Article
Environmental Sciences
Szende Tonk, Laszlo Elod Aradi, Gabor Kovacs, Alexandru Turza, Eszter Rapo
Summary: The excellent adsorption properties of clay minerals make them a popular choice for removing heavy metals. In this study, ASLAVITAL cosmetic clay powder from Romania was used to remove Cd2+ from water. The morphology and elemental composition of the clay were characterized using various techniques. The Langmuir II model provided the best fit for describing the adsorption process. Physical bonds were observed to form between the clay and Cd2+ during adsorption.
Article
Environmental Sciences
Agathe Didier Antonio Koya, Mpho Cynthia Qhubu, Malvin Moyo, Vusumzi Emmanuel Pakade
Summary: This study used graft copolymerization to modify acid-washed Madacamia nutshell biomass with diethylenetriamine (DETA) and maleic anhydride (MA). The modified biomass contained polar and ionizable groups that were capable of adsorbing and removing hexavalent chromium (Cr(VI)) from aqueous solutions. Adsorption efficiency ranged from 70.9% to 81.7% over a wide pH range. The adsorption isotherm data fit the Freundlich model and the Sips isotherm model provided the best fit. The study demonstrates the potential of using DETA and MA modified Madacamia nutshell biomass for the removal of Cr(VI) from aqueous solutions.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
C. Arab, R. El Kurdi, D. Patra
Summary: Zn(Cur)O NPs were synthesized and characterized, with adsorption increasing as the nanoparticle amount increases and dye concentration decreases. An acidic medium was found to improve the adsorption process.
MATERIALS TODAY CHEMISTRY
(2022)
Review
Polymer Science
Georgia Michailidou, Ioanna Koumentakou, Efstathios Liakos, Maria Lazaridou, Dimitra A. Lambropoulou, Dimitrios N. Bikiaris, George Z. Kyzas
Summary: Chitin is the second most important and abundant natural biopolymer in the world, mainly sourced from crustaceans. Chitosan, derived from chitin, has high value-added applications in pharmaceutical, biomedical, cosmetics, and food industries. Its potential for adsorption applications due to amino and hydroxyl groups allows for interactions with pollutants such as uranium, mercury, and REEs.
Article
Computer Science, Interdisciplinary Applications
Mohammad Eftekhari, Mohammad Gheibi, Hossein Azizi-Toupkanloo, Zahra Hossein-Abadi, Majeda Khraisheh, Amir Mohammad Fathollahi-Fard, Guangdong Tian
Summary: This study utilized Aerated Autoclave Concrete (AAC) modified with chitosan to synthesize AAC-CH composite for efficient and low cost removal of Cu2+, Pb2+, and malachite green from water. Optimal conditions were determined through Central Composite Design in Response Surface Methodology (CCD-RSM), and various isotherms indicated Freundlich as the governing adsorption mechanism. Kinetic modeling showed pseudo second order adsorption kinetics and physiosorption as the main interaction with AAC-CH composite. The high efficiency, low cost, reusability, and environmentally friendly aspects make AAC-CH composite a promising adsorbent for water decontamination.
JOURNAL OF INDUSTRIAL INFORMATION INTEGRATION
(2021)
Article
Environmental Sciences
James Friday Amaku, Segun A. Ogundare, Kovo G. Akpomie, Jeanet Conradie
Summary: ALU and KECA were used as adsorbents for the removal of toxic hexavalent chromium (Cr(VI)) from the aqueous phase. KECA showed a higher adsorption capacity and better reusability compared to ALU.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Yu Song, Takehiko Gotoh, Satoshi Nakai
Summary: A method using ascorbic acid as a reducing agent was proposed to remove hexavalent chromium from wastewater. The reduction and removal processes were facilitated by a cationic copolymer gel-supported reducing agent. Both gels showed high adsorption efficiency in a pH range of 3-6. The adsorption by both gels was found to be an endothermic, irreversible, and spontaneous process.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Construction & Building Technology
Shengnan Sha, Yihan Ma, Lei Lei, Yanrong Zhang, Yi Liu, Yuchong Xiao, Caijun Shi
Summary: This paper investigates the effect of PCE on the growth of ettringite through a series of experiments. The results show that PCE adsorption changes the proportion, stability, and morphology of ettringite. During the growth of ettringite crystals, sulfate ions and PCE preferentially adsorb on the faces of rectangular prism, limiting their growth on the {1010} faces and resulting in longitudinal growth.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Muhammad Kaleem, Lubna Anjum Minhas, Muhammad Zafar Hashmi, Mohammad Ajmal Ali, Rania M. Mahmoud, Saddam Saqib, Moona Nazish, Wajid Zaman, Abdul Samad Mumtaz
Summary: In this study, Nostoc sp. MK-11 was used as a biosorbent for the removal of Cd and Pb ions from synthetic aqueous solutions. The maximum biosorption capacity of Nostoc sp. MK-11 for Cd and Pb ions was found to be 75.757 mg g(-1) and 83.963 mg g(-1), respectively. The biomass showed high desorption efficiency and reusability.
Article
Polymer Science
Opeoluwa Adeiga, Tarisai Velempini, Kriveshini Pillay
Summary: A novel polyaniline-decorated lignocellulose composite adsorbent, MNS-PANI, was prepared and showed high efficiency in the uptake of Cr(VI). The adsorption behavior of MNS-PANI was well-described by pseudo-second-order kinetics and Langmuir isotherm models, with endothermic and spontaneous uptake of Cr(VI). Moreover, the spent adsorbent exhibited efficient photocatalytic degradation of ciprofloxacin.
Article
Agricultural Engineering
Dan Bahadur Pal, Roli Saini, Neha Srivastava, Irfan Ahmad, Mohammad Y. Alshahrani, Vijai Kumar Gupta
Summary: This study investigated the removal of lead from simulated wastewater using cost-effective bio-adsorbents made from mango seed shell with kernel (M) and jamun seed shell with kernel (JP). The optimal adsorption conditions were determined to be a speed of 500 rpm, a dosage of 60 mg, a pH of 6.5, and a contact time of 120 min. The bio-adsorbents exhibited adsorption capacities of around 39.15 mg/g for M and 20.28 mg/g for JP, with maximum lead removal efficiencies of 94.85% and 92.78%, respectively. The Freundlich model and pseudo-first order reaction kinetic model were found to best fit the regression coefficient for both bio-adsorbents.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Obakeng B. Nchoe, Themba D. Ntuli, Michael J. Klink, Fanyana M. Mtunzi, Vusumzi E. Pakade
Summary: A variety of biomass materials have been investigated for Cr(VI) removal by biosorption. Macadamia nutshells treated with different chemicals showed promising results, with the base-treated material exhibiting the best performance. The biosorbent showed high efficiency in Cr(VI) removal even in the presence of competitors.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Abdulaziz G. Alghamdi, Zafer Alasmary
Summary: The transport of heavy metals to groundwater depends on soil characteristics such as carbonate and clay minerals, organic matter content, soil pH, etc. Most heavy metals in calcareous soils are precipitated as metal carbonate minerals, so their transport to groundwater is not expected. This study focuses on the adsorption and transport of lead (Pb) and copper (Cu) in calcareous soil in the presence of calcium carbonate.
Article
Chemistry, Multidisciplinary
Hannah Namkoong, Erik Biehler, Gon Namkoong, Tarek M. Abdel-Fattah
Summary: This study explores a new method of efficiently removing Pb(II) ions from water by using Undaria pinnatifida to create immobilized beads with sodium alginate and calcium chloride. The resulting biosorbent has a higher adsorption capacity for Pb(II) ions compared to activated carbon, indicating its superior removal capability. The research also suggests that an increase in temperature promotes the biosorption reaction of Pb(II) ions.
Article
Environmental Sciences
Qaiser Khan, Muhammad Zahoor, Syed Muhammad Salman, Muhammad Wahab, Muhammad Talha, Abdul Waheed Kamran
Summary: This study aimed to eliminate chromium from industrial effluents using chemically modified Pteris vittata plant leaves as an adsorbent. The modified leaves showed high uptake capacity for chromium and the adsorption process was exothermic and spontaneous.
Article
Environmental Sciences
Laura Megido, Luis Negral, Leonor Castrillon, Beatriz Suarez-Pena, Yolanda Fernandez-Nava, Elena Maranon
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2017)
Article
Green & Sustainable Science & Technology
P. Ormaechea, L. Castrillon, B. Suarez-Pena, L. Megido, Y. Fernandez-Nava, L. Negral, E. Maranon, J. Rodriguez-Iglesias
Article
Environmental Sciences
Luis Negral, Beatriz Suarez-Pena, Eugenia Zapico, Yolanda Fernandez-Nava, Laura Megido, Jose Moreno, Elena Maranon, Leonor Castrillon
Article
Green & Sustainable Science & Technology
Daniel Gonzalez-Prieto, Yolanda Fernandez-Nava, Elena Maranon, Maria Manuela Prieto
Article
Environmental Sciences
E. Maranon, L. Negral, B. Suarez-Pena, Y. Fernandez-Nava, P. Ormaechea, P. Diaz-Caneja, L. Castrillon
Summary: This study investigated the methane potential of supermarket food waste under thermophilic conditions, finding that a mixture of waste from all supermarket sections produced the highest methane yield. However, excluding fruit and vegetable waste also produced similar results.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Energy & Fuels
Daniel Gonzalez-Prieto, Yolanda Fernandez-Nava, Elena Maranon, Maria Manuela Prieto
Article
Engineering, Environmental
L. Megido, L. Negral, Y. Fernandez-Nava, B. Suarez-Pena, P. Ormaechea, P. Diaz-Caneja, L. Castrillon, E. Maranon
Summary: The research found that induced bed reactors (IBR) with an organic loading rate (OLR) of 3.6 kg VS/m³ achieved optimal results for anaerobic digestion of supermarket food waste. IBR demonstrated higher methane production and volatile solids (VS) removal compared to completely stirred tank reactors (CSTR).
Article
Construction & Building Technology
D. Gonzalez-Prieto, Y. Fernandez-Nava, E. Maranon, M. M. Prieto
Summary: The study estimated the environmental impacts of modernization measures to improve energy efficiency of a cultural heritage office building in northern Spain. It found that by installing photovoltaic panels and a heat pump, reductions in Global Warming Potential and Cumulative Energy Demand can be further increased up to 54% and 61% respectively.
BUILDING RESEARCH AND INFORMATION
(2021)
Article
Environmental Sciences
Rosa Lara, Laura Megido, Beatriz Suarez-Pena, Luis Negral, Yolanda Fernandez-Nava, Jesus Rodriguez-Iglesias, Elena Maranon, Leonor Castrillon
Summary: Lockdown restrictions imposed during the COVID-19 pandemic have resulted in changes in atmospheric pollution levels. This study analyzed the hourly levels of PM10, PM2.5, and black carbon in a Spanish industrial suburban area from May 2019 to June 2020. The highest pollutant concentrations were observed when the wind came from the southwest and during nighttime. The decrease/increase in pollutant levels during the lockdown varied depending on the time period considered.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Engineering, Environmental
Rosa Lara, Beatriz Suarez-Pena, Laura Megido, Luis Negral, Jesus Rodriguez-Iglesias, Yolanda Fernandez-Nava, Leonor Castrillon
Summary: This study investigated the human health risk of metals/metalloids in the dry deposition fraction of settleable particulate matter in two sites in a coastal city in northern Spain. The main exposure pathway for residents was ingestion, and while levels were acceptable for adults, children showed higher levels of hazard indexes and carcinogenic risks for some elements. More research is needed to fully understand the impact of metals/metalloids in DSPM on human health.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Meeting Abstract
Cardiac & Cardiovascular Systems
L. Diaz-Chiron, L. Negral, A. Suarez, I. Pascual, B. Suarez-Pena, Y. Fernandez-Nava, R. Diaz, D. Hernandez-Vaquero, S. Rodriguez, P. Abreu-Gonzalez, A. Dominguez-Rodriguez, L. Castrillon, C. Moris, P. Avanzas Fernandez
EUROPEAN HEART JOURNAL
(2018)
