Article
Environmental Sciences
Gabriela Caetano, Remigio de Matos Machado, Maria Joana Neiva Correia, Isabel Maria Marrucho
Summary: Soil plays a vital role in supporting life on Earth, and its protection from contamination is of great importance. This study focuses on optimizing the ex situ soil washing process using surfactants, aiming to reduce the costs of raw materials, energy, and water resources. Two surfactants, SDS and Tween 80, were tested for decontaminating oil-contaminated soil, and the washing conditions were optimized using a design of experiments software. The results showed that Tween 80 achieved a TPH removal efficiency of (80.7 +/- 3.2)% after 5 hours of washing, while SDS achieved (90.7 +/- 2.8)% after 2 hours at 200 rpm. The potential for reusing the washing solutions was evaluated, and the safe disposal of the washing solution was ensured by using activated carbon to remove the surfactants.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhaolu Huang, Quanyuan Chen, Yuan Yao, Zhao Chen, Juan Zhou
Summary: Enhanced diesel removal from contaminated soil was achieved by using micro-bubbles and selected surfactants based on their solubilization properties and decontamination capacities. The use of a mixture solution of saponin and cyclodextrin, as well as micro-bubble enhancement, significantly increased diesel removal efficiency. Moreover, a 90-minute flushing time with circulation of flushing solution effectively ensured the cleaning goal while retaining soil solute for residual diesel biodegradation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Israel Goncalves Sales da Silva, Juliano Rodrigues Pappalardo, Nathlia Maria Padilha da Rocha e Silva, Attilio Converti, Fabiola Carolina Gomes de Almeida, Leonie Asfora Sarubbo
Summary: The use of soil washing technology and green surfactants can effectively remove petroleum pollutants from soil, avoiding the toxicity and by-product issues associated with conventional surfactants.
Article
Environmental Sciences
Shweta Ambust, Amar Jyoti Das, Souvik Kumar Paul, Rajesh Kumar, Debashish Ghosh
Summary: This paper presents a methodical strategy for efficient remediation of oil spill from contaminated marine intertidal zone surface using biosurfactant mediated washing. The study focuses on the production, optimization, and application of lipopeptide biosurfactant from Bacillus subtilis T1 in different marine intertidal zones. The results demonstrate enhanced washing performance and oil desorption rate, with the highest rate observed in the mudflats group. Kinetic validation shows good agreement between experimental data and the pseudo second-order kinetics.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Junlong Yu, Ruyue Li, Xiuxia Zhang, Yi Du, Ruojun Ma, Xiaodong Zhao, Shuai Zuo, Kangning Dong, Ruirui Wang, Yupeng Zhang, Yingying Gu, Juan Sun
Summary: The use of surfactant-modified compost sludge as a carrier to immobilize high-efficiency petroleum hydrocarbon-degrading bacteria for remediation of hydrocarbon-contaminated soil was studied. The results showed that the modified compost sludge enhanced the adsorption capacity to petroleum hydrocarbons, and the immobilized microorganisms had a positive effect on soil remediation. Furthermore, the immobilized materials also increased the diversity of microbial communities in the soil.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Jianan Yin, Guohe Huang, Chunjiang An, Peng Zhang, Xiaying Xin, Renfei Feng
Summary: The use of nanocellulose fluid as an eco-friendly agent for the remediation of polycyclic aromatic hydrocarbons in contaminated soil was investigated. Factors such as temperature and ionic strength were found to significantly influence the removal of contaminants, primarily through changes in the nanofluid properties. Results also showed that metals and minerals in soil played a crucial role in the mobilization of contaminants.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agronomy
Lina Wang, Jing Wei, Lu Yang, Yun Chen, Mengjie Wang, Liang Xiao, Guodong Yuan
Summary: The potential of a soluble humic substance derived from leonardite for copper removal from contaminated soils was explored in this study. The effects of different washing conditions on removal efficiency were assessed, and it was found that a single washing with the humic substance solution achieved an optimal removal efficiency of 37.5%. A two-step soil-washing approach using a chemical reductant NH2OH·HCl coupled with the humic substance solution further increased the removal efficiency to 53.0%.
Article
Biotechnology & Applied Microbiology
Shengbin Ni, Shafiqur Rahman, Shuto Kasai, Shoji Yoshioka, Kuo H. Wong, Asami S. Mashio, Hiroshi Hasegawa
Summary: Lead contamination in shooting range soils poses a threat to ecosystems and human health. Chelator-assisted washing using biodegradable chelators such as EDDS, GLDA, and HIDS has shown promise as a viable treatment option. FeCl3 and CaO can be used as post-treatment to immobilize residual lead. This study provides a practical remediation strategy for extracting lead from soil and reducing leaching potential.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Environmental
Indo Sabo Bulai, Haruna Adamu, Yuguda Abubakar Umar, Ahmed Sabo
Summary: This study utilized enzymes derived from fruit garbage to remediate soils contaminated by used motor oil. The enzymes from orange and watermelon peels showed promising oil and grease removal efficiencies, indicating their potential for biocatalytic remediation of oil-contaminated soils.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
E. Vazquez-Velez, J. Monzon-Mendoza, H. Martinez, B. Campillo
Summary: This study synthesized three green surfactants from coconut oil, evaluated their effectiveness in removing TPH, and found that the cationic surfactant was the most effective. Gas Chromatography-Mass and UV-Vis spectroscopy were used to characterize and quantify the residual diesel in the soil, meeting the maximum permissible limits of TPH.
REVISTA MEXICANA DE INGENIERIA QUIMICA
(2022)
Article
Environmental Sciences
Yi Wang, Yuan Li, Shuai Yang, Qi-Hao Wang, Shao-Cheng Si, Han-Yi Mei, Guo-Ming Liu, Xiang-Liang Pan, Yong-Ming Luo
Summary: Soil washing is an effective method for removing heavy metals from farmland soil, and the choice of washing agents is crucial for the efficiency of the removal. This study tested the potential of three residues of traditional Chinese herbal medicine extracts for Cd removal and identified the optimal conditions. The results showed that the extract from Prunus mume residues was a more feasible and environmentally friendly washing agent.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
S. S. Narani, S. Bojnourdi, M. Abbaspour, S. Siddiqua
Summary: This study investigates the hydro-mechanical properties of sawdust-treated hydrocarbon-contaminated soils. Experimental tests show that sawdust treatment has a positive influence on shear strength but a negative influence on unconfined compressive strength (UCS) and water conductivity. Fiber-reinforced mixtures of sawdust-treated soils display better shear response, higher UCS, and increased conductivity.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Environmental Sciences
Xian'an Yu, Tong Zhou, Jie Zhao, Changxun Dong, Longhua Wu, Yongming Luo, Peter Christie
Summary: The study investigated the remediation of metal-polluted agricultural soil through a combination of chemical washing and repeated phytoextraction. The results demonstrated the potential of this method for treating agricultural soils contaminated with multiple metals.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2021)
Article
Environmental Sciences
Nnanake-Abasi O. Offiong, Opeyemi K. Fatunla, Joseph P. Essien, Chaoge Yang, Jun Dong
Summary: In this study, aqueous extracts of waterleaf were used as a plant-derived surfactant to wash simulated crude oil-contaminated soils. The results showed that the efficiency of the waterleaf extracts for removing polycyclic aromatic hydrocarbons was comparable to that of a commercial surfactant, while the washed soils retained significant amounts of nutrients and favorable pH moderation.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Mingming Zheng, Menghua Cao, Danhua Yang, Shuxin Tu, Shuanglian Xiong, Wenjuan Shen, Haiyan Zhou
Summary: In this study, a novel approach using tetrapolyphosphate enhanced soil washing coupled with ferrous sulfide treatment was employed for the remediation of cationic and anionic metals/metalloids co-contaminated soil. The results showed that tetrapolyphosphate could enhance the desorption of cationic metals and anionic metal/metalloid, while ferrous sulfide treatment could effectively remove these contaminants from the washing effluent. This approach offers a promising remediation method for co-contaminated soil with high efficiency and simple operation.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Yingjie Li, Haiyu Chang, Hui Yan, Senlin Tian, Philip G. Jessop
Summary: In this study, the use of N,N-dimethylcyclohexylamine as a switchable-hydrophilicity solvent for the absorption of toluene showed excellent performance in separation processes. By bubbling CO2 and N-2, efficient desorption and separation were achieved, and the absorption capacity of the solvent remained comparable even after multiple cycles. This innovative and reversible remediation strategy utilizing switchable-hydrophilicity solvents has the potential to be a more environmentally friendly and energy-efficient alternative to traditional absorbents for reducing VOC pollution.
Article
Chemistry, Multidisciplinary
Jesse R. Vanderveen, Philip G. Jessop
Summary: This exercise allows students to learn about green chemistry principles, QSAR, and virtual screening by finding the greenest chemical in a hypothetical scenario. By generating structure libraries and predicting properties, students improve their ability to select the greenest chemical for an application.
JOURNAL OF CHEMICAL EDUCATION
(2021)
Article
Chemistry, Multidisciplinary
Alexis Bordet, Sami El Sayed, Matthew Sanger, Kyle J. Boniface, Deepti Kalsi, Kylie L. Luska, Philip G. Jessop, Walter Leitner
Summary: This study reports the preparation of a catalytic system designed to respond adaptively to feed gas composition in hydrogenation reactions. Ruthenium nanoparticles immobilized on amine-functionalized polymer-grafted silica act as active and stable catalysts for the hydrogenation of biomass-derived furfural, acetone, and related substrates. The formation of alkylammonium formate species at the amine-functionalized support triggers the selectivity switch in the catalytic reaction, with the catalyst performance responding almost in real time to the feed gas composition.
Article
Engineering, Chemical
Michael F. Cunningham, Philip G. Jessop
Summary: This article reviews the principles of CO2 switching and its applications in various materials and processes. It also highlights the recent research conducted on new switchable polymers and related processes, emphasizing the potential opportunities and solutions that CO2 switching may offer for commercial development.
MACROMOLECULAR REACTION ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yuyan Zhang, Sami El Sayed, Liqun Kang, Matthew Sanger, Thomas Wiegand, Philip G. Jessop, Serena Debeer, Alexis Bordet, Walter Leitner
Summary: Ruthenium nanoparticles immobilized on an amine-functionalized polymer-grafted silica support can selectively catalyze the hydrogenation of bicyclic heteroaromatics. The addition of CO2 to the hydrogen gas phase can effectively shut down the arene hydrogenation reaction while maintaining activity for heteroaromatic hydrogenation. This selectivity switch is achieved through the catalytic generation of ammonium formate species on the material's surface by hydrogenation of CO2. By altering the composition of the feed gas, a variety of benzofuran and quinoline derivatives can be selectively hydrogenated to fully or partially saturated products using a single catalyst.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Vanessa Saab Liberato, Tatiana Felix Ferreira, Alex Redmond MacDonald, Bernardo Dias Ribeiro, Maria Alice Zarur Coelho, Philip G. Jessop
Summary: PDO can be produced by fermenting glycerol, but separating it from the aqueous medium is difficult. A new method called Solvent-Assisted Switchable Water (SASW) is proposed. In this method, a hydrophilic solvent is used to extract PDO from water, while a CO2-switchable ionogen prevents the solvent from merging with the aqueous phase. The extraction yield was 73%, but the extracted PDO contained water and amine, indicating that further improvement is needed for selective extraction.
Review
Chemistry, Multidisciplinary
Ross D. D. Jansen-van Vuuren, Sina Naficy, Maedeh Ramezani, Michael Cunningham, Philip Jessop
Summary: CO2-responsive materials undergo changes in their properties when CO2 is introduced or removed. CO2 is advantageous as a stimulus due to its abundance, benign nature, affordability, and lack of accumulation in a system. Various CO2-responsive materials such as polymers, latexes, surfactants, and catalysts have been explored. CO2-responsive gels, a subset of CO2-responsive polymers, have unique changes such as swelling or transformed morphology. This paper reviews the preparation, properties, and applications of CO2-responsive gels, including nanogels, microgels, aerogels, and macrogels, and also discusses CO2-induced self-assembled gels.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Physical
Robin R. Benedix, Sophia Botsch, Natalie Preisig, Volodymyr Kovalchuk, Philip G. Jessop, Cosima Stubenrauch
Summary: Switchable materials, especially CO2-switchable materials, are of great interest in environmental research. Replacing non-switchable materials with switchable counterparts has the potential to make processes more environmentally friendly by enhancing reusability and circularity, reducing energy costs and material consumption. This study focuses on the surface and foaming properties of aqueous solutions containing a non-switchable surfactant and a CO2-switchable additive. The results show that the additive can change surface properties, foamability, and foam stability when switched with CO2.
Article
Chemistry, Multidisciplinary
Philip G. Jessop, Alex R. Macdonald
Summary: The life cycle of a product contains hotspots, which are the steps causing the majority of harm. Traditional practice often overlooks the importance of identifying these hotspots. Therefore, the utilization of life cycle assessments to identify hotspots and drive the selection of research projects is necessary to maximize environmental benefits.
Article
Chemistry, Multidisciplinary
Michael F. Cunningham, Philip G. Jessop
Summary: The development and design of CO2-switchable colloidal particles were discussed, including the principles and recent progress in the preparation of various types of colloidal particles for different applications. Future opportunities in this field were also analyzed.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Igor T. Cunha, Meghan McKeeman, Maedeh Ramezani, Kayleigh Hayashi-Mehedy, Alana Lloyd-Smith, Marco Bravi, Philip G. Jessop
Summary: Volatile organic solvents are widely used in various industries, but their emissions, inhalation risks, and flammability pose significant concerns. Switchable-hydrophilicity solvents (SHS), which can switch between water-miscible and water-immiscible states, offer a solution to these issues. Anionic SHS (ASHS) systems, composed of hydrophobic carboxylic acid and water-soluble base, provide a new variation of SHS. This study reports the development of a low-toxicity SHS without the need for excess water, using branched carboxylic acids and substoichiometric amounts of NaHCO3 or NaOH.
Article
Chemistry, Multidisciplinary
Tamara M. de Winter, Jaddie Ho, Christopher J. Alridge, Philip G. Jessop
Summary: A new methodology for asymmetric hydrogenation of allylamines is proposed using a reversible reaction between amines and carbon dioxide (CO2) to suppress unwanted side reactions. The effects of various parameters on the enantioselectivity and conversion were studied, and it was found that the addition of base additives can improve the enantioselectivity and chemoselectivity of the reaction.
Article
Chemistry, Multidisciplinary
Bailey A. Smith, Pascale Champagne, Philip G. Jessop
Summary: The new method allows for high-yield CMF synthesis from fructose without chlorinated solvents, and can be extended to the synthesis of CMF from other feedstocks.
Article
Materials Science, Multidisciplinary
Ross D. Jansen-van Vuuren, Guilherme Drechsler Vilela, Maedeh Ramezani, Peter H. Gilbert, Danika Watson, Nathan Mullins, Allen K. Lucas, Alan Jeffrey Giacomin, Michael F. Cunningham, Philip G. Jessop
Summary: A CO2-responsive SAP hydrogel capable of switching between hydrophobic and hydrophilic states in the presence of CO2 has been reported. These hydrogels can absorb and release water with the presence or absence of CO2, demonstrating their reusability and potential for various applications.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Igor T. Cunha, Huilin Yang, Philip G. Jessop
Summary: Biomass conversion to organic products is crucial for a sustainable society, but current energy costs and environmental impacts, particularly in removing water, remain problematic. The new method of high pressure switchable water (HPSW) shows promise in more efficiently separating organic products from water by changing the polarity of organic liquids and utilizing CO2 pressure.