مقاله انگلیسی رایگان در مورد حذف موثر فلزات سنگین با هم افزایی میکروارگانیسم ها – الزویر ۲۰۲۰

elsevier

 

مشخصات مقاله
ترجمه عنوان مقاله حذف موثر فلزات سنگین با اقدامات هم افزایی میکروارگانیسم ها و ملاس های زباله
عنوان انگلیسی مقاله Efficient removal of heavy metals by synergistic actions of microorganisms and waste molasses
انتشار مقاله سال ۲۰۲۰
تعداد صفحات مقاله انگلیسی ۹ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research Article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) Scopus – Master Journals List – JCR – MedLine
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۶٫۹۶۳ در سال ۲۰۱۹
شاخص H_index ۲۵۱ در سال ۲۰۲۰
شاخص SJR ۲٫۱۵۷ در سال ۲۰۱۹
شناسه ISSN ۰۹۶۰-۸۵۲۴
شاخص Quartile (چارک) Q1 در سال ۲۰۱۹
مدل مفهومی ندارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط شیمی
گرایش های مرتبط شیمی محیط زیست، شیمی تجزیه، شیمی معدنی
نوع ارائه مقاله
ژورنال
مجله  فناوری منابع زیستی – Bioresource Technology
دانشگاه Key Laboratory of Catalysis Conversion and Energy Materials Chemistry of Ministry of Education, PR China
کلمات کلیدی فلزات سنگین، میکروارگانیسم، ملاس های زباله، حذف بیولوژیکی
کلمات کلیدی انگلیسی Heavy metal، Microorganism، Waste molasses، Biological removal
شناسه دیجیتال – doi
https://doi.org/10.1016/j.biortech.2020.122797
کد محصول E14434
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract

۱- Introduction

۲- Materials and methods

۳- Results and discussion

۴- Conclusion

References

بخشی از متن مقاله:

Abstract

In this study, two bacteria strains (Enterobacter sp. SL and Acinetobacter sp. SL-1) and waste molasses (carbon source) were used to remove Zn(II), Cd(II), Cr(VI), and Cr(Total) in the liquid solution (87 mg·L). The results showed the removal efficiencies of Cr(Total) and Cr(VI) could reach over 98.00% after reaction, and the removal efficiencies of Zn(II) and Cd(II) were all about 90.00% by the synergistic actions of microorganisms and waste molasses. In this process, waste molasses provides nutrients for microorganisms and has the characteristics and capability of Cr, Zn, and Cd. Microorganisms mainly use biological adsorption (36.95% and 45.69%) and metabolism (24.37% and 17.05% by producing humic-acid and fulvic-acid like substances) to remove Zn(II) and Cd(II), while waste molasses could to remove Cr(Total) (81.24%) and Cr(VI) (75.90%). This study has potential application value for the treatment of wastewater containing high concentrations of heavy metals.

Introduction

Heavy metal-containing wastewaters are produced in many industries, and their direct discharge has caused serious impacts on human health and environment (Zhu et al., 2018). The popular methods for treatment of heavy metal-containing wastewater include the ion exchange method (Dai et al., 2015), electrochemical method (Kobya et al., 2017), photocatalysis (Luo et al., 2017), and biological method (Wen et al., 2018). Among them, biological method has been widely studied due to the low energy consumption, small secondary pollution, and environmental friendliness. (Zhou et al., 2013). However, applying survivable microbes for biological treatments in toxic environments has become the main challenge (Pradhan et al., 2019) because heavy metal-containing wastewater not only has complex heavy metal compositions but also may contain other toxic substances such as cyanide (a phenolic organic matter) (Wen et al., 2018). In addition, the characteristics of heavy metal-containing wastewater may vary moderately; especially the change of pH can significantly inhibit the bacterial activities (Alexandrino et al., 2014). Moreover, biological treatments of heavy metals normally have been used for low concentration ranges (10–۵۰ mg·L−۱) of heavy metals (Guo et al., 2017), and some bacteria can only work with specific single heavy metal [e.g., Zn(II) or Cr(VI)] in the wastewater (Peng et al., 2019; Singh et al., 2011; Wang et al., 2018). Due to the high concentration of heavy metals on microbial stress, it is extremely difficult for microorganisms to remove many kinds of heavy metals simultaneously (Dhal et al., 2013; Guo et al., 2017). Therefore, previous studies have used chemical pretreatment (Mejias Carpio et al., 2016) or the addition of substances such as iron ore (Guo et al., 2017) to reduce heavy metal content or toxicity. Although these methods can improve the activity of microorganisms, they also bring trouble to the subsequent treatment of the final effluent. Alexandrino et al. (2014) and Yan et al. (2018) applied a high concentration of sodium lactate (7.0 g·L−۱) as a carbon source to stimulate bacteria growth and heavy metal removal. However, these expensive carbon sources burden wastewater treatment (Li et al., 2019; Wang et al., 2018). In addition, it has been reported that microorganisms need specific nutrient composition to be able to function, and the complex wastewater system (containing heavy metals) will inhibit its activity (Mejias Carpio et al., 2016; Peng et al., 2019; Pradhan et al., 2019). Therefore, biotreatments are usually limited in industrial application due to the multi heavy metals contained wastewater. So, it is important that to develop an economic biotreatment method with multi heavy metals tolerance performance. Moreover, it is critical to differentiate the contributions of biotic (e.g., via microbial metabolisms) and abiotic (the chemical properties of the carbon source) reactions for heavy metals removal in complex wastewater system.

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