Bioresource Technology最新文献_第7页

Harnessing an adapted strain of Clostridium carboxidivorans to unlock hexanol production from carbon dioxide and hydrogen in elevated-pressure stirred tank reactors 利用一种适应的碳梭菌菌株，在高压搅拌罐式反应器中从二氧化碳和氢气中释放己醇。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131966

G. Antonicelli , N. Vasile , E. Piro , S. Fraterrigo Garofalo , B. Menin , F. Verga , F. Pirri , V. Agostino

{"title":"Harnessing an adapted strain of Clostridium carboxidivorans to unlock hexanol production from carbon dioxide and hydrogen in elevated-pressure stirred tank reactors","authors":"G. Antonicelli , N. Vasile , E. Piro , S. Fraterrigo Garofalo , B. Menin , F. Verga , F. Pirri , V. Agostino","doi":"10.1016/j.biortech.2024.131966","DOIUrl":"10.1016/j.biortech.2024.131966","url":null,"abstract":"<div><div>To successfully scale-up the production of bio-based building blocks through CO<sub>2</sub> and H<sub>2</sub>-based gas fermentation, it is crucial to deeply understand and control the microbial catalyst response to the bioreactor environment. This study investigates the effects of key process parameters, such as CO<sub>2</sub> and H<sub>2</sub> partial pressures, gas feeding strategies, and mixture composition, on the production pathways of an evolved <em>Clostridium carboxidivorans</em> strain. The ultimate goal is to optimize 1-hexanol production in elevated-pressure stirred-tank reactors. Continuous gas feeding enhanced acetogenic and solventogenic metabolisms, while gas-limited conditions promoted chain elongation to caproic acid. An optimized process, combining an initial gas-limited step followed by a continuous gas phase, increased 1-hexanol production, achieving a maximum biomass-specific productivity of 0.9 g g<sub>CDW</sub><sup>−1</sup> day<sup>−1</sup>. In-situ product extraction improved 1-hexanol carbon selectivity to an unprecedented 60 %. These findings demonstrate the potential of CO<sub>2</sub> and H<sub>2</sub>-fed fermentation to produce high-value chemicals other than ethanol and acetate.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131966"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fueling the protein transition: Can waste-derived ethanol enable efficient and high-quality microbial protein production? 促进蛋白质转化：废物衍生乙醇能否实现高效、高质量的微生物蛋白质生产？

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131990

L. Van Peteghem , S. Matassa , M. Sakarika

{"title":"Fueling the protein transition: Can waste-derived ethanol enable efficient and high-quality microbial protein production?","authors":"L. Van Peteghem , S. Matassa , M. Sakarika","doi":"10.1016/j.biortech.2024.131990","DOIUrl":"10.1016/j.biortech.2024.131990","url":null,"abstract":"<div><div>Meeting the protein needs of a growing population will require significant resources. In this context, microbial protein (MP) offers a nutritious and versatile protein source from recovered resources. This <em>meta</em>-analysis of over 100 studies examines the efficiency and nutritional quality of MP production using ethanol. Ethanol, a feedstock derived from CO<sub>2</sub> and biological waste, is used by various microorganisms, and has an established role in the food sector. Results show that ethanol-based MP production is technically feasible for food applications, reaching biomass concentrations of 14–230 g/L and productivities of 11–13 g/L/h. The protein content of MP correlates with productivity, and the nutritional quality of ethanol-grown MP matches common sources like pork and tofu. Lastly, operational choices affect the techno-economic feasibility of using waste-derived ethanol and other recovered resources. This <em>meta</em>-analysis highlights the potential of ethanol-grown MP, though further research is needed to close existing knowledge gaps.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131990"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of dewatering performance and effective degradation of petroleum hydrocarbons in biological oily sludge using atmospheric pressure plasma jet 常压等离子体射流提高生物含油污泥脱水性能及有效降解石油烃。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131974

Pengcheng Xia, Siyi Jing, Zhenqing Zhao, Tongtong Dou, Jie Gao, Ziyi Guo, Lijie Xu, He Guo, Ming Zhang, Weichuan Qiao

{"title":"Enhancement of dewatering performance and effective degradation of petroleum hydrocarbons in biological oily sludge using atmospheric pressure plasma jet","authors":"Pengcheng Xia, Siyi Jing, Zhenqing Zhao, Tongtong Dou, Jie Gao, Ziyi Guo, Lijie Xu, He Guo, Ming Zhang, Weichuan Qiao","doi":"10.1016/j.biortech.2024.131974","DOIUrl":"10.1016/j.biortech.2024.131974","url":null,"abstract":"<div><div>The presence of petroleum hydrocarbon components (PHCs) in biological oily sludge increases the toxicity of the sludge and makes dewatering even more difficult. In this study, an atmospheric pressure plasma jet (APPJ) technology was used for treating biological oily sludge. The results showed that under specific conditions—a sludge/water ratio of 1:100, a discharge power of 440 W, and a 60-min treatment—the degradation rate of PHCs reached 36.3 %. APPJ can convert larger molecule PHCs and extracellular polymeric substances, thereby reducing the particle size and viscosity of the sludge. Meanwhile, the sludge volume was reduced and the sludge dewatering efficiency was improved. The hydroxyl radical and superoxide radical generated by APPJ were the main active species involved in the degradation process. This work provides a novel strategy for the reduction of biological oily sludge and the synergistic removal of PHCs along with the sludge.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131974"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combining Tenebrio molitor frass with inorganic nitrogen fertilizer to improve soil properties, growth parameters, and nutrient content of Sonchus oleraceus crop 粉黄草与无机氮肥配合施用改善青豆作物土壤性质、生长参数和养分含量。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131901

Anestis Karkanis , Georgia Ntatsi , Evangelia Vasilakakou , Ioannis Karavidas , Theodora Ntanasi , Christos I. Rumbos , Christos G. Athanassiou

{"title":"Combining Tenebrio molitor frass with inorganic nitrogen fertilizer to improve soil properties, growth parameters, and nutrient content of Sonchus oleraceus crop","authors":"Anestis Karkanis , Georgia Ntatsi , Evangelia Vasilakakou , Ioannis Karavidas , Theodora Ntanasi , Christos I. Rumbos , Christos G. Athanassiou","doi":"10.1016/j.biortech.2024.131901","DOIUrl":"10.1016/j.biortech.2024.131901","url":null,"abstract":"<div><div>This study evaluates the impact of yellow mealworm frass in combination with an inorganic nitrogen fertilizer on growth, yield, and nutrient concentration in annual sowthistle plants. It was found that the combined application of yellow mealworm frass (YM-frass) as basal fertilizer and inorganic nitrogen fertilizer (INF) as top dressing increased the shoot biomass of annual sowthistle up to 67.2 % compared to the INF treatment (100 kg N/ha). The application of both YM-frass and INF increased P, Mg and Fe root concentration. Moreover, the lowest P and K concentration in shoot tissues were found in the unfertilized control treatment, while the reverse was the case for Ca and Fe. In conclusion, yellow mealworm frass can be used instead of inorganic basal fertilizer, whereas its combination with an inorganic nitrogen fertilizer applied as top-dressing during the vegetative growth can increase the yield and quality of leafy vegetables.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131901"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High organic volumetric loading rates triggered heterotrophic nitrification in wastewater biological nutrient removal systems

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2025.132132

Mengya Guo, Xiangnan Zheng, Shaokui Zheng, Xiaojie Luo, Zhixuan Wang

{"title":"High organic volumetric loading rates triggered heterotrophic nitrification in wastewater biological nutrient removal systems","authors":"Mengya Guo, Xiangnan Zheng, Shaokui Zheng, Xiaojie Luo, Zhixuan Wang","doi":"10.1016/j.biortech.2025.132132","DOIUrl":"10.1016/j.biortech.2025.132132","url":null,"abstract":"<div><div>This study confirmed the importance of a higher chemical oxygen demand (COD) volumetric loading rate (COD<sub>LR</sub>) for triggering heterotrophic nitrification in a lab-scale anoxic/microaerobic biological nutrient removal system for sewage treatment by analyzing the ammonia-oxidizing activities, nitrogen mass balance, and ammonia-oxidizing bacterial communities at four COD<sub>LR</sub> levels: 0.50 (Phase A), 0.75, 1.10, and 1.50 (Phase D) kg COD m<sup>−3</sup> d<sup>−1</sup>. A higher COD<sub>LR</sub> led to a significant increase in the potential heterotrophic nitrification activity by 0.4, 0.9, 1.1, and 1.6 mg NH<sub>4</sub><sup>±</sup>-N/g mixed liquor suspended solids h<sup>−1</sup>, respectively, contributing 7 %, 14 %, 17 %, and 21 % of the ammonia oxidization in the anoxic/microaerobic system. Furthermore, nitrogen balance analysis revealed that heterotrophic nitrifying bacteria contributed 4 % and 12 % of the ammonia oxidization in the anoxic/microaerobic system during Phases A and D, respectively, and that a more plentiful organic carbon supply in the microaerobic zone stimulated heterotrophic nitrification during Phase D.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"421 ","pages":"Article 132132"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trace concentrations of graphene oxide and magnetic graphene oxide rescue anaerobic municipal sludge digesters under stress 微量氧化石墨烯和磁性氧化石墨烯在压力下拯救厌氧城市污泥消化器

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131936

Milad Goodarzi , Mohammad Arjmand , Cigdem Eskicioglu

{"title":"Trace concentrations of graphene oxide and magnetic graphene oxide rescue anaerobic municipal sludge digesters under stress","authors":"Milad Goodarzi , Mohammad Arjmand , Cigdem Eskicioglu","doi":"10.1016/j.biortech.2024.131936","DOIUrl":"10.1016/j.biortech.2024.131936","url":null,"abstract":"<div><div>This study evaluated long-term performance of graphene oxide (GO) and magnetic GO (MGO) nanosheets in semi-continuous-flow anaerobic digestion (AD) of municipal sludge over 230 days. At organic loading rates (OLRs) of 2.6 and 3.4 g chemical oxygen demand (COD)<sub>fed</sub>/L/day, 20 and 200 mg/L of GO and MGO did not affect AD performance. However, at an OLR of 5.2 g COD<sub>fed</sub>/L/day, where control digesters failed, 20 and 200 mg/L of GO and MGO sustained biogas yields at 190 mL/g COD<sub>fed</sub>/day, similar to yields at lower OLRs (2.6 and 3.4 g COD<sub>fed</sub>/L/day). This performance persisted after thedaily nanosheet replenishment stopped. Improvements were due to enhanced conductivity and microbial syntropy. The results showed a strong correlation with previous biochemical methane potential (BMP) assays, positioning BMP as a predictive tool for continuous-flow AD performance. Overall, this study demonstrated potential of GO/MGO nanosheets to improve the stability and efficiency of AD systems under stress.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131936"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ purification of ammonium nitrogen wastewater in rare earth mine by native bacteria isolating from original mining area 从矿区分离原生细菌对稀土矿氨氮废水进行原位净化。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131942

Xu Guo , Yongjin He , Youcai Zhou , Yulin Lai , Ming Li , Guanglu Huang , Bilian Chen , Mingzi Wang

{"title":"In situ purification of ammonium nitrogen wastewater in rare earth mine by native bacteria isolating from original mining area","authors":"Xu Guo , Yongjin He , Youcai Zhou , Yulin Lai , Ming Li , Guanglu Huang , Bilian Chen , Mingzi Wang","doi":"10.1016/j.biortech.2024.131942","DOIUrl":"10.1016/j.biortech.2024.131942","url":null,"abstract":"<div><div>Ammonium sulfate ((NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>) leaching method to extract rare earth elements (REEs) of mine has produced a large amount of NH<sub>4</sub><sup>+</sup>-N-enriched wastewater derived from ore body, leading to many serious environmental pollution problems. This study was the first time to establish an in-situ treatment for real REEs wastewater outside and inside the ore body by an isolated indigenous microorganism. The results stated that <em>Citrobacter</em> sp. X-9 achieved the highest NH<sub>4</sub><sup>+</sup>-N removal efficiency among the isolated six microbial strains. Moreover, the microbe to treat the REEs wastewater outside ore body gave the greatest NH<sub>4</sub><sup>+</sup>-N removal efficiency under the optimized conditions in the Erlenmeyer flask (250-mL) and bioreactor (10-L). Furthermore, compared to the others’ modes, the in-situ treatment by cyclic mode with <em>Citrobacter</em> sp. X-9 possessed superior performance in NH<sub>4</sub><sup>+</sup>-N removal efficiency for wastewater inside of ore body, showing that the established in-situ treatment was the potential approach for REEs wastewater purification.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131942"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Agro-industrial residue torrefaction to bio-coal: Its physico-chemical characterization and potential applications in energy and environmental protection 农工渣热解制生物煤：理化性质及其在能源和环境保护方面的潜在应用。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131948

Nidhi Yadav , Gaurav Yadav , Vishnu Bakthavachalam , Lakshmanan Potturaja , Joy K. Roy , Sasikumar Elumalai

{"title":"Agro-industrial residue torrefaction to bio-coal: Its physico-chemical characterization and potential applications in energy and environmental protection","authors":"Nidhi Yadav , Gaurav Yadav , Vishnu Bakthavachalam , Lakshmanan Potturaja , Joy K. Roy , Sasikumar Elumalai","doi":"10.1016/j.biortech.2024.131948","DOIUrl":"10.1016/j.biortech.2024.131948","url":null,"abstract":"<div><div>Leveraging biofuel derived from biomass stands as a pivotal strategy in reducing CO<sub>2</sub> emissions and mitigating the greenhouse effect. Biomass serves as a clean, renewable energy source, offering inherent benefits. However, despite its advantages, biomass encounters obstacles hindering its widespread industrial applications, including its relatively low calorific value, limited grindability, high water content, and susceptibility to corrosion. The torrefaction process has garnered significant attention as an effective method for enhancing the quality of raw biomass for energy production. In this review, we briefly discussed the mechanism of bio-coal preparation using biomass, physico-chemical characterization of different torrefied feedstocks, and the effect of torrefaction parameters, along with the effect of the different types of reactors on biomass torrefaction. Furthermore, bio-coal’s emission characteristics and fuel quality throughout the thermal treatment have been covered. Thus, bio-coal finds a wide range of applications in sustainable energy generation, environmental remediation, agri-food development, polymer composites, and others.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131948"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous removal of organic matter and inorganic nitrogen in Baijiu wastewater by methanotrophic denitrification 甲醇营养反硝化法同时去除白酒废水中的有机物和无机氮。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131956

Zhaohan Chu , Xin Tang , Yancheng Li , Jiang Li , Wei Xiong , Yaohua Yin , Xinglin Pan

{"title":"Simultaneous removal of organic matter and inorganic nitrogen in Baijiu wastewater by methanotrophic denitrification","authors":"Zhaohan Chu , Xin Tang , Yancheng Li , Jiang Li , Wei Xiong , Yaohua Yin , Xinglin Pan","doi":"10.1016/j.biortech.2024.131956","DOIUrl":"10.1016/j.biortech.2024.131956","url":null,"abstract":"<div><div>Methanotroph could facilitate nitrogen removal during methane oxidation, and promote conversion of organic compounds by producing methane monooxygenase. Co-metabolic effect and mechanism of aerobic methane oxidation on the removal of nitrogen and organic matter from Baijiu wastewater were investigated using an improved denitrifying biological filter. It was found that the average removal efficiency of chemical oxygen demand (COD), total nitrogen (TN) and chroma increased by 17 %, 22 % and 10 % in reactor B with methane compared to reactor A with air only. Three-dimensional fluorescence spectroscopy and Fourier transform infrared spectroscopy analysis revealed that methanotroph co-metabolism was accompanied by eliminating nitrogen and organic matter as well as forming alcohol compounds. Metagenomic analyses revealed that <em>Methylocaldum</em>, the dominant genera in Reactor B, exerted a pivotal role in removing nitrogen and organic matter removal by supplying energy and catalysis. Functional genes <em>pmoABC-amoABC</em> could facilitate nitrogen and organic matter removal.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131956"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harnessing the rhizosphere sponge to smooth pH fluctuations and stabilize contaminant retention in biofiltration system 利用根瘤海绵平缓 pH 值波动，稳定生物过滤系统中的污染物滞留。

IF 9.7 1区环境科学与生态学

Bioresource Technology Pub Date : 2025-02-01 DOI: 10.1016/j.biortech.2024.131971

Guoliang Wang , Tianying Chi , Ruixiang Li , Tian Li , Xiaolin Zhang

{"title":"Harnessing the rhizosphere sponge to smooth pH fluctuations and stabilize contaminant retention in biofiltration system","authors":"Guoliang Wang , Tianying Chi , Ruixiang Li , Tian Li , Xiaolin Zhang","doi":"10.1016/j.biortech.2024.131971","DOIUrl":"10.1016/j.biortech.2024.131971","url":null,"abstract":"<div><div>Fluctuating pH conditions can affect heavy metal mobility, thereby limiting the efficiency of biofiltration systems (BS). To address this, we developed an innovative rhizosphere sponge, biochar-based bioreactor (RBB), designed to stabilize Cd<sup>2+</sup> removal across a pH range of 5 to 9. RBB consistently outperformed the control, achieving a notable 91.3 % Cd<sup>2+</sup> removal at pH 5. By creating optimized oxygen and redox zoning, the rhizosphere sponge enhanced both biochar surface reactions and microbial activity. Under acidic conditions, biochar facilitated Fe<sup>2+</sup>/Mn<sup>2+</sup> precipitation into stable (oxy)hydroxides, a process further driven by microbial oxidation. Consequently, RBB accumulated 1.54 times more Fe-Mn oxide-bound Cd than the control, effectively reducing Cd<sup>2+</sup> mobility. Additionally, loosely bound extracellular polymeric substances claimed preferential Cd<sup>2+</sup> sequestration after acidification. The stabilized microecology and increased ecological niches, allowing RBB to better buffer against pH fluctuations, presenting it as a robust solution for sustainable heavy metal remediation in variable environments.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"418 ","pages":"Article 131971"},"PeriodicalIF":9.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0