Complexing agents are extensively applied in many fields of industry. They are used to provide effective controlling trace metal ions in cleaning industries, textile, pulp and paper production, water treatment, agriculture, food industries, etc. Recently, the low biodegradability of these ligands and their accumulation in the environment has become a cause for concern. Therefore, replacement of...

Many non-conventional adsorbent have been studied as economic alternative to commercial activated carbon and mostly agricultural waste have been introduced such as rubber leaf powder and hazelnut shell. Microwave Incinerated Rice Husk Ash (MIRHA), produced from the rice husk is one of the low-cost materials that were used as adsorbent of heavy metal. The aim of this research was to study the fe...

As a selective stress, heavy metals play an important role in inducing the adaptive adjustments of insects to changing environments. Carboxylesterase (CarE) is one kind of biomarker that could help us to explore the adaptation mechanism of aphids to heavy metal stress. In this study, CarE activity and gene expression level were investigated in English grain aphids, Sitobion avenae (F.) (Hemipte...

Hyperaccumulators tolerate and accumulate extraordinarily high concentrations of heavy metals. Content of the metal chelator nicotianamine (NA) in the root of zinc hyperaccumulator Arabidopsis halleri is elevated compared with nonhyperaccumulators, a trait that is considered to be one of the markers of a hyperaccumulator. Using metabolite-profiling analysis of root secretions, we found that exc...

This paper deals with the removal of Cu(2+) from water using adsorbent materials prepared from paper industry waste materials (one de-inking paper sludge and other sludge from virgin pulp mill). Experimental results showed that de-inking paper sludge leads to mesoporous materials (V(mic)/V(T)=0.13 and 0.14), whereas the sludge from virgin pulp mill produces high microporous adsorbents (V(mic)/V...

Alumina is one of the most widely used adsorbent for removal of dissolved pollutants from waste water. Various chemical species, especially ions, are known to be adsorbed onto alumina. On the other hand, alumina is a typical support for catalysts. Many kinds of metal supported catalysts are prepared using alumina as their support. These two roles of alumina, i.e., as adsorbent and support, are ...

The literature on inhibitors of hyaluronidase is both voluminous and contradictory. The contradictions are caused by the differences in methods used, by the differences in enzyme purity, and to a very high degree by the differences in the purity of the substrates used. The latter are often contaminated with protein, with glycogen, and with mucopolysaccharides other than hyaluronic acid, especia...

The bioavailable contents of heavy metals in karstic soils are a subject increasing concern since the uptake by plants can pose severe threat to food safety and public health. However, their effective factors poorly understood karst regions. Calcareous soil red developed from carbonate clastic rocks, respectively, were chosen typical region (Guilin) southwestern China, total (CT) available (CA)...

Abstract Birnessite-like minerals are among the most common Mn oxides in surficial soils and sediments, they mediate important environmental processes (e.g., biogeochemical cycles, heavy metal confinement) have novel technological applications water oxidation catalysis). Ca is dominant interlayer cation both biotic abiotic birnessites, especially when form association with carbonates. The curre...