基礎講座 電気泳動(Electrophoresis)

A review on the utilization of fly ash

Equilibrium, kinetics, mechanism, and process design for the sorption of methylene blue onto rice husk

Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions - a review.

Heavy metal remediation of aqueous streams is of special concern due to recalcitrant and persistency of heavy metals in environment. Conventional treatment technologies for the removal of these toxic heavy metals are not economical and further generate huge quantity of toxic chemical sludge. Biosorption is emerging as a potential alternative to the existing conventional technologies for the removal and/or recovery of metal ions from aqueous solutions. The major advantages of biosorption over conventional treatment methods include: low cost, high efficiency, minimization of chemical or biological sludge, regeneration of biosorbents and possibility of metal recovery. Cellulosic agricultural waste materials are an abundant source for significant metal biosorption. The functional groups present in agricultural waste biomass viz. acetamido, alcoholic, carbonyl, phenolic, amido, amino, sulphydryl groups etc. have affinity for heavy metal ions to form metal complexes or chelates. The mechanism of biosorption process includes chemisorption, complexation, adsorption on surface, diffusion through pores and ion exchange etc. The purpose of this review article is to provide the scattered available information on various aspects of utilization of the agricultural waste materials for heavy metal removal. Agricultural waste material being highly efficient, low cost and renewable source of biomass can be exploited for heavy metal remediation. Further these biosorbents can be modified for better efficiency and multiple reuses to enhance their applicability at industrial scale.

Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions

Utilisation of bagasse fly ash (a sugar industry waste) for the removal of copper and zinc from wastewater

Removal of DDD and DDE from wastewater using bagasse fly ash, a sugar industry waste

Summary Among various diseases, cancer has become a big threat to human beings globally. As per Indian population census data, the rate of mortality due to cancer in India was high and alarming with about 806000 existing cases by the end of the last century. Cancer is the second most common disease in India responsible for maximum mortality with about 0.3 million deaths per year. This is owing to the poor availability of prevention, diagnosis and treatment of the disease. All types of cancers have been reported in Indian population including the cancers of skin, lungs, breast, rectum, stomach, prostate, liver, cervix, esophagus, bladder, blood, mouth etc. The causes of such high incidence rates of these cancers may be both internal (genetic, mutations, hormonal, poor immune conditions) and external or environmental factors (food habits, industrialization, over growth of population, social etc.). In view of these facts, the present article describes the status of various types of cancers in India and its comparison at global level. Besides, attempts have been made to describe the main causes of cancer along with their preventive measures. In addition to this, efforts have also been made to predict the effect of increasing number of cancer patients on the Indian economy.

Cancer Scenario in India with Future Perspectives

Speciation of arsenic and chromium metal ions by reversed phase high performance liquid chromatography.

Metal ions are essential for human beings at low concentrations but they are toxic or even carcinogenic at high concentrations. Many metallic ions are found in the environment in different species which are differentiated not only by their physicochemical forms but also by their diverse toxicities with respect to living organisms (speciation). CE has been used for metal ion speciation. The present review article describes the recent trends in metal ion speciation by CE. This article deals with the speciation of metal ions, optimization of the speciation (by independent and dependent variables), hyphenation of CE, validation of the methods, mechanisms of speciation, CE versus chromatography and conclusions.

Imran Ali

Papers

Utilisation of bagasse fly ash (a sugar industry waste) for the removal of copper and zinc from wastewater

Removal of DDD and DDE from wastewater using bagasse fly ash, a sugar industry waste

Cancer Scenario in India with Future Perspectives

Speciation of arsenic and chromium metal ions by reversed phase high performance liquid chromatography.

Metal ion speciation and capillary electrophoresis: Application in the new millennium