JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Jianbo Jiang,Jichang Wen,Ruijia Yang,Haixia Yang,Shikai Yang
Long-term mining activities in the mercury-thallium mining area of Lanmuchang, southwestern China, resulting in contamination of surrounding soils with complex toxic elements such as Tl, As, Sb, Hg, and Cd. While manure aids in pollution control and soil fertilization, its impact on Tl bioavailability in soil remains incompletely understood. This study explored the physiological changes and Tl accumulation in Capsicum annuum under combined pollution stress and application of livestock and poultry manure near the Lanmuchang mining area. The results showed that chicken manure promoted Tl accumulation in Capsicum annuum , whereas pig and cattle manure inhibited it, with pig manure exhibiting the strongest inhibitory effect. Both pig and cattle manure reduced the transpiration rate of Capsicum annuum , which decreased the driving force for Tl transport to the plant's upper parts. Additionally, manure increased organic acid secretion in Capsicum annuum roots and decreased soil Eh. This led to a reduction in Tl 3+ to the more stable Tl + , which decreased the content of exchangeable Tl form and its activity. Pig manure significantly reduced Tl content in stems, leaves, and fruits by increasing the area of the Casparian bands in Capsicum annuum roots, which hindered Tl accumulation. In contrast, chicken manure had the opposite effect. The findings of this study provide important theoretical support for scientifically guiding agricultural production safety in areas contaminated with the heavy metal Tl.
研究领域:
环境科学
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植物生理学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Ze Deng,Jiajia Cheng,Yaqi Zhang,Yue Zhao,Zimin Wei,Caihong Song
The composting of livestock manure produces a significant amount of hydrogen sulfide (H 2 S), which can cause environmental pollution. This has become a substantial impediment to the advancement of the composting industry. In this study, Cystathionine gamma-lyase (CSE) and Cystathionine beta-synthase (CBS) enzymes were explored from the perspective of endogenous H 2 S production. This study investigated aminooxyacetic acid (AOAA) and DL-propargylglycine (PAG) as enzyme inhibitors in composting to assess the feasibility and effectiveness of H 2 S emission reduction from chicken and swine manure. The results showed that the treatment groups reduced the cumulative H 2 S emissions by a minimum of 33.52% and a maximum of 72.11%. The CSE and CBS-mediated H 2 S production reaction was inhibited by AOAA and PAG, which resulted in a significant reduction ( P < 0.05) in H 2 S emission during composting and a considerable decrease in the loss of sulfur components in gaseous form. Furthermore, the addition of AOAA and PAG affected the genes related to organic sulfur metabolism and the sulfur metabolism cycle network. This study is the first to investigate the addition of two enzyme inhibitors in composting, examining the mechanisms at different levels. These results provide new insights into the compost management strategies for the reduction of H 2 S emissions. This is a crucial area of research for the reduction of environmental pollution and the advancement of the composting industry.
研究领域:
环境科学
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生物化学
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农业工程
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微生物学
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污染控制
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DOI
PubMed
高影响因子
Sustainability
·
2021
·Vol. 13
·期 11
·6262
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IF 3.251
Lianghu Su,Mei Chen,Guihua Zhuo,Rongting Ji,Saier Wang,Longjiang Zhang,Mingzhu Zhang,Haidong Li
As a potential adsorbent material, loose, porous livestock manure biochar provides a new approach to livestock manure resource utilization. In this study, coconut husks (CH) and livestock manure, i.e., cow dung (CD), pig manure (PM), and chicken manure (CM) were used as biomass precursors for preparation of biochar via high-temperature pyrolysis and CO2activation. Characterization technologies, such as scanning electron microscopy, Fourier transform infrared spectroscopy, adsorption–desorption isotherms, and pore size distributions, were used to study the microscopic morphologies and physicochemical properties of unactivated and activated biochar materials. The results showed that CD biochar provides better adsorption performance (up to 29.81 mg H2S/g) than CM or PM biochar. After activation at 650° for 1 h, the best adsorption performance was 38.23 mg H2S/g. For comparison, the CH biochar removal performance was 30.44 mg H2S/g. Its best performance was 38.73 mg H2S/g after 1 h of activation at 750 °C. Its best removal performance is equivalent to that of CH biochar activated at a temperature that is 100 °C higher. Further material characterization indicates that the H2S removal performance of livestock-manure–derived biochar is not entirely dependent on the specific surface area, but is closely related to the pore size distribution.Keywords:livestock manure;Biochar;physical activation;hydrogen sulfide removal
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2021
·Vol. 29
·期 4
·6237-6250
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IF 4.223
Chen Xi,Lin Hai,Dong Yingbo,Li Bing,Yin Tingting,Liu Chenjing
The complex mixtures of antibiotics and heavy metals are commonly existed in livestock and poultry breeding wastewater. Effective and simultaneous removal of these toxic compounds by microorganisms, especially single strains, remains a considerable challenge. In this study, a novel functional strain SDB4, isolated from duck manure and identified as Bacillus sp., has been shown to possess high removal capabilities for both sulfamethoxazole (SMX) and Zn 2+ . The maximum removal efficiency achieved 73.97% for SMX and 84.06% for Zn 2+ within 48 h in the single pollution system. It has great potential for eliminating SMX along with Zn 2+ , 78.45% of SMX and 52.91% of Zn 2+ were removed in the 20 mg·L -1 SMX and 100 mg·L -1 Zn 2+ binary system. Furthermore, the SMX-biotransformation capability of SDB4 was enhanced at low concentrations of Zn 2+ (below 100 mg·L -1 ). The SMX biotransformation and Zn 2+ adsorption data fitted well with the pseudo-first-order kinetic model, indicating that the two pollutants were in accordance with the same removal rule. N 4 -acetyl-SMX was identified as the main stable transformation product during SMX removal. FTIR analyses revealed that OH, NH 2 , C=O, C-N/N-H, and C-O-C played major roles in the adsorption of Zn 2+ . Our study of the dually functioning strain SDB4 provides a potential application for the simultaneous biological removal of antibiotics and heavy metals.
研究领域:
环境微生物学
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废水处理
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生物修复
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DOI
PubMed
高影响因子
PLoS One
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2025
·Vol. 20
·期 8
·e0331575
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IF 2.6
Yu Jin,Haifeng Wu,Shuai Huo,Siyu Chen,Lili Shen,Hongjie Di,Lianfeng Du,Peng Li
Livestock and poultry farming effluents (LPFE) have become a significant source of pollution in the agricultural water environment, with nitrogen (N) and phosphorus (P) being the major pollutants. The use of inexpensive Mg2 + -modified materials as crystallization carriers can enhance the struvite crystallization and precipitation reaction, enabling efficient recovery of N and P nutrients from LPFE. In this study, Mg2 + -modified corncob biochar (CCBC-Mg) and Mg2 + -modified natural zeolite (NZ-Mg) were assessed for their simultaneous recovery of N and P from LPFE. BET, SEM-EDS, FTIR, XRD and adsorption isotherm and adsorption kinetics modelling were used to study the N and P adsorption properties and mechanisms. The results showed that Mg2 + modification significantly enhanced the simultaneous ammonia nitrogen (AN) and total phosphorus (TP) recovery of the two materials. After modification, corncob biochar (CCBC-Mg) showed the best P recovery performance, while natural zeolite (NZ-Mg) showed the best AN recovery, with adsorption quantities reaching 116.99 mg/g and 47.50 mg/g, respectively. The findings demonstrated that the adsorption processes for both AN and phosphate across all materials adhered to the pseudo-second-order kinetic model and Langmuir isotherm, collectively indicating that monolayer adsorption governed by chemical interactions was the predominant mechanism. CCBC and NZ mainly adsorbed AN and TP by electrostatic attraction and ion exchange, whereas CCBC-Mg and NZ-Mg, mainly relied on struvite precipitation on the material surface. The Mg2 + - modification increased the solution pH and formed Mg-P precipitates on the material surface, providing a favourable alkaline environment and nucleation conditions for the struvite reaction, thereby promoting the simultaneous recovery of AN and TP by the materials. This study could provide a theoretical basis for the design of struvite carrier for the simultaneous recovery of AN and TP from LPFE by the struvite precipitation method, and promote the application of this process in livestock and poultry farming effluent treatments.
研究领域:
环境科学
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农业工程
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水处理
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材料科学
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污染控制
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2024
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IF 7.7
Wenfei Ding,Zhaoyi Mo,Jia Qi,Mengying Wang,Junyu Zou,Kuo Wang,Daxiang Gong,Yongju Zhao,Hong Miao,Zhongquan Zhao
Cr(Ⅵ) residues in livestock and poultry wastewater are a rising concern for human health and biotic environments. For the removal of Cr(Ⅵ), its simultaneous reduction and adsorption represents a sustainable and efficient strategy. Herein, iron nodes on covalently bonded two-dimensional phthalocyanine organic polymer (PcOP-Fe) nanosheets with space-separated dual-active sites are developed for the simultaneous detection and removal of Cr(VI) from wastewater. In the FeN 4 structure of PcOP-Fe nanosheets, Fe acts as an electron capture center, effectively facilitating the accumulation of photogenerated electrons and transferring them to Cr(VI), thereby achieving its photocatalytic reduction. Meanwhile, pyrrolic nitrogen provides excellent adsorption sites, enabling the adsorption of Cr(III) or Cr(0). Fe accumulates the photogenerated electrons from pyrrole N and transfer them to Cr(Ⅵ). The formation of N-Cr(Ⅲ) bonds causes a space-separation between Cr(Ⅵ) and Cr(III). In addition, PcOP-Fe can be used for a Cr(Ⅵ) detection agent. The photoluminescence intensity decreases linearly with increasing Cr(Ⅵ) concentration from 80 μM to 2 mM, with a limit of detection of 0.18 μM. The PcOP-Fe nanosheets exhibit good Cr(Ⅵ) detection and reduction performance in livestock and poultry wastewater, suggesting their suitability for practical sensing applications. Thus, the PcOP-Fe nanosheets with space-separated dual-active sites are promising for the simultaneous detection and removal of Cr(Ⅵ) in water treatment processes.
研究领域:
环境科学
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材料科学
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化学
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水处理
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jiahua Liu,Zengjun Yang,Khinkhin Phyu,Yu’ang Cao,Han Wang,Xiaoyu Xu,Junfeng Liang,Keqiang Zhang,Chein-Chi Chang,Suli Zhi
Microalgal biofilm can remove nutrients and refractory pollutants from livestock wastewater, transforming them into biomass or fuel. However, these applications are hampered by biofilm shedding. Coculture enhances effects, and its influence on the adhesion of attached microalgal biofilms requires exploration. In this study, two unicellular algae, Euglena (E) and Chlorella pyrenoidosa (C). and two filamentous algae, Klebsodium sp. (K) and Phormidium sp. (P) , were paired two by two, aiming to investigate the effect of mixing on the adhesion of microalgal biofilm. The results showed that suitable microalgal combinations significantly enhanced the performance of the co-cultured microalgal biofilm. Biomass enhancement of 35 % and 21.9 % was observed in the PC group compared to the individual P and C groups, respectively. The content of tightly bound extracellular polymeric substances (TB-EPS) and its protein and polysaccharide content significantly correlating with the net biomass increase in all treatments, p < 0.05 . Furthermore, measurement of zeta potentials and water contact angles indicated that alterations in protein secondary structures contributed to a lower intermolecular repulsion and greater hydrophobicity of the TB-EPS, which together with the stability provided by the higher β-glucan content supported the adhesion of the co-cultured microalgal biofilm.
研究领域:
环境科学
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微生物学
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生物技术
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废水处理
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DOI
高影响因子
Environmental Technology & Innovation
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2022
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IF 7.758
Lei Li,Qingfeng Chen,Changsheng Zhao,Beibei Guo,Xiaoya Xu,Ting Liu,Lingxi Zhao
Livestock wastewater is an important source of agricultural non-point pollution, causes serious pollution to water bodies. At the same time, corn straw is also an important agricultural waste , and its resource utilization has been the focus of global attention. The novel biochar material made from corn stalk can be used to treat livestock wastewater, which is helpful to control agricultural non-point source pollution and improve the efficiency of agricultural waste resource utilization. A novel chitosan modified magnesium impregnated corn straw biochar (CS-MgCBC) was synthetic for the removal of NH 4 + -N and PO 4 3 − -P from livestock wastewater. The experiments results show that the adsorption of NH 4 + -N and PO 4 3 − -P by CS-MgCBC is more consistent with the second-order kinetic model and Langmuir model, and the maximum Langmuir adsorption capacity for NH 4 + -N (35.59 mg/g) and PO 4 3 − -P (221.89 mg/g), compared with other studies on NH 4 + -N and PO 4 3 − -P adsorption, the average maximum adsorption capacity of CS-MgCBC has been improved 48.3% and 68.9%. When pH = 6 and pH = 9, the adsorption effect of PO 4 3 − -P and NH 4 + -N can be reached 99.6% and 48.4%, respectively. The chitosan modification increased the surface area, and abundance of functional groups (-OH, -CH 3 , -NH 2 , etc.) on the surface of biochar, thus improving the adsorption capacity of CS-MgCBC. The electrostatic adsorption, precipitation, and ligands exchange were the main mechanisms in the sorption of NH 4 + -N and PO 4 3 − -P on CS-MgCBC. Excellent adsorption capacity and environmental-friendliness made CS-MgCBC an efficient adsorbent for the removal of NH 4 + -N and PO 4 3 − -P in livestock wastewater.
研究领域:
环境科学
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废水处理
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生物炭技术
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农业废弃物管理
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污染控制
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）