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Articles

by Xu DENG
46 Views, 0 PDF Downloads

I Recent "bioremediation of heavy metal pollution with different kinds of marine biomass including mar INE algae, bacteria and plants was reviewed. Operational factors and mechanisms of bioremediation process were further and analyzed. Moreover, the authors stated that further study should focus on the screening of marine bacteria with high accumulation CA Pacity of heavy metals, the effect of environmental factors on bioremediation process and the mechanism of bioaccumulation of heavy metals by marine organisms.

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Articles

by Yu Cao
57 Views, 0 PDF Downloads

Bohai Sea area is one of the center of Economic Development in North China , The rapid socio-economic development of the

Terrestrial pollutant mass into the sea , Marine Pollution accidents occur frequently , ecosystem destroyed, etc. , causes the Bohai environment great pressure . article starting from the main problems of marine environmental pollution in Bohai Sea , Analyzing pollution control measures and their effects , mention Some thoughts on marine environmental protection in Bohai Sea .

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Articles

by Ocean Yu
40 Views, 0 PDF Downloads
in the context of public goods relativity , This study faces the current marine environmental protection of our country from two levels of the nature and the nature of the situation Domain Vertical Responsibility system profiling , on the level of the compliance , Research considers that the current main administrative departments of marine environment in China homogeneous vertical responsibility system dominates , This system is inconsistent with the efficiency principle of the supply of public goods , in the real sex level , Research finds local government activism prevalent in ocean development , and the isomorphic responsibility system makes it difficult to Get efficient , aggravated the inefficient Supply of public goods .
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Articles

by Qiaoru Wang
59 Views, 0 PDF Downloads

Amino acid is an important biogenic organic matter in the ocean, which plays a very important role in the biogeochemical cycle of organic carbon and organic nitrogen.  Amino acids, as active components in marine organisms, are selectively removed by heterotrophic bacteria in the process of organic matter degradation, and are sensitive indicators to indicate the degree of organic matter degradation in the ocean. This paper first introduces the classification of amino acids in seawater, and summarizes the sources and biological activities of dissolved free amino acids (DFAA ), dissolved binding amino acids (DCAA ), granular amino acids (PAA ), and bacterial markers (D- amino acids ).

At the same time, the change of amino acids in the process of organic matter degradation can be attributed to selective preservation, three mechanisms of producing or enriching bacterial source substances and bacterial transformation. Finally, this paper summarizes the 6 degradation factors based on amino acids: the contribution rate of dissolved amino acids (THAA ) to organic carbon or organic nitrogen (THAA-C% or THAA-N% ), degradation factors (degradation index), activity factors (reactivity index ), and individual amino acids D/ L ratio, aspartic acid / beta - alanine or glutamic acid / gamma - amino butyric acid ratio (ASP/beta,-ala or Glu/gamma,-ABA ) and contribution rate of bacteria-derived organic matter, their respective characteristics, applicable degradation stage and specific application.

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Articles

by Hongyu Li
43 Views, 0 PDF Downloads

With the development of marine oil pollution control technology, bioremediation technology has attracted much attention because of its low cost, high efficiency and environmental friendly characteristics, while solid bacteria technology can improve the degradation efficiency of bioremediation petroleum hydrocarbon degrading bacteria . In this study, sodium alginate and CaCl2 are used to carry out a fixed ball-forming test on petroleum hydrocarbon degrading bacteria, and four factors and three levels of orthogonal test are used to optimize the condition parameters (such as, sodium alginate concentration, bacteria suspension addition amount, CaCl 2 concentration and crosslinking time). The results show that the degradation efficiency of petroleum hydrocarbon degrading bacteria can be effectively improved by adopting a solid bacteria method. When the concentration of sodium alginate is 3%, the addition amount of bacteria suspension is 75%, CaCl 2 concentration 3% ,the cross-linking time is 30h to achieve the optimal immobilization effect, and the absolute degradation rate of petroleum hydrocarbon degrading bacteria microsphere 7d is 48. " 7% is 28%。 "higher than directly adding bacteria agent.

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