Long Ba Le
@iuh.edu.vn
Institute of Environmental Science, Engineering and Management
Industrial University of Ho Chi Minh City
Scopus Publications
Scopus Publications
Binh Thanh Nguyen, Hao Phu Dong, Long Ba Le, and Nam Van Thai
Springer Science and Business Media LLC
Ahmad Hammad Khaliq, Muhammad Basharat, Malik Talha Riaz, Muhammad Tayyib Riaz, Saad Wani, Nadhir Al-Ansari, Long Ba Le, and Nguyen Thi Thuy Linh
Elsevier BV
Nguyen Khanh Hoang, Nguyen Van Phuong, and Le Ba Long
Universitas Sebelas Maret
<p>The acidification of agricultural soils should be avoided, and low pH soils should be corrected for better productivity. Soil improvement by applying biochar from agricultural byproducts combined with bentonite, a rich source in Vietnam, is a trend in green agriculture in the country. The current study is important in assessing the potential influences of biochar and bentonite on the pH and pH buffering capacity (pHBC) of low pH soil collected in Cu Chi, Ho Chi Minh City, Vietnam. Experimental methods, including biochar preparation (pyrolysis at 300°C, retention time: 2 h), soil incubation (time: 30 days, temperature: 27°C), and pH and pHBC determination, were performed. Research results have shown that biochar and bentonite have contributed to improving the pH and pHBC of gray soil samples. Using 1% bentonite and 1% biochar raised the pH to 6.21 and improved the pHBC of Cu Chi gray soil to 24.1 mmolH<sup>+</sup>/OH<sup>-</sup> kg<sup>-1</sup>. This dose is currently suitable for agricultural production in Vietnam. The study confirmed the applicability of biochar derived from cow manure prepared at a low pyrolysis temperature in combination with bentonite to improve soil parameters such as pH and pHBC in Cu Chi gray soil.</p>
Binh Thanh Nguyen, Gai Dai Dinh, Hao Phu Dong, and Long Ba Le
Elsevier BV
Cuong Quoc Nguyen, Anh Minh Tu Nguyen, and Long Ba Le
Informa UK Limited
Binh Thanh Nguyen, Long Ba Le, Anh Hung Le, and Nam Van Thai
Springer Science and Business Media LLC
Although inland surface water bodies have been studied intensively, few studies have looked at the interactive effects of seawater intrusion and waterway types on the water quality. The current study aimed to (1) assess the inland water quality as affected by waterway types and seawater intrusion-affected zones, (2) examine the longitudinal dynamics of the water quality, and (3) quantify the contributive percentage of pollution sources in the coastal Tien Giang Province, Vietnam. A total of 680 surface-water samples were taken from 34 sites distributed over the Tien River and its tributary canals from 2015 to 2019. The water samples were analyzed for 16 physical, chemical, and biological parameters, which were used for water quality index (WQI) estimation and subjected to two-way ANOVA and principal component analysis/factor analysis (PCA/FA). The WQI in both waterway types tended to get better from the downstream to the upstream zone with an improving rate of WQI faster in the River (from 79 to 88) than in the canals (from 82 to 85). The PCA/FA showed that water from the two waterway types could be polluted by six main pollution sources, one of which was derived from the seawater intrusion, one from aquaculture, and the others from agricultural, residential, and industrial activities. In brief, the inland surface water quality of a coastal area was interactively influenced by spatial distance and waterway types, transferring various pollutants in and out of the inland area.
Binh Thanh Nguyen, Long Ba Le, Long Phi Pham, Hiep Thai Nguyen, Tu Dinh Tran, and Nam Van Thai
Elsevier BV