Sedimentary System Evolution and Petroleum Geological Significance of the Quaternary Ledong Formation in Qiongdongnan Basin
Li Wenlong,
Mao Xueliang,
Song Peng,
Wu Bin,
Yang Zhenjian
Issue:
Volume 7, Issue 2, June 2023
Pages:
34-40
Received:
18 February 2023
Accepted:
6 May 2023
Published:
10 May 2023
Abstract: Quaternary Ledong formation in Qiongdongnan Basin is rich in hydrate, it is import to clarify the evolution and distribution rule of the sedimentary system of Ledong formation in this area. Based on 3D seismic data and drilling data, combined with the characteristics of regional sea level change, and guided by the principle of sequence stratigraphy, this paper established a high-precision sequence stratigraphic framework of Ledong Formation, identified five third-order sequences, and pointed out that the S14 interface was the conversion surface of progradational continental slope to accretive continental slope. The Ledong Formation was divided into the upper member of Ledong Formation and the lower member of Ledong Formation, which controls the development of submarine fans. The results show that the lower member of Ledong Formation has developed a large channelized submarine fan of the western provenance central canyon system, and the upper member of Ledong Formation has developed a small scale submarine fan, mass flow and sheet sand complex sedimentary body outside the northern provenance canyon system. The sedimentary type and temporal and spatial evolution characteristics are defined, which provides geological basis for the prediction of favorable reservoir distribution of hydrate and shallow gas in this area.
Abstract: Quaternary Ledong formation in Qiongdongnan Basin is rich in hydrate, it is import to clarify the evolution and distribution rule of the sedimentary system of Ledong formation in this area. Based on 3D seismic data and drilling data, combined with the characteristics of regional sea level change, and guided by the principle of sequence stratigraphy...
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Effect of Natural Coagulants on the Treatment of Municipal Wastewater
Md. Ashraful Islam,
S. M. Adnan Omi,
Md. Niamul Bari
Issue:
Volume 7, Issue 2, June 2023
Pages:
41-50
Received:
11 April 2023
Accepted:
2 May 2023
Published:
17 May 2023
Abstract: Nowadays, the study of the natural coagulants to treat wastewater has become a growing interest to the environmental researchers around the world as its numerous advantages over chemical coagulants. In this study, the effect of banana peel powder and banana stem powder as natural coagulant on the treatment of municipal wastewater was investigated. Wastewater samples were collected from two different primary drains located near Padma garden and Bornali within Rajshahi city corporation area. The collected wastewater samples were characterized based on turbidity, pH, conductivity, TDS, TSS, TS, alkalinity, acidity and organic content and also compared with maximum permissible limits before going treatment. The worst wastewater sample was treated with varying coagulant doses, contact time, speed and pH. The effectiveness of natural coagulants was evaluated based on the percentage removal of turbidity, alkalinity and acidity. The highest removal of turbidity, alkalinity and acidity were obtained 93.5%, 67.3% and 65.5% by banana peel powder and 93.4%, 71% and 72% by banana stem powder respectively. Therefore, the result revealed that both banana peel powder and banana stem powder had capability to treat municipal wastewater as natural coagulant. Higher treatment conditions were not economically feasible because it did not significantly remove the pollutants. The removal of alkalinity and acidity indicated that it was a partial coagulation and partial adsorption process in which both materials also had high adsorption capacities.
Abstract: Nowadays, the study of the natural coagulants to treat wastewater has become a growing interest to the environmental researchers around the world as its numerous advantages over chemical coagulants. In this study, the effect of banana peel powder and banana stem powder as natural coagulant on the treatment of municipal wastewater was investigated. ...
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Analysis of Community Behavior Maintaining the Settlement Environment in the River Flow Area (Das) Mamasa Upstream Section
Rahmansah,
Muhammad Ardi,
Mithen Lullulangi
Issue:
Volume 7, Issue 2, June 2023
Pages:
51-55
Received:
29 April 2023
Accepted:
22 May 2023
Published:
31 May 2023
Abstract: This research aims to: (1) to know the behavior of the community in maintaining the residential environment in the upstream Mamasa watershed (DAS), (2) to determine ecosystem knowledge, environmental knowledge, motivation, and attitudes towards the community's environment in the upstream Mamasa watershed, (3) to determine the effect of ecosystem knowledge, environmental knowledge, motivation, and attitudes towards the environment individually and collectively on the behavior of the community in maintaining the residential environment in the upstream Mamasa watershed. This type of research is quantitative correlational. The research location is in the upstream Mamasa watershed. Research population is the community (head of family) who live in the upstream Mamasa watershed. Respondents as many as 50 heads of families were selected using the Systematic Random Sampling method. The research variables consist of: (1) independent variable (X), and (2) dependent variable (Y). The dependent variable is the behavior of the community in protecting the residential environment in the upstream Mamasa watershed (Y). The independent variable (X) consists of: (a) ecosystem knowledge (X1); (b) environmental knowledge, (X2); (c) motivation to maintain the housing environment (X3), and (d) attitude towards the housing environment (X4). Data analysis techniques used: (1) descriptive statistical analysis, to describe the average, maximum, minimum, standard deviation, frequency distribution, and histogram values of each variable, and (2) inferential statistical analysis is used to test the hypothesis. The analysis model used is simple regression analysis and multiple regression. The results showed that: (1) Behavior of the community to care for the environment in the upstream Mamasa watershed was low, (2) knowledge of ecosystems, environmental knowledge, motivation, and attitudes towards the community's environment in the upstream Mamasa watershed was low, (3) knowledge ecosystems, environmental knowledge, motivation, and attitudes towards the environment individually and jointly influence the behavior of the community to maintain the residential environment in the upstream Mamasa watershed.
Abstract: This research aims to: (1) to know the behavior of the community in maintaining the residential environment in the upstream Mamasa watershed (DAS), (2) to determine ecosystem knowledge, environmental knowledge, motivation, and attitudes towards the community's environment in the upstream Mamasa watershed, (3) to determine the effect of ecosystem kn...
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