadium extraction could reach 80.00%.The Fourier transform infrared and electrospray ionization results reveal that,despite the fact that the chloride ion in the leachate could significantly promote vanadium extraction,the chloride ion does not enter the organic phase,indicating an intriguing *** Cl^(-)-V,SO_(4)^(2-)-V,and H_(2)O-V,the V-Cl bond is longer and the potential difference between coordinate ions and vanadium is ***,Vo^(2+)gets easily desorbed with chloride ions and enter the organic *** the same time,the hydrogen ions of di-(2-ethylhexyl)phosphoric acid also enter the water phase more easily,which reduces the pH required for the extraction reaction.

关键词： vanadium black shale solvent extraction high acidity extraction

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Identification, Annotation and Toxicity Estimation of Organic Pollutants in Human Serum Via Nontarget Analysis

SSRN

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SSRN 2024年

作者： Li, Yuqian Yang, Yajing Wang, Xuebing School of Environmental Science and Engineering Qingdao University Qingdao266071 China Qingdao Municipal Hospital Qingdao266011 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Environmental pollution causes a threat to the ecological environment, constrains social development and also has potential harm to human health. We applied nontarget analysis to extract and screen pollutants from the serum of 89 individuals, identifying 67 pollutants in the categories of industrial intermediates, plasticizers, surfactants, pharmaceuticals, pesticides, and exogenous pollutant metabolites. The detection rate of industrial related pollutants is higher, reflecting the environmental exposure characteristics of the surrounding functional areas. In addition, 1168 potential pollutant features were annotated to 10 superclasses. Exposure levels of identified pollutants were quantified by predicting response factors via machine learning model. Highly exposed pollutants involved various categories, especially pharmaceuticals due to their property of being easily absorbed by human body cross biological barriers. Toxicity of developmental toxicity, bioconcentration, mutagenicity and oral rat LD50 were predicted with the occurrence rates of 62.7%, 10.4%, 11.9% and 11.9% of the identified pollutants respectively. 4-[3-(Trifluoromethyl)benzyl]piperidine, risperidone, and aminocarb were predicted to have multiple toxic effects, which deserved attention and further hazard assessment. This study provides a comprehensive pattern of human exposure to pollutants, contributing to evaluate the health risks caused by pollutants to the population, thus providing data support for the monitoring and management of pollutants. © 2024, The Authors. All rights reserved.

关键词： Metabolites

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The Microplastics Release by Polymeric Membranes and its Relevant Microbiotic Implications in Drinking Water

SSRN

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SSRN 2023年

作者： Tian, Yu Li, Weiying Li, Yue Liang, Li Sun, Shengxin Zhang, Wei State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China College of Environmental Science and Engineering Tongji University Shanghai200092 China Tongji University China

Since membrane technology has been widely utilized for water purification, a diversity of micropollutants is able to be removed efficiently. However, the possibility of releasing microplastics (MPs) from the membrane filtration system itself is generally ignored. Here, based on micro–Fourier Transform Infrared Spectroscopy, scanning electron microscope and 16S rRNA gene sequencing, the abundance and characteristics of MPs released from four different polymeric membranes i.e., mixed cellulose ester (MCE), polyvinylidene fluoride (PVDF), polyether sulfone (PES) and polyamide (PA) were explored. Moreover, the potential effects of membrane leachates on the community structure of indigenous bacteria in tap water were also analyzed. Results showed that polymeric membranes could release thousands of MPs per square meter (10,200–23630 p/m2), with a size range between 20 μm and 5 mm. Most of the MPs were fragments and fibers (>80%), and their composition was consistent with the original membrane materials. According to microbial analysis, membrane leachates could evidently change the microbial community structure, promoting bacterial proliferation but decreasing microbial diversity simultaneously. MiSeq sequencing showed that Alphaproteobacteria (94.6%) were the dominant class in tap water, whereas Gammaproteobacteira (50.5%–84.3%) became more abundant in the leachates. This study provides a new insight into the relationship between microplastics and polymeric membranes. © 2023, The Authors. All rights reserved.

关键词： Fourier transform infrared spectroscopy

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