Article
Green & Sustainable Science & Technology
Huawen Han, Peizhi Song, Zhuoshan Cai, Weijun Dong, Aman Khan, Ke Yang, Yitian Fang, Pu Liu, Ondrej Masek, Xiangkai Li
Summary: This study developed a magnetic biochar (MB) to immobilize a novel chromate reductase NfoR via covalent binding, which showed enhanced activity in reducing Cr(VI) to Cr(III). The mechanism of Cr(VI) reduction by MB-NfoR was found to involve NfoR catalysis and persistent free radicals (PFRs). The addition of Cu(II) further increased the activity of MB-NfoR. Application-wise, MB-NfoR was effective in simultaneous removal of Cr(VI) and Cu(II) in smelting wastewater, without phytotoxicity and with enrichment of oligotrophic bacteria.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Microbiology
Yunhong Huang, Jie Tang, Bei Zhang, Zhong-Er Long, Haiyan Ni, Xueqin Fu, Long Zou
Summary: Microbial reduction is an effective method to deal with hexavalent chromium contamination, and this study investigated the influence of environmental factors on the removal of Cr(VI) by a newly isolated bacterium, Exiguobacterium sp. PY14. The research revealed the reduction mechanism and identified genes involved in Cr(VI) metabolism. The findings provide valuable information for the potential application of Exiguobacterium sp. PY14 in Cr(VI) removal in actual environments.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Paloma Lara, Leticia Vega-Alvarado, Diana X. Sahonero-Canavesi, Michel Koenen, Laura Villanueva, Fernando Riveros-Mckay, Enrique Morett, Katy Juarez
Summary: Strain AqSCr is able to resist high concentrations of Cr(VI) and has the capability to reduce Cr(VI), with resistance independent of the ChrA efflux transporter. Under Cr(VI)-adapted conditions, there were significant transcriptional changes in genes associated with oxidative stress, DNA repair, and other cellular processes.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Environmental Sciences
Ruiming Zhang, Rossana Napolano, Beidou Xi, Anne Millicent Salazar, Qiantao Shi, Ying Zhao, Xiaoguang Meng
Summary: Recent studies have found that the combination of zero-valent iron (ZVI) and pyrite (FeS2) can effectively remove Cr(VI) from water. This study discovered that dissolved oxygen (DO) plays a crucial role in enhancing the removal efficiency. The presence of DO led to the oxidation of pyrite, producing protons that promote ZVI corrosion and creating dissolved sulfide, which improves the removal of Cr(VI) by forming ferrous sulfide precipitates on the ZVI surface.
Article
Engineering, Environmental
Ashley B. Davidson, Chris Holmden, Sulung Nomosatryo, Cynthia Henny, Roger Francois, Sean A. Crowe
Summary: The leaching of lateritic soils in Central Sulawesi Island, Indonesia can lead to drainage waters with high concentrations of Cr(VI). A remediation strategy involving FeSO4 solutions effectively removes Cr(VI) from the drainage, but the presence of Mn oxides may cause the oxidative remobilization of Cr(III) and lead to an increase in Cr(VI) concentration downstream. Further improvements to Cr(VI) remediation should focus on preventing the back reaction of Cr(III) with Mn oxides.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Meng Li, Chunxia Tang, Shaohai Fu, Kam Chiu Tam, Yongzhong Zong
Summary: In this study, amine functionalized cellulose-based aerogel beads (CGP) were developed for simultaneous and efficient adsorption-reduction-sequestration of Cr(VI). The adsorption capacity, mechanism, and stability of CGP were investigated in detail. Batch adsorption experiments and fixed-bed column adsorption study demonstrated the potential application of CGP beads in wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Green & Sustainable Science & Technology
Ashvini Chaudhari, Dhiraj Paul, Viresh Thamke, Aditi Bagade, Vishwas A. Bapat, Kisan M. Kodam
Summary: This study investigated the pollution problem of dye and Cr(VI) and found that aerobic bacterial granules (ABGs) can effectively degrade dye and reduce chromate within a wide range of pH and temperature. The ABGs also demonstrated the potential to maintain their degradation capacity under continuous supply of dye.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Yi Zheng, Huilin Li, Qiu Yu, Lin Yu, Binquan Jiao, Dongwei Li
Summary: The combination of UV light with EKR technology utilizing natural organic matters and minerals in contaminated soil effectively reduced hexavalent chromium to trivalent chromium without the need for additional chemical reagents. This method improved the efficiency of EKR in soil near the anodic reservoir.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Huixin Xiong, Yang Liu, Shuyue Wang, Shibei Zhu
Summary: Chemical or biological synthesized iron hydroxides, such as schwertmannite and akaganeite, show high potential for removing chromium ions in polluted wastewater. The adsorption capacity of these materials for Cr(VI) is strong, with maximum adsorption achieved at pH 7.0. Phosphate ions have a greater impact on Cr(VI) adsorption than sulfate and carbonate ions. Moreover, schwertmannite and bioakaganeite exhibit good regeneration ability at temperatures of 288-318 K. Therefore, schwertmannite and bioakaganeite have promising applications in the treatment of acidic/neutral chromate-containing wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
H. Kenfoud, N. Nasrallah, O. Baaloudj, F. Derridj, M. Trari
Summary: In this study, BaFe2O4 nanoparticles with a crystallite size of 86 nm were synthesized and used for the photoreduction of chromate. Characterization of the BaFe2O4/SnO2 hetero-system confirmed a reduction efficiency of 99% for Cr(VI). Overall, the findings suggest that the BaFe2O4/SnO2 showed promising photocatalytic activity for environmental remediation.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Engineering, Environmental
Yimin Huang, Xueyan Li, Yan Peng, Hua Zhang, Anxian Shi, Xiujun Deng, Baoling Wang, Yingtang Zhou, Bing Wang, Guangzhi Hu
Summary: In this study, chitosan was modified to synthesize a spherical adsorbent for the removal of hexavalent chromium from wastewater. The adsorbent showed high adsorption capacity, good regeneration ability, and high selectivity for chromium. It has potential applications in removing chromium from real wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Hrudananda Sahoo, Kanika Kisku, Kumar S. K. Varadwaj, Prasannajit Acharya, Umesh Chandra Naik
Summary: This study focused on investigating the mechanism of chromate reduction and found that the Rhizobium pusense CR02 strain exhibited high resistance to Cr(VI). Extracellular and intracellular chromate reductases were involved in the reduction process. The extracellular polymeric substances produced by the strain enhanced the reduction activity. Furthermore, treatment of CMQW with the bacterial isolate reduced chromosomal aberrations in root cells. These findings suggest the potential application of Rhizobium pusense CR02 for Cr(VI) detoxification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yue Zhang, Yayuan Mo, Thierry Vincent, Catherine Faur, Eric Guibal
Summary: In this study, APEI beads were quaternized to enhance the sorption of Cr(VI), with optimal pH of 2 for both sorption and reduction. The reduction-assisted sorption mechanism boosts the global removal of chromate, while the sorbent's stability for Cr(VI) removal was confirmed through three successive sorption and desorption cycles. The interactions between the sorbent and Cr(VI) were further elucidated using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS).
Article
Chemistry, Physical
S. Habi Ben Hariz, H. Lahmar, G. Rekhila, A. Bouhala, M. Trari, M. Benamira
Summary: MgCr2O4 prepared by the sol-gel route exhibits good photoelectrochemical activity under visible light. It can effectively reduce hexavalent chromate to trivalent chromium under optimal conditions.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Engineering, Environmental
YunJin Kim, Jinseok Park, Junsik Bang, Jungkyu Kim, Hyoung-Joon Jin, Hyo Won Kwak
Summary: Nanocellulose has promising applications in water treatment due to its unique properties, such as renewability and large surface area; a study showed that carboxymethyl cellulose nanofibrils modified with polyethyleneimine had excellent Cr(VI) removal capacity and stability; the removal of Cr(VI) was achieved through a combination of electrostatic attraction, chemical reduction, and chelation mechanisms.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Zainab Rabiu, Mohd Amir Asyraf Mohd Hamzah, Rosnani Hasham, Zainul Akmar Zakaria
Summary: Pyroligneous acid obtained from slow pyrolysis of palm kernel shell has high total phenolic content and exhibits antioxidant and anti-inflammatory activities. Certain fractions showed significant inhibition towards COX-2 and 5-LOX enzymes, indicating potential as alternative antioxidant and anti-inflammatory agents.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Chemical
Asokogene Oluwadayo Francis, Muhammad Abbas Ahmad Zaini, Zainul Akmar Zakaria, Idris Misau Muhammad, Surajudeen Abdulsalam, Usman Aliyu El-Nafaty
Summary: Chitosan synthesized from Pessu river crab shell was screened into coarse, medium, and fine aggregates for phenol removal. The coarse chitosan exhibited the highest adsorption capacity and the possible adsorption mechanisms were identified as mesopore filling and ionic interactions. The study concluded that chitosan derived from crab shell is a promising adsorbent for the removal of phenol from wastewater.
PARTICULATE SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Wan Azlina Ahmad, Chidambaran Kulandaisamy Venil, Evans M. Nkhalambayausi Chirwa, Yi-Tin Wang, Mohd Helmi Sani, Abdul Fatah A. Samad, Mohd Farizal Ahmad Kamaroddin, Edgardo R. Donati, Maria Sofia Urbieta, Zainul Akmar Zakaria
Summary: The review discusses the significance of hexavalent and trivalent chromium compounds, the challenges of current Cr(VI) treatment techniques, and the feasibility of biological processes for Cr(VI) reduction in industrial effluents. It also highlights the cytotoxicity and genotoxicity of Cr(VI), recent findings in bacterial reduction of Cr(VI), operational challenges, and examples of laboratory-scale and pilot-scale evaluations.
CURRENT POLLUTION REPORTS
(2021)
Article
Energy & Fuels
Seri Elyanie Zulkifli, Mohd Amir Asyraf Mohd Hamzah, Maizatulakmal Yahayu, Astimar Abd Aziz, Najihah Mohd Hashim, Zainul Akmar Zakaria
Summary: This study optimized the extraction of acid condensate from palm kernel shell using microwave-assisted heating, resulting in increased phenolic content and demonstrated antimicrobial activity. TG-DTG analysis revealed the conditions for obtaining the highest phenolic content, and nitrogen flow rate had the most significant impact on the content.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Review
Environmental Sciences
Zainura Zainon Noor, Zainab Rabiu, Mohd Helmi Mohd Sani, Abdul Fatah A. Samad, Mohd Farizal Ahmad Kamaroddin, Maria Florencia Perez, Julian Rafael Dib, Huma Fatima, Rajeshwari Sinha, Sunil Kumar Khare, Zainul Akmar Zakaria
Summary: This review addresses the issues of unsafe disposal of antibiotics, incomplete degradation, antibiotic resistance properties on microorganisms, and available techniques to remove ARBs and ARGs from water systems. Linear correlation between antibiotic concentration in wastewater and emergence of ARBs and ARGs were found. WWTP is a primary source for ARB and ARG, but they have also been found in environments with no anthropogenic impact. Use of bioinformatic tools like plasmidome is important for analyzing ARGs. Various sources of antibiotics, classes of ARBs, and types of ARGs from different countries were covered.
CURRENT POLLUTION REPORTS
(2021)
Article
Energy & Fuels
Mohd Amir Asyraf Mohd Hamzah, Rosnani Hasham, Nik Ahmad Nizam Nik Malek, Raja Safazliana Raja Sulong, Maizatulakmal Yahayu, Fazira Ilyana Abdul Razak, Zainul Akmar Zakaria
Summary: In this study, concentrated acid condensate (CACE) extracted from microwave-assisted pyrolysis of palm kernel shells was evaluated for its biological activities, including antimicrobial, antioxidant, and anti-inflammatory effects. CFAC 3, a combined fraction of the CACE, exhibited the highest total phenolic content and antioxidant activities, as well as the strongest antibacterial activity against all tested bacteria.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Plant Sciences
Ting Hun Lee, Chia Hau Lee, Pei Ying Ong, Syie Luing Wong, Norfadilah Hamdan, Harisun Ya'akob, Nurul Alia Azmi, Shing Ching Khoo, Zainul Akmar Zakaria, Kian-Kai Cheng
Summary: Phytochemical compounds from plants provide good nutrient value and immense health benefits. This study compared different extraction methods and found that Modified Ultrasound-Assisted Extraction (MUAE) exhibited significant effectiveness in extracting phytochemical compounds from Melastoma malabathricum.
SOUTH AFRICAN JOURNAL OF BOTANY
(2022)
Article
Green & Sustainable Science & Technology
Fatin Aliah Phang, Anis Nadirah Roslan, Zainul Akmar Zakaria, Muhammad Abbas Ahmad Zaini, Jaysuman Pusppanathan, Corrienna Abdul Talib
Summary: This study explored the environmental awareness of three batik entrepreneurs in Malaysia and found that despite some level of awareness, they still practiced poor environmental methods due to the lack of affordable technology.
Article
Environmental Sciences
Guo Ren Mong, Chin Seng Liew, William Woei Fong Chong, Siti Aminah Mohd Nor, Jo-Han Ng, Rubia Idris, Meng Choung Chiong, Jun Wei Lim, Zainul Akmar Zakaria, Kok Sin Woon
Summary: This study evaluates the environmental impact, carbon footprint, and bioenergy yield of waste activated sludge (WAS) pyrolysis under different atmospheres. The findings show that pyrolysis in an N(2) atmosphere results in higher bioenergy yield and lower carbon footprint. Additionally, microwave pyrolysis has the potential to achieve a negative carbon footprint, and the use of CO2 as carrier gases helps reduce global warming.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Energy & Fuels
Mohd Amir Asyraf Mohd Hamzah, Rosnani Hasham, Nik Ahmad Nizam Nik Malek, Zanariah Hashim, Maizatulakmal Yahayu, Fazira Ilyana Abdul Razak, Zainul Akmar Zakaria
Summary: Biomass valorisation can have applications beyond green biofuel production, and in this study, acid condensate obtained from pyrolysis of palm kernel shells showed potential for biomedical use. The concentrated extract obtained from this process showed high antioxidant and wound healing activities, making it a promising alternative wound healing agent.
BIOFUEL RESEARCH JOURNAL-BRJ
(2022)
Article
Environmental Sciences
Mona Al Malki, Abu Zahrim Yaser, Mohd. Amir Asyraf Mohd. Hamzah, Muhammad Abbas Ahmad Zaini, Nurzila Ab Latif, Siti Halimah Hasmoni, Zainul Akmar Zakaria
Summary: This article discusses the global issue of improper wastewater treatment disposal and explores the potential of using date palm as a sustainable raw material to produce biochar and/or activated carbon. Despite the abundance of date palm biomass, there are few reports on its utilization in actual industrial processes, such as pollutant removal from water systems. This review provides new insights into the conversion techniques of date palm biomass, its characteristics, and evaluation of its pollutant removal capacity.
CURRENT POLLUTION REPORTS
(2023)
Article
Environmental Sciences
Nurul Elia Aqila Abu Rahim, Nur Izyan Wan Azelee, Siti Fatimah Zaharah Mohd Fuzi, Nasratun Masngut, Zainul Akmar Zakaria, Azham Zulkharnain, Rosli Md Illias, Nor Hasmaliana Abdul Manas
Summary: The purpose of this review is to investigate the effectiveness and recent strategies of crosslinked-ss-CD for the removal of pollutants from wastewater. Chemical crosslinking is a versatile method for developing a composite-ss-CD adsorbent, which offers a simple technique and moderate operational conditions for pollutant uptake and separation.
CURRENT POLLUTION REPORTS
(2023)
Article
Engineering, Multidisciplinary
Ridwan Iskandar, Hadiyanto Hadiyanto, Suherman Suherman, Zainul Akmar Zakaria
Summary: Emissions of carbon dioxide (CO2) and carbon monoxide (CO) gases are a major cause of global warming. In Indonesia, motor vehicles are a significant contributor to CO2 emissions, so a solution is proposed in the form of a gasoline and bioethanol mixture to reduce emissions and improve fuel efficiency and cost efficiency.
MAKARA JOURNAL OF TECHNOLOGY
(2022)
Proceedings Paper
Agriculture, Multidisciplinary
Nadiyah Faizi Polontalo, Falvocha Alifsmara Joelyna, Abdullah Malik Islam Filardli, Hadiyanto Hadiyanto, Zainul Akmar Zakaria
Summary: The study explored electrical energy generation using Microalgae Microbial Fuel Cell (MMFC) with Chlorella vulgaris and Batik wastewater. Results showed that 100% Batik wastewater concentration and 2:2 electrode configuration yielded the best performance in producing bioelectricity.
1ST INTERNATIONAL CONFERENCE ON BIOENERGY AND ENVIRONMENTALLY SUSTAINABLE AGRICULTURE TECHNOLOGY (ICON BEAT 2019)
(2021)
Article
Water Resources
Hemavathy Palanisami, Mohamad Rafiuddin Mohd Azmi, Muhammad Abbas Ahmad Zaini, Zainul Akmar Zakaria, Muhd Nazrul Hisham Zainal Alam, Mohd Azizi Che Yunus
Summary: The study evaluates the adsorptive properties of activated carbons from coffee residue for phenol removal, with comparable maximum capacity for both H3PO4- and KOH-activated carbons. However, the presence of surface functional groups and hydroxyl anions may hinder pore accessibility, necessitating a two-stage adsorber design for high performance and minimal activated carbon dosage. Coffee residue shows promise as a precursor for phenol removal with activated carbon.
WATER PRACTICE AND TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Shaofeng Zhou, Wenwen An, Cuifen Gan, Meiying Xu
Summary: Bacteria generate and release extracellular reactive oxygen species (eROS), which significantly contribute to the natural ROS pool and play a crucial role in metabolic interactions of bacteria with their environment. Understanding the behavior of eROS-generating bacteria and its environmental implications is of great importance in the cycling of biogeochemical elements, transformation of organic matter, and regulation of antibiotic resistance genes.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Ji-Dong Gu, Tim Ford, Bryce Mitton, Ralph Mitchell
Summary: Plastics and microplastics are widely present and accumulating in the environment, leading to increasing public attention. In addition to packaging plastics, materials from industries such as electronics, space and aviation are also accumulating, but receiving less attention. The production of degradable and biodegradable plastics is seen as a way to reduce environmental impacts, but enhancing the non-degradability of functional polymers is also a feasible option. Microbial colonization and deterioration pose significant challenges to these materials.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Justyna Bohacz, Michal Mozejko
Summary: This study evaluated the keratinolytic activity of 37 strains of Trichophyton ajelloi and found that pigmented strains isolated from loamy soil were more efficient in degrading native feather keratin, while non-pigmented strains isolated from chernozem showed better abilities. The keratinolytic activity increased over time, as evidenced by the increase in extracellular keratinase activity and release of soluble proteins and peptides. Protease activity peaked in the first 7 days and again on day 28 of culture. The release of ammonium and sulfate ions, associated with an increase in pH, reached its maximum on day 21. Three pigment-producing strains were among the most active in releasing large amounts of ammonium and sulfate ions. The biodegradation of feather waste by Trichophyton ajelloi strains can be used to produce fertilizers suitable for plants with high sulfur requirements.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Joseph M. Suflita, Brenda J. Little
Summary: This article reviews the major achievements of the International Biodeterioration & Biodegradation Society (IBBS) on its 50th anniversary and provides recommendations for addressing new challenges and developments based on personal experiences.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Zhenyan Lin, Tuo Jin, Xin Xu, Xiao Yin, Dan Zhang, Mengjiao Geng, Chunyu Pang, Gongwen Luo, Lizhi Xiong, Jianwei Peng, Jiangchi Fei
Summary: The incomplete recycle of residual mulch film (RMF) in recent years has led to an increase in plastic fragments in soil, posing a serious threat to the soil ecological environment. In this study, seven potential plastic-degrading microorganisms were screened and identified from film-mulched vegetable fields. The degradation ability experiments showed that both single strains and mixed strains demonstrated varying levels of degradation of RMF.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Tiina Belt, Michael Altgen, Muhammad Awais, Martin Nopens, Lauri Rautkari
Summary: This study investigated the degradation of heat-treated wood by brown rot fungi and found that the decay increased the hygroscopicity of wood in the decaying state. Furthermore, it was observed that heat-treated samples were more susceptible to fungal decay compared to untreated samples, which may be related to the increase in moisture content.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Marta Cicardi, Davide Bernasconi, Luca Martire, Linda Pastero, Giulia Caneva, Sergio E. Favero-Longo
Summary: This study investigated the phenomenon of Centimetric circular areas Uncolonized by Microbial Biofilms (CUMBs) on natural and heritage stone surfaces. The analysis revealed a compatibility in distribution and size between CUMBs and lichen thalli, suggesting a lichen origin for some CUMBs. Microscopic analysis also showed similar modifications in marble layers beneath CUMBs and lichens, indicating a possible alteration of stone properties by lichens.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
