"I made a commitment to her[Fairouz],as I make a commitment to you here tonight,to do everything so that reforms are implemented and that Lebanon receives better. I promise you. I won't leave you,"he could be heard saying in TV broadcasts.

Macron is visiting for the second time in less than a month to press for a new government made up of experts untainted by corruption and capable of rooting out corruption,waste and negligence as well as rebuilding after the August 4 explosion that wrecked swathes of Beirut,killing more than 180 people.

Politicians have failed to take significant steps to address the crises,and protesters have repeatedly taken to the streets to demand the ouster of what they see as the corrupt political elite responsible.

Addressing journalists at the Presidential Palace after his designation,Adib vowed to swiftly confront the many problems.

"There is no time for talks and promises,"he said."It's time to get to work,and God willing we will succeed in picking a ministerial team of specialists and experts."

The Beirut explosion,officials have said,was caused by the combustion of 2750 tonnes of ammonium nitrate,a compound used in fertiliser and explosives,that had been improperly storied in the port for six years.

The explosion sparked widespread outrage among Lebanese,who saw it as glaring example of how poorly their leaders have managed the country.

Adib's name surfaced as the front-runner to form the next cabinet over the weekend before he was officially designated by President Michel Aoun.

The designation kicks off a horse-trading process between the country's political blocs to determine the make-up of the cabinet,a process that usually takes at least a few weeks but sometimes much longer.

Adib was proposed by a group of four former prime ministers,included Saad Hariri,who heads the country's largest Sunni Muslim party.

In Lebanon's complex system of sectarian power sharing,the prime minister must be a Sunni,the president a Maronite Christian and the speaker of Parliament a Shiite.

Adib secured the broad backing needed to secure the post,including from Hariri's Future Movement,Aoun's Free Patriotic Movement and Hezbollah,the powerful Iranian-backed militant group and political party.

Outgoing prime minister Hassan Diab resigned on August 10 after the port blast and described the country as being mired in widespread corruption engaged in by the country's politicians,many of whom were militia leaders in the 15-year civil war that ended in 1990.

Diab and his cabinet will continue in a caretaker capacity until a new government is formed.

The New York Times,Reuters,AP