Thickness of calcium carbonate coats on stones of the Heishanxia terraces of the Yellow River and dating of coarse clastic sedimentary geomorphic surfaces

2002 ◽  
Vol 47 (19) ◽  
pp. 1594
Author(s):  
Chengqi XING
Keyword(s):  
Calcium Carbonate ◽  
Yellow River ◽  
The Yellow River ◽  
Clastic Sedimentary ◽  
Geomorphic Surfaces

Thickness of calcium carbonate coats on stones of the Heishanxia terraces of the Yellow River and dating of coarse clastic sedimentary geomorphic surfaces

2002 ◽  
Vol 47 (19) ◽  
pp. 1594-1600 ◽  
Author(s):  
Chengqi Xing ◽  
Gongming Yin ◽  
Guoyu Ding ◽  
Yanchou Lu ◽  
Xuhui Shen ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Yellow River ◽  
The Yellow River ◽  
Clastic Sedimentary ◽  
Geomorphic Surfaces

THE EFFECT OF CALCIUM CARBONATE ON SEDIMENT AGGREGATION IN THE INTERTIDAL ZONE OF THE YELLOW RIVER ESTUARY

2010 ◽  
Vol 30 (4) ◽  
pp. 87-94
Author(s):  
Youyuan CHEN ◽  
Junpeng WANG ◽  
Wenjuan ZHAO ◽  
Leijian GAO ◽  
Tao HUANG ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Intertidal Zone ◽  
Yellow River ◽  
River Estuary ◽  
Yellow River Estuary ◽  
The Yellow River ◽  
Sediment Aggregation

scholarly journals Experimental Study of EICP Combined with Organic Materials for Silt Improvement in the Yellow River Flood Area

2020 ◽  
Vol 10 (21) ◽  
pp. 7678
Author(s):  
Hua Yuan ◽  
Guanzhou Ren ◽  
Kang Liu ◽  
Wei Zheng ◽  
Zhiliang Zhao
Keyword(s):  
Calcium Carbonate ◽  
Organic Materials ◽  
Yellow River ◽  
Optimum Concentration ◽  
The Yellow River ◽  
Brown Sugar ◽  
Nucleation Sites ◽  
Carbonate Deposition ◽  
River Flood ◽  
Calcium Carbonate Deposition

Enzyme-induced carbonate precipitation (EICP) is an emerging biogeotechnical technique that uses free urease to improve soil. Despite its advantages of eliminating complex microbial cultures and reducing reaction byproducts, its efficiency is considered lower than that of microbial induced calcite precipitation (MICP) due to the lack of nucleation sites that induce calcium carbonate deposition. To enhance the strengthening efficiency of EICP for fine-grained soils, an improved EICP method that involves adding an appropriate mass concentration of organic materials (skim milk powder, glutinous rice powder, and brown sugar) into urease solution was proposed and applied to reinforce silt in the Yellow River flood area of China. The preferred concentration and ratio of cementation solution and the optimum concentration of each of the organic materials were determined. Then, the reinforcement effect of the improved EICP at the optimum concentration was compared with the control group, and the reinforcement mechanism for this method was discussed. The results show that after the organic material inclusions, soil strength can be enhanced by 33% compared with EICP-treated soil and is nearly four times higher than that of untreated soil. The superiority of this method over traditional EICP and MICP mainly stems from its ability to provide templates and nucleation sites for calcium carbonate deposition and to improve the size, morphology, and structure of calcium carbonate crystals.

GEOMORPHOLOGICAL CHARACTERISTICS OF A TRANSECT FROM THE YELLOW RIVER TO THE IRON PAGODA IN KAIFENG CITY, CHINA

2018 ◽  
Vol 14 (1) ◽  
pp. 245-254 ◽  
Author(s):  
Yang LI ◽  
◽  
Zhixiang XIE ◽  
Fen QIN ◽  
Yaochen QIN ◽  
...  
Keyword(s):  
Yellow River ◽  
The Yellow River ◽  
Kaifeng City
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