- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
- [email protected]
This study evaluated the efficacy of enzyme induced calcite precipitation (EICP) in restricting the mobility of heavy metals in soils. EICP is an environmentally friendly method that has wide ranging applications in the sustainable development of civil infrastructure. The study examined the desorption of three heavy metals from treated …
اقرأ المزيد
Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully to produce solid materials, it is important to understand the formation process of the material in detail. It is well known that …
اقرأ المزيد
Downloadable! This study evaluated the efficacy of enzyme induced calcite precipitation (EICP) in restricting the mobility of heavy metals in soils. EICP is an environmentally friendly method that has wide ranging applications in the sustainable development of civil infrastructure. The study examined the desorption of three heavy metals from treated …
اقرأ المزيد
The in vitro calcium carbonate precipitation tests showed that bacterial cell walls, rather than dead cells, accelerated the carbonation of calcium ions in calcium hydroxide solution. Calcium carbonate filled the microvoids in concrete, thus optimizing the MICP process. Thus, the bacterial cell wall was a promising additive in improving ...
اقرأ المزيد
We are a family business that researches, develops and manufactures premium calcium carbonate to clients all across the South Asia, Middle East and Africa. The Emirates Mineral (India) LLP is one of the most reliable and trusted names in producing high quality calcium carbonate in India.
اقرأ المزيد
Microbially induced calcium carbonate precipitation is a natural and widespread phenomenon that has been a green and efficient approach for environmental issues. However, long-term field experiments are lacking and microbially induced calcium carbonate precipitation biological routes for desert restoration is unclear.
اقرأ المزيد
The most basic requirement for the precipitation of calcium carbonate (CaCO 3) minerals, calcite, and aragonite is that the product of the concentrations of calcium [Ca 2+] and carbonate ions [CO 3 2−] exceeds the solubility product of calcite (Equation 1) and aragonite, respectively.
اقرأ المزيد
In order for carbonate mineral precipitation to occur, calcium ions are supplied from overlying seawater, while the concentration of bicarbonate ions is determined by the concentration of total dissolved inorganic carbon and the in situ pH (Zeebe and Wolf-Gladrow, 2001).The saturation state (Ω) of the pore fluid informs the likelihood of …
اقرأ المزيد
Biomineralization is a naturally occurring process in living organisms. In this review, we discuss microbially induced calcium carbonate precipitation (MICP) in detail. In the MICP process, urease plays a major role in urea hydrolysis by a wide variety of microorganisms capable of producing high levels of urease. We also elaborate on the …
اقرأ المزيد
Wind-induced sand erosion is a natural process, and can have several negative impacts on human health, environment, and economy. To mitigate the wind-induced sand erosion, an environmental friendly technique that helps to bind soil particles is desirable. The microbially induced calcium carbonate precipitation (MICP) treatment …
اقرأ المزيد
The current high global demand for high-quality paper, paint, adhesive/sealant, and plastic, filler industries cannot survive without unique and high-quality precipitated calcium carbonate (PCC). They are used as fillers, additives, and reinforcements. PCC is a key constituent of the modern paper and plastic industry. This …
اقرأ المزيد
What links sea urchins, limestone and climate change? The common thread is calcium carbonate, one of the most widespread minerals on Earth. UC Davis researchers have now measured the energy changes among different forms of calcium carbonate, from its messy noncrystalline forms to beautiful calcite crystals that could …
اقرأ المزيد
This review hinges on the synthesis of calcium carbonate particles (aragonite, calcite and vaterite phases) using methodologies such as: gaseous diffusion and reactants mixing. The synthesis of the particles involves some variables which play a decisive role in the formation of calcium carbonate particles.
اقرأ المزيد
MICP occurs as a by-product of bacterial metabolism, which creates a microenvironment that favours the precipitation of calcium cations and carbonate anions in the form of mineral calcium carbonate, predominantly calcite. This process is dependent on changes in pH, ion concentrations and availability of cell surface nucleation sites .
اقرأ المزيد
Addition of guar gum also accelerated the rate and enhanced the amount of calcium carbonate precipitation. Moreover, the precipitate consisted of a higher amount of calcite—known to be the most stable form of calcium carbonate . Polymer degradation releases free sugar which could be readily available in the growth medium for bacterial …
اقرأ المزيد
A collection of Javascript utilities to be incorporated into scientific courseware. Precipitation and Solution of Calcium Carbonate. The behavior of calcium carbonate (for example, the mineral calcite) in a near-surface environment is controlled primarly by equilibrium in …
اقرأ المزيد
