Article
Engineering, Environmental
Zheng Liu, Yuxin Sun, Yuan Zeng, Yufeng Guan, Yuqi Huang, Yuping Chen, Daning Li, Ling Mo, Shejun Chen, Bixian Mai
Summary: Measurements of hazardous semi-volatile organic compounds (SVOCs) in fine particulate matter (PM2.5) at Yongxing Island in the South China Sea showed low concentrations of polycyclic aromatic compounds (PACs), largely influenced by Southeast Asian countries and southern China. The atmospheric loss of SVOCs and enhanced formation of N/OPAHs from tropical regions were significant factors for the low PAC concentrations. Enhanced atmospheric reactions and insignificant local sources were further indicated through results and correlation analyses.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Paulina Godlewska, Patryk Oleszczuk
Summary: The study found that biochar derived from a mixture of SL and biomass (SLW) had a better effect on the persistence and bioavailability of PAHs in soil compared to biochar derived solely from sewage sludge (SL).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Magdalena Konczak, Paulina Godlewska, Malgorzata Wisniewska, Patryk Oleszczuk
Summary: This study examines the effects of biochar derived from sewage sludge (BCSSL) or sewage sludge/biomass (BCSSLW) on the persistence and bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soils with different properties. The results show that the content of organic solvent extractable PAHs decreases when biochar is applied to the soils, depending on pH and feedstock. Similarly, the content of freely dissolved PAHs also decreases. The bioavailability and persistence of PAHs in the biochar-amended soils are closely related to the chemical properties of the soils, as indicated by the significant relationships between PAH content and pH, cation exchange capacity, available nutrients, and dissolved organic carbon.
ENVIRONMENTAL POLLUTION
(2023)
Article
Green & Sustainable Science & Technology
Hengda Han, Aishu Li, Hanjian Li, Song Hu, Yi Wang, Limo He, Jun Xu, Xun Hu, Sheng Su, Jun Xiang
Summary: Calcium oxide has a significant impact on reducing the light substituted polycyclic aromatic hydrocarbons released from sewage sludge pyrolysis and inhibiting the formation of heavy ones. The mechanisms involve catalyzing or reacting with different components in the sludge model compounds to affect the content and formation of aromatics. The decrease in nitrogen substituted polycyclic aromatic hydrocarbons released from sludge can be attributed to the synergy effects of CaO and other minerals or the effects of CaO on the interaction between protein and other organics.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Li Lin, Lei Dong, Zhen Wang, Chao Li, Min Liu, Qingyun Li, John C. Crittenden
Summary: Lake Bangong Co in western Tibet is a unique lake with spatial differences in water chemistry characteristics. Most water quality parameters meet standards, but Cl- and SO42- concentrations in the western part exceed limits. PAHs and PAEs mainly come from biomass combustion and domestic waste, while metals originate from natural and anthropogenic sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Mozhdeh Alipour, Hossein Asadi, Chengrong Chen, Ali Asghar Besalatpour
Summary: The use of biochar and hydrochar as organic soil fertilizers is increasing in popularity, but little research has been done on the removal of organic pollutants. This study found that pyrolysis and hydrothermal carbonization are promising methods for removing organic pollutants from sludges, particularly with pyrolysis at high temperatures leading to complete removal of the pollutants.
Article
Environmental Sciences
Durga Prasad Patnana, B. P. Chandra, Pooja Chaudhary, Baerbel Sinha, Vinayak Sinha
Summary: Airborne particulate matter (PM) bound to hazardous pollutants like phthalic acid esters (PAEs) and polycyclic aromatic hydrocarbons (PAHs) poses a serious health threat. This study developed and validated an optimized method for simultaneous screening and quantification of PAEs and PAHs bound to ambient PM2.5. The method exhibited good linearity, precision, and recovery percentages. The study also investigated the seasonal variation and emission sources of these compounds at a measurement site in India. DEHP and B[b]F were found to be the most abundant PAE and PAH, respectively. The estimated cancer risk for adults and children due to exposure to DEHP and B[a]Peq exceeded the threshold value set by USEPA. This study highlights the importance of considering the health risks associated with exposure to PAEs and PAHs bound to PM2.5.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Environmental Sciences
Wenjing Shi, Hui Gong, Weiqi Zhou, Xuejun Tan, Chen Zhang, Xiaohu Dai
Summary: The objective of this study was to compare the distribution and ecological risk of PAHs in the sewage collection and treatment system of four cities in the middle and lower reaches of the Yangtze River. The results showed that the mean concentration of 16 sigma PAHs was higher in sewer sediments than in sewage sludge. The major sources of PAHs in sewage sludge were petroleum sources, coal tar, and coking activities, while PAHs in sewer sediments primarily came from wood combustion, automobile emissions, and diesel engine emissions. Both sewage sludge and sewer sediments had medium ecological risk based on the assessment of sigma PAHs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Tingting Liu, Lifeng Tian, Zhengang Liu, Jie He, Haihui Fu, Qifei Huang, Honghai Xue, Zechun Huang
Summary: Hydrothermal carbonization (HTC) of sewage sludge (SS) with and without calcium oxide (CaO) was conducted at temperatures ranging from 160 to 240 degrees Celsius. The study evaluated the yield and distribution of polycyclic aromatic hydrocarbons (PAHs), showing that temperature increase led to higher PAH concentration in hydrochar, while the addition of CaO reduced PAH yield with optimal results observed at 200 degrees Celsius with 3-6% CaO.
Article
Water Resources
Ewa Wisniowska, Maria Wlodarczyk-Makula
Summary: This study investigated the sorption capacity of microplastic fibers towards carcinogenic polycyclic aromatic hydrocarbons (PAHs) and found that microfibers can adsorb PAHs, leading to their accumulation in sewage sludge.
APPLIED WATER SCIENCE
(2022)
Article
Chemistry, Physical
Yan-Chao Chang, Xiao-Feng Xiao, Hua-Jun Huang, Yuan-Dong Xiao, Han-Sun Fang, Jin-Bao He, Chun-Huo Zhou
Summary: The study explores the transformation characteristics of polycyclic aromatic hydrocarbons (PAHs) during hydrothermal liquefaction (HTL) of sewage sludge. It is found that the increase of reaction time favors the formation of PAHs, but there are critical values for reaction temperature and solid-liquid ratio resulting in the lowest amounts of PAHs synthesized. Most PAHs are distributed in bio-oil, and compared to raw sludge, the total/leachable contents and toxic equivalent quantity (TEQ) of PAHs in biochar are reduced, suggesting a lower environmental risk.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Environmental Sciences
Can Luo, Jin Deng, Liangkai Chen, Qiang Wang, Yue Xu, Ping Lyu, Leilei Zhou, Yuxin Shi, Weifeng Mao, Xuefeng Yang, Guoping Xiong, Zhaoping Liu, Liping Hao
Summary: This study found that dietary patterns of pregnant women are associated with PAEs and PAHs exposure. The consumption of egg-dairy products, whole grain-tuber crops, and meat-aquatic products patterns may be related to increased exposure, while adhering to the fruit-nut-vegetable pattern may be associated with a lower burden of such exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
S. Ahmad Mokhtari, Mitra Gholami, Abdollah Dargahi, Mehdi Vosoughi
Summary: The research evaluated the treatability of polycyclic aromatic hydrocarbon compounds (PAHs) in urban and industrial sewage sludge using advanced chemical oxidation methods (persulfate-peroxide), showing effective elimination of PAH compounds. The study demonstrated that this method was successful in removing PAH compounds under different parameter conditions.
DESALINATION AND WATER TREATMENT
(2021)
Article
Environmental Sciences
Kunlong Hui, Beidou Xi, Wenbing Tan, Qidao Song
Summary: Soil is a crucial component of terrestrial ecosystems, providing nutrients and energy for organisms and facilitating various physical, chemical, and biological processes. Soil organic matter is particularly important for element cycling and the adsorption and degradation of soil pollutants. Long-term excessive application of nitrogen fertilizer can deteriorate the soil environment, alter organic matter properties, and affect the accumulation and adsorption of pollutants. This study examines the accumulation of polycyclic aromatic hydrocarbons (PAHs) in farmland soil due to long-term sewage irrigation and the response of PAHs accumulation to nitrogen fertilizer application. The findings highlight the potential risks and provide insights for managing PAHs pollution in sewage-irrigated areas.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Dan Zhang, Kai Zhou, Chenqi Liu, Xiujuan Li, Siyi Pan, Lan Zhong
Summary: This study investigated the dissipation, uptake, translocation, and accumulation of phthalic acid esters (PAEs) in a sediment-Zizania latifolia system. The results showed that the dissipation rates of PAEs in sediment were positively correlated with exposure time, and all five PAEs could be taken up by roots from contaminated sediment and transported into stems and leaves. Different PAEs exhibited different uptake and translocation behaviors in plant tissues, which were significantly correlated to their physicochemical properties. The accumulation of PAEs in edible parts was influenced by various factors.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)