What is the best pH conditions to use different coagulant from FeCl3.6H2O, Al2SO4.18H2O, Fe2SO3 and AlCl3 for wastewater treatment?

What is the best pH conditions to use different coagulant FeCl3.6H2O, Al2SO4.18H2O, Fe2SO3 and AlCl3 for wastewater treatment?

31 December 2017 5,849 2 View

What are the disadvantages of using nanotechnology in water and wastewater treatment?

In my study I found different disadvantages of using nanoparticles in water and wastewater treatment such solubility, increasing TOC and difficulty of collecting after treatment I need your...

31 December 2017 1,389 30 View

Can anybody help for How to select nano particles to introduce into polymer membrane for desalination applications?

Can anybody help for How to select nano particles to introduce into polymer membrane for desalination applications?

31 December 2017 3,258 4 View

Why the particle size for nanomaterials preparation different from chloride salts and sulfate salts? what is the best reducing agent except NaBH4?

The preparation of nano metal especially nano aluminium have different size according to the aluminium salt (Chloride and Sulfate), why? and Generally what is the most suitable reducing agent that...

31 December 2017 5,102 10 View

Preparation of iron using NaBH4 produce nano iron increase pH of solution and by using green synthesis produce nano iron decrease pH of solution Why?

Preparation of iron using drop by drop method of reducing agent such as NaBH4 produce nano iron with zero charge increase pH to be alkaline and by using green synthesis as reducing agent produce...

31 December 2017 2,811 2 View

How can I convert the flowrate ml/min into pressure psi?

I am using hose not water pipe and i want to convert the flow rate ml/min into pressure psi in simple equation

31 December 2017 7,066 3 View

How can i manage the effect of operating parameters (pH, Dose, Stirring rate, Concentration and Temperature effects) all of them at the same time?

i want to study the effect of dose against different stirring rate and different time in the same experiment what can i do?

31 December 2017 2,366 4 View

Can anybody help for How to select nano particles to introduce into polymer membrane for desalination applications?

Can anybody help for How to select nano particles to introduce into polymer membrane?

11 December 2017 9,902 0 View

What is the mechanisms of salt rejection using entrapped nano particles into membrane?

I want to know the roles t to prepare and identify nano particles in desalination applications

11 December 2017 403 0 View

What is the mechanisms of salt rejection using entrapped nano particles into membrane?

What is the mechanisms of salt rejection using entrapped nano particles into membrane?

11 December 2017 8,372 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View