نتایج جستجو برای: micp curves

تعداد نتایج: 93601  

2016
Mengmeng Li Xuejiao Zhu Stephenson Wilkinson Minsheng Huang Varenyam Achal

Recent advances in biotechnology have allowed the study of new bacterial strains, which can produce enzymes that can be used in the bioremediation of heavy metals. Microbially induced carbonate precipitation (MICP) is a recent well-recognized process that has the potential to precipitate heavy metals, mainly those with a valency of +2 (Kumari et al., 2016). There are two enzymes, urease, and ca...

Journal: :FEMS microbiology ecology 2015
Tugba Onal Okyay Debora F Rodrigues

In this study, CO2 sequestration was investigated through the microbially-induced calcium carbonate precipitation (MICP) process with isolates obtained from a cave called 'Cave Without A Name' (Boerne, TX, USA) and the Pamukkale travertines (Denizli, Turkey). The majority of the bacterial isolates obtained from these habitats belonged to the genera Sporosarcina, Brevundimonas, Sphingobacterium ...

2016
Miles Lubin Emre Yamangil Russell Bent Juan Pablo Vielma

We present a unifying framework for generating extended formulations for the polyhedral outer approximations used in algorithms for mixed-integer convex programming (MICP). Extended formulations lead to fewer iterations of outer approximation algorithms and generally faster solution times. First, we observe that all MICP instances from the MINLPLIB2 benchmark library are conic representable wit...

فرسایش بادی یکی از عوامل اصلی در تخریب خاک و محیط زیست و همچنین آلودگی هوا در مناطق خشک و نیمه خشک است. با توجه به هزینه­های زیاد استفاده از مالچ­های نفتی و همچنین اثرات مخرب محیط زیستی این نوع مالچ­ها، در تحقیق حاضر، اثر فرآیند ترسیب میکروبی کربنات کلسیم (MICP) به عنوان یک روش بیولوژیک سبز و سازگار با محیط زیست جهت کنترل فرسایش بادی و تثبیت شن­های روان مورد مطالعه قرار گرفته است. بدین منظور با...

Journal: :Applied biochemistry and biotechnology 2014
Chang-Ho Kang Jae-Ho Choi JunGu Noh Dae Young Kwak Sang-Hyun Han Jae-Seong So

Contamination by radioactive strontium ((90)Sr) is a significant environmental problem. Ureolytically driven calcium carbonate precipitation has been proposed for use in geotechnical engineering for soil remediation applications. In this study, 68 ureolytic bacterial strains were newly isolated from various environments. Of these, 19 strains were selected based on ureolytic activity shown when ...

Journal: :Acta Geotechnica 2022

Abstract A coupled bio-chemo-hydro-mechanical model (BCHM) is developed to investigate the permeability reduction and stiffness improvement in soil by microbially induced calcite precipitation (MICP). Specifically, our based on geometric method a link between micro- macroscopic features generated. This allows capture material property changes caused variations microstructure during MICP. The wa...

Journal: :The Analyst 2014
Michael Deicke Jan Frieder Mohr Jean-Philippe Bellenger Thomas Wichard

Metal isotope coded profiling (MICP) introduces a universal discovery platform for metal chelating natural products that act as metallophores, ion buffers or sequestering agents. The detection of cation and oxoanion complexing ligands is facilitated by the identification of unique isotopic signatures created by the application of isotopically pure metals.

Journal: :Sustainability 2023

Biomineralization processes utilizing microbial-induced carbonate precipitation (MICP) have recently shown promise as an effective approach for remediating heavy metal contamination. This article offers a comprehensive review of the latest research on MICP-mediated remediation, with focus characteristics metals in treated environment, such copper, cadmium, lead, nickel, zinc, chromium, and mixe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده عمران و محیط زیست 1394

امروزه به منظور بهبود مشخصات فیزیکی خاک از قبیل افزایش مقاومت خاک، نفوذپذیری و ... روشهای متفاوتی پیشنهاد و اجرا شده است. از سویی مسائلی همانند آلودگی محیط زیست و مسائل اقتصادی باعث شده که مهندسان در سدد ابداع روش های جدیدی برای بهتر کردن مشخصات مکانیکی خاک باشند. روش کشت باکتری به منظور بهبود خاک از جمله روش های نوینی است که در دهه اخیر مطرح گردیده و با توجه به مزیت های آن نسبت به سایر روش ها ...

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