6^th Global Summit and Expo on Pollution Control May 06-07, 2019 | Holiday Inn Amsterdam – Arena Towers | Amsterdam, Netherlands

Mohammed B Alshammari is an Assistant Professor in Organic Chemistry at the Department of Chemistry College of Science & Humanities in the Prince Sattam Bin Abdulaziz University.He obtained both his bachelor and master’s degree in Chemistry from the King Saud University.He have done his PhD in Orgranic Chemistry from the Cardiff University. He is a member of the Member of Saudi Chemical Society.

Isomerically purechlorinated phenols are valuable materials as intermediates for industrial and pharmaceutical chemicals.They are also the primary active ingredients in a range of household and commercial disinfectants. But concerns have increased about the toxic nature and environmental accumulation of some chlorinated phenolic compounds and their potential by-products.Therefore, it is important to develop chlorination catalysts capable of minimizing undesirable waste products.We have previously investigated the use of simple organic sulfi des for the catalytic chlorination reaction of phenols using sulfuryl chloride.Unfortunately, volatile examples of such materials are undesirable on an industrial scale because of their odors.The problem of the volatility of such sulfides was mitigated by the use of substituted Merrifi eld resins and dithiaalkanes, but neither of these reagent types is likely to be useful commercially. Now we report that, two cyclic and two polymeric disulfi des have been synthesized and established to be useful catalysts for the chlorination of m-xylenol, o-cresol, m-cresol and phenol using freshly distilled sulfuryl chloride in the presence of aluminum or ferric chloride as a co-catalyst at room temperature.The yields of para-isomers and para/ortho ratios were higher compared to cases where no catalyst was used with most catalysts for most phenols even when a very low concentration of disulfide was used.

Abie Cythia Besem, after completing High School studied Journalism at the University of Buea, Cameroon and graduated with a BSc in Journalism and Mass Communication. Due to the  harmful environmental activities in most areas in Cameroon, she engaged into improving theenvironment, and attending seminars based on environmental protection while also focusing on her Post-graduate programs at the University of Buea, Cameroon. She has also worked as an Educator with World Wide Fund for Nature in Cameroon, educating school children and the local population on the importance of conserving the natural environment and biodiversity for a better world. She also carried out community radio talks based on environmental conservation with the goal of educating the local people on the risk of harmful environmental activities.

Fathy Hassan has obtained his Doctor of Science degree from Graduate School of Science and Engineering, Saitama University, Japan, in March 2018. He previously worked as a Junior Research Associate at Emergent Bioengineering Materials Research Team, RIKEN CEMS, Japan. Currently, he is working as an Assistant Professor of Physical Chemistry at Chemistry Department, Faculty of Science, Tanta University, Egypt. His research interest is development of advanced functional materials for photonic and electronic applications.

 

Light-driven atropisomeric polymers containing azobenzene moiety as a photorsponsive segment and binaphthyl as an axially chiral segment were designed and synthesized. The polymers were obtained by radical polymerization, and the number-average molecular weight and polydispersity were around 7,000 and 2.0, respectively. The chiral polymer exhibited the glass transition temperature over 75^oC with good thermal stability above 280^oC. Solution-processed amorphous fi lms could be obtained by spin coating or drop castingtechnique. The fi lms show good uniformity without grain boundary, which areadvantageous for fabrication of the thin-fi lm devices. The chiral polymers in the film showed trans-cis photoisomerization upon irradiation at 365 nm for 180 s.The ratio of the trans:cis isomers in the photostationary state were determine to be 60:40. After photo-irradiation of visible light at 436 nm, cis-trans back-isomerization occurred clearly. Cis-trans thermal back isomerization also tookplace at 25^oC with a half-life of 13 hours. Photoisomerization of the chiral polymer gave rise to photo-induced change in optical rotation. Photochemical modulation of the optical rotation reached to 700^oC, and these values were switched by alternating irradiation between 365 nm and 436 nm. Interestingly, the polymers show fl uorescence properties, which is a unique behavior compare to simple azobenzene polymers. Normally, azobenzene compounds are non-fl uorescent because of the nonradiative relaxation process of the azobenzene group caused by the highly effi cient trans-cis isomerization. In terms of molecular design, binaphthyl moiety act as fluorescent segment leading to the overall molecule become has fl uorescent. Further, a photoswitchable fl uorescence behavior was obtained; an increase in the fluorescence intensity after irradiation at 365 nm and recovery to the initial state after irradiation at 436 nm. Additionally, photo-control of molecular orientation of the polymer was explored in the fi lm. After photoirradiation of linearly polarized light at 532 nm, change in refractive indexwas observed owing to anisotropic molecular orientation. Maximum change ina value of birefringence after irradiation was 6 x 10-3. These results suggested the chiral polymers are expected to be photoresponsive chiroptical materials for light-driven molecular devices.

Irum Zahara has completed her Bachelor’s (2005-2009) and Master’s (2010-2012) in Environmental Sciences from University of the Punjab, Lahore,Pakistan. She has fi nished her second Master’s from TU Bergakademie Freiberg, Germany (2015-2017). During the Master’s degree, she has conducted her research in groundwater remediation at Aarhus University, Denmark, with the project title as “Ciliates Grazing affects the Microbial Degradation of Vinyl Chloride in Groundwaters”. She is pursuing her PhD studies in Renewable Resources at University of Alberta, Canada.

Water and energy infrastructures are interdependent, as energy is required for water extraction, desalination, treatment and transportation. The energy industry also required water such as water is needed for resource exploitation (fossil fuels), energy conversion processes (refi ning), power production and transportation. Today, washing and cooling has now become the dominant processes for many of the substantial industries. These industries have in-return affected the quality of water and the aquatic ecosystems that depend on clean water. With continuously growing population and increasing demand for energy consumption is leading to water contamination and its proper treatment has now become a global issue of concern. The water used for energy production becomes contaminated through a variety of ways and carries wide range of contaminants such as inorganics (heavy metals), organics and other water soluble/miscible by-and co-products. Cost effective, sustainable and scalable treatment methods with high removal effi ciency for the removal of multiple contaminants are highly desirable. Recently, we have developed a sorption technology which uses modifi ed/engineered keratin biopolymers from poultry feathers to remove heavy metals. Besides many other natural materials, keratins proteins provide an excellent role to be used as bio-sorbents or fi ltration systems to remove toxic contaminants because of their functional groups and side chains as backbone structures. The developed sorbents were tested at lab scale for the removal of nine trace metals. The results are highly promising with very high sorption affi nity ≤80% removal of metals. We are currently testing to expand applicability of these bio-sorbents for a wide range of contaminants. The overall aim is to develop an alternative, low cost and environment friendly sorption technology that is both effective as well as economically viable for industrial scale wastewater treatment to simultaneously remove multiple contaminants produced by energy generation processes.

Mojtaba Taseidifar is an Iranian PhD student attending the University of New SouthWales,Canberra,Australia with a thesis entitled ‘‘Novel Water Technologies” in the research group of Professor Richard M Pashley. His research area generally involves re-using wastewater, cavitation prevention and seawater desalination, which all are of paramount importance to tackle the problems associated with water pollution and shortage. He is very interested to meet with experts/ researchers in related areas to find out about their work in order to build up future collaborations.

We have developed a novel synthesis method for the efficient production of a useful, biodegradable surfactant obtained using a novel and efficient chemical reaction between cysteine (a thiol-based amino acid) and an octanoyl compound. The synthesized surfactant is effective over a wide pH range and can be decomposed in natural products. The surfactant has a high affinity to remove various heavy metal ions including Hg (II), Pb (II), As (III), Cd (II) and Cr (VI) in drinking water and so these ions can be removed using a typical ion flotation process. Other ions like strontium (Sr) and lanthanum (La) also can be removed in aqueous solutions using this surfactant in a continuous air-bubbling flow. The compound might also be useful for the release of pre fluorinated alkylated substances (PFAS) present as contaminants in soil and ground waters, as these compounds mostly bind on active components on the soil via bridging multi-valent cations, which the surfactant has a high ability to encapsulate. The action of this chelating surfactant to help with the release of PFAS compounds could be facilitated using a fluidized bed, via air bubbling, which could form the basis for an efficient foam fractionation process to remove PFAS contaminants. The synthesized surfactant was also characterized with elemental analysis, mass spectroscopy, FT-IR, melting point (MP) and critical micelle concentration (CMC) fractionation.

Ali Dehshahri has completed his PhD at Mashhad University of Medical Sciences, Iran. He is working as an Associate Professor at Shiraz University of Medical Sciences, since 2010. He has published more than 30 papers in reputed journals (H-Index=13) and has been serving as the Head of the Department of Pharmaceutical Biotechnology at Shiraz University of Medical Sciences, Iran.

In this investigation, a galactosylated derivative of polyethylenimine(PEI) was prepared based on the attachment of two PEI molecules to separate the delivery and targeting motifs. Galactosylated low molecular weight PEI (LMW PEI) was coupled to a high molecular weight PEI (HMW PEI) through a succinic acid linker in order to restore the amine content of the whole conjugate used for ligand conjugation. The PEI conjugate showed substantial plasmid DNA condensation ability and buffering capacity. The size of PEI based nanoparticles was around 75 nm. The level of transgene expression increased by up to four folds in the cell line over-expressing asialoglycoprotein receptors (ASGPR). The results demonstrated that the separation of delivery and targeting motifs could be considered as a route to restore the amine content of the PEI molecule utilized for targeting ligand conjugation.