microbial leaching
11Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …
12Eutrophication — The eutrophication of the Potomac River is evident from its bright green water, caused by a dense bloom of cyanobacteria. Eutrophication (Greek: eutrophia healthy, adequate nutrition, development; German: Eutrophie) or more precisely… …
13Corrosion — v · d · e Materials failure modes Buckling · …
14Human impacts on the nitrogen cycle — Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation (Galloway 2003). As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over… …
15Chemistry of biofilm prevention — Biofilm formation occurs when free floating microorganisms attach themselves to a surface. They secrete extracellular polymers that provide a structural matrix and facilitate adhesion. Because biofilms protect the bacteria, they are often more… …
16Microbiology of decomposition — Decomposing pig showing signs of bloat and discoloration, a result of microbial proliferation within the body. Microbiology of decomposition is the study of all microorganisms (mainly bacteria and fungi) involved in the chemical and physical… …
17Terra preta — (“dark soil” in Portuguese) refers to expanses of very dark, fertile anthropogenic soils found in the Amazon Basin. It owes its name to its very high charcoal content. It is also known as “Amazonian dark earth” or “Indian black earth”. In… …
18Decomposition — For other uses, see Decomposition (disambiguation). A mummified rat. Stages of death Pallor mortis Algor mortis …
19Hyperaccumulateur — Un hyperaccumulateur, ou plante hyperaccumulatrice, est une plante capable de stocker dans ses tissus une quantité élevée, voire très élevée, d un ou de plusieurs éléments. Les hyperaccumulateurs sont utilisés lors d opérations de… …
20Hyperaccumulateurs — Hyperaccumulateur Un hyperaccumulateur, ou plante hyperaccumulatrice, est une plante capable de stocker dans ses tissus une certaine concentration dépendant du métal : plus de 1 000 mg/g de matière sèche dans les feuilles pour le nickel,… …
